diff --git a/src/anki-integration.test.ts b/src/anki-integration.test.ts
index b32f517..8295423 100644
--- a/src/anki-integration.test.ts
+++ b/src/anki-integration.test.ts
@@ -28,7 +28,10 @@ function createIntegrationTestContext(
   };
 
   const stateDir = fs.mkdtempSync(
-    path.join(os.tmpdir(), options.stateDirPrefix ?? "subminer-anki-integration-"),
+    path.join(
+      os.tmpdir(),
+      options.stateDirPrefix ?? "subminer-anki-integration-",
+    ),
   );
   const knownWordCacheStatePath = path.join(stateDir, "known-words-cache.json");
 
diff --git a/src/anki-integration.ts b/src/anki-integration.ts
index 45d751e..c7fd5fe 100644
--- a/src/anki-integration.ts
+++ b/src/anki-integration.ts
@@ -210,16 +210,8 @@ export class AnkiIntegration {
             audioPadding,
             audioStreamIndex,
           ),
-        generateScreenshot: (
-          videoPath,
-          timestamp,
-          options,
-        ) =>
-          this.mediaGenerator.generateScreenshot(
-            videoPath,
-            timestamp,
-            options,
-          ),
+        generateScreenshot: (videoPath, timestamp, options) =>
+          this.mediaGenerator.generateScreenshot(videoPath, timestamp, options),
         generateAnimatedImage: (
           videoPath,
           startTime,
@@ -243,8 +235,10 @@ export class AnkiIntegration {
       beginUpdateProgress: (initialMessage: string) =>
         this.beginUpdateProgress(initialMessage),
       endUpdateProgress: () => this.endUpdateProgress(),
-      withUpdateProgress: <T>(initialMessage: string, action: () => Promise<T>) =>
-        this.withUpdateProgress(initialMessage, action),
+      withUpdateProgress: <T>(
+        initialMessage: string,
+        action: () => Promise<T>,
+      ) => this.withUpdateProgress(initialMessage, action),
       resolveConfiguredFieldName: (noteInfo, ...preferredNames) =>
         this.resolveConfiguredFieldName(noteInfo, ...preferredNames),
       resolveNoteFieldName: (noteInfo, preferredName) =>
@@ -272,11 +266,14 @@ export class AnkiIntegration {
       },
     });
     this.fieldGroupingService = new FieldGroupingService({
-      getEffectiveSentenceCardConfig: () => this.getEffectiveSentenceCardConfig(),
+      getEffectiveSentenceCardConfig: () =>
+        this.getEffectiveSentenceCardConfig(),
       isUpdateInProgress: () => this.updateInProgress,
       getDeck: () => this.config.deck,
-      withUpdateProgress: <T>(initialMessage: string, action: () => Promise<T>) =>
-        this.withUpdateProgress(initialMessage, action),
+      withUpdateProgress: <T>(
+        initialMessage: string,
+        action: () => Promise<T>,
+      ) => this.withUpdateProgress(initialMessage, action),
       showOsdNotification: (text: string) => this.showOsdNotification(text),
       findNotes: async (query, options) =>
         (await this.client.findNotes(query, options)) as number[],
@@ -287,8 +284,7 @@ export class AnkiIntegration {
         this.findDuplicateNote(expression, noteId, noteInfo),
       hasAllConfiguredFields: (noteInfo, configuredFieldNames) =>
         this.hasAllConfiguredFields(noteInfo, configuredFieldNames),
-      processNewCard: (noteId, options) =>
-        this.processNewCard(noteId, options),
+      processNewCard: (noteId, options) => this.processNewCard(noteId, options),
       getSentenceCardImageFieldName: () => this.config.fields?.image,
       resolveFieldName: (availableFieldNames, preferredName) =>
         this.resolveFieldName(availableFieldNames, preferredName),
@@ -307,7 +303,12 @@ export class AnkiIntegration {
           includeGeneratedMedia,
         ),
       getNoteFieldMap: (noteInfo) => this.getNoteFieldMap(noteInfo),
-      handleFieldGroupingAuto: (originalNoteId, newNoteId, newNoteInfo, expression) =>
+      handleFieldGroupingAuto: (
+        originalNoteId,
+        newNoteId,
+        newNoteInfo,
+        expression,
+      ) =>
         this.handleFieldGroupingAuto(
           originalNoteId,
           newNoteId,
@@ -558,7 +559,8 @@ export class AnkiIntegration {
             if (!imageFieldName) {
               log.warn("Image field not found on note, skipping image update");
             } else {
-              const existingImage = noteInfo.fields[imageFieldName]?.value || "";
+              const existingImage =
+                noteInfo.fields[imageFieldName]?.value || "";
               updatedFields[imageFieldName] = this.mergeFieldValue(
                 existingImage,
                 `<img src="${imageFilename}">`,
@@ -782,7 +784,9 @@ export class AnkiIntegration {
   private generateImageFilename(): string {
     const timestamp = Date.now();
     const ext =
-      this.config.media?.imageType === "avif" ? "avif" : this.config.media?.imageFormat;
+      this.config.media?.imageType === "avif"
+        ? "avif"
+        : this.config.media?.imageFormat;
     return `image_${timestamp}.${ext}`;
   }
 
@@ -792,10 +796,7 @@ export class AnkiIntegration {
       showOsd: (text: string) => {
         this.showOsdNotification(text);
       },
-      showSystemNotification: (
-        title: string,
-        options: NotificationOptions,
-      ) => {
+      showSystemNotification: (title: string, options: NotificationOptions) => {
         if (this.notificationCallback) {
           this.notificationCallback(title, options);
         }
@@ -804,9 +805,13 @@ export class AnkiIntegration {
   }
 
   private beginUpdateProgress(initialMessage: string): void {
-    beginUpdateProgress(this.uiFeedbackState, initialMessage, (text: string) => {
-      this.showOsdNotification(text);
-    });
+    beginUpdateProgress(
+      this.uiFeedbackState,
+      initialMessage,
+      (text: string) => {
+        this.showOsdNotification(text);
+      },
+    );
   }
 
   private endUpdateProgress(): void {
@@ -816,12 +821,9 @@ export class AnkiIntegration {
   }
 
   private showProgressTick(): void {
-    showProgressTick(
-      this.uiFeedbackState,
-      (text: string) => {
-        this.showOsdNotification(text);
-      },
-    );
+    showProgressTick(this.uiFeedbackState, (text: string) => {
+      this.showOsdNotification(text);
+    });
   }
 
   private async withUpdateProgress<T>(
@@ -893,9 +895,7 @@ export class AnkiIntegration {
     if (this.parseWarningKeys.has(key)) return;
     this.parseWarningKeys.add(key);
     const suffix = detail ? ` (${detail})` : "";
-    log.warn(
-      `Field grouping parse warning [${fieldName}] ${reason}${suffix}`,
-    );
+    log.warn(`Field grouping parse warning [${fieldName}] ${reason}${suffix}`);
   }
 
   private setCardTypeFields(
@@ -1284,10 +1284,16 @@ export class AnkiIntegration {
   private getStrictSpanGroupingFields(): Set<string> {
     const strictFields = new Set(this.strictGroupingFieldDefaults);
     const sentenceCardConfig = this.getEffectiveSentenceCardConfig();
-    strictFields.add((sentenceCardConfig.sentenceField || "sentence").toLowerCase());
-    strictFields.add((sentenceCardConfig.audioField || "sentenceaudio").toLowerCase());
-    if (this.config.fields?.image) strictFields.add(this.config.fields.image.toLowerCase());
-    if (this.config.fields?.miscInfo) strictFields.add(this.config.fields.miscInfo.toLowerCase());
+    strictFields.add(
+      (sentenceCardConfig.sentenceField || "sentence").toLowerCase(),
+    );
+    strictFields.add(
+      (sentenceCardConfig.audioField || "sentenceaudio").toLowerCase(),
+    );
+    if (this.config.fields?.image)
+      strictFields.add(this.config.fields.image.toLowerCase());
+    if (this.config.fields?.miscInfo)
+      strictFields.add(this.config.fields.miscInfo.toLowerCase());
     return strictFields;
   }
 
@@ -1445,7 +1451,8 @@ export class AnkiIntegration {
         if (imageBuffer) {
           await this.client.storeMediaFile(imageFilename, imageBuffer);
           result.imageField =
-            this.config.fields?.image || DEFAULT_ANKI_CONNECT_CONFIG.fields.image;
+            this.config.fields?.image ||
+            DEFAULT_ANKI_CONNECT_CONFIG.fields.image;
           result.imageValue = `<img src="${imageFilename}">`;
           if (this.config.fields?.miscInfo && !result.miscInfoValue) {
             result.miscInfoValue = this.formatMiscInfoPattern(
@@ -1657,7 +1664,7 @@ export class AnkiIntegration {
     const keepNotesInfoResult = await this.client.notesInfo([keepNoteId]);
     const keepNotesInfo = keepNotesInfoResult as unknown as NoteInfo[];
     if (!keepNotesInfo || keepNotesInfo.length === 0) {
-    log.warn("Keep note not found:", keepNoteId);
+      log.warn("Keep note not found:", keepNoteId);
       return;
     }
     const keepNoteInfo = keepNotesInfo[0];
@@ -1703,10 +1710,7 @@ export class AnkiIntegration {
         sentenceCardConfig.kikuDeleteDuplicateInAuto,
       );
     } catch (error) {
-      log.error(
-        "Field grouping auto merge failed:",
-        (error as Error).message,
-      );
+      log.error("Field grouping auto merge failed:", (error as Error).message);
       this.showOsdNotification(
         `Field grouping failed: ${(error as Error).message}`,
       );
@@ -1720,9 +1724,7 @@ export class AnkiIntegration {
     expression: string,
   ): Promise<boolean> {
     if (!this.fieldGroupingCallback) {
-      log.warn(
-        "No field grouping callback registered, skipping manual mode",
-      );
+      log.warn("No field grouping callback registered, skipping manual mode");
       this.showOsdNotification("Field grouping UI unavailable");
       return false;
     }
@@ -1754,7 +1756,10 @@ export class AnkiIntegration {
         hasAudio:
           this.hasFieldValue(originalNoteInfo, this.config.fields?.audio) ||
           this.hasFieldValue(originalNoteInfo, sentenceCardConfig.audioField),
-        hasImage: this.hasFieldValue(originalNoteInfo, this.config.fields?.image),
+        hasImage: this.hasFieldValue(
+          originalNoteInfo,
+          this.config.fields?.image,
+        ),
         isOriginal: true,
       };
 
@@ -1903,10 +1908,7 @@ export class AnkiIntegration {
           : this.config.isKiku,
     };
 
-    if (
-      wasEnabled &&
-      this.config.nPlusOne?.highlightEnabled === false
-    ) {
+    if (wasEnabled && this.config.nPlusOne?.highlightEnabled === false) {
       this.stopKnownWordCacheLifecycle();
       this.knownWordCache.clearKnownWordCacheState();
     } else {
@@ -1922,7 +1924,6 @@ export class AnkiIntegration {
     }
   }
 
-
   destroy(): void {
     this.stop();
     this.mediaGenerator.cleanup();
diff --git a/src/anki-integration/ai.ts b/src/anki-integration/ai.ts
index 3af1ab8..63b2293 100644
--- a/src/anki-integration/ai.ts
+++ b/src/anki-integration/ai.ts
@@ -83,8 +83,7 @@ export async function translateSentenceWithAi(
   );
   const model = request.model || "openai/gpt-4o-mini";
   const targetLanguage = request.targetLanguage || "English";
-  const prompt =
-    request.systemPrompt?.trim() || DEFAULT_AI_SYSTEM_PROMPT;
+  const prompt = request.systemPrompt?.trim() || DEFAULT_AI_SYSTEM_PROMPT;
 
   try {
     const response = await axios.post(
diff --git a/src/anki-integration/card-creation.ts b/src/anki-integration/card-creation.ts
index a496f62..8db0c4f 100644
--- a/src/anki-integration/card-creation.ts
+++ b/src/anki-integration/card-creation.ts
@@ -22,9 +22,15 @@ interface CardCreationClient {
     fields: Record<string, string>,
   ): Promise<number>;
   notesInfo(noteIds: number[]): Promise<unknown>;
-  updateNoteFields(noteId: number, fields: Record<string, string>): Promise<void>;
+  updateNoteFields(
+    noteId: number,
+    fields: Record<string, string>,
+  ): Promise<void>;
   storeMediaFile(filename: string, data: Buffer): Promise<void>;
-  findNotes(query: string, options?: { maxRetries?: number }): Promise<number[]>;
+  findNotes(
+    query: string,
+    options?: { maxRetries?: number },
+  ): Promise<number[]>;
 }
 
 interface CardCreationMediaGenerator {
@@ -68,10 +74,17 @@ interface CardCreationDeps {
   mediaGenerator: CardCreationMediaGenerator;
   showOsdNotification: (text: string) => void;
   showStatusNotification: (message: string) => void;
-  showNotification: (noteId: number, label: string | number, errorSuffix?: string) => Promise<void>;
+  showNotification: (
+    noteId: number,
+    label: string | number,
+    errorSuffix?: string,
+  ) => Promise<void>;
   beginUpdateProgress: (initialMessage: string) => void;
   endUpdateProgress: () => void;
-  withUpdateProgress: <T>(initialMessage: string, action: () => Promise<T>) => Promise<T>;
+  withUpdateProgress: <T>(
+    initialMessage: string,
+    action: () => Promise<T>,
+  ) => Promise<T>;
   resolveConfiguredFieldName: (
     noteInfo: CardCreationNoteInfo,
     ...preferredNames: (string | undefined)[]
@@ -80,15 +93,27 @@ interface CardCreationDeps {
     noteInfo: CardCreationNoteInfo,
     preferredName?: string,
   ) => string | null;
-  extractFields: (fields: Record<string, { value: string }>) => Record<string, string>;
-  processSentence: (mpvSentence: string, noteFields: Record<string, string>) => string;
+  extractFields: (
+    fields: Record<string, { value: string }>,
+  ) => Record<string, string>;
+  processSentence: (
+    mpvSentence: string,
+    noteFields: Record<string, string>,
+  ) => string;
   setCardTypeFields: (
     updatedFields: Record<string, string>,
     availableFieldNames: string[],
     cardKind: CardKind,
   ) => void;
-  mergeFieldValue: (existing: string, newValue: string, overwrite: boolean) => string;
-  formatMiscInfoPattern: (fallbackFilename: string, startTimeSeconds?: number) => string;
+  mergeFieldValue: (
+    existing: string,
+    newValue: string,
+    overwrite: boolean,
+  ) => string;
+  formatMiscInfoPattern: (
+    fallbackFilename: string,
+    startTimeSeconds?: number,
+  ) => string;
   getEffectiveSentenceCardConfig: () => {
     model?: string;
     sentenceField: string;
@@ -141,14 +166,17 @@ export class CardCreationService {
       }
 
       if (timings.length === 0) {
-        this.deps.showOsdNotification("Subtitle timing not found; copy again while playing");
+        this.deps.showOsdNotification(
+          "Subtitle timing not found; copy again while playing",
+        );
         return;
       }
 
       const rangeStart = Math.min(...timings.map((entry) => entry.startTime));
       let rangeEnd = Math.max(...timings.map((entry) => entry.endTime));
 
-      const maxMediaDuration = this.deps.getConfig().media?.maxMediaDuration ?? 30;
+      const maxMediaDuration =
+        this.deps.getConfig().media?.maxMediaDuration ?? 30;
       if (maxMediaDuration > 0 && rangeEnd - rangeStart > maxMediaDuration) {
         log.warn(
           `Media range ${(rangeEnd - rangeStart).toFixed(1)}s exceeds cap of ${maxMediaDuration}s, clamping`,
@@ -172,7 +200,9 @@ export class CardCreationService {
         }
 
         const noteId = Math.max(...noteIds);
-        const notesInfoResult = (await this.deps.client.notesInfo([noteId])) as CardCreationNoteInfo[];
+        const notesInfoResult = (await this.deps.client.notesInfo([
+          noteId,
+        ])) as CardCreationNoteInfo[];
         if (!notesInfoResult || notesInfoResult.length === 0) {
           this.deps.showOsdNotification("Card not found");
           return;
@@ -181,8 +211,10 @@ export class CardCreationService {
         const noteInfo = notesInfoResult[0];
         const fields = this.deps.extractFields(noteInfo.fields);
         const expressionText = fields.expression || fields.word || "";
-        const sentenceAudioField = this.getResolvedSentenceAudioFieldName(noteInfo);
-        const sentenceField = this.deps.getEffectiveSentenceCardConfig().sentenceField;
+        const sentenceAudioField =
+          this.getResolvedSentenceAudioFieldName(noteInfo);
+        const sentenceField =
+          this.deps.getEffectiveSentenceCardConfig().sentenceField;
 
         const sentence = blocks.join(" ");
         const updatedFields: Record<string, string> = {};
@@ -212,7 +244,8 @@ export class CardCreationService {
             if (audioBuffer) {
               await this.deps.client.storeMediaFile(audioFilename, audioBuffer);
               if (sentenceAudioField) {
-                const existingAudio = noteInfo.fields[sentenceAudioField]?.value || "";
+                const existingAudio =
+                  noteInfo.fields[sentenceAudioField]?.value || "";
                 updatedFields[sentenceAudioField] = this.deps.mergeFieldValue(
                   existingAudio,
                   `[sound:${audioFilename}]`,
@@ -223,10 +256,7 @@ export class CardCreationService {
               updatePerformed = true;
             }
           } catch (error) {
-            log.error(
-              "Failed to generate audio:",
-              (error as Error).message,
-            );
+            log.error("Failed to generate audio:", (error as Error).message);
             errors.push("audio");
           }
         }
@@ -248,9 +278,12 @@ export class CardCreationService {
                 DEFAULT_ANKI_CONNECT_CONFIG.fields.image,
               );
               if (!imageFieldName) {
-                log.warn("Image field not found on note, skipping image update");
+                log.warn(
+                  "Image field not found on note, skipping image update",
+                );
               } else {
-                const existingImage = noteInfo.fields[imageFieldName]?.value || "";
+                const existingImage =
+                  noteInfo.fields[imageFieldName]?.value || "";
                 updatedFields[imageFieldName] = this.deps.mergeFieldValue(
                   existingImage,
                   `<img src="${imageFilename}">`,
@@ -261,10 +294,7 @@ export class CardCreationService {
               }
             }
           } catch (error) {
-            log.error(
-              "Failed to generate image:",
-              (error as Error).message,
-            );
+            log.error("Failed to generate image:", (error as Error).message);
             errors.push("image");
           }
         }
@@ -297,8 +327,13 @@ export class CardCreationService {
         this.deps.endUpdateProgress();
       }
     } catch (error) {
-      log.error("Error updating card from clipboard:", (error as Error).message);
-      this.deps.showOsdNotification(`Update failed: ${(error as Error).message}`);
+      log.error(
+        "Error updating card from clipboard:",
+        (error as Error).message,
+      );
+      this.deps.showOsdNotification(
+        `Update failed: ${(error as Error).message}`,
+      );
     }
   }
 
@@ -330,7 +365,8 @@ export class CardCreationService {
         endTime = currentTime + fallback;
       }
 
-      const maxMediaDuration = this.deps.getConfig().media?.maxMediaDuration ?? 30;
+      const maxMediaDuration =
+        this.deps.getConfig().media?.maxMediaDuration ?? 30;
       if (maxMediaDuration > 0 && endTime - startTime > maxMediaDuration) {
         endTime = startTime + maxMediaDuration;
       }
@@ -346,7 +382,9 @@ export class CardCreationService {
         }
 
         const noteId = Math.max(...noteIds);
-        const notesInfoResult = (await this.deps.client.notesInfo([noteId])) as CardCreationNoteInfo[];
+        const notesInfoResult = (await this.deps.client.notesInfo([
+          noteId,
+        ])) as CardCreationNoteInfo[];
         if (!notesInfoResult || notesInfoResult.length === 0) {
           this.deps.showOsdNotification("Card not found");
           return;
@@ -410,8 +448,7 @@ export class CardCreationService {
             const imageField = this.deps.getConfig().fields?.image;
             if (imageBuffer && imageField) {
               await this.deps.client.storeMediaFile(imageFilename, imageBuffer);
-              updatedFields[imageField] =
-                `<img src="${imageFilename}">`;
+              updatedFields[imageField] = `<img src="${imageFilename}">`;
               miscInfoFilename = imageFilename;
             }
           } catch (error) {
@@ -445,10 +482,7 @@ export class CardCreationService {
         await this.deps.showNotification(noteId, label, errorSuffix);
       });
     } catch (error) {
-      log.error(
-        "Error marking card as audio card:",
-        (error as Error).message,
-      );
+      log.error("Error marking card as audio card:", (error as Error).message);
       this.deps.showOsdNotification(
         `Audio card failed: ${(error as Error).message}`,
       );
@@ -479,7 +513,8 @@ export class CardCreationService {
       return false;
     }
 
-    const maxMediaDuration = this.deps.getConfig().media?.maxMediaDuration ?? 30;
+    const maxMediaDuration =
+      this.deps.getConfig().media?.maxMediaDuration ?? 30;
     if (maxMediaDuration > 0 && endTime - startTime > maxMediaDuration) {
       log.warn(
         `Sentence card media range ${(endTime - startTime).toFixed(1)}s exceeds cap of ${maxMediaDuration}s, clamping`,
@@ -489,162 +524,191 @@ export class CardCreationService {
 
     this.deps.showOsdNotification("Creating sentence card...");
     try {
-      return await this.deps.withUpdateProgress("Creating sentence card", async () => {
-      const videoPath = mpvClient.currentVideoPath;
-      const fields: Record<string, string> = {};
-      const errors: string[] = [];
-      let miscInfoFilename: string | null = null;
+      return await this.deps.withUpdateProgress(
+        "Creating sentence card",
+        async () => {
+          const videoPath = mpvClient.currentVideoPath;
+          const fields: Record<string, string> = {};
+          const errors: string[] = [];
+          let miscInfoFilename: string | null = null;
 
-      const sentenceField = sentenceCardConfig.sentenceField;
-      const audioFieldName = sentenceCardConfig.audioField || "SentenceAudio";
-      const translationField = this.deps.getConfig().fields?.translation || "SelectionText";
-      let resolvedMiscInfoField: string | null = null;
-      let resolvedSentenceAudioField: string = audioFieldName;
-      let resolvedExpressionAudioField: string | null = null;
+          const sentenceField = sentenceCardConfig.sentenceField;
+          const audioFieldName =
+            sentenceCardConfig.audioField || "SentenceAudio";
+          const translationField =
+            this.deps.getConfig().fields?.translation || "SelectionText";
+          let resolvedMiscInfoField: string | null = null;
+          let resolvedSentenceAudioField: string = audioFieldName;
+          let resolvedExpressionAudioField: string | null = null;
 
-      fields[sentenceField] = sentence;
+          fields[sentenceField] = sentence;
 
-      const backText = await resolveSentenceBackText(
-        {
-          sentence,
-          secondarySubText,
-          config: this.deps.getConfig().ai || {},
-        },
-        {
-          logWarning: (message: string) => log.warn(message),
-        },
-      );
-      if (backText) {
-        fields[translationField] = backText;
-      }
-
-      if (sentenceCardConfig.lapisEnabled || sentenceCardConfig.kikuEnabled) {
-        fields.IsSentenceCard = "x";
-        fields.Expression = sentence;
-      }
-
-      const deck = this.deps.getConfig().deck || "Default";
-      let noteId: number;
-      try {
-        noteId = await this.deps.client.addNote(deck, sentenceCardModel, fields);
-        log.info("Created sentence card:", noteId);
-        this.deps.trackLastAddedNoteId?.(noteId);
-      } catch (error) {
-        log.error("Failed to create sentence card:", (error as Error).message);
-        this.deps.showOsdNotification(
-          `Sentence card failed: ${(error as Error).message}`,
-        );
-        return false;
-      }
-
-      try {
-        const noteInfoResult = await this.deps.client.notesInfo([noteId]);
-        const noteInfos = noteInfoResult as CardCreationNoteInfo[];
-        if (noteInfos.length > 0) {
-          const createdNoteInfo = noteInfos[0];
-          this.deps.appendKnownWordsFromNoteInfo(createdNoteInfo);
-          resolvedSentenceAudioField =
-            this.deps.resolveNoteFieldName(createdNoteInfo, audioFieldName) ||
-            audioFieldName;
-          resolvedExpressionAudioField = this.deps.resolveConfiguredFieldName(
-            createdNoteInfo,
-            this.deps.getConfig().fields?.audio || "ExpressionAudio",
+          const backText = await resolveSentenceBackText(
+            {
+              sentence,
+              secondarySubText,
+              config: this.deps.getConfig().ai || {},
+            },
+            {
+              logWarning: (message: string) => log.warn(message),
+            },
           );
-          resolvedMiscInfoField = this.deps.resolveConfiguredFieldName(
-            createdNoteInfo,
-            this.deps.getConfig().fields?.miscInfo,
-          );
-
-          const cardTypeFields: Record<string, string> = {};
-          this.deps.setCardTypeFields(
-            cardTypeFields,
-            Object.keys(createdNoteInfo.fields),
-            "sentence",
-          );
-          if (Object.keys(cardTypeFields).length > 0) {
-            await this.deps.client.updateNoteFields(noteId, cardTypeFields);
+          if (backText) {
+            fields[translationField] = backText;
           }
-        }
-      } catch (error) {
-        log.error(
-          "Failed to normalize sentence card type fields:",
-          (error as Error).message,
-        );
-        errors.push("card type fields");
-      }
 
-      const mediaFields: Record<string, string> = {};
-
-      try {
-        const audioFilename = this.generateAudioFilename();
-        const audioBuffer = await this.mediaGenerateAudio(videoPath, startTime, endTime);
-
-        if (audioBuffer) {
-          await this.deps.client.storeMediaFile(audioFilename, audioBuffer);
-          const audioValue = `[sound:${audioFilename}]`;
-          mediaFields[resolvedSentenceAudioField] = audioValue;
           if (
-            resolvedExpressionAudioField &&
-            resolvedExpressionAudioField !== resolvedSentenceAudioField
+            sentenceCardConfig.lapisEnabled ||
+            sentenceCardConfig.kikuEnabled
           ) {
-            mediaFields[resolvedExpressionAudioField] = audioValue;
+            fields.IsSentenceCard = "x";
+            fields.Expression = sentence;
           }
-          miscInfoFilename = audioFilename;
-        }
-      } catch (error) {
-        log.error("Failed to generate sentence audio:", (error as Error).message);
-        errors.push("audio");
-      }
 
-      try {
-        const imageFilename = this.generateImageFilename();
-        const imageBuffer = await this.generateImageBuffer(videoPath, startTime, endTime);
+          const deck = this.deps.getConfig().deck || "Default";
+          let noteId: number;
+          try {
+            noteId = await this.deps.client.addNote(
+              deck,
+              sentenceCardModel,
+              fields,
+            );
+            log.info("Created sentence card:", noteId);
+            this.deps.trackLastAddedNoteId?.(noteId);
+          } catch (error) {
+            log.error(
+              "Failed to create sentence card:",
+              (error as Error).message,
+            );
+            this.deps.showOsdNotification(
+              `Sentence card failed: ${(error as Error).message}`,
+            );
+            return false;
+          }
 
-        const imageField = this.deps.getConfig().fields?.image;
-        if (imageBuffer && imageField) {
-          await this.deps.client.storeMediaFile(imageFilename, imageBuffer);
-          mediaFields[imageField] = `<img src="${imageFilename}">`;
-          miscInfoFilename = imageFilename;
-        }
-      } catch (error) {
-        log.error("Failed to generate sentence image:", (error as Error).message);
-        errors.push("image");
-      }
+          try {
+            const noteInfoResult = await this.deps.client.notesInfo([noteId]);
+            const noteInfos = noteInfoResult as CardCreationNoteInfo[];
+            if (noteInfos.length > 0) {
+              const createdNoteInfo = noteInfos[0];
+              this.deps.appendKnownWordsFromNoteInfo(createdNoteInfo);
+              resolvedSentenceAudioField =
+                this.deps.resolveNoteFieldName(
+                  createdNoteInfo,
+                  audioFieldName,
+                ) || audioFieldName;
+              resolvedExpressionAudioField =
+                this.deps.resolveConfiguredFieldName(
+                  createdNoteInfo,
+                  this.deps.getConfig().fields?.audio || "ExpressionAudio",
+                );
+              resolvedMiscInfoField = this.deps.resolveConfiguredFieldName(
+                createdNoteInfo,
+                this.deps.getConfig().fields?.miscInfo,
+              );
 
-      if (this.deps.getConfig().fields?.miscInfo) {
-        const miscInfo = this.deps.formatMiscInfoPattern(
-          miscInfoFilename || "",
-          startTime,
-        );
-        if (miscInfo && resolvedMiscInfoField) {
-          mediaFields[resolvedMiscInfoField] = miscInfo;
-        }
-      }
+              const cardTypeFields: Record<string, string> = {};
+              this.deps.setCardTypeFields(
+                cardTypeFields,
+                Object.keys(createdNoteInfo.fields),
+                "sentence",
+              );
+              if (Object.keys(cardTypeFields).length > 0) {
+                await this.deps.client.updateNoteFields(noteId, cardTypeFields);
+              }
+            }
+          } catch (error) {
+            log.error(
+              "Failed to normalize sentence card type fields:",
+              (error as Error).message,
+            );
+            errors.push("card type fields");
+          }
 
-      if (Object.keys(mediaFields).length > 0) {
-        try {
-          await this.deps.client.updateNoteFields(noteId, mediaFields);
-        } catch (error) {
-          log.error(
-            "Failed to update sentence card media:",
-            (error as Error).message,
-          );
-          errors.push("media update");
-        }
-      }
+          const mediaFields: Record<string, string> = {};
 
-      const label =
-        sentence.length > 30 ? sentence.substring(0, 30) + "..." : sentence;
-      const errorSuffix =
-        errors.length > 0 ? `${errors.join(", ")} failed` : undefined;
-      await this.deps.showNotification(noteId, label, errorSuffix);
-      return true;
-    });
-    } catch (error) {
-      log.error(
-        "Error creating sentence card:",
-        (error as Error).message,
+          try {
+            const audioFilename = this.generateAudioFilename();
+            const audioBuffer = await this.mediaGenerateAudio(
+              videoPath,
+              startTime,
+              endTime,
+            );
+
+            if (audioBuffer) {
+              await this.deps.client.storeMediaFile(audioFilename, audioBuffer);
+              const audioValue = `[sound:${audioFilename}]`;
+              mediaFields[resolvedSentenceAudioField] = audioValue;
+              if (
+                resolvedExpressionAudioField &&
+                resolvedExpressionAudioField !== resolvedSentenceAudioField
+              ) {
+                mediaFields[resolvedExpressionAudioField] = audioValue;
+              }
+              miscInfoFilename = audioFilename;
+            }
+          } catch (error) {
+            log.error(
+              "Failed to generate sentence audio:",
+              (error as Error).message,
+            );
+            errors.push("audio");
+          }
+
+          try {
+            const imageFilename = this.generateImageFilename();
+            const imageBuffer = await this.generateImageBuffer(
+              videoPath,
+              startTime,
+              endTime,
+            );
+
+            const imageField = this.deps.getConfig().fields?.image;
+            if (imageBuffer && imageField) {
+              await this.deps.client.storeMediaFile(imageFilename, imageBuffer);
+              mediaFields[imageField] = `<img src="${imageFilename}">`;
+              miscInfoFilename = imageFilename;
+            }
+          } catch (error) {
+            log.error(
+              "Failed to generate sentence image:",
+              (error as Error).message,
+            );
+            errors.push("image");
+          }
+
+          if (this.deps.getConfig().fields?.miscInfo) {
+            const miscInfo = this.deps.formatMiscInfoPattern(
+              miscInfoFilename || "",
+              startTime,
+            );
+            if (miscInfo && resolvedMiscInfoField) {
+              mediaFields[resolvedMiscInfoField] = miscInfo;
+            }
+          }
+
+          if (Object.keys(mediaFields).length > 0) {
+            try {
+              await this.deps.client.updateNoteFields(noteId, mediaFields);
+            } catch (error) {
+              log.error(
+                "Failed to update sentence card media:",
+                (error as Error).message,
+              );
+              errors.push("media update");
+            }
+          }
+
+          const label =
+            sentence.length > 30 ? sentence.substring(0, 30) + "..." : sentence;
+          const errorSuffix =
+            errors.length > 0 ? `${errors.join(", ")} failed` : undefined;
+          await this.deps.showNotification(noteId, label, errorSuffix);
+          return true;
+        },
       );
+    } catch (error) {
+      log.error("Error creating sentence card:", (error as Error).message);
       this.deps.showOsdNotification(
         `Sentence card failed: ${(error as Error).message}`,
       );
@@ -652,13 +716,19 @@ export class CardCreationService {
     }
   }
 
-  private getResolvedSentenceAudioFieldName(noteInfo: CardCreationNoteInfo): string | null {
+  private getResolvedSentenceAudioFieldName(
+    noteInfo: CardCreationNoteInfo,
+  ): string | null {
     return (
       this.deps.resolveNoteFieldName(
         noteInfo,
-        this.deps.getEffectiveSentenceCardConfig().audioField || "SentenceAudio",
+        this.deps.getEffectiveSentenceCardConfig().audioField ||
+          "SentenceAudio",
       ) ||
-      this.deps.resolveConfiguredFieldName(noteInfo, this.deps.getConfig().fields?.audio)
+      this.deps.resolveConfiguredFieldName(
+        noteInfo,
+        this.deps.getConfig().fields?.audio,
+      )
     );
   }
 
@@ -673,12 +743,12 @@ export class CardCreationService {
     }
 
     return this.deps.mediaGenerator.generateAudio(
-        videoPath,
-        startTime,
-        endTime,
-        this.deps.getConfig().media?.audioPadding,
-        mpvClient.currentAudioStreamIndex ?? undefined,
-      );
+      videoPath,
+      startTime,
+      endTime,
+      this.deps.getConfig().media?.audioPadding,
+      mpvClient.currentAudioStreamIndex ?? undefined,
+    );
   }
 
   private async generateImageBuffer(
@@ -718,7 +788,10 @@ export class CardCreationService {
     }
 
     return this.deps.mediaGenerator.generateScreenshot(videoPath, timestamp, {
-      format: this.deps.getConfig().media?.imageFormat as "jpg" | "png" | "webp",
+      format: this.deps.getConfig().media?.imageFormat as
+        | "jpg"
+        | "png"
+        | "webp",
       quality: this.deps.getConfig().media?.imageQuality,
       maxWidth: this.deps.getConfig().media?.imageMaxWidth,
       maxHeight: this.deps.getConfig().media?.imageMaxHeight,
@@ -733,7 +806,9 @@ export class CardCreationService {
   private generateImageFilename(): string {
     const timestamp = Date.now();
     const ext =
-      this.deps.getConfig().media?.imageType === "avif" ? "avif" : this.deps.getConfig().media?.imageFormat;
+      this.deps.getConfig().media?.imageType === "avif"
+        ? "avif"
+        : this.deps.getConfig().media?.imageFormat;
     return `image_${timestamp}.${ext}`;
   }
 }
diff --git a/src/anki-integration/duplicate.ts b/src/anki-integration/duplicate.ts
index 025e766..52d4f32 100644
--- a/src/anki-integration/duplicate.ts
+++ b/src/anki-integration/duplicate.ts
@@ -14,7 +14,10 @@ export interface DuplicateDetectionDeps {
   ) => Promise<unknown>;
   notesInfo: (noteIds: number[]) => Promise<unknown>;
   getDeck: () => string | null | undefined;
-  resolveFieldName: (noteInfo: NoteInfo, preferredName: string) => string | null;
+  resolveFieldName: (
+    noteInfo: NoteInfo,
+    preferredName: string,
+  ) => string | null;
   logWarn: (message: string, error: unknown) => void;
 }
 
@@ -44,7 +47,9 @@ export async function findDuplicateNote(
   const query = `${deckPrefix}"${escapedFieldName}:${escapedExpression}"`;
 
   try {
-    const noteIds = (await deps.findNotes(query, { maxRetries: 0 }) as number[]);
+    const noteIds = (await deps.findNotes(query, {
+      maxRetries: 0,
+    })) as number[];
     return await findFirstExactDuplicateNoteId(
       noteIds,
       excludeNoteId,
diff --git a/src/anki-integration/field-grouping.ts b/src/anki-integration/field-grouping.ts
index ead6062..83bb779 100644
--- a/src/anki-integration/field-grouping.ts
+++ b/src/anki-integration/field-grouping.ts
@@ -20,7 +20,10 @@ interface FieldGroupingDeps {
   };
   isUpdateInProgress: () => boolean;
   getDeck?: () => string | undefined;
-  withUpdateProgress: <T>(initialMessage: string, action: () => Promise<T>) => Promise<T>;
+  withUpdateProgress: <T>(
+    initialMessage: string,
+    action: () => Promise<T>,
+  ) => Promise<T>;
   showOsdNotification: (text: string) => void;
   findNotes: (
     query: string,
@@ -29,7 +32,9 @@ interface FieldGroupingDeps {
     },
   ) => Promise<number[]>;
   notesInfo: (noteIds: number[]) => Promise<FieldGroupingNoteInfo[]>;
-  extractFields: (fields: Record<string, { value: string }>) => Record<string, string>;
+  extractFields: (
+    fields: Record<string, { value: string }>,
+  ) => Record<string, string>;
   findDuplicateNote: (
     expression: string,
     excludeNoteId: number,
@@ -90,81 +95,83 @@ export class FieldGroupingService {
     }
 
     try {
-      await this.deps.withUpdateProgress("Grouping duplicate cards", async () => {
-        const deck = this.deps.getDeck ? this.deps.getDeck() : undefined;
-        const query = deck ? `"deck:${deck}" added:1` : "added:1";
-        const noteIds = await this.deps.findNotes(query);
-        if (!noteIds || noteIds.length === 0) {
-          this.deps.showOsdNotification("No recently added cards found");
-          return;
-        }
+      await this.deps.withUpdateProgress(
+        "Grouping duplicate cards",
+        async () => {
+          const deck = this.deps.getDeck ? this.deps.getDeck() : undefined;
+          const query = deck ? `"deck:${deck}" added:1` : "added:1";
+          const noteIds = await this.deps.findNotes(query);
+          if (!noteIds || noteIds.length === 0) {
+            this.deps.showOsdNotification("No recently added cards found");
+            return;
+          }
 
-        const noteId = Math.max(...noteIds);
-        const notesInfoResult = await this.deps.notesInfo([noteId]);
-        const notesInfo = notesInfoResult as FieldGroupingNoteInfo[];
-        if (!notesInfo || notesInfo.length === 0) {
-          this.deps.showOsdNotification("Card not found");
-          return;
-        }
-        const noteInfoBeforeUpdate = notesInfo[0];
-        const fields = this.deps.extractFields(noteInfoBeforeUpdate.fields);
-        const expressionText = fields.expression || fields.word || "";
-        if (!expressionText) {
-          this.deps.showOsdNotification("No expression/word field found");
-          return;
-        }
+          const noteId = Math.max(...noteIds);
+          const notesInfoResult = await this.deps.notesInfo([noteId]);
+          const notesInfo = notesInfoResult as FieldGroupingNoteInfo[];
+          if (!notesInfo || notesInfo.length === 0) {
+            this.deps.showOsdNotification("Card not found");
+            return;
+          }
+          const noteInfoBeforeUpdate = notesInfo[0];
+          const fields = this.deps.extractFields(noteInfoBeforeUpdate.fields);
+          const expressionText = fields.expression || fields.word || "";
+          if (!expressionText) {
+            this.deps.showOsdNotification("No expression/word field found");
+            return;
+          }
 
-        const duplicateNoteId = await this.deps.findDuplicateNote(
-          expressionText,
-          noteId,
-          noteInfoBeforeUpdate,
-        );
-        if (duplicateNoteId === null) {
-          this.deps.showOsdNotification("No duplicate card found");
-          return;
-        }
+          const duplicateNoteId = await this.deps.findDuplicateNote(
+            expressionText,
+            noteId,
+            noteInfoBeforeUpdate,
+          );
+          if (duplicateNoteId === null) {
+            this.deps.showOsdNotification("No duplicate card found");
+            return;
+          }
 
-        if (
-          !this.deps.hasAllConfiguredFields(noteInfoBeforeUpdate, [
-            this.deps.getSentenceCardImageFieldName(),
-          ])
-        ) {
-          await this.deps.processNewCard(noteId, { skipKikuFieldGrouping: true });
-        }
+          if (
+            !this.deps.hasAllConfiguredFields(noteInfoBeforeUpdate, [
+              this.deps.getSentenceCardImageFieldName(),
+            ])
+          ) {
+            await this.deps.processNewCard(noteId, {
+              skipKikuFieldGrouping: true,
+            });
+          }
 
-        const refreshedInfoResult = await this.deps.notesInfo([noteId]);
-        const refreshedInfo = refreshedInfoResult as FieldGroupingNoteInfo[];
-        if (!refreshedInfo || refreshedInfo.length === 0) {
-          this.deps.showOsdNotification("Card not found");
-          return;
-        }
+          const refreshedInfoResult = await this.deps.notesInfo([noteId]);
+          const refreshedInfo = refreshedInfoResult as FieldGroupingNoteInfo[];
+          if (!refreshedInfo || refreshedInfo.length === 0) {
+            this.deps.showOsdNotification("Card not found");
+            return;
+          }
 
-        const noteInfo = refreshedInfo[0];
+          const noteInfo = refreshedInfo[0];
 
-        if (sentenceCardConfig.kikuFieldGrouping === "auto") {
-          await this.deps.handleFieldGroupingAuto(
+          if (sentenceCardConfig.kikuFieldGrouping === "auto") {
+            await this.deps.handleFieldGroupingAuto(
+              duplicateNoteId,
+              noteId,
+              noteInfo,
+              expressionText,
+            );
+            return;
+          }
+          const handled = await this.deps.handleFieldGroupingManual(
             duplicateNoteId,
             noteId,
             noteInfo,
             expressionText,
           );
-          return;
-        }
-        const handled = await this.deps.handleFieldGroupingManual(
-          duplicateNoteId,
-          noteId,
-          noteInfo,
-          expressionText,
-        );
-        if (!handled) {
-          this.deps.showOsdNotification("Field grouping cancelled");
-        }
-      });
-    } catch (error) {
-      log.error(
-        "Error triggering field grouping:",
-        (error as Error).message,
+          if (!handled) {
+            this.deps.showOsdNotification("Field grouping cancelled");
+          }
+        },
       );
+    } catch (error) {
+      log.error("Error triggering field grouping:", (error as Error).message);
       this.deps.showOsdNotification(
         `Field grouping failed: ${(error as Error).message}`,
       );
diff --git a/src/anki-integration/known-word-cache.ts b/src/anki-integration/known-word-cache.ts
index 6fd8bb4..8240ff0 100644
--- a/src/anki-integration/known-word-cache.ts
+++ b/src/anki-integration/known-word-cache.ts
@@ -46,7 +46,8 @@ export class KnownWordCacheManager {
 
   constructor(private readonly deps: KnownWordCacheDeps) {
     this.statePath = path.normalize(
-      deps.knownWordCacheStatePath || path.join(process.cwd(), "known-words-cache.json"),
+      deps.knownWordCacheStatePath ||
+        path.join(process.cwd(), "known-words-cache.json"),
     );
   }
 
@@ -140,7 +141,10 @@ export class KnownWordCacheManager {
         fs.unlinkSync(this.statePath);
       }
     } catch (error) {
-      log.warn("Failed to clear known-word cache state:", (error as Error).message);
+      log.warn(
+        "Failed to clear known-word cache state:",
+        (error as Error).message,
+      );
     }
   }
 
@@ -171,7 +175,9 @@ export class KnownWordCacheManager {
         const chunkSize = 50;
         for (let i = 0; i < noteIds.length; i += chunkSize) {
           const chunk = noteIds.slice(i, i + chunkSize);
-          const notesInfoResult = (await this.deps.client.notesInfo(chunk)) as unknown[];
+          const notesInfoResult = (await this.deps.client.notesInfo(
+            chunk,
+          )) as unknown[];
           const notesInfo = notesInfoResult as KnownWordCacheNoteInfo[];
 
           for (const noteInfo of notesInfo) {
@@ -196,7 +202,9 @@ export class KnownWordCacheManager {
       );
     } catch (error) {
       log.warn("Failed to refresh known-word cache:", (error as Error).message);
-      this.deps.showStatusNotification("AnkiConnect: unable to refresh known words");
+      this.deps.showStatusNotification(
+        "AnkiConnect: unable to refresh known words",
+      );
     } finally {
       this.isRefreshingKnownWords = false;
     }
@@ -313,7 +321,10 @@ export class KnownWordCacheManager {
       this.knownWordsLastRefreshedAtMs = parsed.refreshedAtMs;
       this.knownWordsScope = parsed.scope;
     } catch (error) {
-      log.warn("Failed to load known-word cache state:", (error as Error).message);
+      log.warn(
+        "Failed to load known-word cache state:",
+        (error as Error).message,
+      );
       this.knownWords = new Set();
       this.knownWordsLastRefreshedAtMs = 0;
       this.knownWordsScope = this.getKnownWordCacheScope();
@@ -330,7 +341,10 @@ export class KnownWordCacheManager {
       };
       fs.writeFileSync(this.statePath, JSON.stringify(state), "utf-8");
     } catch (error) {
-      log.warn("Failed to persist known-word cache state:", (error as Error).message);
+      log.warn(
+        "Failed to persist known-word cache state:",
+        (error as Error).message,
+      );
     }
   }
 
@@ -349,11 +363,16 @@ export class KnownWordCacheManager {
     return true;
   }
 
-  private extractKnownWordsFromNoteInfo(noteInfo: KnownWordCacheNoteInfo): string[] {
+  private extractKnownWordsFromNoteInfo(
+    noteInfo: KnownWordCacheNoteInfo,
+  ): string[] {
     const words: string[] = [];
     const preferredFields = ["Expression", "Word"];
     for (const preferredField of preferredFields) {
-      const fieldName = resolveFieldName(Object.keys(noteInfo.fields), preferredField);
+      const fieldName = resolveFieldName(
+        Object.keys(noteInfo.fields),
+        preferredField,
+      );
       if (!fieldName) continue;
 
       const raw = noteInfo.fields[fieldName]?.value;
@@ -387,12 +406,14 @@ function resolveFieldName(
   if (exact) return exact;
 
   const lower = preferredName.toLowerCase();
-  return availableFieldNames.find((name) => name.toLowerCase() === lower) || null;
+  return (
+    availableFieldNames.find((name) => name.toLowerCase() === lower) || null
+  );
 }
 
 function escapeAnkiSearchValue(value: string): string {
   return value
     .replace(/\\/g, "\\\\")
-    .replace(/\"/g, "\\\"")
+    .replace(/\"/g, '\\"')
     .replace(/([:*?()\[\]{}])/g, "\\$1");
 }
diff --git a/src/anki-integration/polling.ts b/src/anki-integration/polling.ts
index 345bec4..e67ade8 100644
--- a/src/anki-integration/polling.ts
+++ b/src/anki-integration/polling.ts
@@ -56,7 +56,9 @@ export class PollingRunner {
 
     this.deps.setUpdateInProgress(true);
     try {
-      const query = this.deps.getDeck() ? `"deck:${this.deps.getDeck()}" added:1` : "added:1";
+      const query = this.deps.getDeck()
+        ? `"deck:${this.deps.getDeck()}" added:1`
+        : "added:1";
       const noteIds = await this.deps.findNotes(query, {
         maxRetries: 0,
       });
diff --git a/src/anki-integration/ui-feedback.ts b/src/anki-integration/ui-feedback.ts
index 94cb6e4..69c6cb3 100644
--- a/src/anki-integration/ui-feedback.ts
+++ b/src/anki-integration/ui-feedback.ts
@@ -10,10 +10,7 @@ export interface UiFeedbackState {
 export interface UiFeedbackNotificationContext {
   getNotificationType: () => string | undefined;
   showOsd: (text: string) => void;
-  showSystemNotification: (
-    title: string,
-    options: NotificationOptions,
-  ) => void;
+  showSystemNotification: (title: string, options: NotificationOptions) => void;
 }
 
 export interface UiFeedbackOptions {
@@ -57,7 +54,9 @@ export function beginUpdateProgress(
   state.progressFrame = 0;
   showProgressTick(`${state.progressMessage}`);
   state.progressTimer = setInterval(() => {
-    showProgressTick(`${state.progressMessage} ${["|", "/", "-", "\\"][state.progressFrame % 4]}`);
+    showProgressTick(
+      `${state.progressMessage} ${["|", "/", "-", "\\"][state.progressFrame % 4]}`,
+    );
     state.progressFrame += 1;
   }, 180);
 }
diff --git a/src/core/services/anilist/anilist-token-store.test.ts b/src/core/services/anilist/anilist-token-store.test.ts
index d6022ca..6a7a902 100644
--- a/src/core/services/anilist/anilist-token-store.test.ts
+++ b/src/core/services/anilist/anilist-token-store.test.ts
@@ -34,7 +34,8 @@ const hasSafeStorage =
 
 const originalSafeStorage: SafeStorageLike | null = hasSafeStorage
   ? {
-      isEncryptionAvailable: safeStorageApi.isEncryptionAvailable as () => boolean,
+      isEncryptionAvailable:
+        safeStorageApi.isEncryptionAvailable as () => boolean,
       encryptString: safeStorageApi.encryptString as (value: string) => Buffer,
       decryptString: safeStorageApi.decryptString as (value: Buffer) => string,
     }
@@ -87,76 +88,92 @@ function restoreSafeStorage(): void {
   ).decryptString = originalSafeStorage.decryptString;
 }
 
-test("anilist token store saves and loads encrypted token", { skip: !hasSafeStorage }, () => {
-  mockSafeStorage(true);
-  try {
+test(
+  "anilist token store saves and loads encrypted token",
+  { skip: !hasSafeStorage },
+  () => {
+    mockSafeStorage(true);
+    try {
+      const filePath = createTempTokenFile();
+      const store = createAnilistTokenStore(filePath, createLogger());
+      store.saveToken("  demo-token  ");
+
+      const payload = JSON.parse(fs.readFileSync(filePath, "utf-8")) as {
+        encryptedToken?: string;
+        plaintextToken?: string;
+      };
+      assert.equal(typeof payload.encryptedToken, "string");
+      assert.equal(payload.plaintextToken, undefined);
+      assert.equal(store.loadToken(), "demo-token");
+    } finally {
+      restoreSafeStorage();
+    }
+  },
+);
+
+test(
+  "anilist token store falls back to plaintext when encryption unavailable",
+  { skip: !hasSafeStorage },
+  () => {
+    mockSafeStorage(false);
+    try {
+      const filePath = createTempTokenFile();
+      const store = createAnilistTokenStore(filePath, createLogger());
+      store.saveToken("plain-token");
+
+      const payload = JSON.parse(fs.readFileSync(filePath, "utf-8")) as {
+        plaintextToken?: string;
+      };
+      assert.equal(payload.plaintextToken, "plain-token");
+      assert.equal(store.loadToken(), "plain-token");
+    } finally {
+      restoreSafeStorage();
+    }
+  },
+);
+
+test(
+  "anilist token store migrates legacy plaintext to encrypted",
+  { skip: !hasSafeStorage },
+  () => {
     const filePath = createTempTokenFile();
-    const store = createAnilistTokenStore(filePath, createLogger());
-    store.saveToken("  demo-token  ");
+    fs.writeFileSync(
+      filePath,
+      JSON.stringify({ plaintextToken: "legacy-token", updatedAt: Date.now() }),
+      "utf-8",
+    );
 
-    const payload = JSON.parse(fs.readFileSync(filePath, "utf-8")) as {
-      encryptedToken?: string;
-      plaintextToken?: string;
-    };
-    assert.equal(typeof payload.encryptedToken, "string");
-    assert.equal(payload.plaintextToken, undefined);
-    assert.equal(store.loadToken(), "demo-token");
-  } finally {
-    restoreSafeStorage();
-  }
-});
+    mockSafeStorage(true);
+    try {
+      const store = createAnilistTokenStore(filePath, createLogger());
+      assert.equal(store.loadToken(), "legacy-token");
 
-test("anilist token store falls back to plaintext when encryption unavailable", { skip: !hasSafeStorage }, () => {
-  mockSafeStorage(false);
-  try {
-    const filePath = createTempTokenFile();
-    const store = createAnilistTokenStore(filePath, createLogger());
-    store.saveToken("plain-token");
+      const payload = JSON.parse(fs.readFileSync(filePath, "utf-8")) as {
+        encryptedToken?: string;
+        plaintextToken?: string;
+      };
+      assert.equal(typeof payload.encryptedToken, "string");
+      assert.equal(payload.plaintextToken, undefined);
+    } finally {
+      restoreSafeStorage();
+    }
+  },
+);
 
-    const payload = JSON.parse(fs.readFileSync(filePath, "utf-8")) as {
-      plaintextToken?: string;
-    };
-    assert.equal(payload.plaintextToken, "plain-token");
-    assert.equal(store.loadToken(), "plain-token");
-  } finally {
-    restoreSafeStorage();
-  }
-});
-
-test("anilist token store migrates legacy plaintext to encrypted", { skip: !hasSafeStorage }, () => {
-  const filePath = createTempTokenFile();
-  fs.writeFileSync(
-    filePath,
-    JSON.stringify({ plaintextToken: "legacy-token", updatedAt: Date.now() }),
-    "utf-8",
-  );
-
-  mockSafeStorage(true);
-  try {
-    const store = createAnilistTokenStore(filePath, createLogger());
-    assert.equal(store.loadToken(), "legacy-token");
-
-    const payload = JSON.parse(fs.readFileSync(filePath, "utf-8")) as {
-      encryptedToken?: string;
-      plaintextToken?: string;
-    };
-    assert.equal(typeof payload.encryptedToken, "string");
-    assert.equal(payload.plaintextToken, undefined);
-  } finally {
-    restoreSafeStorage();
-  }
-});
-
-test("anilist token store clears persisted token file", { skip: !hasSafeStorage }, () => {
-  mockSafeStorage(true);
-  try {
-    const filePath = createTempTokenFile();
-    const store = createAnilistTokenStore(filePath, createLogger());
-    store.saveToken("to-clear");
-    assert.equal(fs.existsSync(filePath), true);
-    store.clearToken();
-    assert.equal(fs.existsSync(filePath), false);
-  } finally {
-    restoreSafeStorage();
-  }
-});
+test(
+  "anilist token store clears persisted token file",
+  { skip: !hasSafeStorage },
+  () => {
+    mockSafeStorage(true);
+    try {
+      const filePath = createTempTokenFile();
+      const store = createAnilistTokenStore(filePath, createLogger());
+      store.saveToken("to-clear");
+      assert.equal(fs.existsSync(filePath), true);
+      store.clearToken();
+      assert.equal(fs.existsSync(filePath), false);
+    } finally {
+      restoreSafeStorage();
+    }
+  },
+);
diff --git a/src/core/services/anilist/anilist-update-queue.test.ts b/src/core/services/anilist/anilist-update-queue.test.ts
index a10da10..cf3f1fd 100644
--- a/src/core/services/anilist/anilist-update-queue.test.ts
+++ b/src/core/services/anilist/anilist-update-queue.test.ts
@@ -43,7 +43,11 @@ test("anilist update queue enqueues, snapshots, and dequeues success", () => {
     ready: 0,
     deadLetter: 0,
   });
-  assert.ok(loggerState.info.some((message) => message.includes("Queued AniList retry")));
+  assert.ok(
+    loggerState.info.some((message) =>
+      message.includes("Queued AniList retry"),
+    ),
+  );
 });
 
 test("anilist update queue applies retry backoff and dead-letter", () => {
@@ -89,5 +93,8 @@ test("anilist update queue persists and reloads from disk", () => {
     ready: 1,
     deadLetter: 0,
   });
-  assert.equal(queueB.nextReady(Number.MAX_SAFE_INTEGER)?.title, "Persist Demo");
+  assert.equal(
+    queueB.nextReady(Number.MAX_SAFE_INTEGER)?.title,
+    "Persist Demo",
+  );
 });
diff --git a/src/core/services/anilist/anilist-update-queue.ts b/src/core/services/anilist/anilist-update-queue.ts
index 4ee3c13..ac9a8b5 100644
--- a/src/core/services/anilist/anilist-update-queue.ts
+++ b/src/core/services/anilist/anilist-update-queue.ts
@@ -43,7 +43,8 @@ function ensureDir(filePath: string): void {
 }
 
 function clampBackoffMs(attemptCount: number): number {
-  const computed = INITIAL_BACKOFF_MS * Math.pow(2, Math.max(0, attemptCount - 1));
+  const computed =
+    INITIAL_BACKOFF_MS * Math.pow(2, Math.max(0, attemptCount - 1));
   return Math.min(MAX_BACKOFF_MS, computed);
 }
 
@@ -184,7 +185,9 @@ export function createAnilistUpdateQueue(
     },
 
     getSnapshot(nowMs: number = Date.now()): AnilistRetryQueueSnapshot {
-      const ready = pending.filter((item) => item.nextAttemptAt <= nowMs).length;
+      const ready = pending.filter(
+        (item) => item.nextAttemptAt <= nowMs,
+      ).length;
       return {
         pending: pending.length,
         ready,
diff --git a/src/core/services/anilist/anilist-updater.test.ts b/src/core/services/anilist/anilist-updater.test.ts
index b1971d7..4a8cd46 100644
--- a/src/core/services/anilist/anilist-updater.test.ts
+++ b/src/core/services/anilist/anilist-updater.test.ts
@@ -22,9 +22,14 @@ test("guessAnilistMediaInfo uses guessit output when available", async () => {
     }
   ).execFile = ((...args: unknown[]) => {
     const callback = args[args.length - 1];
-    const cb = typeof callback === "function"
-      ? (callback as (error: Error | null, stdout: string, stderr: string) => void)
-      : null;
+    const cb =
+      typeof callback === "function"
+        ? (callback as (
+            error: Error | null,
+            stdout: string,
+            stderr: string,
+          ) => void)
+        : null;
     cb?.(null, JSON.stringify({ title: "Guessit Title", episode: 7 }), "");
     return {} as childProcess.ChildProcess;
   }) as typeof childProcess.execFile;
@@ -53,9 +58,14 @@ test("guessAnilistMediaInfo falls back to parser when guessit fails", async () =
     }
   ).execFile = ((...args: unknown[]) => {
     const callback = args[args.length - 1];
-    const cb = typeof callback === "function"
-      ? (callback as (error: Error | null, stdout: string, stderr: string) => void)
-      : null;
+    const cb =
+      typeof callback === "function"
+        ? (callback as (
+            error: Error | null,
+            stdout: string,
+            stderr: string,
+          ) => void)
+        : null;
     cb?.(new Error("guessit not found"), "", "");
     return {} as childProcess.ChildProcess;
   }) as typeof childProcess.execFile;
@@ -115,7 +125,11 @@ test("updateAnilistPostWatchProgress updates progress when behind", async () =>
   }) as typeof fetch;
 
   try {
-    const result = await updateAnilistPostWatchProgress("token", "Demo Show", 3);
+    const result = await updateAnilistPostWatchProgress(
+      "token",
+      "Demo Show",
+      3,
+    );
     assert.equal(result.status, "updated");
     assert.match(result.message, /episode 3/i);
   } finally {
@@ -145,7 +159,11 @@ test("updateAnilistPostWatchProgress skips when progress already reached", async
   }) as typeof fetch;
 
   try {
-    const result = await updateAnilistPostWatchProgress("token", "Skip Show", 10);
+    const result = await updateAnilistPostWatchProgress(
+      "token",
+      "Skip Show",
+      10,
+    );
     assert.equal(result.status, "skipped");
     assert.match(result.message, /already at episode/i);
   } finally {
diff --git a/src/core/services/anilist/anilist-updater.ts b/src/core/services/anilist/anilist-updater.ts
index cc72b10..cf5219a 100644
--- a/src/core/services/anilist/anilist-updater.ts
+++ b/src/core/services/anilist/anilist-updater.ts
@@ -128,15 +128,16 @@ async function anilistGraphQl<T>(
     return {
       errors: [
         {
-          message:
-            error instanceof Error ? error.message : String(error),
+          message: error instanceof Error ? error.message : String(error),
         },
       ],
     };
   }
 }
 
-function firstErrorMessage<T>(response: AnilistGraphQlResponse<T>): string | null {
+function firstErrorMessage<T>(
+  response: AnilistGraphQlResponse<T>,
+): string | null {
   const firstError = response.errors?.find((item) => Boolean(item?.message));
   return firstError?.message ?? null;
 }
@@ -163,11 +164,7 @@ function pickBestSearchResult(
 
   const normalizedTarget = normalizeTitle(title);
   const exact = candidates.find((item) => {
-    const titles = [
-      item.title?.romaji,
-      item.title?.english,
-      item.title?.native,
-    ]
+    const titles = [item.title?.romaji, item.title?.english, item.title?.native]
       .filter((value): value is string => typeof value === "string")
       .map((value) => normalizeTitle(value));
     return titles.includes(normalizedTarget);
@@ -240,7 +237,10 @@ export async function updateAnilistPostWatchProgress(
   );
   const searchError = firstErrorMessage(searchResponse);
   if (searchError) {
-    return { status: "error", message: `AniList search failed: ${searchError}` };
+    return {
+      status: "error",
+      message: `AniList search failed: ${searchError}`,
+    };
   }
 
   const media = searchResponse.data?.Page?.media ?? [];
@@ -266,10 +266,14 @@ export async function updateAnilistPostWatchProgress(
   );
   const entryError = firstErrorMessage(entryResponse);
   if (entryError) {
-    return { status: "error", message: `AniList entry lookup failed: ${entryError}` };
+    return {
+      status: "error",
+      message: `AniList entry lookup failed: ${entryError}`,
+    };
   }
 
-  const currentProgress = entryResponse.data?.Media?.mediaListEntry?.progress ?? 0;
+  const currentProgress =
+    entryResponse.data?.Media?.mediaListEntry?.progress ?? 0;
   if (typeof currentProgress === "number" && currentProgress >= episode) {
     return {
       status: "skipped",
diff --git a/src/core/services/anki-jimaku-ipc.ts b/src/core/services/anki-jimaku-ipc.ts
index 610d508..080e5bc 100644
--- a/src/core/services/anki-jimaku-ipc.ts
+++ b/src/core/services/anki-jimaku-ipc.ts
@@ -45,9 +45,7 @@ export interface AnkiJimakuIpcDeps {
   onDownloadedSubtitle: (pathToSubtitle: string) => void;
 }
 
-export function registerAnkiJimakuIpcHandlers(
-  deps: AnkiJimakuIpcDeps,
-): void {
+export function registerAnkiJimakuIpcHandlers(deps: AnkiJimakuIpcDeps): void {
   ipcMain.on(
     "set-anki-connect-enabled",
     (_event: IpcMainEvent, enabled: boolean) => {
@@ -106,7 +104,10 @@ export function registerAnkiJimakuIpcHandlers(
 
   ipcMain.handle(
     "jimaku:download-file",
-    async (_event, query: JimakuDownloadQuery): Promise<JimakuDownloadResult> => {
+    async (
+      _event,
+      query: JimakuDownloadQuery,
+    ): Promise<JimakuDownloadResult> => {
       const apiKey = await deps.resolveJimakuApiKey();
       if (!apiKey) {
         return {
diff --git a/src/core/services/anki-jimaku.test.ts b/src/core/services/anki-jimaku.test.ts
index eaf63fd..0131e4e 100644
--- a/src/core/services/anki-jimaku.test.ts
+++ b/src/core/services/anki-jimaku.test.ts
@@ -24,7 +24,10 @@ function createHarness(): RuntimeHarness {
     fieldGroupingResolver: null as ((choice: unknown) => void) | null,
     patches: [] as boolean[],
     broadcasts: 0,
-    fetchCalls: [] as Array<{ endpoint: string; query?: Record<string, unknown> }>,
+    fetchCalls: [] as Array<{
+      endpoint: string;
+      query?: Record<string, unknown>;
+    }>,
     sentCommands: [] as Array<{ command: string[] }>,
   };
 
@@ -45,8 +48,7 @@ function createHarness(): RuntimeHarness {
     setAnkiIntegration: (integration) => {
       state.ankiIntegration = integration;
     },
-    getKnownWordCacheStatePath: () =>
-      "/tmp/subminer-known-words-cache.json",
+    getKnownWordCacheStatePath: () => "/tmp/subminer-known-words-cache.json",
     showDesktopNotification: () => {},
     createFieldGroupingCallback: () => async () => ({
       keepNoteId: 1,
@@ -71,7 +73,10 @@ function createHarness(): RuntimeHarness {
     }),
     getCurrentMediaPath: () => "/tmp/video.mkv",
     jimakuFetchJson: async (endpoint, query) => {
-      state.fetchCalls.push({ endpoint, query: query as Record<string, unknown> });
+      state.fetchCalls.push({
+        endpoint,
+        query: query as Record<string, unknown>,
+      });
       return {
         ok: true,
         data: [
@@ -92,12 +97,12 @@ function createHarness(): RuntimeHarness {
   };
 
   let registered: Record<string, (...args: unknown[]) => unknown> = {};
-  registerAnkiJimakuIpcRuntime(
-    options,
-    (deps) => {
-      registered = deps as unknown as Record<string, (...args: unknown[]) => unknown>;
-    },
-  );
+  registerAnkiJimakuIpcRuntime(options, (deps) => {
+    registered = deps as unknown as Record<
+      string,
+      (...args: unknown[]) => unknown
+    >;
+  });
 
   return { options, registered, state };
 }
@@ -177,9 +182,11 @@ test("clearAnkiHistory and respondFieldGrouping execute runtime callbacks", () =
 
   const originalGetTracker = options.getSubtitleTimingTracker;
   options.getSubtitleTimingTracker = () =>
-    ({ cleanup: () => {
-      cleaned += 1;
-    } }) as never;
+    ({
+      cleanup: () => {
+        cleaned += 1;
+      },
+    }) as never;
 
   const choice = {
     keepNoteId: 10,
diff --git a/src/core/services/anki-jimaku.ts b/src/core/services/anki-jimaku.ts
index d4a5f7e..f0c96fe 100644
--- a/src/core/services/anki-jimaku.ts
+++ b/src/core/services/anki-jimaku.ts
@@ -23,7 +23,9 @@ interface MpvClientLike {
 }
 
 interface RuntimeOptionsManagerLike {
-  getEffectiveAnkiConnectConfig: (config?: AnkiConnectConfig) => AnkiConnectConfig;
+  getEffectiveAnkiConnectConfig: (
+    config?: AnkiConnectConfig,
+  ) => AnkiConnectConfig;
 }
 
 interface SubtitleTimingTrackerLike {
@@ -39,13 +41,20 @@ export interface AnkiJimakuIpcRuntimeOptions {
   getAnkiIntegration: () => AnkiIntegration | null;
   setAnkiIntegration: (integration: AnkiIntegration | null) => void;
   getKnownWordCacheStatePath: () => string;
-  showDesktopNotification: (title: string, options: { body?: string; icon?: string }) => void;
+  showDesktopNotification: (
+    title: string,
+    options: { body?: string; icon?: string },
+  ) => void;
   createFieldGroupingCallback: () => (
     data: KikuFieldGroupingRequestData,
   ) => Promise<KikuFieldGroupingChoice>;
   broadcastRuntimeOptionsChanged: () => void;
-  getFieldGroupingResolver: () => ((choice: KikuFieldGroupingChoice) => void) | null;
-  setFieldGroupingResolver: (resolver: ((choice: KikuFieldGroupingChoice) => void) | null) => void;
+  getFieldGroupingResolver: () =>
+    | ((choice: KikuFieldGroupingChoice) => void)
+    | null;
+  setFieldGroupingResolver: (
+    resolver: ((choice: KikuFieldGroupingChoice) => void) | null,
+  ) => void;
   parseMediaInfo: (mediaPath: string | null) => JimakuMediaInfo;
   getCurrentMediaPath: () => string | null;
   jimakuFetchJson: <T>(
@@ -60,7 +69,13 @@ export interface AnkiJimakuIpcRuntimeOptions {
     url: string,
     destPath: string,
     headers: Record<string, string>,
-  ) => Promise<{ ok: true; path: string } | { ok: false; error: { error: string; code?: number; retryAfter?: number } }>;
+  ) => Promise<
+    | { ok: true; path: string }
+    | {
+        ok: false;
+        error: { error: string; code?: number; retryAfter?: number };
+      }
+  >;
 }
 
 const logger = createLogger("main:anki-jimaku");
@@ -80,7 +95,9 @@ export function registerAnkiJimakuIpcRuntime(
       if (enabled && !ankiIntegration && subtitleTimingTracker && mpvClient) {
         const runtimeOptionsManager = options.getRuntimeOptionsManager();
         const effectiveAnkiConfig = runtimeOptionsManager
-          ? runtimeOptionsManager.getEffectiveAnkiConnectConfig(config.ankiConnect)
+          ? runtimeOptionsManager.getEffectiveAnkiConnectConfig(
+              config.ankiConnect,
+            )
           : config.ankiConnect;
         const integration = new AnkiIntegration(
           effectiveAnkiConfig as never,
@@ -140,7 +157,8 @@ export function registerAnkiJimakuIpcRuntime(
         request.deleteDuplicate,
       );
     },
-    getJimakuMediaInfo: () => options.parseMediaInfo(options.getCurrentMediaPath()),
+    getJimakuMediaInfo: () =>
+      options.parseMediaInfo(options.getCurrentMediaPath()),
     searchJimakuEntries: async (query) => {
       logger.info(`[jimaku] search-entries query: "${query.query}"`);
       const response = await options.jimakuFetchJson<JimakuEntry[]>(
diff --git a/src/core/services/app-lifecycle.ts b/src/core/services/app-lifecycle.ts
index 2e69871..7cf156b 100644
--- a/src/core/services/app-lifecycle.ts
+++ b/src/core/services/app-lifecycle.ts
@@ -8,7 +8,9 @@ export interface AppLifecycleServiceDeps {
   parseArgs: (argv: string[]) => CliArgs;
   requestSingleInstanceLock: () => boolean;
   quitApp: () => void;
-  onSecondInstance: (handler: (_event: unknown, argv: string[]) => void) => void;
+  onSecondInstance: (
+    handler: (_event: unknown, argv: string[]) => void,
+  ) => void;
   handleCliCommand: (args: CliArgs, source: CliCommandSource) => void;
   printHelp: () => void;
   logNoRunningInstance: () => void;
@@ -53,18 +55,27 @@ export function createAppLifecycleDepsRuntime(
     requestSingleInstanceLock: () => options.app.requestSingleInstanceLock(),
     quitApp: () => options.app.quit(),
     onSecondInstance: (handler) => {
-      options.app.on("second-instance", handler as (...args: unknown[]) => void);
+      options.app.on(
+        "second-instance",
+        handler as (...args: unknown[]) => void,
+      );
     },
     handleCliCommand: options.handleCliCommand,
     printHelp: options.printHelp,
     logNoRunningInstance: options.logNoRunningInstance,
     whenReady: (handler) => {
-      options.app.whenReady().then(handler).catch((error) => {
-        logger.error("App ready handler failed:", error);
-      });
+      options.app
+        .whenReady()
+        .then(handler)
+        .catch((error) => {
+          logger.error("App ready handler failed:", error);
+        });
     },
     onWindowAllClosed: (handler) => {
-      options.app.on("window-all-closed", handler as (...args: unknown[]) => void);
+      options.app.on(
+        "window-all-closed",
+        handler as (...args: unknown[]) => void,
+      );
     },
     onWillQuit: (handler) => {
       options.app.on("will-quit", handler as (...args: unknown[]) => void);
diff --git a/src/core/services/app-ready.test.ts b/src/core/services/app-ready.test.ts
index 3fee8e1..6df253a 100644
--- a/src/core/services/app-ready.test.ts
+++ b/src/core/services/app-ready.test.ts
@@ -9,22 +9,31 @@ function makeDeps(overrides: Partial<AppReadyRuntimeDeps> = {}) {
     resolveKeybindings: () => calls.push("resolveKeybindings"),
     createMpvClient: () => calls.push("createMpvClient"),
     reloadConfig: () => calls.push("reloadConfig"),
-    getResolvedConfig: () => ({ websocket: { enabled: "auto" }, secondarySub: {} }),
+    getResolvedConfig: () => ({
+      websocket: { enabled: "auto" },
+      secondarySub: {},
+    }),
     getConfigWarnings: () => [],
     logConfigWarning: () => calls.push("logConfigWarning"),
-    setLogLevel: (level, source) => calls.push(`setLogLevel:${level}:${source}`),
+    setLogLevel: (level, source) =>
+      calls.push(`setLogLevel:${level}:${source}`),
     initRuntimeOptionsManager: () => calls.push("initRuntimeOptionsManager"),
     setSecondarySubMode: (mode) => calls.push(`setSecondarySubMode:${mode}`),
     defaultSecondarySubMode: "hover",
     defaultWebsocketPort: 9001,
     hasMpvWebsocketPlugin: () => true,
-    startSubtitleWebsocket: (port) => calls.push(`startSubtitleWebsocket:${port}`),
+    startSubtitleWebsocket: (port) =>
+      calls.push(`startSubtitleWebsocket:${port}`),
     log: (message) => calls.push(`log:${message}`),
     createMecabTokenizerAndCheck: async () => {
       calls.push("createMecabTokenizerAndCheck");
     },
-    createSubtitleTimingTracker: () => calls.push("createSubtitleTimingTracker"),
+    createSubtitleTimingTracker: () =>
+      calls.push("createSubtitleTimingTracker"),
     createImmersionTracker: () => calls.push("createImmersionTracker"),
+    startJellyfinRemoteSession: async () => {
+      calls.push("startJellyfinRemoteSession");
+    },
     loadYomitanExtension: async () => {
       calls.push("loadYomitanExtension");
     },
@@ -45,16 +54,37 @@ test("runAppReadyRuntime starts websocket in auto mode when plugin missing", asy
   assert.ok(calls.includes("startSubtitleWebsocket:9001"));
   assert.ok(calls.includes("initializeOverlayRuntime"));
   assert.ok(calls.includes("createImmersionTracker"));
+  assert.ok(calls.includes("startJellyfinRemoteSession"));
   assert.ok(
     calls.includes("log:Runtime ready: invoking createImmersionTracker."),
   );
 });
 
-test("runAppReadyRuntimeService logs when createImmersionTracker dependency is missing", async () => {
+test("runAppReadyRuntime skips Jellyfin remote startup when dependency is not wired", async () => {
+  const { deps, calls } = makeDeps({
+    startJellyfinRemoteSession: undefined,
+  });
+
+  await runAppReadyRuntime(deps);
+
+  assert.equal(calls.includes("startJellyfinRemoteSession"), false);
+  assert.ok(calls.includes("createMecabTokenizerAndCheck"));
+  assert.ok(calls.includes("createMpvClient"));
+  assert.ok(calls.includes("createSubtitleTimingTracker"));
+  assert.ok(calls.includes("handleInitialArgs"));
+  assert.ok(
+    calls.includes("initializeOverlayRuntime") ||
+      calls.includes(
+        "log:Overlay runtime deferred: waiting for explicit overlay command.",
+      ),
+  );
+});
+
+test("runAppReadyRuntime logs when createImmersionTracker dependency is missing", async () => {
   const { deps, calls } = makeDeps({
     createImmersionTracker: undefined,
   });
-  await runAppReadyRuntimeService(deps);
+  await runAppReadyRuntime(deps);
   assert.ok(
     calls.includes(
       "log:Runtime ready: createImmersionTracker dependency is missing.",
@@ -62,14 +92,14 @@ test("runAppReadyRuntimeService logs when createImmersionTracker dependency is m
   );
 });
 
-test("runAppReadyRuntimeService logs and continues when createImmersionTracker throws", async () => {
+test("runAppReadyRuntime logs and continues when createImmersionTracker throws", async () => {
   const { deps, calls } = makeDeps({
     createImmersionTracker: () => {
       calls.push("createImmersionTracker");
       throw new Error("immersion init failed");
     },
   });
-  await runAppReadyRuntimeService(deps);
+  await runAppReadyRuntime(deps);
   assert.ok(calls.includes("createImmersionTracker"));
   assert.ok(
     calls.includes(
diff --git a/src/core/services/field-grouping-overlay.test.ts b/src/core/services/field-grouping-overlay.test.ts
index 0349215..9e8b2f9 100644
--- a/src/core/services/field-grouping-overlay.test.ts
+++ b/src/core/services/field-grouping-overlay.test.ts
@@ -8,8 +8,9 @@ test("createFieldGroupingOverlayRuntime sends overlay messages and sets restore
   let visible = false;
   const restore = new Set<"runtime-options" | "subsync">();
 
-  const runtime =
-    createFieldGroupingOverlayRuntime<"runtime-options" | "subsync">({
+  const runtime = createFieldGroupingOverlayRuntime<
+    "runtime-options" | "subsync"
+  >({
     getMainWindow: () => ({
       isDestroyed: () => false,
       webContents: {
@@ -28,7 +29,7 @@ test("createFieldGroupingOverlayRuntime sends overlay messages and sets restore
     getResolver: () => null,
     setResolver: () => {},
     getRestoreVisibleOverlayOnModalClose: () => restore,
-    });
+  });
 
   const ok = runtime.sendToVisibleOverlay("runtime-options:open", undefined, {
     restoreOnModalClose: "runtime-options",
@@ -42,20 +43,21 @@ test("createFieldGroupingOverlayRuntime sends overlay messages and sets restore
 
 test("createFieldGroupingOverlayRuntime callback cancels when send fails", async () => {
   let resolver: ((choice: KikuFieldGroupingChoice) => void) | null = null;
-  const runtime =
-    createFieldGroupingOverlayRuntime<"runtime-options" | "subsync">({
-      getMainWindow: () => null,
-      getVisibleOverlayVisible: () => false,
-      getInvisibleOverlayVisible: () => false,
-      setVisibleOverlayVisible: () => {},
-      setInvisibleOverlayVisible: () => {},
-      getResolver: () => resolver,
-      setResolver: (next) => {
-        resolver = next;
-      },
-      getRestoreVisibleOverlayOnModalClose: () =>
-        new Set<"runtime-options" | "subsync">(),
-    });
+  const runtime = createFieldGroupingOverlayRuntime<
+    "runtime-options" | "subsync"
+  >({
+    getMainWindow: () => null,
+    getVisibleOverlayVisible: () => false,
+    getInvisibleOverlayVisible: () => false,
+    setVisibleOverlayVisible: () => {},
+    setInvisibleOverlayVisible: () => {},
+    getResolver: () => resolver,
+    setResolver: (next) => {
+      resolver = next;
+    },
+    getRestoreVisibleOverlayOnModalClose: () =>
+      new Set<"runtime-options" | "subsync">(),
+  });
 
   const callback = runtime.createFieldGroupingCallback();
   const result = await callback({
diff --git a/src/core/services/field-grouping.ts b/src/core/services/field-grouping.ts
index f88bc3f..9c97caf 100644
--- a/src/core/services/field-grouping.ts
+++ b/src/core/services/field-grouping.ts
@@ -9,7 +9,9 @@ export function createFieldGroupingCallback(options: {
   setVisibleOverlayVisible: (visible: boolean) => void;
   setInvisibleOverlayVisible: (visible: boolean) => void;
   getResolver: () => ((choice: KikuFieldGroupingChoice) => void) | null;
-  setResolver: (resolver: ((choice: KikuFieldGroupingChoice) => void) | null) => void;
+  setResolver: (
+    resolver: ((choice: KikuFieldGroupingChoice) => void) | null,
+  ) => void;
   sendRequestToVisibleOverlay: (data: KikuFieldGroupingRequestData) => boolean;
 }): (data: KikuFieldGroupingRequestData) => Promise<KikuFieldGroupingChoice> {
   return async (
diff --git a/src/core/services/frequency-dictionary.test.ts b/src/core/services/frequency-dictionary.test.ts
index 8f789d4..08a7227 100644
--- a/src/core/services/frequency-dictionary.test.ts
+++ b/src/core/services/frequency-dictionary.test.ts
@@ -8,7 +8,9 @@ import { createFrequencyDictionaryLookup } from "./frequency-dictionary";
 
 test("createFrequencyDictionaryLookup logs parse errors and returns no-op for invalid dictionaries", async () => {
   const logs: string[] = [];
-  const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), "subminer-frequency-dict-"));
+  const tempDir = fs.mkdtempSync(
+    path.join(os.tmpdir(), "subminer-frequency-dict-"),
+  );
   const bankPath = path.join(tempDir, "term_meta_bank_1.json");
   fs.writeFileSync(bankPath, "{ invalid json");
 
@@ -23,9 +25,10 @@ test("createFrequencyDictionaryLookup logs parse errors and returns no-op for in
 
   assert.equal(rank, null);
   assert.equal(
-    logs.some((entry) =>
-      entry.includes("Failed to parse frequency dictionary file as JSON") &&
-      entry.includes("term_meta_bank_1.json")
+    logs.some(
+      (entry) =>
+        entry.includes("Failed to parse frequency dictionary file as JSON") &&
+        entry.includes("term_meta_bank_1.json"),
     ),
     true,
   );
@@ -33,7 +36,10 @@ test("createFrequencyDictionaryLookup logs parse errors and returns no-op for in
 
 test("createFrequencyDictionaryLookup continues with no-op lookup when search path is missing", async () => {
   const logs: string[] = [];
-  const missingPath = path.join(os.tmpdir(), "subminer-frequency-dict-missing-dir");
+  const missingPath = path.join(
+    os.tmpdir(),
+    "subminer-frequency-dict-missing-dir",
+  );
   const lookup = await createFrequencyDictionaryLookup({
     searchPaths: [missingPath],
     log: (message) => {
diff --git a/src/core/services/frequency-dictionary.ts b/src/core/services/frequency-dictionary.ts
index acedfac..eed0702 100644
--- a/src/core/services/frequency-dictionary.ts
+++ b/src/core/services/frequency-dictionary.ts
@@ -44,11 +44,7 @@ function asFrequencyDictionaryEntry(
     return null;
   }
 
-  const [term, _id, meta] = entry as [
-    unknown,
-    unknown,
-    unknown,
-  ];
+  const [term, _id, meta] = entry as [unknown, unknown, unknown];
   if (typeof term !== "string") {
     return null;
   }
diff --git a/src/core/services/immersion-tracker-service.test.ts b/src/core/services/immersion-tracker-service.test.ts
index 37c7062..d2430bb 100644
--- a/src/core/services/immersion-tracker-service.test.ts
+++ b/src/core/services/immersion-tracker-service.test.ts
@@ -3,11 +3,36 @@ import assert from "node:assert/strict";
 import fs from "node:fs";
 import os from "node:os";
 import path from "node:path";
-import { DatabaseSync } from "node:sqlite";
-import { ImmersionTrackerService } from "./immersion-tracker-service";
+import type { DatabaseSync as NodeDatabaseSync } from "node:sqlite";
+
+type ImmersionTrackerService = import("./immersion-tracker-service").ImmersionTrackerService;
+type ImmersionTrackerServiceCtor = typeof import("./immersion-tracker-service").ImmersionTrackerService;
+
+type DatabaseSyncCtor = typeof NodeDatabaseSync;
+const DatabaseSync: DatabaseSyncCtor | null = (() => {
+  try {
+    return (
+      require("node:sqlite") as { DatabaseSync?: DatabaseSyncCtor }
+    ).DatabaseSync ?? null;
+  } catch {
+    return null;
+  }
+})();
+const testIfSqlite = DatabaseSync ? test : test.skip;
+
+let trackerCtor: ImmersionTrackerServiceCtor | null = null;
+
+async function loadTrackerCtor(): Promise<ImmersionTrackerServiceCtor> {
+  if (trackerCtor) return trackerCtor;
+  const mod = await import("./immersion-tracker-service");
+  trackerCtor = mod.ImmersionTrackerService;
+  return trackerCtor;
+}
 
 function makeDbPath(): string {
-  const dir = fs.mkdtempSync(path.join(os.tmpdir(), "subminer-immersion-test-"));
+  const dir = fs.mkdtempSync(
+    path.join(os.tmpdir(), "subminer-immersion-test-"),
+  );
   return path.join(dir, "immersion.sqlite");
 }
 
@@ -18,12 +43,13 @@ function cleanupDbPath(dbPath: string): void {
   }
 }
 
-test("startSession generates UUID-like session identifiers", () => {
+testIfSqlite("startSession generates UUID-like session identifiers", async () => {
   const dbPath = makeDbPath();
   let tracker: ImmersionTrackerService | null = null;
 
   try {
-    tracker = new ImmersionTrackerService({ dbPath });
+    const Ctor = await loadTrackerCtor();
+    tracker = new Ctor({ dbPath });
     tracker.handleMediaChange("/tmp/episode.mkv", "Episode");
 
     const privateApi = tracker as unknown as {
@@ -33,7 +59,7 @@ test("startSession generates UUID-like session identifiers", () => {
     privateApi.flushTelemetry(true);
     privateApi.flushNow();
 
-    const db = new DatabaseSync(dbPath);
+    const db = new DatabaseSync!(dbPath);
     const row = db
       .prepare("SELECT session_uuid FROM imm_sessions LIMIT 1")
       .get() as { session_uuid: string } | null;
@@ -48,18 +74,19 @@ test("startSession generates UUID-like session identifiers", () => {
   }
 });
 
-test("destroy finalizes active session and persists final telemetry", () => {
+testIfSqlite("destroy finalizes active session and persists final telemetry", async () => {
   const dbPath = makeDbPath();
   let tracker: ImmersionTrackerService | null = null;
 
   try {
-    tracker = new ImmersionTrackerService({ dbPath });
+    const Ctor = await loadTrackerCtor();
+    tracker = new Ctor({ dbPath });
 
     tracker.handleMediaChange("/tmp/episode-2.mkv", "Episode 2");
     tracker.recordSubtitleLine("Hello immersion", 0, 1);
     tracker.destroy();
 
-    const db = new DatabaseSync(dbPath);
+    const db = new DatabaseSync!(dbPath);
     const sessionRow = db
       .prepare("SELECT ended_at_ms FROM imm_sessions LIMIT 1")
       .get() as { ended_at_ms: number | null } | null;
@@ -77,14 +104,137 @@ test("destroy finalizes active session and persists final telemetry", () => {
   }
 });
 
-test("monthly rollups are grouped by calendar month", async () => {
+testIfSqlite("persists and retrieves minimum immersion tracking fields", async () => {
   const dbPath = makeDbPath();
   let tracker: ImmersionTrackerService | null = null;
 
   try {
-    tracker = new ImmersionTrackerService({ dbPath });
+    const Ctor = await loadTrackerCtor();
+    tracker = new Ctor({ dbPath });
+
+    tracker.handleMediaChange("/tmp/episode-3.mkv", "Episode 3");
+    tracker.recordSubtitleLine("alpha beta", 0, 1.2);
+    tracker.recordCardsMined(2);
+    tracker.recordLookup(true);
+    tracker.recordPlaybackPosition(12.5);
+
     const privateApi = tracker as unknown as {
-      db: DatabaseSync;
+      flushTelemetry: (force?: boolean) => void;
+      flushNow: () => void;
+    };
+    privateApi.flushTelemetry(true);
+    privateApi.flushNow();
+
+    const summaries = await tracker.getSessionSummaries(10);
+    assert.ok(summaries.length >= 1);
+    assert.ok(summaries[0].linesSeen >= 1);
+    assert.ok(summaries[0].cardsMined >= 2);
+
+    tracker.destroy();
+
+    const db = new DatabaseSync!(dbPath);
+    const videoRow = db
+      .prepare(
+        "SELECT canonical_title, source_path, duration_ms FROM imm_videos LIMIT 1",
+      )
+      .get() as {
+      canonical_title: string;
+      source_path: string | null;
+      duration_ms: number;
+    } | null;
+    const telemetryRow = db
+      .prepare(
+        `SELECT lines_seen, words_seen, tokens_seen, cards_mined
+         FROM imm_session_telemetry
+         ORDER BY sample_ms DESC
+         LIMIT 1`,
+      )
+      .get() as {
+      lines_seen: number;
+      words_seen: number;
+      tokens_seen: number;
+      cards_mined: number;
+    } | null;
+    db.close();
+
+    assert.ok(videoRow);
+    assert.equal(videoRow?.canonical_title, "Episode 3");
+    assert.equal(videoRow?.source_path, "/tmp/episode-3.mkv");
+    assert.ok(Number(videoRow?.duration_ms ?? -1) >= 0);
+
+    assert.ok(telemetryRow);
+    assert.ok(Number(telemetryRow?.lines_seen ?? 0) >= 1);
+    assert.ok(Number(telemetryRow?.words_seen ?? 0) >= 2);
+    assert.ok(Number(telemetryRow?.tokens_seen ?? 0) >= 2);
+    assert.ok(Number(telemetryRow?.cards_mined ?? 0) >= 2);
+  } finally {
+    tracker?.destroy();
+    cleanupDbPath(dbPath);
+  }
+});
+
+testIfSqlite("applies configurable queue, flush, and retention policy", async () => {
+  const dbPath = makeDbPath();
+  let tracker: ImmersionTrackerService | null = null;
+
+  try {
+    const Ctor = await loadTrackerCtor();
+    tracker = new Ctor({
+      dbPath,
+      policy: {
+        batchSize: 10,
+        flushIntervalMs: 250,
+        queueCap: 1500,
+        payloadCapBytes: 512,
+        maintenanceIntervalMs: 2 * 60 * 60 * 1000,
+        retention: {
+          eventsDays: 14,
+          telemetryDays: 45,
+          dailyRollupsDays: 730,
+          monthlyRollupsDays: 3650,
+          vacuumIntervalDays: 14,
+        },
+      },
+    });
+
+    const privateApi = tracker as unknown as {
+      batchSize: number;
+      flushIntervalMs: number;
+      queueCap: number;
+      maxPayloadBytes: number;
+      maintenanceIntervalMs: number;
+      eventsRetentionMs: number;
+      telemetryRetentionMs: number;
+      dailyRollupRetentionMs: number;
+      monthlyRollupRetentionMs: number;
+      vacuumIntervalMs: number;
+    };
+
+    assert.equal(privateApi.batchSize, 10);
+    assert.equal(privateApi.flushIntervalMs, 250);
+    assert.equal(privateApi.queueCap, 1500);
+    assert.equal(privateApi.maxPayloadBytes, 512);
+    assert.equal(privateApi.maintenanceIntervalMs, 7_200_000);
+    assert.equal(privateApi.eventsRetentionMs, 14 * 86_400_000);
+    assert.equal(privateApi.telemetryRetentionMs, 45 * 86_400_000);
+    assert.equal(privateApi.dailyRollupRetentionMs, 730 * 86_400_000);
+    assert.equal(privateApi.monthlyRollupRetentionMs, 3650 * 86_400_000);
+    assert.equal(privateApi.vacuumIntervalMs, 14 * 86_400_000);
+  } finally {
+    tracker?.destroy();
+    cleanupDbPath(dbPath);
+  }
+});
+
+testIfSqlite("monthly rollups are grouped by calendar month", async () => {
+  const dbPath = makeDbPath();
+  let tracker: ImmersionTrackerService | null = null;
+
+  try {
+    const Ctor = await loadTrackerCtor();
+    tracker = new Ctor({ dbPath });
+    const privateApi = tracker as unknown as {
+      db: NodeDatabaseSync;
       runRollupMaintenance: () => void;
     };
 
@@ -239,15 +389,16 @@ test("monthly rollups are grouped by calendar month", async () => {
   }
 });
 
-test("flushSingle reuses cached prepared statements", () => {
+testIfSqlite("flushSingle reuses cached prepared statements", async () => {
   const dbPath = makeDbPath();
   let tracker: ImmersionTrackerService | null = null;
-  let originalPrepare: DatabaseSync["prepare"] | null = null;
+  let originalPrepare: NodeDatabaseSync["prepare"] | null = null;
 
   try {
-    tracker = new ImmersionTrackerService({ dbPath });
+    const Ctor = await loadTrackerCtor();
+    tracker = new Ctor({ dbPath });
     const privateApi = tracker as unknown as {
-      db: DatabaseSync;
+      db: NodeDatabaseSync;
       flushSingle: (write: {
         kind: "telemetry" | "event";
         sessionId: number;
@@ -277,7 +428,7 @@ test("flushSingle reuses cached prepared statements", () => {
 
     originalPrepare = privateApi.db.prepare;
     let prepareCalls = 0;
-    privateApi.db.prepare = (...args: Parameters<DatabaseSync["prepare"]>) => {
+    privateApi.db.prepare = (...args: Parameters<NodeDatabaseSync["prepare"]>) => {
       prepareCalls += 1;
       return originalPrepare!.apply(privateApi.db, args);
     };
@@ -362,7 +513,7 @@ test("flushSingle reuses cached prepared statements", () => {
     assert.equal(prepareCalls, 0);
   } finally {
     if (tracker && originalPrepare) {
-      const privateApi = tracker as unknown as { db: DatabaseSync };
+      const privateApi = tracker as unknown as { db: NodeDatabaseSync };
       privateApi.db.prepare = originalPrepare;
     }
     tracker?.destroy();
diff --git a/src/core/services/immersion-tracker-service.ts b/src/core/services/immersion-tracker-service.ts
index 3d7c74d..4ad0506 100644
--- a/src/core/services/immersion-tracker-service.ts
+++ b/src/core/services/immersion-tracker-service.ts
@@ -11,12 +11,12 @@ const DEFAULT_BATCH_SIZE = 25;
 const DEFAULT_FLUSH_INTERVAL_MS = 500;
 const DEFAULT_MAINTENANCE_INTERVAL_MS = 24 * 60 * 60 * 1000;
 const ONE_WEEK_MS = 7 * 24 * 60 * 60 * 1000;
-const EVENTS_RETENTION_MS = ONE_WEEK_MS;
-const VACUUM_INTERVAL_MS = ONE_WEEK_MS;
-const TELEMETRY_RETENTION_MS = 30 * 24 * 60 * 60 * 1000;
-const DAILY_ROLLUP_RETENTION_MS = 365 * 24 * 60 * 60 * 1000;
-const MONTHLY_ROLLUP_RETENTION_MS = 5 * 365 * 24 * 60 * 60 * 1000;
-const MAX_PAYLOAD_BYTES = 256;
+const DEFAULT_EVENTS_RETENTION_MS = ONE_WEEK_MS;
+const DEFAULT_VACUUM_INTERVAL_MS = ONE_WEEK_MS;
+const DEFAULT_TELEMETRY_RETENTION_MS = 30 * 24 * 60 * 60 * 1000;
+const DEFAULT_DAILY_ROLLUP_RETENTION_MS = 365 * 24 * 60 * 60 * 1000;
+const DEFAULT_MONTHLY_ROLLUP_RETENTION_MS = 5 * 365 * 24 * 60 * 60 * 1000;
+const DEFAULT_MAX_PAYLOAD_BYTES = 256;
 
 const SOURCE_TYPE_LOCAL = 1;
 const SOURCE_TYPE_REMOTE = 2;
@@ -35,6 +35,22 @@ const EVENT_PAUSE_END = 8;
 
 export interface ImmersionTrackerOptions {
   dbPath: string;
+  policy?: ImmersionTrackerPolicy;
+}
+
+export interface ImmersionTrackerPolicy {
+  queueCap?: number;
+  batchSize?: number;
+  flushIntervalMs?: number;
+  maintenanceIntervalMs?: number;
+  payloadCapBytes?: number;
+  retention?: {
+    eventsDays?: number;
+    telemetryDays?: number;
+    dailyRollupsDays?: number;
+    monthlyRollupsDays?: number;
+    vacuumIntervalDays?: number;
+  };
 }
 
 interface TelemetryAccumulator {
@@ -154,6 +170,12 @@ export class ImmersionTrackerService {
   private readonly batchSize: number;
   private readonly flushIntervalMs: number;
   private readonly maintenanceIntervalMs: number;
+  private readonly maxPayloadBytes: number;
+  private readonly eventsRetentionMs: number;
+  private readonly telemetryRetentionMs: number;
+  private readonly dailyRollupRetentionMs: number;
+  private readonly monthlyRollupRetentionMs: number;
+  private readonly vacuumIntervalMs: number;
   private readonly dbPath: string;
   private readonly writeLock = { locked: false };
   private flushTimer: ReturnType<typeof setTimeout> | null = null;
@@ -177,10 +199,69 @@ export class ImmersionTrackerService {
       fs.mkdirSync(parentDir, { recursive: true });
     }
 
-    this.queueCap = DEFAULT_QUEUE_CAP;
-    this.batchSize = DEFAULT_BATCH_SIZE;
-    this.flushIntervalMs = DEFAULT_FLUSH_INTERVAL_MS;
-    this.maintenanceIntervalMs = DEFAULT_MAINTENANCE_INTERVAL_MS;
+    const policy = options.policy ?? {};
+    this.queueCap = this.resolveBoundedInt(
+      policy.queueCap,
+      DEFAULT_QUEUE_CAP,
+      100,
+      100_000,
+    );
+    this.batchSize = this.resolveBoundedInt(
+      policy.batchSize,
+      DEFAULT_BATCH_SIZE,
+      1,
+      10_000,
+    );
+    this.flushIntervalMs = this.resolveBoundedInt(
+      policy.flushIntervalMs,
+      DEFAULT_FLUSH_INTERVAL_MS,
+      50,
+      60_000,
+    );
+    this.maintenanceIntervalMs = this.resolveBoundedInt(
+      policy.maintenanceIntervalMs,
+      DEFAULT_MAINTENANCE_INTERVAL_MS,
+      60_000,
+      7 * 24 * 60 * 60 * 1000,
+    );
+    this.maxPayloadBytes = this.resolveBoundedInt(
+      policy.payloadCapBytes,
+      DEFAULT_MAX_PAYLOAD_BYTES,
+      64,
+      8192,
+    );
+
+    const retention = policy.retention ?? {};
+    this.eventsRetentionMs = this.resolveBoundedInt(
+      retention.eventsDays,
+      Math.floor(DEFAULT_EVENTS_RETENTION_MS / 86_400_000),
+      1,
+      3650,
+    ) * 86_400_000;
+    this.telemetryRetentionMs = this.resolveBoundedInt(
+      retention.telemetryDays,
+      Math.floor(DEFAULT_TELEMETRY_RETENTION_MS / 86_400_000),
+      1,
+      3650,
+    ) * 86_400_000;
+    this.dailyRollupRetentionMs = this.resolveBoundedInt(
+      retention.dailyRollupsDays,
+      Math.floor(DEFAULT_DAILY_ROLLUP_RETENTION_MS / 86_400_000),
+      1,
+      36500,
+    ) * 86_400_000;
+    this.monthlyRollupRetentionMs = this.resolveBoundedInt(
+      retention.monthlyRollupsDays,
+      Math.floor(DEFAULT_MONTHLY_ROLLUP_RETENTION_MS / 86_400_000),
+      1,
+      36500,
+    ) * 86_400_000;
+    this.vacuumIntervalMs = this.resolveBoundedInt(
+      retention.vacuumIntervalDays,
+      Math.floor(DEFAULT_VACUUM_INTERVAL_MS / 86_400_000),
+      1,
+      3650,
+    ) * 86_400_000;
     this.lastMaintenanceMs = Date.now();
 
     this.db = new DatabaseSync(this.dbPath);
@@ -223,9 +304,7 @@ export class ImmersionTrackerService {
     this.db.close();
   }
 
-  async getSessionSummaries(
-    limit = 50,
-  ): Promise<SessionSummaryQueryRow[]> {
+  async getSessionSummaries(limit = 50): Promise<SessionSummaryQueryRow[]> {
     const prepared = this.db.prepare(`
       SELECT
         s.video_id AS videoId,
@@ -273,7 +352,9 @@ export class ImmersionTrackerService {
     totalSessions: number;
     activeSessions: number;
   }> {
-    const sessions = this.db.prepare("SELECT COUNT(*) AS total FROM imm_sessions");
+    const sessions = this.db.prepare(
+      "SELECT COUNT(*) AS total FROM imm_sessions",
+    );
     const active = this.db.prepare(
       "SELECT COUNT(*) AS total FROM imm_sessions WHERE ended_at_ms IS NULL",
     );
@@ -282,9 +363,7 @@ export class ImmersionTrackerService {
     return { totalSessions, activeSessions };
   }
 
-  async getDailyRollups(
-    limit = 60,
-  ): Promise<ImmersionSessionRollupRow[]> {
+  async getDailyRollups(limit = 60): Promise<ImmersionSessionRollupRow[]> {
     const prepared = this.db.prepare(`
       SELECT
         rollup_day AS rollupDayOrMonth,
@@ -305,9 +384,7 @@ export class ImmersionTrackerService {
     return prepared.all(limit) as unknown as ImmersionSessionRollupRow[];
   }
 
-  async getMonthlyRollups(
-    limit = 24,
-  ): Promise<ImmersionSessionRollupRow[]> {
+  async getMonthlyRollups(limit = 24): Promise<ImmersionSessionRollupRow[]> {
     const prepared = this.db.prepare(`
       SELECT
         rollup_month AS rollupDayOrMonth,
@@ -352,9 +429,12 @@ export class ImmersionTrackerService {
       return;
     }
 
-    const sourceType = this.isRemoteSource(normalizedPath) ? SOURCE_TYPE_REMOTE : SOURCE_TYPE_LOCAL;
+    const sourceType = this.isRemoteSource(normalizedPath)
+      ? SOURCE_TYPE_REMOTE
+      : SOURCE_TYPE_LOCAL;
     const videoKey = this.buildVideoKey(normalizedPath, sourceType);
-    const canonicalTitle = normalizedTitle || this.deriveCanonicalTitle(normalizedPath);
+    const canonicalTitle =
+      normalizedTitle || this.deriveCanonicalTitle(normalizedPath);
     const sourcePath = sourceType === SOURCE_TYPE_LOCAL ? normalizedPath : null;
     const sourceUrl = sourceType === SOURCE_TYPE_REMOTE ? normalizedPath : null;
 
@@ -372,7 +452,11 @@ export class ImmersionTrackerService {
       `Starting immersion session for path=${normalizedPath} videoId=${sessionInfo.videoId}`,
     );
     this.startSession(sessionInfo.videoId, sessionInfo.startedAtMs);
-    this.captureVideoMetadataAsync(sessionInfo.videoId, sourceType, normalizedPath);
+    this.captureVideoMetadataAsync(
+      sessionInfo.videoId,
+      sourceType,
+      normalizedPath,
+    );
   }
 
   handleMediaTitleUpdate(mediaTitle: string | null): void {
@@ -383,11 +467,7 @@ export class ImmersionTrackerService {
     this.updateVideoTitleForActiveSession(normalizedTitle);
   }
 
-  recordSubtitleLine(
-    text: string,
-    startSec: number,
-    endSec: number,
-  ): void {
+  recordSubtitleLine(text: string, startSec: number, endSec: number): void {
     if (!this.sessionState || !text.trim()) return;
     const cleaned = this.normalizeText(text);
     if (!cleaned) return;
@@ -418,7 +498,11 @@ export class ImmersionTrackerService {
   }
 
   recordPlaybackPosition(mediaTimeSec: number | null): void {
-    if (!this.sessionState || mediaTimeSec === null || !Number.isFinite(mediaTimeSec)) {
+    if (
+      !this.sessionState ||
+      mediaTimeSec === null ||
+      !Number.isFinite(mediaTimeSec)
+    ) {
       return;
     }
     const nowMs = Date.now();
@@ -637,7 +721,10 @@ export class ImmersionTrackerService {
       return;
     }
 
-    const batch = this.queue.splice(0, Math.min(this.batchSize, this.queue.length));
+    const batch = this.queue.splice(
+      0,
+      Math.min(this.batchSize, this.queue.length),
+    );
     this.writeLock.locked = true;
     try {
       this.db.exec("BEGIN IMMEDIATE");
@@ -648,7 +735,10 @@ export class ImmersionTrackerService {
     } catch (error) {
       this.db.exec("ROLLBACK");
       this.queue.unshift(...batch);
-      this.logger.warn("Immersion tracker flush failed, retrying later", error as Error);
+      this.logger.warn(
+        "Immersion tracker flush failed, retrying later",
+        error as Error,
+      );
     } finally {
       this.writeLock.locked = false;
       this.flushScheduled = false;
@@ -850,6 +940,18 @@ export class ImmersionTrackerService {
     `);
   }
 
+  private resolveBoundedInt(
+    value: number | undefined,
+    fallback: number,
+    min: number,
+    max: number,
+  ): number {
+    if (!Number.isFinite(value)) return fallback;
+    const candidate = Math.floor(value as number);
+    if (candidate < min || candidate > max) return fallback;
+    return candidate;
+  }
+
   private scheduleMaintenance(): void {
     this.maintenanceTimer = setInterval(() => {
       this.runMaintenance();
@@ -863,26 +965,33 @@ export class ImmersionTrackerService {
       this.flushTelemetry(true);
       this.flushNow();
       const nowMs = Date.now();
-      const eventCutoff = nowMs - EVENTS_RETENTION_MS;
-      const telemetryCutoff = nowMs - TELEMETRY_RETENTION_MS;
-      const dailyCutoff = nowMs - DAILY_ROLLUP_RETENTION_MS;
-      const monthlyCutoff = nowMs - MONTHLY_ROLLUP_RETENTION_MS;
+      const eventCutoff = nowMs - this.eventsRetentionMs;
+      const telemetryCutoff = nowMs - this.telemetryRetentionMs;
+      const dailyCutoff = nowMs - this.dailyRollupRetentionMs;
+      const monthlyCutoff = nowMs - this.monthlyRollupRetentionMs;
       const dayCutoff = Math.floor(dailyCutoff / 86_400_000);
       const monthCutoff = this.toMonthKey(monthlyCutoff);
 
-      this.db.prepare(`DELETE FROM imm_session_events WHERE ts_ms < ?`).run(eventCutoff);
-      this.db.prepare(`DELETE FROM imm_session_telemetry WHERE sample_ms < ?`).run(telemetryCutoff);
-      this.db.prepare(`DELETE FROM imm_daily_rollups WHERE rollup_day < ?`).run(dayCutoff);
-      this.db.prepare(`DELETE FROM imm_monthly_rollups WHERE rollup_month < ?`).run(monthCutoff);
       this.db
-        .prepare(`DELETE FROM imm_sessions WHERE ended_at_ms IS NOT NULL AND ended_at_ms < ?`)
+        .prepare(`DELETE FROM imm_session_events WHERE ts_ms < ?`)
+        .run(eventCutoff);
+      this.db
+        .prepare(`DELETE FROM imm_session_telemetry WHERE sample_ms < ?`)
+        .run(telemetryCutoff);
+      this.db
+        .prepare(`DELETE FROM imm_daily_rollups WHERE rollup_day < ?`)
+        .run(dayCutoff);
+      this.db
+        .prepare(`DELETE FROM imm_monthly_rollups WHERE rollup_month < ?`)
+        .run(monthCutoff);
+      this.db
+        .prepare(
+          `DELETE FROM imm_sessions WHERE ended_at_ms IS NOT NULL AND ended_at_ms < ?`,
+        )
         .run(telemetryCutoff);
       this.runRollupMaintenance();
 
-      if (
-        nowMs - this.lastVacuumMs >= VACUUM_INTERVAL_MS
-        && !this.writeLock.locked
-      ) {
+      if (nowMs - this.lastVacuumMs >= this.vacuumIntervalMs && !this.writeLock.locked) {
         this.db.exec("VACUUM");
         this.lastVacuumMs = nowMs;
       }
@@ -1007,16 +1116,21 @@ export class ImmersionTrackerService {
     this.scheduleFlush(0);
   }
 
-  private startSessionStatement(videoId: number, startedAtMs: number): {
+  private startSessionStatement(
+    videoId: number,
+    startedAtMs: number,
+  ): {
     lastInsertRowid: number | bigint;
   } {
     const sessionUuid = crypto.randomUUID();
     return this.db
-      .prepare(`
+      .prepare(
+        `
         INSERT INTO imm_sessions (
           session_uuid, video_id, started_at_ms, status, created_at_ms, updated_at_ms
         ) VALUES (?, ?, ?, ?, ?, ?)
-      `)
+      `,
+      )
       .run(
         sessionUuid,
         videoId,
@@ -1055,16 +1169,24 @@ export class ImmersionTrackerService {
       .prepare(
         "UPDATE imm_sessions SET ended_at_ms = ?, status = ?, updated_at_ms = ? WHERE session_id = ?",
       )
-      .run(endedAt, SESSION_STATUS_ENDED, Date.now(), this.sessionState.sessionId);
+      .run(
+        endedAt,
+        SESSION_STATUS_ENDED,
+        Date.now(),
+        this.sessionState.sessionId,
+      );
     this.sessionState = null;
   }
 
-  private getOrCreateVideo(videoKey: string, details: {
-    canonicalTitle: string;
-    sourcePath: string | null;
-    sourceUrl: string | null;
-    sourceType: number;
-  }): number {
+  private getOrCreateVideo(
+    videoKey: string,
+    details: {
+      canonicalTitle: string;
+      sourcePath: string | null;
+      sourceUrl: string | null;
+      sourceType: number;
+    },
+  ): number {
     const existing = this.db
       .prepare("SELECT video_id FROM imm_videos WHERE video_key = ?")
       .get(videoKey) as { video_id: number } | null;
@@ -1073,7 +1195,11 @@ export class ImmersionTrackerService {
         .prepare(
           "UPDATE imm_videos SET canonical_title = ?, updated_at_ms = ? WHERE video_id = ?",
         )
-        .run(details.canonicalTitle || "unknown", Date.now(), existing.video_id);
+        .run(
+          details.canonicalTitle || "unknown",
+          Date.now(),
+          existing.video_id,
+        );
       return existing.video_id;
     }
 
@@ -1112,7 +1238,8 @@ export class ImmersionTrackerService {
 
   private updateVideoMetadata(videoId: number, metadata: VideoMetadata): void {
     this.db
-      .prepare(`
+      .prepare(
+        `
         UPDATE imm_videos
         SET
           duration_ms = ?,
@@ -1129,7 +1256,8 @@ export class ImmersionTrackerService {
           metadata_json = ?,
           updated_at_ms = ?
         WHERE video_id = ?
-      `)
+      `,
+      )
       .run(
         metadata.durationMs,
         metadata.fileSizeBytes,
@@ -1167,7 +1295,9 @@ export class ImmersionTrackerService {
     })();
   }
 
-  private async getLocalVideoMetadata(mediaPath: string): Promise<VideoMetadata> {
+  private async getLocalVideoMetadata(
+    mediaPath: string,
+  ): Promise<VideoMetadata> {
     const hash = await this.computeSha256(mediaPath);
     const info = await this.runFfprobe(mediaPath);
     const stat = await fs.promises.stat(mediaPath);
@@ -1342,14 +1472,17 @@ export class ImmersionTrackerService {
 
   private sanitizePayload(payload: Record<string, unknown>): string {
     const json = JSON.stringify(payload);
-    return json.length <= MAX_PAYLOAD_BYTES
+    return json.length <= this.maxPayloadBytes
       ? json
       : JSON.stringify({ truncated: true });
   }
 
-  private calculateTextMetrics(value: string): { words: number; tokens: number } {
+  private calculateTextMetrics(value: string): {
+    words: number;
+    tokens: number;
+  } {
     const words = value.split(/\s+/).filter(Boolean).length;
-    const cjkCount = (value.match(/[\u3040-\u30ff\u4e00-\u9fff]/g)?.length ?? 0);
+    const cjkCount = value.match(/[\u3040-\u30ff\u4e00-\u9fff]/g)?.length ?? 0;
     const tokens = Math.max(words, cjkCount);
     return { words, tokens };
   }
@@ -1401,7 +1534,8 @@ export class ImmersionTrackerService {
   }
 
   private toNullableInt(value: number | null | undefined): number | null {
-    if (value === null || value === undefined || !Number.isFinite(value)) return null;
+    if (value === null || value === undefined || !Number.isFinite(value))
+      return null;
     return value;
   }
 
diff --git a/src/core/services/ipc-command.ts b/src/core/services/ipc-command.ts
index 1c7b637..757a3c4 100644
--- a/src/core/services/ipc-command.ts
+++ b/src/core/services/ipc-command.ts
@@ -72,8 +72,12 @@ export async function runSubsyncManualFromIpc(
     isSubsyncInProgress: () => boolean;
     setSubsyncInProgress: (inProgress: boolean) => void;
     showMpvOsd: (text: string) => void;
-    runWithSpinner: (task: () => Promise<SubsyncResult>) => Promise<SubsyncResult>;
-    runSubsyncManual: (request: SubsyncManualRunRequest) => Promise<SubsyncResult>;
+    runWithSpinner: (
+      task: () => Promise<SubsyncResult>,
+    ) => Promise<SubsyncResult>;
+    runSubsyncManual: (
+      request: SubsyncManualRunRequest,
+    ) => Promise<SubsyncResult>;
   },
 ): Promise<SubsyncResult> {
   if (options.isSubsyncInProgress()) {
diff --git a/src/core/services/ipc.test.ts b/src/core/services/ipc.test.ts
index 5d4cef1..ec72f9a 100644
--- a/src/core/services/ipc.test.ts
+++ b/src/core/services/ipc.test.ts
@@ -55,6 +55,13 @@ test("createIpcDepsRuntime wires AniList handlers", async () => {
     ready: 0,
     deadLetter: 0,
   });
-  assert.deepEqual(await deps.retryAnilistQueueNow(), { ok: true, message: "done" });
-  assert.deepEqual(calls, ["clearAnilistToken", "openAnilistSetup", "retryAnilistQueueNow"]);
+  assert.deepEqual(await deps.retryAnilistQueueNow(), {
+    ok: true,
+    message: "done",
+  });
+  assert.deepEqual(calls, [
+    "clearAnilistToken",
+    "openAnilistSetup",
+    "retryAnilistQueueNow",
+  ]);
 });
diff --git a/src/core/services/ipc.ts b/src/core/services/ipc.ts
index f0fcb34..3333c0c 100644
--- a/src/core/services/ipc.ts
+++ b/src/core/services/ipc.ts
@@ -3,7 +3,10 @@ import { BrowserWindow, ipcMain, IpcMainEvent } from "electron";
 export interface IpcServiceDeps {
   getInvisibleWindow: () => WindowLike | null;
   isVisibleOverlayVisible: () => boolean;
-  setInvisibleIgnoreMouseEvents: (ignore: boolean, options?: { forward?: boolean }) => void;
+  setInvisibleIgnoreMouseEvents: (
+    ignore: boolean,
+    options?: { forward?: boolean },
+  ) => void;
   onOverlayModalClosed: (modal: string) => void;
   openYomitanSettings: () => void;
   quitApp: () => void;
@@ -17,7 +20,11 @@ export interface IpcServiceDeps {
   getSubtitlePosition: () => unknown;
   getSubtitleStyle: () => unknown;
   saveSubtitlePosition: (position: unknown) => void;
-  getMecabStatus: () => { available: boolean; enabled: boolean; path: string | null };
+  getMecabStatus: () => {
+    available: boolean;
+    enabled: boolean;
+    path: string | null;
+  };
   setMecabEnabled: (enabled: boolean) => void;
   handleMpvCommand: (command: Array<string | number>) => void;
   getKeybindings: () => unknown;
@@ -51,7 +58,11 @@ interface WindowLike {
 }
 
 interface MecabTokenizerLike {
-  getStatus: () => { available: boolean; enabled: boolean; path: string | null };
+  getStatus: () => {
+    available: boolean;
+    enabled: boolean;
+    path: string | null;
+  };
   setEnabled: (enabled: boolean) => void;
 }
 
@@ -235,9 +246,12 @@ export function registerIpcHandlers(deps: IpcServiceDeps): void {
     return deps.getSubtitleStyle();
   });
 
-  ipcMain.on("save-subtitle-position", (_event: IpcMainEvent, position: unknown) => {
-    deps.saveSubtitlePosition(position);
-  });
+  ipcMain.on(
+    "save-subtitle-position",
+    (_event: IpcMainEvent, position: unknown) => {
+      deps.saveSubtitlePosition(position);
+    },
+  );
 
   ipcMain.handle("get-mecab-status", () => {
     return deps.getMecabStatus();
@@ -247,9 +261,12 @@ export function registerIpcHandlers(deps: IpcServiceDeps): void {
     deps.setMecabEnabled(enabled);
   });
 
-  ipcMain.on("mpv-command", (_event: IpcMainEvent, command: (string | number)[]) => {
-    deps.handleMpvCommand(command);
-  });
+  ipcMain.on(
+    "mpv-command",
+    (_event: IpcMainEvent, command: (string | number)[]) => {
+      deps.handleMpvCommand(command);
+    },
+  );
 
   ipcMain.handle("get-keybindings", () => {
     return deps.getKeybindings();
@@ -283,17 +300,26 @@ export function registerIpcHandlers(deps: IpcServiceDeps): void {
     return deps.getRuntimeOptions();
   });
 
-  ipcMain.handle("runtime-options:set", (_event, id: string, value: unknown) => {
-    return deps.setRuntimeOption(id, value);
-  });
+  ipcMain.handle(
+    "runtime-options:set",
+    (_event, id: string, value: unknown) => {
+      return deps.setRuntimeOption(id, value);
+    },
+  );
 
-  ipcMain.handle("runtime-options:cycle", (_event, id: string, direction: 1 | -1) => {
-    return deps.cycleRuntimeOption(id, direction);
-  });
+  ipcMain.handle(
+    "runtime-options:cycle",
+    (_event, id: string, direction: 1 | -1) => {
+      return deps.cycleRuntimeOption(id, direction);
+    },
+  );
 
-  ipcMain.on("overlay-content-bounds:report", (_event: IpcMainEvent, payload: unknown) => {
-    deps.reportOverlayContentBounds(payload);
-  });
+  ipcMain.on(
+    "overlay-content-bounds:report",
+    (_event: IpcMainEvent, payload: unknown) => {
+      deps.reportOverlayContentBounds(payload);
+    },
+  );
 
   ipcMain.handle("anilist:get-status", () => {
     return deps.getAnilistStatus();
diff --git a/src/core/services/jlpt-token-filter.ts b/src/core/services/jlpt-token-filter.ts
index f340421..a38b63f 100644
--- a/src/core/services/jlpt-token-filter.ts
+++ b/src/core/services/jlpt-token-filter.ts
@@ -38,11 +38,13 @@ export function shouldIgnoreJlptByTerm(term: string): boolean {
 export const JLPT_IGNORED_MECAB_POS1_ENTRIES = [
   {
     pos1: "助詞",
-    reason: "Particles (ko/kara/nagara etc.): mostly grammatical glue, not independent vocabulary.",
+    reason:
+      "Particles (ko/kara/nagara etc.): mostly grammatical glue, not independent vocabulary.",
   },
   {
     pos1: "助動詞",
-    reason: "Auxiliary verbs (past tense, politeness, modality): grammar helpers.",
+    reason:
+      "Auxiliary verbs (past tense, politeness, modality): grammar helpers.",
   },
   {
     pos1: "記号",
@@ -54,7 +56,7 @@ export const JLPT_IGNORED_MECAB_POS1_ENTRIES = [
   },
   {
     pos1: "連体詞",
-    reason: "Adnominal forms (e.g. demonstratives like \"この\").",
+    reason: 'Adnominal forms (e.g. demonstratives like "この").',
   },
   {
     pos1: "感動詞",
@@ -62,7 +64,8 @@ export const JLPT_IGNORED_MECAB_POS1_ENTRIES = [
   },
   {
     pos1: "接続詞",
-    reason: "Conjunctions that connect clauses, usually not target vocab items.",
+    reason:
+      "Conjunctions that connect clauses, usually not target vocab items.",
   },
   {
     pos1: "接頭詞",
diff --git a/src/core/services/jlpt-vocab.ts b/src/core/services/jlpt-vocab.ts
index 52626c7..5013dbc 100644
--- a/src/core/services/jlpt-vocab.ts
+++ b/src/core/services/jlpt-vocab.ts
@@ -50,8 +50,7 @@ function addEntriesToMap(
     incomingLevel: JlptLevel,
   ): boolean =>
     existingLevel === undefined ||
-    JLPT_LEVEL_PRECEDENCE[incomingLevel] >
-      JLPT_LEVEL_PRECEDENCE[existingLevel];
+    JLPT_LEVEL_PRECEDENCE[incomingLevel] > JLPT_LEVEL_PRECEDENCE[existingLevel];
 
   if (!Array.isArray(rawEntries)) {
     return;
@@ -163,7 +162,7 @@ export async function createJlptVocabularyLookup(
       return (term: string): JlptLevel | null => {
         if (!term) return null;
         const normalized = normalizeJlptTerm(term);
-        return normalized ? terms.get(normalized) ?? null : null;
+        return normalized ? (terms.get(normalized) ?? null) : null;
       };
     }
 
@@ -181,7 +180,9 @@ export async function createJlptVocabularyLookup(
     );
   }
   if (resolvedBanks.length > 0 && foundBankCount > 0) {
-    options.log(`JLPT dictionary search matched path(s): ${resolvedBanks.join(", ")}`);
+    options.log(
+      `JLPT dictionary search matched path(s): ${resolvedBanks.join(", ")}`,
+    );
   }
   return NOOP_LOOKUP;
 }
diff --git a/src/core/services/mining.test.ts b/src/core/services/mining.test.ts
index fb416a4..3dfda4f 100644
--- a/src/core/services/mining.test.ts
+++ b/src/core/services/mining.test.ts
@@ -97,7 +97,12 @@ test("mineSentenceCard creates sentence card from mpv subtitle state", async ()
       updateLastAddedFromClipboard: async () => {},
       triggerFieldGroupingForLastAddedCard: async () => {},
       markLastCardAsAudioCard: async () => {},
-      createSentenceCard: async (sentence, startTime, endTime, secondarySub) => {
+      createSentenceCard: async (
+        sentence,
+        startTime,
+        endTime,
+        secondarySub,
+      ) => {
         created.push({ sentence, startTime, endTime, secondarySub });
         return true;
       },
@@ -176,7 +181,9 @@ test("handleMineSentenceDigit reports async create failures", async () => {
   assert.equal(logs.length, 1);
   assert.equal(logs[0]?.message, "mineSentenceMultiple failed:");
   assert.equal((logs[0]?.err as Error).message, "mine boom");
-  assert.ok(osd.some((entry) => entry.includes("Mine sentence failed: mine boom")));
+  assert.ok(
+    osd.some((entry) => entry.includes("Mine sentence failed: mine boom")),
+  );
   assert.equal(cardsMined, 0);
 });
 
diff --git a/src/core/services/mining.ts b/src/core/services/mining.ts
index 137e698..c7e4490 100644
--- a/src/core/services/mining.ts
+++ b/src/core/services/mining.ts
@@ -44,7 +44,9 @@ export function handleMultiCopyDigit(
   const actualCount = blocks.length;
   deps.writeClipboardText(blocks.join("\n\n"));
   if (actualCount < count) {
-    deps.showMpvOsd(`Only ${actualCount} lines available, copied ${actualCount}`);
+    deps.showMpvOsd(
+      `Only ${actualCount} lines available, copied ${actualCount}`,
+    );
   } else {
     deps.showMpvOsd(`Copied ${actualCount} lines`);
   }
diff --git a/src/core/services/mpv-render-metrics.ts b/src/core/services/mpv-render-metrics.ts
index 784880a..fea9e87 100644
--- a/src/core/services/mpv-render-metrics.ts
+++ b/src/core/services/mpv-render-metrics.ts
@@ -76,7 +76,10 @@ export function updateMpvSubtitleRenderMetrics(
       100,
     ),
     subAssOverride: asString(patch.subAssOverride, current.subAssOverride),
-    subScaleByWindow: asBoolean(patch.subScaleByWindow, current.subScaleByWindow),
+    subScaleByWindow: asBoolean(
+      patch.subScaleByWindow,
+      current.subScaleByWindow,
+    ),
     subUseMargins: asBoolean(patch.subUseMargins, current.subUseMargins),
     osdHeight: asFiniteNumber(patch.osdHeight, current.osdHeight, 1, 10000),
     osdDimensions: nextOsdDimensions,
@@ -104,6 +107,7 @@ export function applyMpvSubtitleRenderMetricsPatch(
     next.subScaleByWindow !== current.subScaleByWindow ||
     next.subUseMargins !== current.subUseMargins ||
     next.osdHeight !== current.osdHeight ||
-    JSON.stringify(next.osdDimensions) !== JSON.stringify(current.osdDimensions);
+    JSON.stringify(next.osdDimensions) !==
+      JSON.stringify(current.osdDimensions);
   return { next, changed };
 }
diff --git a/src/core/services/numeric-shortcut.ts b/src/core/services/numeric-shortcut.ts
index 2607f64..dee4f9b 100644
--- a/src/core/services/numeric-shortcut.ts
+++ b/src/core/services/numeric-shortcut.ts
@@ -41,7 +41,10 @@ export interface NumericShortcutSessionMessages {
 export interface NumericShortcutSessionDeps {
   registerShortcut: (accelerator: string, handler: () => void) => boolean;
   unregisterShortcut: (accelerator: string) => void;
-  setTimer: (handler: () => void, timeoutMs: number) => ReturnType<typeof setTimeout>;
+  setTimer: (
+    handler: () => void,
+    timeoutMs: number,
+  ) => ReturnType<typeof setTimeout>;
   clearTimer: (timer: ReturnType<typeof setTimeout>) => void;
   showMpvOsd: (text: string) => void;
 }
@@ -52,9 +55,7 @@ export interface NumericShortcutSessionStartParams {
   messages: NumericShortcutSessionMessages;
 }
 
-export function createNumericShortcutSession(
-  deps: NumericShortcutSessionDeps,
-) {
+export function createNumericShortcutSession(deps: NumericShortcutSessionDeps) {
   let active = false;
   let timeout: ReturnType<typeof setTimeout> | null = null;
   let digitShortcuts: string[] = [];
diff --git a/src/core/services/overlay-bridge.ts b/src/core/services/overlay-bridge.ts
index c6be82c..57b9480 100644
--- a/src/core/services/overlay-bridge.ts
+++ b/src/core/services/overlay-bridge.ts
@@ -45,23 +45,21 @@ export function sendToVisibleOverlayRuntime<T extends string>(options: {
   return true;
 }
 
-export function createFieldGroupingCallbackRuntime<T extends string>(
-  options: {
-    getVisibleOverlayVisible: () => boolean;
-    getInvisibleOverlayVisible: () => boolean;
-    setVisibleOverlayVisible: (visible: boolean) => void;
-    setInvisibleOverlayVisible: (visible: boolean) => void;
-    getResolver: () => ((choice: KikuFieldGroupingChoice) => void) | null;
-    setResolver: (
-      resolver: ((choice: KikuFieldGroupingChoice) => void) | null,
-    ) => void;
-    sendToVisibleOverlay: (
-      channel: string,
-      payload?: unknown,
-      runtimeOptions?: { restoreOnModalClose?: T },
-    ) => boolean;
-  },
-): (data: KikuFieldGroupingRequestData) => Promise<KikuFieldGroupingChoice> {
+export function createFieldGroupingCallbackRuntime<T extends string>(options: {
+  getVisibleOverlayVisible: () => boolean;
+  getInvisibleOverlayVisible: () => boolean;
+  setVisibleOverlayVisible: (visible: boolean) => void;
+  setInvisibleOverlayVisible: (visible: boolean) => void;
+  getResolver: () => ((choice: KikuFieldGroupingChoice) => void) | null;
+  setResolver: (
+    resolver: ((choice: KikuFieldGroupingChoice) => void) | null,
+  ) => void;
+  sendToVisibleOverlay: (
+    channel: string,
+    payload?: unknown,
+    runtimeOptions?: { restoreOnModalClose?: T },
+  ) => boolean;
+}): (data: KikuFieldGroupingRequestData) => Promise<KikuFieldGroupingChoice> {
   return createFieldGroupingCallback({
     getVisibleOverlayVisible: options.getVisibleOverlayVisible,
     getInvisibleOverlayVisible: options.getInvisibleOverlayVisible,
diff --git a/src/core/services/overlay-content-measurement.ts b/src/core/services/overlay-content-measurement.ts
index 265a047..2a4a78c 100644
--- a/src/core/services/overlay-content-measurement.ts
+++ b/src/core/services/overlay-content-measurement.ts
@@ -1,4 +1,8 @@
-import { OverlayContentMeasurement, OverlayContentRect, OverlayLayer } from "../../types";
+import {
+  OverlayContentMeasurement,
+  OverlayContentRect,
+  OverlayLayer,
+} from "../../types";
 import { createLogger } from "../../logger";
 
 const logger = createLogger("main:overlay-content-measurement");
@@ -8,7 +12,10 @@ const MAX_RECT_OFFSET = 50000;
 const MAX_FUTURE_TIMESTAMP_MS = 60_000;
 const INVALID_LOG_THROTTLE_MS = 10_000;
 
-type OverlayMeasurementStore = Record<OverlayLayer, OverlayContentMeasurement | null>;
+type OverlayMeasurementStore = Record<
+  OverlayLayer,
+  OverlayContentMeasurement | null
+>;
 
 export function sanitizeOverlayContentMeasurement(
   payload: unknown,
@@ -20,15 +27,28 @@ export function sanitizeOverlayContentMeasurement(
     layer?: unknown;
     measuredAtMs?: unknown;
     viewport?: { width?: unknown; height?: unknown };
-    contentRect?: { x?: unknown; y?: unknown; width?: unknown; height?: unknown } | null;
+    contentRect?: {
+      x?: unknown;
+      y?: unknown;
+      width?: unknown;
+      height?: unknown;
+    } | null;
   };
 
   if (candidate.layer !== "visible" && candidate.layer !== "invisible") {
     return null;
   }
 
-  const viewportWidth = readFiniteInRange(candidate.viewport?.width, 1, MAX_VIEWPORT);
-  const viewportHeight = readFiniteInRange(candidate.viewport?.height, 1, MAX_VIEWPORT);
+  const viewportWidth = readFiniteInRange(
+    candidate.viewport?.width,
+    1,
+    MAX_VIEWPORT,
+  );
+  const viewportHeight = readFiniteInRange(
+    candidate.viewport?.height,
+    1,
+    MAX_VIEWPORT,
+  );
 
   if (!Number.isFinite(viewportWidth) || !Number.isFinite(viewportHeight)) {
     return null;
@@ -56,9 +76,7 @@ export function sanitizeOverlayContentMeasurement(
   };
 }
 
-function sanitizeOverlayContentRect(
-  rect: unknown,
-): OverlayContentRect | null {
+function sanitizeOverlayContentRect(rect: unknown): OverlayContentRect | null {
   if (rect === null || rect === undefined) {
     return null;
   }
@@ -91,11 +109,7 @@ function sanitizeOverlayContentRect(
   return { x, y, width, height };
 }
 
-function readFiniteInRange(
-  value: unknown,
-  min: number,
-  max: number,
-): number {
+function readFiniteInRange(value: unknown, min: number, max: number): number {
   if (typeof value !== "number" || !Number.isFinite(value)) {
     return Number.NaN;
   }
@@ -141,7 +155,9 @@ export function createOverlayContentMeasurementStore(options?: {
     return measurement;
   }
 
-  function getLatestByLayer(layer: OverlayLayer): OverlayContentMeasurement | null {
+  function getLatestByLayer(
+    layer: OverlayLayer,
+  ): OverlayContentMeasurement | null {
     return latestByLayer[layer];
   }
 
diff --git a/src/core/services/overlay-manager.test.ts b/src/core/services/overlay-manager.test.ts
index 10fe978..dc4b946 100644
--- a/src/core/services/overlay-manager.test.ts
+++ b/src/core/services/overlay-manager.test.ts
@@ -17,8 +17,12 @@ test("overlay manager initializes with empty windows and hidden overlays", () =>
 
 test("overlay manager stores window references and returns stable window order", () => {
   const manager = createOverlayManager();
-  const visibleWindow = { isDestroyed: () => false } as unknown as Electron.BrowserWindow;
-  const invisibleWindow = { isDestroyed: () => false } as unknown as Electron.BrowserWindow;
+  const visibleWindow = {
+    isDestroyed: () => false,
+  } as unknown as Electron.BrowserWindow;
+  const invisibleWindow = {
+    isDestroyed: () => false,
+  } as unknown as Electron.BrowserWindow;
 
   manager.setMainWindow(visibleWindow);
   manager.setInvisibleWindow(invisibleWindow);
@@ -27,13 +31,20 @@ test("overlay manager stores window references and returns stable window order",
   assert.equal(manager.getInvisibleWindow(), invisibleWindow);
   assert.equal(manager.getOverlayWindow("visible"), visibleWindow);
   assert.equal(manager.getOverlayWindow("invisible"), invisibleWindow);
-  assert.deepEqual(manager.getOverlayWindows(), [visibleWindow, invisibleWindow]);
+  assert.deepEqual(manager.getOverlayWindows(), [
+    visibleWindow,
+    invisibleWindow,
+  ]);
 });
 
 test("overlay manager excludes destroyed windows", () => {
   const manager = createOverlayManager();
-  manager.setMainWindow({ isDestroyed: () => true } as unknown as Electron.BrowserWindow);
-  manager.setInvisibleWindow({ isDestroyed: () => false } as unknown as Electron.BrowserWindow);
+  manager.setMainWindow({
+    isDestroyed: () => true,
+  } as unknown as Electron.BrowserWindow);
+  manager.setInvisibleWindow({
+    isDestroyed: () => false,
+  } as unknown as Electron.BrowserWindow);
 
   assert.equal(manager.getOverlayWindows().length, 1);
 });
diff --git a/src/core/services/overlay-manager.ts b/src/core/services/overlay-manager.ts
index d17c090..135bdce 100644
--- a/src/core/services/overlay-manager.ts
+++ b/src/core/services/overlay-manager.ts
@@ -10,7 +10,10 @@ export interface OverlayManager {
   getInvisibleWindow: () => BrowserWindow | null;
   setInvisibleWindow: (window: BrowserWindow | null) => void;
   getOverlayWindow: (layer: OverlayLayer) => BrowserWindow | null;
-  setOverlayWindowBounds: (layer: OverlayLayer, geometry: WindowGeometry) => void;
+  setOverlayWindowBounds: (
+    layer: OverlayLayer,
+    geometry: WindowGeometry,
+  ) => void;
   getVisibleOverlayVisible: () => boolean;
   setVisibleOverlayVisible: (visible: boolean) => void;
   getInvisibleOverlayVisible: () => boolean;
@@ -79,7 +82,10 @@ export function broadcastRuntimeOptionsChangedRuntime(
   getRuntimeOptionsState: () => RuntimeOptionState[],
   broadcastToOverlayWindows: (channel: string, ...args: unknown[]) => void,
 ): void {
-  broadcastToOverlayWindows("runtime-options:changed", getRuntimeOptionsState());
+  broadcastToOverlayWindows(
+    "runtime-options:changed",
+    getRuntimeOptionsState(),
+  );
 }
 
 export function setOverlayDebugVisualizationEnabledRuntime(
diff --git a/src/core/services/overlay-runtime-init.ts b/src/core/services/overlay-runtime-init.ts
index a6085b4..a929011 100644
--- a/src/core/services/overlay-runtime-init.ts
+++ b/src/core/services/overlay-runtime-init.ts
@@ -26,12 +26,19 @@ export function initializeOverlayRuntime(options: {
   getMpvSocketPath: () => string;
   getResolvedConfig: () => { ankiConnect?: AnkiConnectConfig };
   getSubtitleTimingTracker: () => unknown | null;
-  getMpvClient: () => { send?: (payload: { command: string[] }) => void } | null;
+  getMpvClient: () => {
+    send?: (payload: { command: string[] }) => void;
+  } | null;
   getRuntimeOptionsManager: () => {
-    getEffectiveAnkiConnectConfig: (config?: AnkiConnectConfig) => AnkiConnectConfig;
+    getEffectiveAnkiConnectConfig: (
+      config?: AnkiConnectConfig,
+    ) => AnkiConnectConfig;
   } | null;
   setAnkiIntegration: (integration: unknown | null) => void;
-  showDesktopNotification: (title: string, options: { body?: string; icon?: string }) => void;
+  showDesktopNotification: (
+    title: string,
+    options: { body?: string; icon?: string },
+  ) => void;
   createFieldGroupingCallback: () => (
     data: KikuFieldGroupingRequestData,
   ) => Promise<KikuFieldGroupingChoice>;
@@ -41,7 +48,8 @@ export function initializeOverlayRuntime(options: {
 } {
   options.createMainWindow();
   options.createInvisibleWindow();
-  const invisibleOverlayVisible = options.getInitialInvisibleOverlayVisibility();
+  const invisibleOverlayVisible =
+    options.getInitialInvisibleOverlayVisibility();
   options.registerGlobalShortcuts();
 
   const windowTracker = createWindowTracker(
diff --git a/src/core/services/overlay-shortcut-handler.test.ts b/src/core/services/overlay-shortcut-handler.test.ts
index ea28fc9..b636f12 100644
--- a/src/core/services/overlay-shortcut-handler.test.ts
+++ b/src/core/services/overlay-shortcut-handler.test.ts
@@ -123,10 +123,10 @@ test("createOverlayShortcutRuntimeHandlers reports async failures via OSD", asyn
     assert.equal(logs.length, 1);
     assert.equal(typeof logs[0]?.[0], "string");
     assert.ok(String(logs[0]?.[0]).includes("markLastCardAsAudioCard failed:"));
+    assert.ok(String(logs[0]?.[0]).includes("audio boom"));
     assert.ok(
-      String(logs[0]?.[0]).includes("audio boom"),
+      osd.some((entry) => entry.includes("Audio card failed: audio boom")),
     );
-    assert.ok(osd.some((entry) => entry.includes("Audio card failed: audio boom")));
   } finally {
     console.error = originalError;
   }
@@ -134,7 +134,8 @@ test("createOverlayShortcutRuntimeHandlers reports async failures via OSD", asyn
 
 test("runOverlayShortcutLocalFallback dispatches matching actions with timeout", () => {
   const handled: string[] = [];
-  const matched: Array<{ accelerator: string; allowWhenRegistered: boolean }> = [];
+  const matched: Array<{ accelerator: string; allowWhenRegistered: boolean }> =
+    [];
   const shortcuts = makeShortcuts({
     copySubtitleMultiple: "Ctrl+M",
     multiCopyTimeoutMs: 4321,
@@ -170,11 +171,14 @@ test("runOverlayShortcutLocalFallback dispatches matching actions with timeout",
 
   assert.equal(result, true);
   assert.deepEqual(handled, ["copySubtitleMultiple:4321"]);
-  assert.deepEqual(matched, [{ accelerator: "Ctrl+M", allowWhenRegistered: false }]);
+  assert.deepEqual(matched, [
+    { accelerator: "Ctrl+M", allowWhenRegistered: false },
+  ]);
 });
 
 test("runOverlayShortcutLocalFallback passes allowWhenRegistered for secondary-sub toggle", () => {
-  const matched: Array<{ accelerator: string; allowWhenRegistered: boolean }> = [];
+  const matched: Array<{ accelerator: string; allowWhenRegistered: boolean }> =
+    [];
   const shortcuts = makeShortcuts({
     toggleSecondarySub: "Ctrl+2",
   });
@@ -205,11 +209,14 @@ test("runOverlayShortcutLocalFallback passes allowWhenRegistered for secondary-s
   );
 
   assert.equal(result, true);
-  assert.deepEqual(matched, [{ accelerator: "Ctrl+2", allowWhenRegistered: true }]);
+  assert.deepEqual(matched, [
+    { accelerator: "Ctrl+2", allowWhenRegistered: true },
+  ]);
 });
 
 test("runOverlayShortcutLocalFallback allows registered-global jimaku shortcut", () => {
-  const matched: Array<{ accelerator: string; allowWhenRegistered: boolean }> = [];
+  const matched: Array<{ accelerator: string; allowWhenRegistered: boolean }> =
+    [];
   const shortcuts = makeShortcuts({
     openJimaku: "Ctrl+J",
   });
@@ -240,7 +247,9 @@ test("runOverlayShortcutLocalFallback allows registered-global jimaku shortcut",
   );
 
   assert.equal(result, true);
-  assert.deepEqual(matched, [{ accelerator: "Ctrl+J", allowWhenRegistered: true }]);
+  assert.deepEqual(matched, [
+    { accelerator: "Ctrl+J", allowWhenRegistered: true },
+  ]);
 });
 
 test("runOverlayShortcutLocalFallback returns false when no action matches", () => {
diff --git a/src/core/services/overlay-shortcut-handler.ts b/src/core/services/overlay-shortcut-handler.ts
index 98106fa..a80c204 100644
--- a/src/core/services/overlay-shortcut-handler.ts
+++ b/src/core/services/overlay-shortcut-handler.ts
@@ -205,11 +205,7 @@ export function runOverlayShortcutLocalFallback(
   for (const action of actions) {
     if (!action.accelerator) continue;
     if (
-      matcher(
-        input,
-        action.accelerator,
-        action.allowWhenRegistered === true,
-      )
+      matcher(input, action.accelerator, action.allowWhenRegistered === true)
     ) {
       action.run();
       return true;
diff --git a/src/core/services/overlay-shortcut.ts b/src/core/services/overlay-shortcut.ts
index 85338c6..31deef8 100644
--- a/src/core/services/overlay-shortcut.ts
+++ b/src/core/services/overlay-shortcut.ts
@@ -214,9 +214,6 @@ export function refreshOverlayShortcutsRuntime(
   shortcutsRegistered: boolean,
   deps: OverlayShortcutLifecycleDeps,
 ): boolean {
-  const cleared = unregisterOverlayShortcutsRuntime(
-    shortcutsRegistered,
-    deps,
-  );
+  const cleared = unregisterOverlayShortcutsRuntime(shortcutsRegistered, deps);
   return syncOverlayShortcutsRuntime(shouldBeActive, cleared, deps);
 }
diff --git a/src/core/services/overlay-window.ts b/src/core/services/overlay-window.ts
index 2bb8470..ab3813d 100644
--- a/src/core/services/overlay-window.ts
+++ b/src/core/services/overlay-window.ts
@@ -37,7 +37,8 @@ export function enforceOverlayLayerOrder(options: {
   invisibleWindow: BrowserWindow | null;
   ensureOverlayWindowLevel: (window: BrowserWindow) => void;
 }): void {
-  if (!options.visibleOverlayVisible || !options.invisibleOverlayVisible) return;
+  if (!options.visibleOverlayVisible || !options.invisibleOverlayVisible)
+    return;
   if (!options.mainWindow || options.mainWindow.isDestroyed()) return;
   if (!options.invisibleWindow || options.invisibleWindow.isDestroyed()) return;
 
diff --git a/src/core/services/startup.ts b/src/core/services/startup.ts
index bc1916f..198a9f5 100644
--- a/src/core/services/startup.ts
+++ b/src/core/services/startup.ts
@@ -1,6 +1,10 @@
 import { CliArgs } from "../../cli/args";
 import type { LogLevelSource } from "../../logger";
-import { ConfigValidationWarning, ResolvedConfig, SecondarySubMode } from "../../types";
+import {
+  ConfigValidationWarning,
+  ResolvedConfig,
+  SecondarySubMode,
+} from "../../types";
 
 export interface StartupBootstrapRuntimeState {
   initialArgs: CliArgs;
@@ -100,6 +104,7 @@ export interface AppReadyRuntimeDeps {
   createMecabTokenizerAndCheck: () => Promise<void>;
   createSubtitleTimingTracker: () => void;
   createImmersionTracker?: () => void;
+  startJellyfinRemoteSession?: () => Promise<void>;
   loadYomitanExtension: () => Promise<void>;
   texthookerOnlyMode: boolean;
   shouldAutoInitializeOverlayRuntimeFromConfig: () => boolean;
@@ -136,9 +141,14 @@ export function isAutoUpdateEnabledRuntime(
   config: ResolvedConfig | RuntimeConfigLike,
   runtimeOptionsManager: RuntimeAutoUpdateOptionManagerLike | null,
 ): boolean {
-  const value = runtimeOptionsManager?.getOptionValue("anki.autoUpdateNewCards");
+  const value = runtimeOptionsManager?.getOptionValue(
+    "anki.autoUpdateNewCards",
+  );
   if (typeof value === "boolean") return value;
-  return (config as ResolvedConfig).ankiConnect?.behavior?.autoUpdateNewCards !== false;
+  return (
+    (config as ResolvedConfig).ankiConnect?.behavior?.autoUpdateNewCards !==
+    false
+  );
 }
 
 export async function runAppReadyRuntime(
@@ -179,12 +189,17 @@ export async function runAppReadyRuntime(
     try {
       deps.createImmersionTracker();
     } catch (error) {
-      deps.log(`Runtime ready: createImmersionTracker failed: ${(error as Error).message}`);
+      deps.log(
+        `Runtime ready: createImmersionTracker failed: ${(error as Error).message}`,
+      );
     }
   } else {
     deps.log("Runtime ready: createImmersionTracker dependency is missing.");
   }
   await deps.loadYomitanExtension();
+  if (deps.startJellyfinRemoteSession) {
+    await deps.startJellyfinRemoteSession();
+  }
 
   if (deps.texthookerOnlyMode) {
     deps.log("Texthooker-only mode enabled; skipping overlay window.");
diff --git a/src/core/services/subsync-runner.ts b/src/core/services/subsync-runner.ts
index af2b2c3..19f08d4 100644
--- a/src/core/services/subsync-runner.ts
+++ b/src/core/services/subsync-runner.ts
@@ -77,8 +77,7 @@ export async function runSubsyncManualFromIpcRuntime(
     isSubsyncInProgress: triggerDeps.isSubsyncInProgress,
     setSubsyncInProgress: triggerDeps.setSubsyncInProgress,
     showMpvOsd: triggerDeps.showMpvOsd,
-    runWithSpinner: (task) =>
-      triggerDeps.runWithSubsyncSpinner(() => task()),
+    runWithSpinner: (task) => triggerDeps.runWithSubsyncSpinner(() => task()),
     runSubsyncManual: (subsyncRequest) =>
       runSubsyncManual(subsyncRequest, triggerDeps),
   });
diff --git a/src/core/services/subsync.test.ts b/src/core/services/subsync.test.ts
index 43f070a..59277f9 100644
--- a/src/core/services/subsync.test.ts
+++ b/src/core/services/subsync.test.ts
@@ -103,7 +103,9 @@ test("triggerSubsyncFromConfig reports failures to OSD", async () => {
     }),
   );
 
-  assert.ok(osd.some((line) => line.startsWith("Subsync failed: MPV not connected")));
+  assert.ok(
+    osd.some((line) => line.startsWith("Subsync failed: MPV not connected")),
+  );
 });
 
 test("runSubsyncManual requires a source track for alass", async () => {
@@ -163,14 +165,8 @@ test("runSubsyncManual constructs ffsubsync command and returns success", async
 
   fs.writeFileSync(videoPath, "video");
   fs.writeFileSync(primaryPath, "sub");
-  writeExecutableScript(
-    ffmpegPath,
-    "#!/bin/sh\nexit 0\n",
-  );
-  writeExecutableScript(
-    alassPath,
-    "#!/bin/sh\nexit 0\n",
-  );
+  writeExecutableScript(ffmpegPath, "#!/bin/sh\nexit 0\n");
+  writeExecutableScript(alassPath, "#!/bin/sh\nexit 0\n");
   writeExecutableScript(
     ffsubsyncPath,
     `#!/bin/sh\n: > "${ffsubsyncLogPath}"\nfor arg in "$@"; do printf '%s\\n' "$arg" >> "${ffsubsyncLogPath}"; done\nout=\"\"\nprev=\"\"\nfor arg in \"$@\"; do\n  if [ \"$prev\" = \"-o\" ]; then out=\"$arg\"; fi\n  prev=\"$arg\"\ndone\nif [ -n \"$out\" ]; then : > \"$out\"; fi\nexit 0\n`,
diff --git a/src/core/services/subsync.ts b/src/core/services/subsync.ts
index d4d3056..0b3a1de 100644
--- a/src/core/services/subsync.ts
+++ b/src/core/services/subsync.ts
@@ -28,7 +28,10 @@ interface FileExtractionResult {
   temporary: boolean;
 }
 
-function summarizeCommandFailure(command: string, result: CommandResult): string {
+function summarizeCommandFailure(
+  command: string,
+  result: CommandResult,
+): string {
   const parts = [
     `code=${result.code ?? "n/a"}`,
     result.stderr ? `stderr: ${result.stderr}` : "",
@@ -62,7 +65,9 @@ function parseTrackId(value: unknown): number | null {
     const trimmed = value.trim();
     if (!trimmed.length) return null;
     const parsed = Number(trimmed);
-    return Number.isInteger(parsed) && String(parsed) === trimmed ? parsed : null;
+    return Number.isInteger(parsed) && String(parsed) === trimmed
+      ? parsed
+      : null;
   }
   return null;
 }
@@ -261,10 +266,7 @@ async function runFfsubsyncSync(
   return runCommand(ffsubsyncPath, args);
 }
 
-function loadSyncedSubtitle(
-  client: MpvClientLike,
-  pathToLoad: string,
-): void {
+function loadSyncedSubtitle(client: MpvClientLike, pathToLoad: string): void {
   if (!client.connected) {
     throw new Error("MPV disconnected while loading subtitle");
   }
@@ -411,7 +413,10 @@ export async function runSubsyncManual(
     try {
       validateFfsubsyncReference(context.videoPath);
     } catch (error) {
-      return { ok: false, message: `ffsubsync synchronization failed: ${(error as Error).message}` };
+      return {
+        ok: false,
+        message: `ffsubsync synchronization failed: ${(error as Error).message}`,
+      };
     }
     return subsyncToReference(
       "ffsubsync",
diff --git a/src/core/services/subtitle-position.ts b/src/core/services/subtitle-position.ts
index 3725c69..91dbfe8 100644
--- a/src/core/services/subtitle-position.ts
+++ b/src/core/services/subtitle-position.ts
@@ -19,18 +19,20 @@ export interface CycleSecondarySubModeDeps {
 const SECONDARY_SUB_CYCLE: SecondarySubMode[] = ["hidden", "visible", "hover"];
 const SECONDARY_SUB_TOGGLE_DEBOUNCE_MS = 120;
 
-export function cycleSecondarySubMode(
-  deps: CycleSecondarySubModeDeps,
-): void {
+export function cycleSecondarySubMode(deps: CycleSecondarySubModeDeps): void {
   const now = deps.now ? deps.now() : Date.now();
-  if (now - deps.getLastSecondarySubToggleAtMs() < SECONDARY_SUB_TOGGLE_DEBOUNCE_MS) {
+  if (
+    now - deps.getLastSecondarySubToggleAtMs() <
+    SECONDARY_SUB_TOGGLE_DEBOUNCE_MS
+  ) {
     return;
   }
   deps.setLastSecondarySubToggleAtMs(now);
 
   const currentMode = deps.getSecondarySubMode();
   const currentIndex = SECONDARY_SUB_CYCLE.indexOf(currentMode);
-  const nextMode = SECONDARY_SUB_CYCLE[(currentIndex + 1) % SECONDARY_SUB_CYCLE.length];
+  const nextMode =
+    SECONDARY_SUB_CYCLE[(currentIndex + 1) % SECONDARY_SUB_CYCLE.length];
   deps.setSecondarySubMode(nextMode);
   deps.broadcastSecondarySubMode(nextMode);
   deps.showMpvOsd(`Secondary subtitle: ${nextMode}`);
@@ -89,10 +91,12 @@ function persistSubtitlePosition(
   fs.writeFileSync(positionPath, JSON.stringify(position, null, 2));
 }
 
-export function loadSubtitlePosition(options: {
-  currentMediaPath: string | null;
-  fallbackPosition: SubtitlePosition;
-} & { subtitlePositionsDir: string }): SubtitlePosition | null {
+export function loadSubtitlePosition(
+  options: {
+    currentMediaPath: string | null;
+    fallbackPosition: SubtitlePosition;
+  } & { subtitlePositionsDir: string },
+): SubtitlePosition | null {
   if (!options.currentMediaPath) {
     return options.fallbackPosition;
   }
@@ -187,7 +191,7 @@ export function updateCurrentMediaPath(options: {
       );
       options.setSubtitlePosition(options.pendingSubtitlePosition);
       options.clearPendingSubtitlePosition();
-  } catch (err) {
+    } catch (err) {
       logger.error(
         "Failed to persist queued subtitle position:",
         (err as Error).message,
diff --git a/src/core/services/tokenizer.test.ts b/src/core/services/tokenizer.test.ts
index 81f5ee3..e162ba1 100644
--- a/src/core/services/tokenizer.test.ts
+++ b/src/core/services/tokenizer.test.ts
@@ -53,32 +53,33 @@ test("tokenizeSubtitle assigns JLPT level to parsed Yomitan tokens", async () =>
   const result = await tokenizeSubtitle(
     "猫です",
     makeDeps({
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "猫",
-                    reading: "ねこ",
-                    headwords: [[{ term: "猫" }]],
-                  },
-                  {
-                    text: "です",
-                    reading: "です",
-                    headwords: [[{ term: "です" }]],
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "猫",
+                      reading: "ねこ",
+                      headwords: [[{ term: "猫" }]],
+                    },
+                    {
+                      text: "です",
+                      reading: "です",
+                      headwords: [[{ term: "です" }]],
+                    },
+                  ],
                 ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
       tokenizeWithMecab: async () => null,
       getJlptLevel: (text) => (text === "猫" ? "N5" : null),
     }),
@@ -92,39 +93,42 @@ test("tokenizeSubtitle caches JLPT lookups across repeated tokens", async () =>
   let lookupCalls = 0;
   const result = await tokenizeSubtitle(
     "猫猫",
-    makeDepsFromMecabTokenizer(async () => [
+    makeDepsFromMecabTokenizer(
+      async () => [
+        {
+          word: "猫",
+          partOfSpeech: PartOfSpeech.noun,
+          pos1: "",
+          pos2: "",
+          pos3: "",
+          pos4: "",
+          inflectionType: "",
+          inflectionForm: "",
+          headword: "猫",
+          katakanaReading: "ネコ",
+          pronunciation: "ネコ",
+        },
+        {
+          word: "猫",
+          partOfSpeech: PartOfSpeech.noun,
+          pos1: "",
+          pos2: "",
+          pos3: "",
+          pos4: "",
+          inflectionType: "",
+          inflectionForm: "",
+          headword: "猫",
+          katakanaReading: "ネコ",
+          pronunciation: "ネコ",
+        },
+      ],
       {
-        word: "猫",
-        partOfSpeech: PartOfSpeech.noun,
-        pos1: "",
-        pos2: "",
-        pos3: "",
-        pos4: "",
-        inflectionType: "",
-        inflectionForm: "",
-        headword: "猫",
-        katakanaReading: "ネコ",
-        pronunciation: "ネコ",
+        getJlptLevel: (text) => {
+          lookupCalls += 1;
+          return text === "猫" ? "N5" : null;
+        },
       },
-      {
-        word: "猫",
-        partOfSpeech: PartOfSpeech.noun,
-        pos1: "",
-        pos2: "",
-        pos3: "",
-        pos4: "",
-        inflectionType: "",
-        inflectionForm: "",
-        headword: "猫",
-        katakanaReading: "ネコ",
-        pronunciation: "ネコ",
-      },
-    ], {
-      getJlptLevel: (text) => {
-        lookupCalls += 1;
-        return text === "猫" ? "N5" : null;
-      },
-    }),
+    ),
   );
 
   assert.equal(result.tokens?.length, 2);
@@ -136,23 +140,26 @@ test("tokenizeSubtitle caches JLPT lookups across repeated tokens", async () =>
 test("tokenizeSubtitle leaves JLPT unset for non-matching tokens", async () => {
   const result = await tokenizeSubtitle(
     "猫",
-    makeDepsFromMecabTokenizer(async () => [
+    makeDepsFromMecabTokenizer(
+      async () => [
+        {
+          word: "猫",
+          partOfSpeech: PartOfSpeech.noun,
+          pos1: "",
+          pos2: "",
+          pos3: "",
+          pos4: "",
+          inflectionType: "",
+          inflectionForm: "",
+          headword: "猫",
+          katakanaReading: "ネコ",
+          pronunciation: "ネコ",
+        },
+      ],
       {
-        word: "猫",
-        partOfSpeech: PartOfSpeech.noun,
-        pos1: "",
-        pos2: "",
-        pos3: "",
-        pos4: "",
-        inflectionType: "",
-        inflectionForm: "",
-        headword: "猫",
-        katakanaReading: "ネコ",
-        pronunciation: "ネコ",
+        getJlptLevel: () => null,
       },
-    ], {
-      getJlptLevel: () => null,
-    }),
+    ),
   );
 
   assert.equal(result.tokens?.length, 1);
@@ -162,8 +169,8 @@ test("tokenizeSubtitle leaves JLPT unset for non-matching tokens", async () => {
 test("tokenizeSubtitle skips JLPT lookups when disabled", async () => {
   let lookupCalls = 0;
   const result = await tokenizeSubtitle(
-      "猫です",
-      makeDeps({
+    "猫です",
+    makeDeps({
       tokenizeWithMecab: async () => [
         {
           headword: "猫",
@@ -233,31 +240,30 @@ test("tokenizeSubtitle uses only selected Yomitan headword for frequency lookup"
     "猫です",
     makeDeps({
       getFrequencyDictionaryEnabled: () => true,
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "猫です",
-                    reading: "ねこです",
-                    headwords: [
-                      [{ term: "猫です" }],
-                      [{ term: "猫" }],
-                    ],
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "猫です",
+                      reading: "ねこです",
+                      headwords: [[{ term: "猫です" }], [{ term: "猫" }]],
+                    },
+                  ],
                 ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
-      getFrequencyRank: (text) => (text === "猫" ? 40 : text === "猫です" ? 1200 : null),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
+      getFrequencyRank: (text) =>
+        text === "猫" ? 40 : text === "猫です" ? 1200 : null,
     }),
   );
 
@@ -270,46 +276,48 @@ test("tokenizeSubtitle keeps furigana-split Yomitan segments as one token", asyn
     "友達と話した",
     makeDeps({
       getFrequencyDictionaryEnabled: () => true,
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "友",
-                    reading: "とも",
-                    headwords: [[{ term: "友達" }]],
-                  },
-                  {
-                    text: "達",
-                    reading: "だち",
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "友",
+                      reading: "とも",
+                      headwords: [[{ term: "友達" }]],
+                    },
+                    {
+                      text: "達",
+                      reading: "だち",
+                    },
+                  ],
+                  [
+                    {
+                      text: "と",
+                      reading: "と",
+                      headwords: [[{ term: "と" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "話した",
+                      reading: "はなした",
+                      headwords: [[{ term: "話す" }]],
+                    },
+                  ],
                 ],
-                [
-                  {
-                    text: "と",
-                    reading: "と",
-                    headwords: [[{ term: "と" }]],
-                  },
-                ],
-                [
-                  {
-                    text: "話した",
-                    reading: "はなした",
-                    headwords: [[{ term: "話す" }]],
-                  },
-                ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
-      getFrequencyRank: (text) => (text === "友達" ? 22 : text === "話す" ? 90 : null),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
+      getFrequencyRank: (text) =>
+        text === "友達" ? 22 : text === "話す" ? 90 : null,
     }),
   );
 
@@ -329,28 +337,30 @@ test("tokenizeSubtitle prefers exact headword frequency over surface/reading whe
     "猫です",
     makeDeps({
       getFrequencyDictionaryEnabled: () => true,
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "猫",
-                    reading: "ねこ",
-                    headwords: [[{ term: "ネコ" }]],
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "猫",
+                      reading: "ねこ",
+                      headwords: [[{ term: "ネコ" }]],
+                    },
+                  ],
                 ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
-      getFrequencyRank: (text) => (text === "猫" ? 1200 : text === "ネコ" ? 8 : null),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
+      getFrequencyRank: (text) =>
+        text === "猫" ? 1200 : text === "ネコ" ? 8 : null,
     }),
   );
 
@@ -363,27 +373,28 @@ test("tokenizeSubtitle keeps no frequency when only reading matches and headword
     "猫です",
     makeDeps({
       getFrequencyDictionaryEnabled: () => true,
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "猫",
-                    reading: "ねこ",
-                    headwords: [[{ term: "猫です" }]],
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "猫",
+                      reading: "ねこ",
+                      headwords: [[{ term: "猫です" }]],
+                    },
+                  ],
                 ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
       getFrequencyRank: (text) => (text === "ねこ" ? 77 : null),
     }),
   );
@@ -397,31 +408,30 @@ test("tokenizeSubtitle ignores invalid frequency rank on selected headword", asy
     "猫です",
     makeDeps({
       getFrequencyDictionaryEnabled: () => true,
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "猫です",
-                    reading: "ねこです",
-                    headwords: [
-                      [{ term: "猫" }],
-                      [{ term: "猫です" }],
-                    ],
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "猫です",
+                      reading: "ねこです",
+                      headwords: [[{ term: "猫" }], [{ term: "猫です" }]],
+                    },
+                  ],
                 ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
-      getFrequencyRank: (text) => (text === "猫" ? Number.NaN : text === "猫です" ? 500 : null),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
+      getFrequencyRank: (text) =>
+        text === "猫" ? Number.NaN : text === "猫です" ? 500 : null,
     }),
   );
 
@@ -434,31 +444,30 @@ test("tokenizeSubtitle handles real-word frequency candidates and prefers most f
     "昨日",
     makeDeps({
       getFrequencyDictionaryEnabled: () => true,
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "昨日",
-                    reading: "きのう",
-                    headwords: [
-                      [{ term: "昨日" }],
-                      [{ term: "きのう" }],
-                    ],
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "昨日",
+                      reading: "きのう",
+                      headwords: [[{ term: "昨日" }], [{ term: "きのう" }]],
+                    },
+                  ],
                 ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
-      getFrequencyRank: (text) => (text === "きのう" ? 120 : text === "昨日" ? 40 : null),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
+      getFrequencyRank: (text) =>
+        text === "きのう" ? 120 : text === "昨日" ? 40 : null,
     }),
   );
 
@@ -471,32 +480,40 @@ test("tokenizeSubtitle ignores candidates with no dictionary rank when higher-fr
     "猫です",
     makeDeps({
       getFrequencyDictionaryEnabled: () => true,
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "猫",
-                    reading: "ねこ",
-                    headwords: [
-                      [{ term: "猫" }],
-                      [{ term: "猫です" }],
-                      [{ term: "unknown-term" }],
-                    ],
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "猫",
+                      reading: "ねこ",
+                      headwords: [
+                        [{ term: "猫" }],
+                        [{ term: "猫です" }],
+                        [{ term: "unknown-term" }],
+                      ],
+                    },
+                  ],
                 ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
-      getFrequencyRank: (text) => (text === "unknown-term" ? -1 : text === "猫" ? 88 : text === "猫です" ? 9000 : null),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
+      getFrequencyRank: (text) =>
+        text === "unknown-term"
+          ? -1
+          : text === "猫"
+            ? 88
+            : text === "猫です"
+              ? 9000
+              : null,
     }),
   );
 
@@ -536,27 +553,28 @@ test("tokenizeSubtitle skips frequency rank when Yomitan token is enriched as pa
     "は",
     makeDeps({
       getFrequencyDictionaryEnabled: () => true,
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "は",
-                    reading: "は",
-                    headwords: [[{ term: "は" }]],
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "は",
+                      reading: "は",
+                      headwords: [[{ term: "は" }]],
+                    },
+                  ],
                 ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
       tokenizeWithMecab: async () => [
         {
           headword: "は",
@@ -657,27 +675,28 @@ test("tokenizeSubtitle skips JLPT level for excluded demonstratives", async () =
   const result = await tokenizeSubtitle(
     "この",
     makeDeps({
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "この",
-                    reading: "この",
-                    headwords: [[{ term: "この" }]],
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "この",
+                      reading: "この",
+                      headwords: [[{ term: "この" }]],
+                    },
+                  ],
                 ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
       tokenizeWithMecab: async () => null,
       getJlptLevel: (text) => (text === "この" ? "N5" : null),
     }),
@@ -691,27 +710,28 @@ test("tokenizeSubtitle skips JLPT level for repeated kana SFX", async () => {
   const result = await tokenizeSubtitle(
     "ああ",
     makeDeps({
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "ああ",
-                    reading: "ああ",
-                    headwords: [[{ term: "ああ" }]],
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "ああ",
+                      reading: "ああ",
+                      headwords: [[{ term: "ああ" }]],
+                    },
+                  ],
                 ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
       tokenizeWithMecab: async () => null,
       getJlptLevel: (text) => (text === "ああ" ? "N5" : null),
     }),
@@ -724,23 +744,26 @@ test("tokenizeSubtitle skips JLPT level for repeated kana SFX", async () => {
 test("tokenizeSubtitle assigns JLPT level to mecab tokens", async () => {
   const result = await tokenizeSubtitle(
     "猫です",
-    makeDepsFromMecabTokenizer(async () => [
+    makeDepsFromMecabTokenizer(
+      async () => [
+        {
+          word: "猫",
+          partOfSpeech: PartOfSpeech.noun,
+          pos1: "",
+          pos2: "",
+          pos3: "",
+          pos4: "",
+          inflectionType: "",
+          inflectionForm: "",
+          headword: "猫",
+          katakanaReading: "ネコ",
+          pronunciation: "ネコ",
+        },
+      ],
       {
-        word: "猫",
-        partOfSpeech: PartOfSpeech.noun,
-        pos1: "",
-        pos2: "",
-        pos3: "",
-        pos4: "",
-        inflectionType: "",
-        inflectionForm: "",
-        headword: "猫",
-        katakanaReading: "ネコ",
-        pronunciation: "ネコ",
+        getJlptLevel: (text) => (text === "猫" ? "N4" : null),
       },
-    ], {
-      getJlptLevel: (text) => (text === "猫" ? "N4" : null),
-    }),
+    ),
   );
 
   assert.equal(result.tokens?.length, 1);
@@ -750,23 +773,26 @@ test("tokenizeSubtitle assigns JLPT level to mecab tokens", async () => {
 test("tokenizeSubtitle skips JLPT level for mecab tokens marked as ineligible", async () => {
   const result = await tokenizeSubtitle(
     "は",
-    makeDepsFromMecabTokenizer(async () => [
+    makeDepsFromMecabTokenizer(
+      async () => [
+        {
+          word: "は",
+          partOfSpeech: PartOfSpeech.particle,
+          pos1: "助詞",
+          pos2: "",
+          pos3: "",
+          pos4: "",
+          inflectionType: "",
+          inflectionForm: "",
+          headword: "は",
+          katakanaReading: "ハ",
+          pronunciation: "ハ",
+        },
+      ],
       {
-        word: "は",
-        partOfSpeech: PartOfSpeech.particle,
-        pos1: "助詞",
-        pos2: "",
-        pos3: "",
-        pos4: "",
-        inflectionType: "",
-        inflectionForm: "",
-        headword: "は",
-        katakanaReading: "ハ",
-        pronunciation: "ハ",
+        getJlptLevel: (text) => (text === "は" ? "N5" : null),
       },
-    ], {
-      getJlptLevel: (text) => (text === "は" ? "N5" : null),
-    }),
+    ),
   );
 
   assert.equal(result.tokens?.length, 1);
@@ -787,7 +813,7 @@ test("tokenizeSubtitle normalizes newlines before mecab fallback", async () => {
       tokenizeWithMecab: async (text) => {
         tokenizeInput = text;
         return [
-        {
+          {
             surface: "猫ですね",
             reading: "ネコデスネ",
             headword: "猫ですね",
@@ -877,7 +903,7 @@ test("tokenizeSubtitle uses Yomitan parser result when available", async () => {
   const result = await tokenizeSubtitle(
     "猫です",
     makeDeps({
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
       getYomitanParserWindow: () => parserWindow,
       tokenizeWithMecab: async () => null,
     }),
@@ -904,38 +930,39 @@ test("tokenizeSubtitle logs selected Yomitan groups when debug toggle is enabled
     await tokenizeSubtitle(
       "友達と話した",
       makeDeps({
-        getYomitanExt: () => ({ id: "dummy-ext" } as any),
-        getYomitanParserWindow: () => ({
-          isDestroyed: () => false,
-          webContents: {
-            executeJavaScript: async () => [
-              {
-                source: "scanning-parser",
-                index: 0,
-                content: [
-                  [
-                    {
-                      text: "友",
-                      reading: "とも",
-                      headwords: [[{ term: "友達" }]],
-                    },
-                    {
-                      text: "達",
-                      reading: "だち",
-                    },
+        getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+        getYomitanParserWindow: () =>
+          ({
+            isDestroyed: () => false,
+            webContents: {
+              executeJavaScript: async () => [
+                {
+                  source: "scanning-parser",
+                  index: 0,
+                  content: [
+                    [
+                      {
+                        text: "友",
+                        reading: "とも",
+                        headwords: [[{ term: "友達" }]],
+                      },
+                      {
+                        text: "達",
+                        reading: "だち",
+                      },
+                    ],
+                    [
+                      {
+                        text: "と",
+                        reading: "と",
+                        headwords: [[{ term: "と" }]],
+                      },
+                    ],
                   ],
-                  [
-                    {
-                      text: "と",
-                      reading: "と",
-                      headwords: [[{ term: "と" }]],
-                    },
-                  ],
-                ],
-              },
-            ],
-          },
-        } as unknown as Electron.BrowserWindow),
+                },
+              ],
+            },
+          }) as unknown as Electron.BrowserWindow,
         tokenizeWithMecab: async () => null,
         getYomitanGroupDebugEnabled: () => true,
       }),
@@ -960,31 +987,32 @@ test("tokenizeSubtitle does not log Yomitan groups when debug toggle is disabled
     await tokenizeSubtitle(
       "友達と話した",
       makeDeps({
-        getYomitanExt: () => ({ id: "dummy-ext" } as any),
-        getYomitanParserWindow: () => ({
-          isDestroyed: () => false,
-          webContents: {
-            executeJavaScript: async () => [
-              {
-                source: "scanning-parser",
-                index: 0,
-                content: [
-                  [
-                    {
-                      text: "友",
-                      reading: "とも",
-                      headwords: [[{ term: "友達" }]],
-                    },
-                    {
-                      text: "達",
-                      reading: "だち",
-                    },
+        getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+        getYomitanParserWindow: () =>
+          ({
+            isDestroyed: () => false,
+            webContents: {
+              executeJavaScript: async () => [
+                {
+                  source: "scanning-parser",
+                  index: 0,
+                  content: [
+                    [
+                      {
+                        text: "友",
+                        reading: "とも",
+                        headwords: [[{ term: "友達" }]],
+                      },
+                      {
+                        text: "達",
+                        reading: "だち",
+                      },
+                    ],
                   ],
-                ],
-              },
-            ],
-          },
-        } as unknown as Electron.BrowserWindow),
+                },
+              ],
+            },
+          }) as unknown as Electron.BrowserWindow,
         tokenizeWithMecab: async () => null,
         getYomitanGroupDebugEnabled: () => false,
       }),
@@ -1028,7 +1056,7 @@ test("tokenizeSubtitle preserves segmented Yomitan line as one token", async ()
   const result = await tokenizeSubtitle(
     "猫です",
     makeDeps({
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
       getYomitanParserWindow: () => parserWindow,
       tokenizeWithMecab: async () => null,
     }),
@@ -1046,38 +1074,69 @@ test("tokenizeSubtitle prefers mecab parser tokens when scanning parser returns
   const result = await tokenizeSubtitle(
     "俺は小園にいきたい",
     makeDeps({
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  {
-                    text: "俺は小園にいきたい",
-                    reading: "おれは小園にいきたい",
-                    headwords: [[{ term: "俺は小園にいきたい" }]],
-                  },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "俺は小園にいきたい",
+                      reading: "おれは小園にいきたい",
+                      headwords: [[{ term: "俺は小園にいきたい" }]],
+                    },
+                  ],
                 ],
-              ],
-            },
-            {
-              source: "mecab",
-              index: 0,
-              content: [
-                [{ text: "俺", reading: "おれ", headwords: [[{ term: "俺" }]] }],
-                [{ text: "は", reading: "は", headwords: [[{ term: "は" }]] }],
-                [{ text: "小園", reading: "おうえん", headwords: [[{ term: "小園" }]] }],
-                [{ text: "に", reading: "に", headwords: [[{ term: "に" }]] }],
-                [{ text: "いきたい", reading: "いきたい", headwords: [[{ term: "いきたい" }]] }],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
+              },
+              {
+                source: "mecab",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "俺",
+                      reading: "おれ",
+                      headwords: [[{ term: "俺" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "は",
+                      reading: "は",
+                      headwords: [[{ term: "は" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "小園",
+                      reading: "おうえん",
+                      headwords: [[{ term: "小園" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "に",
+                      reading: "に",
+                      headwords: [[{ term: "に" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "いきたい",
+                      reading: "いきたい",
+                      headwords: [[{ term: "いきたい" }]],
+                    },
+                  ],
+                ],
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
       getFrequencyDictionaryEnabled: () => true,
       tokenizeWithMecab: async () => null,
       getFrequencyRank: (text) =>
@@ -1086,7 +1145,10 @@ test("tokenizeSubtitle prefers mecab parser tokens when scanning parser returns
   );
 
   assert.equal(result.tokens?.length, 5);
-  assert.equal(result.tokens?.map((token) => token.surface).join(","), "俺,は,小園,に,いきたい");
+  assert.equal(
+    result.tokens?.map((token) => token.surface).join(","),
+    "俺,は,小園,に,いきたい",
+  );
   assert.equal(result.tokens?.[2]?.surface, "小園");
   assert.equal(result.tokens?.[2]?.frequencyRank, 25);
 });
@@ -1095,34 +1157,83 @@ test("tokenizeSubtitle keeps scanning parser tokens when they are already split"
   const result = await tokenizeSubtitle(
     "小園に行きたい",
     makeDeps({
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [{ text: "小園", reading: "おうえん", headwords: [[{ term: "小園" }]] }],
-                [{ text: "に", reading: "に", headwords: [[{ term: "に" }]] }],
-                [{ text: "行きたい", reading: "いきたい", headwords: [[{ term: "行きたい" }]] }],
-              ],
-            },
-            {
-              source: "mecab",
-              index: 0,
-              content: [
-                [{ text: "小", reading: "お", headwords: [[{ term: "小" }]] }],
-                [{ text: "園", reading: "えん", headwords: [[{ term: "園" }]] }],
-                [{ text: "に", reading: "に", headwords: [[{ term: "に" }]] }],
-                [{ text: "行き", reading: "いき", headwords: [[{ term: "行き" }]] }],
-                [{ text: "たい", reading: "たい", headwords: [[{ term: "たい" }]] }],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "小園",
+                      reading: "おうえん",
+                      headwords: [[{ term: "小園" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "に",
+                      reading: "に",
+                      headwords: [[{ term: "に" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "行きたい",
+                      reading: "いきたい",
+                      headwords: [[{ term: "行きたい" }]],
+                    },
+                  ],
+                ],
+              },
+              {
+                source: "mecab",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "小",
+                      reading: "お",
+                      headwords: [[{ term: "小" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "園",
+                      reading: "えん",
+                      headwords: [[{ term: "園" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "に",
+                      reading: "に",
+                      headwords: [[{ term: "に" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "行き",
+                      reading: "いき",
+                      headwords: [[{ term: "行き" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "たい",
+                      reading: "たい",
+                      headwords: [[{ term: "たい" }]],
+                    },
+                  ],
+                ],
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
       getFrequencyDictionaryEnabled: () => true,
       getFrequencyRank: (text) => (text === "小園" ? 20 : null),
       tokenizeWithMecab: async () => null,
@@ -1143,50 +1254,108 @@ test("tokenizeSubtitle prefers parse candidates with fewer fragment-only kana to
   const result = await tokenizeSubtitle(
     "俺は公園にいきたい",
     makeDeps({
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "mecab-fragmented",
-              index: 0,
-              content: [
-                [{ text: "俺", reading: "おれ", headwords: [[{ term: "俺" }]] }],
-                [{ text: "は", reading: "", headwords: [[{ term: "は" }]] }],
-                [{ text: "公園", reading: "こうえん", headwords: [[{ term: "公園" }]] }],
-                [{ text: "にい", reading: "", headwords: [[{ term: "兄" }], [{ term: "二位" }]] }],
-                [{ text: "きたい", reading: "", headwords: [[{ term: "期待" }], [{ term: "来る" }]] }],
-              ],
-            },
-            {
-              source: "mecab",
-              index: 0,
-              content: [
-                [{ text: "俺", reading: "おれ", headwords: [[{ term: "俺" }]] }],
-                [{ text: "は", reading: "は", headwords: [[{ term: "は" }]] }],
-                [{ text: "公園", reading: "こうえん", headwords: [[{ term: "公園" }]] }],
-                [{ text: "に", reading: "に", headwords: [[{ term: "に" }]] }],
-                [{ text: "行きたい", reading: "いきたい", headwords: [[{ term: "行きたい" }]] }],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "mecab-fragmented",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "俺",
+                      reading: "おれ",
+                      headwords: [[{ term: "俺" }]],
+                    },
+                  ],
+                  [{ text: "は", reading: "", headwords: [[{ term: "は" }]] }],
+                  [
+                    {
+                      text: "公園",
+                      reading: "こうえん",
+                      headwords: [[{ term: "公園" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "にい",
+                      reading: "",
+                      headwords: [[{ term: "兄" }], [{ term: "二位" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "きたい",
+                      reading: "",
+                      headwords: [[{ term: "期待" }], [{ term: "来る" }]],
+                    },
+                  ],
+                ],
+              },
+              {
+                source: "mecab",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "俺",
+                      reading: "おれ",
+                      headwords: [[{ term: "俺" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "は",
+                      reading: "は",
+                      headwords: [[{ term: "は" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "公園",
+                      reading: "こうえん",
+                      headwords: [[{ term: "公園" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "に",
+                      reading: "に",
+                      headwords: [[{ term: "に" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "行きたい",
+                      reading: "いきたい",
+                      headwords: [[{ term: "行きたい" }]],
+                    },
+                  ],
+                ],
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
       getFrequencyDictionaryEnabled: () => true,
       getFrequencyRank: (text) =>
         text === "俺"
           ? 51
           : text === "公園"
-          ? 2304
-          : text === "行きたい"
-          ? 1500
-          : null,
+            ? 2304
+            : text === "行きたい"
+              ? 1500
+              : null,
       tokenizeWithMecab: async () => null,
     }),
   );
 
-  assert.equal(result.tokens?.map((token) => token.surface).join(","), "俺,は,公園,に,行きたい");
+  assert.equal(
+    result.tokens?.map((token) => token.surface).join(","),
+    "俺,は,公園,に,行きたい",
+  );
   assert.equal(result.tokens?.[1]?.frequencyRank, undefined);
   assert.equal(result.tokens?.[3]?.frequencyRank, undefined);
   assert.equal(result.tokens?.[4]?.frequencyRank, 1500);
@@ -1196,28 +1365,38 @@ test("tokenizeSubtitle still assigns frequency to non-known Yomitan tokens", asy
   const result = await tokenizeSubtitle(
     "小園に",
     makeDeps({
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
-      getYomitanParserWindow: () => ({
-        isDestroyed: () => false,
-        webContents: {
-          executeJavaScript: async () => [
-            {
-              source: "scanning-parser",
-              index: 0,
-              content: [
-                [
-                  { text: "小園", reading: "おうえん", headwords: [[{ term: "小園" }]] },
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async () => [
+              {
+                source: "scanning-parser",
+                index: 0,
+                content: [
+                  [
+                    {
+                      text: "小園",
+                      reading: "おうえん",
+                      headwords: [[{ term: "小園" }]],
+                    },
+                  ],
+                  [
+                    {
+                      text: "に",
+                      reading: "に",
+                      headwords: [[{ term: "に" }]],
+                    },
+                  ],
                 ],
-                [
-                  { text: "に", reading: "に", headwords: [[{ term: "に" }]] },
-                ],
-              ],
-            },
-          ],
-        },
-      } as unknown as Electron.BrowserWindow),
+              },
+            ],
+          },
+        }) as unknown as Electron.BrowserWindow,
       getFrequencyDictionaryEnabled: () => true,
-      getFrequencyRank: (text) => (text === "小園" ? 75 : text === "に" ? 3000 : null),
+      getFrequencyRank: (text) =>
+        text === "小園" ? 75 : text === "に" ? 3000 : null,
       isKnownWord: (text) => text === "小園",
     }),
   );
@@ -1232,23 +1411,26 @@ test("tokenizeSubtitle still assigns frequency to non-known Yomitan tokens", asy
 test("tokenizeSubtitle marks tokens as known using callback", async () => {
   const result = await tokenizeSubtitle(
     "猫です",
-    makeDepsFromMecabTokenizer(async () => [
+    makeDepsFromMecabTokenizer(
+      async () => [
+        {
+          word: "猫",
+          partOfSpeech: PartOfSpeech.noun,
+          pos1: "",
+          pos2: "",
+          pos3: "",
+          pos4: "",
+          inflectionType: "",
+          inflectionForm: "",
+          headword: "猫",
+          katakanaReading: "ネコ",
+          pronunciation: "ネコ",
+        },
+      ],
       {
-        word: "猫",
-        partOfSpeech: PartOfSpeech.noun,
-        pos1: "",
-        pos2: "",
-        pos3: "",
-        pos4: "",
-        inflectionType: "",
-        inflectionForm: "",
-        headword: "猫",
-        katakanaReading: "ネコ",
-        pronunciation: "ネコ",
+        isKnownWord: (text) => text === "猫",
       },
-    ], {
-      isKnownWord: (text) => text === "猫",
-    }),
+    ),
   );
 
   assert.equal(result.text, "猫です");
@@ -1300,7 +1482,8 @@ test("tokenizeSubtitle still assigns frequency rank to non-known tokens", async
         },
       ],
       getFrequencyDictionaryEnabled: () => true,
-      getFrequencyRank: (text) => (text === "既知" ? 20 : text === "未知" ? 30 : null),
+      getFrequencyRank: (text) =>
+        text === "既知" ? 20 : text === "未知" ? 30 : null,
       isKnownWord: (text) => text === "既知",
     }),
   );
@@ -1336,7 +1519,7 @@ test("tokenizeSubtitle selects one N+1 target token", async () => {
           endPos: 2,
           partOfSpeech: PartOfSpeech.noun,
           isMerged: false,
-      isKnown: false,
+          isKnown: false,
           isNPlusOneTarget: false,
         },
       ],
@@ -1344,7 +1527,8 @@ test("tokenizeSubtitle selects one N+1 target token", async () => {
     }),
   );
 
-  const targets = result.tokens?.filter((token) => token.isNPlusOneTarget) ?? [];
+  const targets =
+    result.tokens?.filter((token) => token.isNPlusOneTarget) ?? [];
   assert.equal(targets.length, 1);
   assert.equal(targets[0]?.surface, "犬");
 });
@@ -1394,23 +1578,23 @@ test("tokenizeSubtitle applies N+1 target marking to Yomitan results", async ()
         {
           source: "scanning-parser",
           index: 0,
-      content: [
-        [
-          {
-            text: "猫",
-            reading: "ねこ",
-            headwords: [[{ term: "猫" }]],
-          },
-        ],
-        [
-          {
-            text: "です",
-            reading: "です",
-            headwords: [[{ term: "です" }]],
-          },
-        ],
-      ],
-    },
+          content: [
+            [
+              {
+                text: "猫",
+                reading: "ねこ",
+                headwords: [[{ term: "猫" }]],
+              },
+            ],
+            [
+              {
+                text: "です",
+                reading: "です",
+                headwords: [[{ term: "です" }]],
+              },
+            ],
+          ],
+        },
       ],
     },
   } as unknown as Electron.BrowserWindow;
@@ -1418,7 +1602,7 @@ test("tokenizeSubtitle applies N+1 target marking to Yomitan results", async ()
   const result = await tokenizeSubtitle(
     "猫です",
     makeDeps({
-      getYomitanExt: () => ({ id: "dummy-ext" } as any),
+      getYomitanExt: () => ({ id: "dummy-ext" }) as any,
       getYomitanParserWindow: () => parserWindow,
       tokenizeWithMecab: async () => null,
       isKnownWord: (text) => text === "です",
@@ -1473,23 +1657,26 @@ test("tokenizeSubtitle does not color 1-2 word sentences by default", async () =
 test("tokenizeSubtitle checks known words by headword, not surface", async () => {
   const result = await tokenizeSubtitle(
     "猫です",
-    makeDepsFromMecabTokenizer(async () => [
+    makeDepsFromMecabTokenizer(
+      async () => [
+        {
+          word: "猫",
+          partOfSpeech: PartOfSpeech.noun,
+          pos1: "",
+          pos2: "",
+          pos3: "",
+          pos4: "",
+          inflectionType: "",
+          inflectionForm: "",
+          headword: "猫です",
+          katakanaReading: "ネコ",
+          pronunciation: "ネコ",
+        },
+      ],
       {
-        word: "猫",
-        partOfSpeech: PartOfSpeech.noun,
-        pos1: "",
-        pos2: "",
-        pos3: "",
-        pos4: "",
-        inflectionType: "",
-        inflectionForm: "",
-        headword: "猫です",
-        katakanaReading: "ネコ",
-        pronunciation: "ネコ",
+        isKnownWord: (text) => text === "猫です",
       },
-    ], {
-      isKnownWord: (text) => text === "猫です",
-    }),
+    ),
   );
 
   assert.equal(result.text, "猫です");
@@ -1499,24 +1686,27 @@ test("tokenizeSubtitle checks known words by headword, not surface", async () =>
 test("tokenizeSubtitle checks known words by surface when configured", async () => {
   const result = await tokenizeSubtitle(
     "猫です",
-    makeDepsFromMecabTokenizer(async () => [
+    makeDepsFromMecabTokenizer(
+      async () => [
+        {
+          word: "猫",
+          partOfSpeech: PartOfSpeech.noun,
+          pos1: "",
+          pos2: "",
+          pos3: "",
+          pos4: "",
+          inflectionType: "",
+          inflectionForm: "",
+          headword: "猫です",
+          katakanaReading: "ネコ",
+          pronunciation: "ネコ",
+        },
+      ],
       {
-        word: "猫",
-        partOfSpeech: PartOfSpeech.noun,
-        pos1: "",
-        pos2: "",
-        pos3: "",
-        pos4: "",
-        inflectionType: "",
-        inflectionForm: "",
-        headword: "猫です",
-        katakanaReading: "ネコ",
-        pronunciation: "ネコ",
+        getKnownWordMatchMode: () => "surface",
+        isKnownWord: (text) => text === "猫",
       },
-    ], {
-      getKnownWordMatchMode: () => "surface",
-      isKnownWord: (text) => text === "猫",
-    }),
+    ),
   );
 
   assert.equal(result.text, "猫です");
diff --git a/src/core/services/tokenizer.ts b/src/core/services/tokenizer.ts
index 325c729..e820dbe 100644
--- a/src/core/services/tokenizer.ts
+++ b/src/core/services/tokenizer.ts
@@ -400,7 +400,10 @@ function isJlptEligibleToken(token: MergedToken): boolean {
     token.surface,
     token.reading,
     token.headword,
-  ].filter((candidate): candidate is string => typeof candidate === "string" && candidate.length > 0);
+  ].filter(
+    (candidate): candidate is string =>
+      typeof candidate === "string" && candidate.length > 0,
+  );
 
   for (const candidate of candidates) {
     const normalizedCandidate = normalizeJlptTextForExclusion(candidate);
@@ -457,14 +460,17 @@ function isYomitanParseLine(value: unknown): value is YomitanParseLine {
   });
 }
 
-function isYomitanHeadwordRows(value: unknown): value is YomitanParseHeadword[][] {
+function isYomitanHeadwordRows(
+  value: unknown,
+): value is YomitanParseHeadword[][] {
   return (
     Array.isArray(value) &&
     value.every(
       (group) =>
         Array.isArray(group) &&
-        group.every((item) =>
-          isObject(item) && isString((item as YomitanParseHeadword).term),
+        group.every(
+          (item) =>
+            isObject(item) && isString((item as YomitanParseHeadword).term),
         ),
     )
   );
@@ -502,7 +508,9 @@ function applyJlptMarking(
       getJlptLevel,
     );
     const fallbackLevel =
-      primaryLevel === null ? getCachedJlptLevel(token.surface, getJlptLevel) : null;
+      primaryLevel === null
+        ? getCachedJlptLevel(token.surface, getJlptLevel)
+        : null;
 
     return {
       ...token,
@@ -615,20 +623,22 @@ function selectBestYomitanParseCandidate(
 
   const getBestByTokenCount = (
     items: YomitanParseCandidate[],
-  ): YomitanParseCandidate | null => items.length === 0
-    ? null
-    : items.reduce((best, current) =>
-      current.tokens.length > best.tokens.length ? current : best,
-    );
+  ): YomitanParseCandidate | null =>
+    items.length === 0
+      ? null
+      : items.reduce((best, current) =>
+          current.tokens.length > best.tokens.length ? current : best,
+        );
 
   const getCandidateScore = (candidate: YomitanParseCandidate): number => {
     const readableTokenCount = candidate.tokens.filter(
       (token) => token.reading.trim().length > 0,
     ).length;
-    const suspiciousKanaFragmentCount = candidate.tokens.filter((token) =>
-      token.reading.trim().length === 0 &&
-      token.surface.length >= 2 &&
-      Array.from(token.surface).every((char) => isKanaChar(char))
+    const suspiciousKanaFragmentCount = candidate.tokens.filter(
+      (token) =>
+        token.reading.trim().length === 0 &&
+        token.surface.length >= 2 &&
+        Array.from(token.surface).every((char) => isKanaChar(char)),
     ).length;
 
     return (
@@ -680,7 +690,8 @@ function selectBestYomitanParseCandidate(
   const multiTokenCandidates = candidates.filter(
     (candidate) => candidate.tokens.length > 1,
   );
-  const pool = multiTokenCandidates.length > 0 ? multiTokenCandidates : candidates;
+  const pool =
+    multiTokenCandidates.length > 0 ? multiTokenCandidates : candidates;
   const bestCandidate = chooseBestCandidate(pool);
   return bestCandidate ? bestCandidate.tokens : null;
 }
@@ -705,7 +716,9 @@ function mapYomitanParseResultsToMergedTokens(
         knownWordMatchMode,
       ),
     )
-    .filter((candidate): candidate is YomitanParseCandidate => candidate !== null);
+    .filter(
+      (candidate): candidate is YomitanParseCandidate => candidate !== null,
+    );
 
   const bestCandidate = selectBestYomitanParseCandidate(candidates);
   return bestCandidate;
@@ -752,7 +765,8 @@ function pickClosestMecabPos1(
     }
 
     const mecabStart = mecabToken.startPos ?? 0;
-    const mecabEnd = mecabToken.endPos ?? mecabStart + mecabToken.surface.length;
+    const mecabEnd =
+      mecabToken.endPos ?? mecabStart + mecabToken.surface.length;
     const overlapStart = Math.max(tokenStart, mecabStart);
     const overlapEnd = Math.min(tokenEnd, mecabEnd);
     const overlap = Math.max(0, overlapEnd - overlapStart);
@@ -764,8 +778,7 @@ function pickClosestMecabPos1(
     if (
       overlap > bestOverlap ||
       (overlap === bestOverlap &&
-        (span > bestSpan ||
-          (span === bestSpan && mecabStart < bestStart)))
+        (span > bestSpan || (span === bestSpan && mecabStart < bestStart)))
     ) {
       bestOverlap = overlap;
       bestSpan = span;
@@ -879,7 +892,9 @@ async function ensureYomitanParserWindow(
     });
 
     try {
-      await parserWindow.loadURL(`chrome-extension://${yomitanExt.id}/search.html`);
+      await parserWindow.loadURL(
+        `chrome-extension://${yomitanExt.id}/search.html`,
+      );
       const readyPromise = deps.getYomitanParserReadyPromise();
       if (readyPromise) {
         await readyPromise;
@@ -963,7 +978,7 @@ async function parseWithYomitanInternalParser(
       script,
       true,
     );
-  const yomitanTokens = mapYomitanParseResultsToMergedTokens(
+    const yomitanTokens = mapYomitanParseResultsToMergedTokens(
       parseResults,
       deps.isKnownWord,
       deps.getKnownWordMatchMode(),
@@ -977,7 +992,7 @@ async function parseWithYomitanInternalParser(
     }
 
     return enrichYomitanPos1(yomitanTokens, deps, text);
-    } catch (err) {
+  } catch (err) {
     logger.error("Yomitan parser request failed:", (err as Error).message);
     return null;
   }
@@ -1013,7 +1028,10 @@ export async function tokenizeSubtitle(
   const frequencyEnabled = deps.getFrequencyDictionaryEnabled?.() !== false;
   const frequencyLookup = deps.getFrequencyRank;
 
-  const yomitanTokens = await parseWithYomitanInternalParser(tokenizeText, deps);
+  const yomitanTokens = await parseWithYomitanInternalParser(
+    tokenizeText,
+    deps,
+  );
   if (yomitanTokens && yomitanTokens.length > 0) {
     const knownMarkedTokens = applyKnownWordMarking(
       yomitanTokens,
@@ -1024,12 +1042,15 @@ export async function tokenizeSubtitle(
       frequencyEnabled && frequencyLookup
         ? applyFrequencyMarking(knownMarkedTokens, frequencyLookup)
         : knownMarkedTokens.map((token) => ({
-          ...token,
-          frequencyRank: undefined,
-        }));
+            ...token,
+            frequencyRank: undefined,
+          }));
     const jlptMarkedTokens = jlptEnabled
       ? applyJlptMarking(frequencyMarkedTokens, deps.getJlptLevel)
-      : frequencyMarkedTokens.map((token) => ({ ...token, jlptLevel: undefined }));
+      : frequencyMarkedTokens.map((token) => ({
+          ...token,
+          jlptLevel: undefined,
+        }));
     return {
       text: displayText,
       tokens: markNPlusOneTargets(
@@ -1051,12 +1072,15 @@ export async function tokenizeSubtitle(
         frequencyEnabled && frequencyLookup
           ? applyFrequencyMarking(knownMarkedTokens, frequencyLookup)
           : knownMarkedTokens.map((token) => ({
-            ...token,
-            frequencyRank: undefined,
-          }));
+              ...token,
+              frequencyRank: undefined,
+            }));
       const jlptMarkedTokens = jlptEnabled
         ? applyJlptMarking(frequencyMarkedTokens, deps.getJlptLevel)
-        : frequencyMarkedTokens.map((token) => ({ ...token, jlptLevel: undefined }));
+        : frequencyMarkedTokens.map((token) => ({
+            ...token,
+            jlptLevel: undefined,
+          }));
       return {
         text: displayText,
         tokens: markNPlusOneTargets(
diff --git a/src/core/services/yomitan-settings.ts b/src/core/services/yomitan-settings.ts
index 698db4c..5d9c955 100644
--- a/src/core/services/yomitan-settings.ts
+++ b/src/core/services/yomitan-settings.ts
@@ -32,7 +32,10 @@ export function openYomitanSettingsWindow(
     return;
   }
 
-  logger.info("Creating new settings window for extension:", options.yomitanExt.id);
+  logger.info(
+    "Creating new settings window for extension:",
+    options.yomitanExt.id,
+  );
 
   const settingsWindow = new BrowserWindow({
     width: 1200,
diff --git a/src/core/utils/index.ts b/src/core/utils/index.ts
index 5196718..f3038e5 100644
--- a/src/core/utils/index.ts
+++ b/src/core/utils/index.ts
@@ -1,5 +1,8 @@
 export { generateDefaultConfigFile } from "./config-gen";
-export { enforceUnsupportedWaylandMode, forceX11Backend } from "./electron-backend";
+export {
+  enforceUnsupportedWaylandMode,
+  forceX11Backend,
+} from "./electron-backend";
 export { asBoolean, asFiniteNumber, asString } from "./coerce";
 export { resolveKeybindings } from "./keybindings";
 export { resolveConfiguredShortcuts } from "./shortcut-config";
diff --git a/src/core/utils/shortcut-config.ts b/src/core/utils/shortcut-config.ts
index ff6c918..c36d903 100644
--- a/src/core/utils/shortcut-config.ts
+++ b/src/core/utils/shortcut-config.ts
@@ -55,7 +55,8 @@ export function resolveConfiguredShortcuts(
         defaultConfig.shortcuts?.triggerFieldGrouping,
     ),
     triggerSubsync: normalizeShortcut(
-      config.shortcuts?.triggerSubsync ?? defaultConfig.shortcuts?.triggerSubsync,
+      config.shortcuts?.triggerSubsync ??
+        defaultConfig.shortcuts?.triggerSubsync,
     ),
     mineSentence: normalizeShortcut(
       config.shortcuts?.mineSentence ?? defaultConfig.shortcuts?.mineSentence,
diff --git a/src/jimaku/utils.ts b/src/jimaku/utils.ts
index 9c96b5d..c50c872 100644
--- a/src/jimaku/utils.ts
+++ b/src/jimaku/utils.ts
@@ -239,7 +239,8 @@ export function parseMediaInfo(mediaPath: string | null): JimakuMediaInfo {
     titlePart = name.slice(0, parsed.index);
   }
 
-  const seasonFromDir = parsed.season ?? detectSeasonFromDir(normalizedMediaPath);
+  const seasonFromDir =
+    parsed.season ?? detectSeasonFromDir(normalizedMediaPath);
   const title = cleanupTitle(titlePart || name);
 
   return {
@@ -277,7 +278,9 @@ function normalizeMediaPathForJimaku(mediaPath: string): string {
       );
     });
 
-    return decodeURIComponent(candidate || parsedUrl.hostname.replace(/^www\./, ""));
+    return decodeURIComponent(
+      candidate || parsedUrl.hostname.replace(/^www\./, ""),
+    );
   } catch {
     return trimmed;
   }
diff --git a/src/main/anilist-url-guard.test.ts b/src/main/anilist-url-guard.test.ts
index 1a217f5..8e6df65 100644
--- a/src/main/anilist-url-guard.test.ts
+++ b/src/main/anilist-url-guard.test.ts
@@ -20,7 +20,9 @@ test("allows only AniList https URLs for external opens", () => {
 
 test("allows only AniList https or data URLs for setup navigation", () => {
   assert.equal(
-    isAllowedAnilistSetupNavigationUrl("https://anilist.co/api/v2/oauth/authorize"),
+    isAllowedAnilistSetupNavigationUrl(
+      "https://anilist.co/api/v2/oauth/authorize",
+    ),
     true,
   );
   assert.equal(
@@ -33,5 +35,8 @@ test("allows only AniList https or data URLs for setup navigation", () => {
     isAllowedAnilistSetupNavigationUrl("https://example.com/redirect"),
     false,
   );
-  assert.equal(isAllowedAnilistSetupNavigationUrl("javascript:alert(1)"), false);
+  assert.equal(
+    isAllowedAnilistSetupNavigationUrl("javascript:alert(1)"),
+    false,
+  );
 });
diff --git a/src/main/app-lifecycle.ts b/src/main/app-lifecycle.ts
index 47ca562..286063b 100644
--- a/src/main/app-lifecycle.ts
+++ b/src/main/app-lifecycle.ts
@@ -36,6 +36,7 @@ export interface AppReadyRuntimeDepsFactoryInput {
   createMecabTokenizerAndCheck: AppReadyRuntimeDeps["createMecabTokenizerAndCheck"];
   createSubtitleTimingTracker: AppReadyRuntimeDeps["createSubtitleTimingTracker"];
   createImmersionTracker?: AppReadyRuntimeDeps["createImmersionTracker"];
+  startJellyfinRemoteSession?: AppReadyRuntimeDeps["startJellyfinRemoteSession"];
   loadYomitanExtension: AppReadyRuntimeDeps["loadYomitanExtension"];
   texthookerOnlyMode: AppReadyRuntimeDeps["texthookerOnlyMode"];
   shouldAutoInitializeOverlayRuntimeFromConfig: AppReadyRuntimeDeps["shouldAutoInitializeOverlayRuntimeFromConfig"];
@@ -83,6 +84,7 @@ export function createAppReadyRuntimeDeps(
     createMecabTokenizerAndCheck: params.createMecabTokenizerAndCheck,
     createSubtitleTimingTracker: params.createSubtitleTimingTracker,
     createImmersionTracker: params.createImmersionTracker,
+    startJellyfinRemoteSession: params.startJellyfinRemoteSession,
     loadYomitanExtension: params.loadYomitanExtension,
     texthookerOnlyMode: params.texthookerOnlyMode,
     shouldAutoInitializeOverlayRuntimeFromConfig:
diff --git a/src/main/frequency-dictionary-runtime.ts b/src/main/frequency-dictionary-runtime.ts
index 4ea4585..6a7ba38 100644
--- a/src/main/frequency-dictionary-runtime.ts
+++ b/src/main/frequency-dictionary-runtime.ts
@@ -32,13 +32,17 @@ export function getFrequencyDictionarySearchPaths(
   if (sourcePath && sourcePath.trim()) {
     rawSearchPaths.push(sourcePath.trim());
     rawSearchPaths.push(path.join(sourcePath.trim(), "frequency-dictionary"));
-    rawSearchPaths.push(path.join(sourcePath.trim(), "vendor", "frequency-dictionary"));
+    rawSearchPaths.push(
+      path.join(sourcePath.trim(), "vendor", "frequency-dictionary"),
+    );
   }
 
   for (const dictionaryRoot of dictionaryRoots) {
     rawSearchPaths.push(dictionaryRoot);
     rawSearchPaths.push(path.join(dictionaryRoot, "frequency-dictionary"));
-    rawSearchPaths.push(path.join(dictionaryRoot, "vendor", "frequency-dictionary"));
+    rawSearchPaths.push(
+      path.join(dictionaryRoot, "vendor", "frequency-dictionary"),
+    );
   }
 
   return [...new Set(rawSearchPaths)];
@@ -64,15 +68,18 @@ export async function ensureFrequencyDictionaryLookup(
     return;
   }
   if (!frequencyDictionaryLookupInitialization) {
-    frequencyDictionaryLookupInitialization = initializeFrequencyDictionaryLookup(deps)
-      .then(() => {
-        frequencyDictionaryLookupInitialized = true;
-      })
-      .catch((error) => {
-        frequencyDictionaryLookupInitialized = true;
-        deps.log(`Failed to initialize frequency dictionary: ${String(error)}`);
-        deps.setFrequencyRankLookup(() => null);
-      });
+    frequencyDictionaryLookupInitialization =
+      initializeFrequencyDictionaryLookup(deps)
+        .then(() => {
+          frequencyDictionaryLookupInitialized = true;
+        })
+        .catch((error) => {
+          frequencyDictionaryLookupInitialized = true;
+          deps.log(
+            `Failed to initialize frequency dictionary: ${String(error)}`,
+          );
+          deps.setFrequencyRankLookup(() => null);
+        });
   }
   await frequencyDictionaryLookupInitialization;
 }
@@ -81,6 +88,7 @@ export function createFrequencyDictionaryRuntimeService(
   deps: FrequencyDictionaryRuntimeDeps,
 ): { ensureFrequencyDictionaryLookup: () => Promise<void> } {
   return {
-    ensureFrequencyDictionaryLookup: () => ensureFrequencyDictionaryLookup(deps),
+    ensureFrequencyDictionaryLookup: () =>
+      ensureFrequencyDictionaryLookup(deps),
   };
 }
diff --git a/src/main/media-runtime.ts b/src/main/media-runtime.ts
index d7585ef..c79b27b 100644
--- a/src/main/media-runtime.ts
+++ b/src/main/media-runtime.ts
@@ -62,7 +62,9 @@ export function createMediaRuntimeService(
     },
 
     resolveMediaPathForJimaku(mediaPath: string | null): string | null {
-      return mediaPath && deps.isRemoteMediaPath(mediaPath) && deps.getCurrentMediaTitle()
+      return mediaPath &&
+        deps.isRemoteMediaPath(mediaPath) &&
+        deps.getCurrentMediaTitle()
         ? deps.getCurrentMediaTitle()
         : mediaPath;
     },
diff --git a/src/main/overlay-runtime.ts b/src/main/overlay-runtime.ts
index 3de4cde..ab47a9e 100644
--- a/src/main/overlay-runtime.ts
+++ b/src/main/overlay-runtime.ts
@@ -23,7 +23,10 @@ export function createOverlayModalRuntimeService(
   deps: OverlayWindowResolver,
 ): OverlayModalRuntime {
   const restoreVisibleOverlayOnModalClose = new Set<OverlayHostedModal>();
-  const overlayModalAutoShownLayer = new Map<OverlayHostedModal, OverlayHostLayer>();
+  const overlayModalAutoShownLayer = new Map<
+    OverlayHostedModal,
+    OverlayHostLayer
+  >();
 
   const getTargetOverlayWindow = (): {
     window: BrowserWindow;
@@ -43,7 +46,10 @@ export function createOverlayModalRuntimeService(
     return null;
   };
 
-  const showOverlayWindowForModal = (window: BrowserWindow, layer: OverlayHostLayer): void => {
+  const showOverlayWindowForModal = (
+    window: BrowserWindow,
+    layer: OverlayHostLayer,
+  ): void => {
     if (layer === "invisible" && typeof window.showInactive === "function") {
       window.showInactive();
     } else {
@@ -133,7 +139,8 @@ export function createOverlayModalRuntimeService(
     sendToActiveOverlayWindow,
     openRuntimeOptionsPalette,
     handleOverlayModalClosed,
-    getRestoreVisibleOverlayOnModalClose: () => restoreVisibleOverlayOnModalClose,
+    getRestoreVisibleOverlayOnModalClose: () =>
+      restoreVisibleOverlayOnModalClose,
   };
 }
 
diff --git a/src/main/overlay-shortcuts-runtime.ts b/src/main/overlay-shortcuts-runtime.ts
index 284ceb2..02fa110 100644
--- a/src/main/overlay-shortcuts-runtime.ts
+++ b/src/main/overlay-shortcuts-runtime.ts
@@ -90,7 +90,8 @@ export function createOverlayShortcutsRuntimeService(
     };
   };
 
-  const shouldOverlayShortcutsBeActive = () => input.isOverlayRuntimeInitialized();
+  const shouldOverlayShortcutsBeActive = () =>
+    input.isOverlayRuntimeInitialized();
 
   return {
     tryHandleOverlayShortcutLocalFallback: (inputEvent) =>
diff --git a/src/main/subsync-runtime.ts b/src/main/subsync-runtime.ts
index 92128bb..4b7c526 100644
--- a/src/main/subsync-runtime.ts
+++ b/src/main/subsync-runtime.ts
@@ -1,5 +1,9 @@
 import { SubsyncResolvedConfig } from "../subsync/utils";
-import type { SubsyncManualPayload, SubsyncManualRunRequest, SubsyncResult } from "../types";
+import type {
+  SubsyncManualPayload,
+  SubsyncManualRunRequest,
+  SubsyncResult,
+} from "../types";
 import type { SubsyncRuntimeDeps } from "../core/services/subsync-runner";
 import { createSubsyncRuntimeDeps } from "./dependencies";
 import {
@@ -54,7 +58,9 @@ export function createSubsyncRuntimeServiceDeps(
 export function triggerSubsyncFromConfigRuntime(
   params: SubsyncRuntimeServiceInput,
 ): Promise<void> {
-  return triggerSubsyncFromConfigRuntimeCore(createSubsyncRuntimeServiceDeps(params));
+  return triggerSubsyncFromConfigRuntimeCore(
+    createSubsyncRuntimeServiceDeps(params),
+  );
 }
 
 export async function runSubsyncManualFromIpcRuntime(
diff --git a/src/media-generator.ts b/src/media-generator.ts
index 7647f40..2d6407b 100644
--- a/src/media-generator.ts
+++ b/src/media-generator.ts
@@ -62,10 +62,7 @@ export class MediaGenerator {
             fs.unlinkSync(filePath);
           }
         } catch (err) {
-          log.debug(
-            `Failed to clean up ${filePath}:`,
-            (err as Error).message,
-          );
+          log.debug(`Failed to clean up ${filePath}:`, (err as Error).message);
         }
       }
     } catch (err) {
@@ -374,12 +371,7 @@ export class MediaGenerator {
           "8",
         );
       } else if (av1Encoder === "libsvtav1") {
-        encoderArgs.push(
-          "-crf",
-          clampedCrf.toString(),
-          "-preset",
-          "8",
-        );
+        encoderArgs.push("-crf", clampedCrf.toString(), "-preset", "8");
       } else {
         // librav1e
         encoderArgs.push("-qp", clampedCrf.toString(), "-speed", "8");
diff --git a/src/renderer/handlers/keyboard.ts b/src/renderer/handlers/keyboard.ts
index 8a07807..ca32b24 100644
--- a/src/renderer/handlers/keyboard.ts
+++ b/src/renderer/handlers/keyboard.ts
@@ -24,13 +24,28 @@ export function createKeyboardHandlers(
   // Timeout for the modal chord capture window (e.g. Y followed by H/K).
   const CHORD_TIMEOUT_MS = 1000;
 
-  const CHORD_MAP = new Map<string, { type: "mpv" | "electron"; command?: string[]; action?: () => void }>([
+  const CHORD_MAP = new Map<
+    string,
+    { type: "mpv" | "electron"; command?: string[]; action?: () => void }
+  >([
     ["KeyS", { type: "mpv", command: ["script-message", "subminer-start"] }],
-    ["Shift+KeyS", { type: "mpv", command: ["script-message", "subminer-stop"] }],
+    [
+      "Shift+KeyS",
+      { type: "mpv", command: ["script-message", "subminer-stop"] },
+    ],
     ["KeyT", { type: "mpv", command: ["script-message", "subminer-toggle"] }],
-    ["KeyI", { type: "mpv", command: ["script-message", "subminer-toggle-invisible"] }],
-    ["Shift+KeyI", { type: "mpv", command: ["script-message", "subminer-show-invisible"] }],
-    ["KeyU", { type: "mpv", command: ["script-message", "subminer-hide-invisible"] }],
+    [
+      "KeyI",
+      { type: "mpv", command: ["script-message", "subminer-toggle-invisible"] },
+    ],
+    [
+      "Shift+KeyI",
+      { type: "mpv", command: ["script-message", "subminer-show-invisible"] },
+    ],
+    [
+      "KeyU",
+      { type: "mpv", command: ["script-message", "subminer-hide-invisible"] },
+    ],
     ["KeyO", { type: "mpv", command: ["script-message", "subminer-options"] }],
     ["KeyR", { type: "mpv", command: ["script-message", "subminer-restart"] }],
     ["KeyC", { type: "mpv", command: ["script-message", "subminer-status"] }],
@@ -48,7 +63,8 @@ export function createKeyboardHandlers(
     if (target.tagName === "IFRAME" && target.id?.startsWith("yomitan-popup")) {
       return true;
     }
-    if (target.closest && target.closest('iframe[id^="yomitan-popup"]')) return true;
+    if (target.closest && target.closest('iframe[id^="yomitan-popup"]'))
+      return true;
     return false;
   }
 
@@ -193,7 +209,9 @@ export function createKeyboardHandlers(
     }
 
     document.addEventListener("keydown", (e: KeyboardEvent) => {
-      const yomitanPopup = document.querySelector('iframe[id^="yomitan-popup"]');
+      const yomitanPopup = document.querySelector(
+        'iframe[id^="yomitan-popup"]',
+      );
       if (yomitanPopup) return;
       if (handleInvisiblePositionEditKeydown(e)) return;
 
diff --git a/src/renderer/handlers/mouse.ts b/src/renderer/handlers/mouse.ts
index 0b33cce..c1f02c5 100644
--- a/src/renderer/handlers/mouse.ts
+++ b/src/renderer/handlers/mouse.ts
@@ -4,7 +4,10 @@ export function createMouseHandlers(
   ctx: RendererContext,
   options: {
     modalStateReader: ModalStateReader;
-    applyInvisibleSubtitleLayoutFromMpvMetrics: (metrics: any, source: string) => void;
+    applyInvisibleSubtitleLayoutFromMpvMetrics: (
+      metrics: any,
+      source: string,
+    ) => void;
     applyYPercent: (yPercent: number) => void;
     getCurrentYPercent: () => number;
     persistSubtitlePositionPatch: (patch: { yPercent: number }) => void;
@@ -26,7 +29,11 @@ export function createMouseHandlers(
   function handleMouseLeave(): void {
     ctx.state.isOverSubtitle = false;
     const yomitanPopup = document.querySelector('iframe[id^="yomitan-popup"]');
-    if (!yomitanPopup && !options.modalStateReader.isAnyModalOpen() && !ctx.state.invisiblePositionEditMode) {
+    if (
+      !yomitanPopup &&
+      !options.modalStateReader.isAnyModalOpen() &&
+      !ctx.state.invisiblePositionEditMode
+    ) {
       ctx.dom.overlay.classList.remove("interactive");
       if (ctx.platform.shouldToggleMouseIgnore) {
         window.electronAPI.setIgnoreMouseEvents(true, { forward: true });
@@ -70,7 +77,10 @@ export function createMouseHandlers(
     });
   }
 
-  function getCaretTextPointRange(clientX: number, clientY: number): Range | null {
+  function getCaretTextPointRange(
+    clientX: number,
+    clientY: number,
+  ): Range | null {
     const documentWithCaretApi = document as Document & {
       caretRangeFromPoint?: (x: number, y: number) => Range | null;
       caretPositionFromPoint?: (
@@ -84,7 +94,10 @@ export function createMouseHandlers(
     }
 
     if (typeof documentWithCaretApi.caretPositionFromPoint === "function") {
-      const caretPosition = documentWithCaretApi.caretPositionFromPoint(clientX, clientY);
+      const caretPosition = documentWithCaretApi.caretPositionFromPoint(
+        clientX,
+        clientY,
+      );
       if (!caretPosition) return null;
       const range = document.createRange();
       range.setStart(caretPosition.offsetNode, caretPosition.offset);
@@ -103,7 +116,9 @@ export function createMouseHandlers(
 
     const clampedOffset = Math.max(0, Math.min(offset, text.length));
     const probeIndex =
-      clampedOffset >= text.length ? Math.max(0, text.length - 1) : clampedOffset;
+      clampedOffset >= text.length
+        ? Math.max(0, text.length - 1)
+        : clampedOffset;
 
     if (wordSegmenter) {
       for (const part of wordSegmenter.segment(text)) {
@@ -117,7 +132,9 @@ export function createMouseHandlers(
     }
 
     const isBoundary = (char: string): boolean =>
-      /[\s\u3000.,!?;:()[\]{}"'`~<>/\\|@#$%^&*+=\-、。・「」『』【】〈〉《》]/.test(char);
+      /[\s\u3000.,!?;:()[\]{}"'`~<>/\\|@#$%^&*+=\-、。・「」『』【】〈〉《》]/.test(
+        char,
+      );
 
     const probeChar = text[probeIndex];
     if (!probeChar || isBoundary(probeChar)) return null;
@@ -148,7 +165,10 @@ export function createMouseHandlers(
     if (!ctx.dom.subtitleRoot.contains(caretRange.startContainer)) return;
 
     const textNode = caretRange.startContainer as Text;
-    const wordBounds = getWordBoundsAtOffset(textNode.data, caretRange.startOffset);
+    const wordBounds = getWordBoundsAtOffset(
+      textNode.data,
+      caretRange.startOffset,
+    );
     if (!wordBounds) return;
 
     const selectionKey = `${wordBounds.start}:${wordBounds.end}:${textNode.data.slice(
@@ -242,10 +262,15 @@ export function createMouseHandlers(
             element.id &&
             element.id.startsWith("yomitan-popup")
           ) {
-            if (!ctx.state.isOverSubtitle && !options.modalStateReader.isAnyModalOpen()) {
+            if (
+              !ctx.state.isOverSubtitle &&
+              !options.modalStateReader.isAnyModalOpen()
+            ) {
               ctx.dom.overlay.classList.remove("interactive");
               if (ctx.platform.shouldToggleMouseIgnore) {
-                window.electronAPI.setIgnoreMouseEvents(true, { forward: true });
+                window.electronAPI.setIgnoreMouseEvents(true, {
+                  forward: true,
+                });
               }
             }
           }
diff --git a/src/renderer/modals/jimaku.ts b/src/renderer/modals/jimaku.ts
index 9eb4002..f95bcc6 100644
--- a/src/renderer/modals/jimaku.ts
+++ b/src/renderer/modals/jimaku.ts
@@ -158,7 +158,10 @@ export function createJimakuModal(
     }
   }
 
-  async function loadFiles(entryId: number, episode: number | null): Promise<void> {
+  async function loadFiles(
+    entryId: number,
+    episode: number | null,
+  ): Promise<void> {
     setJimakuStatus("Loading files...");
     ctx.state.jimakuFiles = [];
     ctx.state.selectedFileIndex = 0;
@@ -224,11 +227,12 @@ export function createJimakuModal(
     const file = ctx.state.jimakuFiles[index];
     setJimakuStatus("Downloading subtitle...");
 
-    const result: JimakuDownloadResult = await window.electronAPI.jimakuDownloadFile({
-      entryId: ctx.state.currentEntryId,
-      url: file.url,
-      name: file.name,
-    });
+    const result: JimakuDownloadResult =
+      await window.electronAPI.jimakuDownloadFile({
+        entryId: ctx.state.currentEntryId,
+        url: file.url,
+        name: file.name,
+      });
 
     if (result.ok) {
       setJimakuStatus(`Downloaded and loaded: ${result.path}`);
@@ -265,8 +269,12 @@ export function createJimakuModal(
       .getJimakuMediaInfo()
       .then((info: JimakuMediaInfo) => {
         ctx.dom.jimakuTitleInput.value = info.title || "";
-        ctx.dom.jimakuSeasonInput.value = info.season ? String(info.season) : "";
-        ctx.dom.jimakuEpisodeInput.value = info.episode ? String(info.episode) : "";
+        ctx.dom.jimakuSeasonInput.value = info.season
+          ? String(info.season)
+          : "";
+        ctx.dom.jimakuEpisodeInput.value = info.episode
+          ? String(info.episode)
+          : "";
         ctx.state.currentEpisodeFilter = info.episode ?? null;
 
         if (info.confidence === "high" && info.title && info.episode) {
@@ -291,7 +299,10 @@ export function createJimakuModal(
     ctx.dom.jimakuModal.setAttribute("aria-hidden", "true");
     window.electronAPI.notifyOverlayModalClosed("jimaku");
 
-    if (!ctx.state.isOverSubtitle && !options.modalStateReader.isAnyModalOpen()) {
+    if (
+      !ctx.state.isOverSubtitle &&
+      !options.modalStateReader.isAnyModalOpen()
+    ) {
       ctx.dom.overlay.classList.remove("interactive");
     }
 
@@ -334,10 +345,16 @@ export function createJimakuModal(
     if (e.key === "ArrowUp") {
       e.preventDefault();
       if (ctx.state.jimakuFiles.length > 0) {
-        ctx.state.selectedFileIndex = Math.max(0, ctx.state.selectedFileIndex - 1);
+        ctx.state.selectedFileIndex = Math.max(
+          0,
+          ctx.state.selectedFileIndex - 1,
+        );
         renderFiles();
       } else if (ctx.state.jimakuEntries.length > 0) {
-        ctx.state.selectedEntryIndex = Math.max(0, ctx.state.selectedEntryIndex - 1);
+        ctx.state.selectedEntryIndex = Math.max(
+          0,
+          ctx.state.selectedEntryIndex - 1,
+        );
         renderEntries();
       }
       return true;
diff --git a/src/renderer/modals/kiku.ts b/src/renderer/modals/kiku.ts
index f99fd13..8c6473f 100644
--- a/src/renderer/modals/kiku.ts
+++ b/src/renderer/modals/kiku.ts
@@ -20,8 +20,14 @@ export function createKikuModal(
   }
 
   function updateKikuCardSelection(): void {
-    ctx.dom.kikuCard1.classList.toggle("active", ctx.state.kikuSelectedCard === 1);
-    ctx.dom.kikuCard2.classList.toggle("active", ctx.state.kikuSelectedCard === 2);
+    ctx.dom.kikuCard1.classList.toggle(
+      "active",
+      ctx.state.kikuSelectedCard === 1,
+    );
+    ctx.dom.kikuCard2.classList.toggle(
+      "active",
+      ctx.state.kikuSelectedCard === 2,
+    );
   }
 
   function setKikuModalStep(step: "select" | "preview"): void {
@@ -50,7 +56,9 @@ export function createKikuModal(
       ctx.state.kikuPreviewMode === "compact"
         ? ctx.state.kikuPreviewCompactData
         : ctx.state.kikuPreviewFullData;
-    ctx.dom.kikuPreviewJson.textContent = payload ? JSON.stringify(payload, null, 2) : "{}";
+    ctx.dom.kikuPreviewJson.textContent = payload
+      ? JSON.stringify(payload, null, 2)
+      : "{}";
     updateKikuPreviewToggle();
   }
 
@@ -78,7 +86,8 @@ export function createKikuModal(
     ctx.state.kikuSelectedCard = 1;
 
     ctx.dom.kikuCard1Expression.textContent = data.original.expression;
-    ctx.dom.kikuCard1Sentence.textContent = data.original.sentencePreview || "(no sentence)";
+    ctx.dom.kikuCard1Sentence.textContent =
+      data.original.sentencePreview || "(no sentence)";
     ctx.dom.kikuCard1Meta.textContent = formatMediaMeta(data.original);
 
     ctx.dom.kikuCard2Expression.textContent = data.duplicate.expression;
@@ -123,7 +132,10 @@ export function createKikuModal(
     ctx.state.kikuOriginalData = null;
     ctx.state.kikuDuplicateData = null;
 
-    if (!ctx.state.isOverSubtitle && !options.modalStateReader.isAnyModalOpen()) {
+    if (
+      !ctx.state.isOverSubtitle &&
+      !options.modalStateReader.isAnyModalOpen()
+    ) {
       ctx.dom.overlay.classList.remove("interactive");
     }
   }
diff --git a/src/renderer/modals/subsync.ts b/src/renderer/modals/subsync.ts
index 744be9e..1ac7eb5 100644
--- a/src/renderer/modals/subsync.ts
+++ b/src/renderer/modals/subsync.ts
@@ -26,7 +26,8 @@ export function createSubsyncModal(
       option.textContent = track.label;
       ctx.dom.subsyncSourceSelect.appendChild(option);
     }
-    ctx.dom.subsyncSourceSelect.disabled = ctx.state.subsyncSourceTracks.length === 0;
+    ctx.dom.subsyncSourceSelect.disabled =
+      ctx.state.subsyncSourceTracks.length === 0;
   }
 
   function closeSubsyncModal(): void {
@@ -39,7 +40,10 @@ export function createSubsyncModal(
     ctx.dom.subsyncModal.setAttribute("aria-hidden", "true");
     window.electronAPI.notifyOverlayModalClosed("subsync");
 
-    if (!ctx.state.isOverSubtitle && !options.modalStateReader.isAnyModalOpen()) {
+    if (
+      !ctx.state.isOverSubtitle &&
+      !options.modalStateReader.isAnyModalOpen()
+    ) {
       ctx.dom.overlay.classList.remove("interactive");
     }
   }
diff --git a/src/renderer/overlay-content-measurement.ts b/src/renderer/overlay-content-measurement.ts
index b9fd04a..d2755c9 100644
--- a/src/renderer/overlay-content-measurement.ts
+++ b/src/renderer/overlay-content-measurement.ts
@@ -26,7 +26,10 @@ function toMeasuredRect(rect: DOMRect): OverlayContentRect | null {
   };
 }
 
-function unionRects(a: OverlayContentRect, b: OverlayContentRect): OverlayContentRect {
+function unionRects(
+  a: OverlayContentRect,
+  b: OverlayContentRect,
+): OverlayContentRect {
   const left = Math.min(a.x, b.x);
   const top = Math.min(a.y, b.y);
   const right = Math.max(a.x + a.width, b.x + b.width);
@@ -48,7 +51,9 @@ function collectContentRect(ctx: RendererContext): OverlayContentRect | null {
 
   const subtitleHasContent = hasVisibleTextContent(ctx.dom.subtitleRoot);
   if (subtitleHasContent) {
-    const subtitleRect = toMeasuredRect(ctx.dom.subtitleRoot.getBoundingClientRect());
+    const subtitleRect = toMeasuredRect(
+      ctx.dom.subtitleRoot.getBoundingClientRect(),
+    );
     if (subtitleRect) {
       combinedRect = subtitleRect;
     }
diff --git a/src/renderer/positioning/controller.ts b/src/renderer/positioning/controller.ts
index c67c2d1..daff957 100644
--- a/src/renderer/positioning/controller.ts
+++ b/src/renderer/positioning/controller.ts
@@ -32,7 +32,8 @@ export function createPositioningController(
     {
       applyInvisibleSubtitleOffsetPosition:
         invisibleOffset.applyInvisibleSubtitleOffsetPosition,
-      updateInvisiblePositionEditHud: invisibleOffset.updateInvisiblePositionEditHud,
+      updateInvisiblePositionEditHud:
+        invisibleOffset.updateInvisiblePositionEditHud,
     },
   );
 
diff --git a/src/renderer/positioning/invisible-layout-helpers.ts b/src/renderer/positioning/invisible-layout-helpers.ts
index e6882ab..043eddb 100644
--- a/src/renderer/positioning/invisible-layout-helpers.ts
+++ b/src/renderer/positioning/invisible-layout-helpers.ts
@@ -6,12 +6,15 @@ const INVISIBLE_MACOS_LINE_HEIGHT_SINGLE = "0.92";
 const INVISIBLE_MACOS_LINE_HEIGHT_MULTI = "1.2";
 const INVISIBLE_MACOS_LINE_HEIGHT_MULTI_DENSE = "1.3";
 
-export function applyContainerBaseLayout(ctx: RendererContext, params: {
-  horizontalAvailable: number;
-  leftInset: number;
-  marginX: number;
-  hAlign: 0 | 1 | 2;
-}): void {
+export function applyContainerBaseLayout(
+  ctx: RendererContext,
+  params: {
+    horizontalAvailable: number;
+    leftInset: number;
+    marginX: number;
+    hAlign: 0 | 1 | 2;
+  },
+): void {
   const { horizontalAvailable, leftInset, marginX, hAlign } = params;
 
   ctx.dom.subtitleContainer.style.position = "absolute";
@@ -42,19 +45,26 @@ export function applyContainerBaseLayout(ctx: RendererContext, params: {
   ctx.dom.subtitleRoot.style.pointerEvents = "auto";
 }
 
-export function applyVerticalPosition(ctx: RendererContext, params: {
-  metrics: MpvSubtitleRenderMetrics;
-  renderAreaHeight: number;
-  topInset: number;
-  bottomInset: number;
-  marginY: number;
-  effectiveFontSize: number;
-  vAlign: 0 | 1 | 2;
-}): void {
+export function applyVerticalPosition(
+  ctx: RendererContext,
+  params: {
+    metrics: MpvSubtitleRenderMetrics;
+    renderAreaHeight: number;
+    topInset: number;
+    bottomInset: number;
+    marginY: number;
+    effectiveFontSize: number;
+    vAlign: 0 | 1 | 2;
+  },
+): void {
   const lineCount = Math.max(1, ctx.state.currentInvisibleSubtitleLineCount);
   const multiline = lineCount > 1;
-  const baselineCompensationFactor = lineCount >= 3 ? 0.46 : multiline ? 0.58 : 0.7;
-  const baselineCompensationPx = Math.max(0, params.effectiveFontSize * baselineCompensationFactor);
+  const baselineCompensationFactor =
+    lineCount >= 3 ? 0.46 : multiline ? 0.58 : 0.7;
+  const baselineCompensationPx = Math.max(
+    0,
+    params.effectiveFontSize * baselineCompensationFactor,
+  );
 
   if (params.vAlign === 2) {
     ctx.dom.subtitleContainer.style.top = `${Math.max(
@@ -72,7 +82,8 @@ export function applyVerticalPosition(ctx: RendererContext, params: {
     return;
   }
 
-  const subPosMargin = ((100 - params.metrics.subPos) / 100) * params.renderAreaHeight;
+  const subPosMargin =
+    ((100 - params.metrics.subPos) / 100) * params.renderAreaHeight;
   const effectiveMargin = Math.max(params.marginY, subPosMargin);
   const bottomPx = Math.max(
     0,
@@ -96,7 +107,10 @@ function resolveFontFamily(rawFont: string): string {
     : `"${rawFont}", sans-serif`;
 }
 
-function resolveLineHeight(lineCount: number, isMacOSPlatform: boolean): string {
+function resolveLineHeight(
+  lineCount: number,
+  isMacOSPlatform: boolean,
+): string {
   if (!isMacOSPlatform) return "normal";
   if (lineCount >= 3) return INVISIBLE_MACOS_LINE_HEIGHT_MULTI_DENSE;
   if (lineCount >= 2) return INVISIBLE_MACOS_LINE_HEIGHT_MULTI;
@@ -115,8 +129,13 @@ function resolveLetterSpacing(
   return isMacOSPlatform ? "-0.02em" : "0px";
 }
 
-function applyComputedLineHeightCompensation(ctx: RendererContext, effectiveFontSize: number): void {
-  const computedLineHeight = parseFloat(getComputedStyle(ctx.dom.subtitleRoot).lineHeight);
+function applyComputedLineHeightCompensation(
+  ctx: RendererContext,
+  effectiveFontSize: number,
+): void {
+  const computedLineHeight = parseFloat(
+    getComputedStyle(ctx.dom.subtitleRoot).lineHeight,
+  );
   if (
     !Number.isFinite(computedLineHeight) ||
     computedLineHeight <= effectiveFontSize
@@ -151,11 +170,14 @@ function applyMacOSAdjustments(ctx: RendererContext): void {
   )}px`;
 }
 
-export function applyTypography(ctx: RendererContext, params: {
-  metrics: MpvSubtitleRenderMetrics;
-  pxPerScaledPixel: number;
-  effectiveFontSize: number;
-}): void {
+export function applyTypography(
+  ctx: RendererContext,
+  params: {
+    metrics: MpvSubtitleRenderMetrics;
+    pxPerScaledPixel: number;
+    effectiveFontSize: number;
+  },
+): void {
   const lineCount = Math.max(1, ctx.state.currentInvisibleSubtitleLineCount);
   const isMacOSPlatform = ctx.platform.isMacOSPlatform;
 
@@ -164,7 +186,9 @@ export function applyTypography(ctx: RendererContext, params: {
     resolveLineHeight(lineCount, isMacOSPlatform),
     isMacOSPlatform ? "important" : "",
   );
-  ctx.dom.subtitleRoot.style.fontFamily = resolveFontFamily(params.metrics.subFont);
+  ctx.dom.subtitleRoot.style.fontFamily = resolveFontFamily(
+    params.metrics.subFont,
+  );
   ctx.dom.subtitleRoot.style.setProperty(
     "letter-spacing",
     resolveLetterSpacing(
@@ -175,8 +199,12 @@ export function applyTypography(ctx: RendererContext, params: {
     isMacOSPlatform ? "important" : "",
   );
   ctx.dom.subtitleRoot.style.fontKerning = isMacOSPlatform ? "auto" : "none";
-  ctx.dom.subtitleRoot.style.fontWeight = params.metrics.subBold ? "700" : "400";
-  ctx.dom.subtitleRoot.style.fontStyle = params.metrics.subItalic ? "italic" : "normal";
+  ctx.dom.subtitleRoot.style.fontWeight = params.metrics.subBold
+    ? "700"
+    : "400";
+  ctx.dom.subtitleRoot.style.fontStyle = params.metrics.subItalic
+    ? "italic"
+    : "normal";
   ctx.dom.subtitleRoot.style.transform = "";
   ctx.dom.subtitleRoot.style.transformOrigin = "";
 
diff --git a/src/renderer/positioning/invisible-layout-metrics.ts b/src/renderer/positioning/invisible-layout-metrics.ts
index 3648fe2..0720067 100644
--- a/src/renderer/positioning/invisible-layout-metrics.ts
+++ b/src/renderer/positioning/invisible-layout-metrics.ts
@@ -74,7 +74,10 @@ export function applyPlatformFontCompensation(
 function calculateGeometry(
   metrics: MpvSubtitleRenderMetrics,
   osdToCssScale: number,
-): Omit<SubtitleLayoutGeometry, "marginY" | "marginX" | "pxPerScaledPixel" | "effectiveFontSize"> {
+): Omit<
+  SubtitleLayoutGeometry,
+  "marginY" | "marginX" | "pxPerScaledPixel" | "effectiveFontSize"
+> {
   const dims = metrics.osdDimensions;
   const renderAreaHeight = dims ? dims.h / osdToCssScale : window.innerHeight;
   const renderAreaWidth = dims ? dims.w / osdToCssScale : window.innerWidth;
@@ -88,7 +91,10 @@ function calculateGeometry(
   const rightInset = anchorToVideoArea ? videoRightInset : 0;
   const topInset = anchorToVideoArea ? videoTopInset : 0;
   const bottomInset = anchorToVideoArea ? videoBottomInset : 0;
-  const horizontalAvailable = Math.max(0, renderAreaWidth - leftInset - rightInset);
+  const horizontalAvailable = Math.max(
+    0,
+    renderAreaWidth - leftInset - rightInset,
+  );
 
   return {
     renderAreaHeight,
@@ -113,11 +119,16 @@ export function calculateSubtitleMetrics(
     window.devicePixelRatio || 1,
   );
   const geometry = calculateGeometry(metrics, osdToCssScale);
-  const videoHeight = geometry.renderAreaHeight - geometry.topInset - geometry.bottomInset;
-  const scaleRefHeight = metrics.subScaleByWindow ? geometry.renderAreaHeight : videoHeight;
+  const videoHeight =
+    geometry.renderAreaHeight - geometry.topInset - geometry.bottomInset;
+  const scaleRefHeight = metrics.subScaleByWindow
+    ? geometry.renderAreaHeight
+    : videoHeight;
   const pxPerScaledPixel = Math.max(0.1, scaleRefHeight / 720);
   const computedFontSize =
-    metrics.subFontSize * metrics.subScale * (ctx.platform.isLinuxPlatform ? 1 : pxPerScaledPixel);
+    metrics.subFontSize *
+    metrics.subScale *
+    (ctx.platform.isLinuxPlatform ? 1 : pxPerScaledPixel);
   const effectiveFontSize = applyPlatformFontCompensation(
     computedFontSize,
     ctx.platform.isMacOSPlatform,
diff --git a/src/renderer/positioning/invisible-layout.ts b/src/renderer/positioning/invisible-layout.ts
index df7dd38..f60f865 100644
--- a/src/renderer/positioning/invisible-layout.ts
+++ b/src/renderer/positioning/invisible-layout.ts
@@ -11,7 +11,10 @@ import {
 } from "./invisible-layout-metrics.js";
 
 export type MpvSubtitleLayoutController = {
-  applyInvisibleSubtitleLayoutFromMpvMetrics: (metrics: MpvSubtitleRenderMetrics, source: string) => void;
+  applyInvisibleSubtitleLayoutFromMpvMetrics: (
+    metrics: MpvSubtitleRenderMetrics,
+    source: string,
+  ) => void;
 };
 
 export function createMpvSubtitleLayoutController(
@@ -29,10 +32,15 @@ export function createMpvSubtitleLayoutController(
     ctx.state.mpvSubtitleRenderMetrics = metrics;
 
     const geometry = calculateSubtitleMetrics(ctx, metrics);
-    const alignment = calculateSubtitlePosition(metrics, geometry.pxPerScaledPixel, 2);
+    const alignment = calculateSubtitlePosition(
+      metrics,
+      geometry.pxPerScaledPixel,
+      2,
+    );
 
     applySubtitleFontSize(geometry.effectiveFontSize);
-    const effectiveBorderSize = metrics.subBorderSize * geometry.pxPerScaledPixel;
+    const effectiveBorderSize =
+      metrics.subBorderSize * geometry.pxPerScaledPixel;
 
     document.documentElement.style.setProperty(
       "--sub-border-size",
@@ -81,7 +89,10 @@ export function createMpvSubtitleLayoutController(
     options.applyInvisibleSubtitleOffsetPosition();
     options.updateInvisiblePositionEditHud();
 
-    console.log("[invisible-overlay] Applied mpv subtitle render metrics from", source);
+    console.log(
+      "[invisible-overlay] Applied mpv subtitle render metrics from",
+      source,
+    );
   }
 
   return {
diff --git a/src/renderer/positioning/invisible-offset.ts b/src/renderer/positioning/invisible-offset.ts
index af8c318..8f41382 100644
--- a/src/renderer/positioning/invisible-offset.ts
+++ b/src/renderer/positioning/invisible-offset.ts
@@ -2,7 +2,10 @@ import type { SubtitlePosition } from "../../types";
 import type { ModalStateReader, RendererContext } from "../context";
 
 export type InvisibleOffsetController = {
-  applyInvisibleStoredSubtitlePosition: (position: SubtitlePosition | null, source: string) => void;
+  applyInvisibleStoredSubtitlePosition: (
+    position: SubtitlePosition | null,
+    source: string,
+  ) => void;
   applyInvisibleSubtitleOffsetPosition: () => void;
   updateInvisiblePositionEditHud: () => void;
   setInvisiblePositionEditMode: (enabled: boolean) => void;
@@ -15,9 +18,7 @@ function formatEditHudText(offsetX: number, offsetY: number): string {
   return `Position Edit  Ctrl/Cmd+Shift+P toggle  Arrow keys move  Enter/Ctrl+S save  Esc cancel  x:${Math.round(offsetX)} y:${Math.round(offsetY)}`;
 }
 
-function createEditPositionText(
-  ctx: RendererContext,
-): string {
+function createEditPositionText(ctx: RendererContext): string {
   return formatEditHudText(
     ctx.state.invisibleSubtitleOffsetXPx,
     ctx.state.invisibleSubtitleOffsetYPx,
@@ -32,7 +33,8 @@ function applyOffsetByBasePosition(ctx: RendererContext): void {
   if (ctx.state.invisibleLayoutBaseBottomPx !== null) {
     ctx.dom.subtitleContainer.style.bottom = `${Math.max(
       0,
-      ctx.state.invisibleLayoutBaseBottomPx + ctx.state.invisibleSubtitleOffsetYPx,
+      ctx.state.invisibleLayoutBaseBottomPx +
+        ctx.state.invisibleSubtitleOffsetYPx,
     )}px`;
     ctx.dom.subtitleContainer.style.top = "";
     return;
@@ -59,14 +61,19 @@ export function createInvisibleOffsetController(
     document.body.classList.toggle("invisible-position-edit", enabled);
 
     if (enabled) {
-      ctx.state.invisiblePositionEditStartX = ctx.state.invisibleSubtitleOffsetXPx;
-      ctx.state.invisiblePositionEditStartY = ctx.state.invisibleSubtitleOffsetYPx;
+      ctx.state.invisiblePositionEditStartX =
+        ctx.state.invisibleSubtitleOffsetXPx;
+      ctx.state.invisiblePositionEditStartY =
+        ctx.state.invisibleSubtitleOffsetYPx;
       ctx.dom.overlay.classList.add("interactive");
       if (ctx.platform.shouldToggleMouseIgnore) {
         window.electronAPI.setIgnoreMouseEvents(false);
       }
     } else {
-      if (!ctx.state.isOverSubtitle && !modalStateReader.isAnySettingsModalOpen()) {
+      if (
+        !ctx.state.isOverSubtitle &&
+        !modalStateReader.isAnySettingsModalOpen()
+      ) {
         ctx.dom.overlay.classList.remove("interactive");
         if (ctx.platform.shouldToggleMouseIgnore) {
           window.electronAPI.setIgnoreMouseEvents(true, { forward: true });
@@ -79,14 +86,18 @@ export function createInvisibleOffsetController(
 
   function updateInvisiblePositionEditHud(): void {
     if (!ctx.state.invisiblePositionEditHud) return;
-    ctx.state.invisiblePositionEditHud.textContent = createEditPositionText(ctx);
+    ctx.state.invisiblePositionEditHud.textContent =
+      createEditPositionText(ctx);
   }
 
   function applyInvisibleSubtitleOffsetPosition(): void {
     applyOffsetByBasePosition(ctx);
   }
 
-  function applyInvisibleStoredSubtitlePosition(position: SubtitlePosition | null, source: string): void {
+  function applyInvisibleStoredSubtitlePosition(
+    position: SubtitlePosition | null,
+    source: string,
+  ): void {
     if (
       position &&
       typeof position.yPercent === "number" &&
@@ -100,11 +111,13 @@ export function createInvisibleOffsetController(
 
     if (position) {
       const nextX =
-        typeof position.invisibleOffsetXPx === "number" && Number.isFinite(position.invisibleOffsetXPx)
+        typeof position.invisibleOffsetXPx === "number" &&
+        Number.isFinite(position.invisibleOffsetXPx)
           ? position.invisibleOffsetXPx
           : 0;
       const nextY =
-        typeof position.invisibleOffsetYPx === "number" && Number.isFinite(position.invisibleOffsetYPx)
+        typeof position.invisibleOffsetYPx === "number" &&
+        Number.isFinite(position.invisibleOffsetYPx)
           ? position.invisibleOffsetYPx
           : 0;
       ctx.state.invisibleSubtitleOffsetXPx = nextX;
@@ -135,8 +148,10 @@ export function createInvisibleOffsetController(
   }
 
   function cancelInvisiblePositionEdit(): void {
-    ctx.state.invisibleSubtitleOffsetXPx = ctx.state.invisiblePositionEditStartX;
-    ctx.state.invisibleSubtitleOffsetYPx = ctx.state.invisiblePositionEditStartY;
+    ctx.state.invisibleSubtitleOffsetXPx =
+      ctx.state.invisiblePositionEditStartX;
+    ctx.state.invisibleSubtitleOffsetYPx =
+      ctx.state.invisiblePositionEditStartY;
     applyOffsetByBasePosition(ctx);
     setInvisiblePositionEditMode(false);
   }
diff --git a/src/renderer/positioning/position-state.ts b/src/renderer/positioning/position-state.ts
index a8d94aa..2517c6d 100644
--- a/src/renderer/positioning/position-state.ts
+++ b/src/renderer/positioning/position-state.ts
@@ -5,21 +5,31 @@ const PREFERRED_Y_PERCENT_MIN = 2;
 const PREFERRED_Y_PERCENT_MAX = 80;
 
 export type SubtitlePositionController = {
-  applyStoredSubtitlePosition: (position: SubtitlePosition | null, source: string) => void;
+  applyStoredSubtitlePosition: (
+    position: SubtitlePosition | null,
+    source: string,
+  ) => void;
   getCurrentYPercent: () => number;
   applyYPercent: (yPercent: number) => void;
   persistSubtitlePositionPatch: (patch: Partial<SubtitlePosition>) => void;
 };
 
 function clampYPercent(yPercent: number): number {
-  return Math.max(PREFERRED_Y_PERCENT_MIN, Math.min(PREFERRED_Y_PERCENT_MAX, yPercent));
+  return Math.max(
+    PREFERRED_Y_PERCENT_MIN,
+    Math.min(PREFERRED_Y_PERCENT_MAX, yPercent),
+  );
 }
 
 function getPersistedYPercent(
   ctx: RendererContext,
   position: SubtitlePosition | null,
 ): number {
-  if (!position || typeof position.yPercent !== "number" || !Number.isFinite(position.yPercent)) {
+  if (
+    !position ||
+    typeof position.yPercent !== "number" ||
+    !Number.isFinite(position.yPercent)
+  ) {
     return ctx.state.persistedSubtitlePosition.yPercent;
   }
 
@@ -66,12 +76,12 @@ function getNextPersistedPosition(
       typeof patch.invisibleOffsetXPx === "number" &&
       Number.isFinite(patch.invisibleOffsetXPx)
         ? patch.invisibleOffsetXPx
-        : ctx.state.persistedSubtitlePosition.invisibleOffsetXPx ?? 0,
+        : (ctx.state.persistedSubtitlePosition.invisibleOffsetXPx ?? 0),
     invisibleOffsetYPx:
       typeof patch.invisibleOffsetYPx === "number" &&
       Number.isFinite(patch.invisibleOffsetYPx)
         ? patch.invisibleOffsetYPx
-        : ctx.state.persistedSubtitlePosition.invisibleOffsetYPx ?? 0,
+        : (ctx.state.persistedSubtitlePosition.invisibleOffsetYPx ?? 0),
   };
 }
 
@@ -83,8 +93,11 @@ export function createInMemorySubtitlePositionController(
       return ctx.state.currentYPercent;
     }
 
-    const marginBottom = parseFloat(ctx.dom.subtitleContainer.style.marginBottom) || 60;
-    ctx.state.currentYPercent = clampYPercent((marginBottom / window.innerHeight) * 100);
+    const marginBottom =
+      parseFloat(ctx.dom.subtitleContainer.style.marginBottom) || 60;
+    ctx.state.currentYPercent = clampYPercent(
+      (marginBottom / window.innerHeight) * 100,
+    );
     return ctx.state.currentYPercent;
   }
 
@@ -101,13 +114,18 @@ export function createInMemorySubtitlePositionController(
     ctx.dom.subtitleContainer.style.marginBottom = `${marginBottom}px`;
   }
 
-  function persistSubtitlePositionPatch(patch: Partial<SubtitlePosition>): void {
+  function persistSubtitlePositionPatch(
+    patch: Partial<SubtitlePosition>,
+  ): void {
     const nextPosition = getNextPersistedPosition(ctx, patch);
     ctx.state.persistedSubtitlePosition = nextPosition;
     window.electronAPI.saveSubtitlePosition(nextPosition);
   }
 
-  function applyStoredSubtitlePosition(position: SubtitlePosition | null, source: string): void {
+  function applyStoredSubtitlePosition(
+    position: SubtitlePosition | null,
+    source: string,
+  ): void {
     updatePersistedSubtitlePosition(ctx, position);
     if (position && position.yPercent !== undefined) {
       applyYPercent(position.yPercent);
diff --git a/src/renderer/renderer.ts b/src/renderer/renderer.ts
index 1d194bd..91d3ab1 100644
--- a/src/renderer/renderer.ts
+++ b/src/renderer/renderer.ts
@@ -132,7 +132,10 @@ async function init(): Promise<void> {
 
   window.electronAPI.onSubtitlePosition((position: SubtitlePosition | null) => {
     if (ctx.platform.isInvisibleLayer) {
-      positioning.applyInvisibleStoredSubtitlePosition(position, "media-change");
+      positioning.applyInvisibleStoredSubtitlePosition(
+        position,
+        "media-change",
+      );
     } else {
       positioning.applyStoredSubtitlePosition(position, "media-change");
     }
@@ -140,10 +143,15 @@ async function init(): Promise<void> {
   });
 
   if (ctx.platform.isInvisibleLayer) {
-    window.electronAPI.onMpvSubtitleRenderMetrics((metrics: MpvSubtitleRenderMetrics) => {
-      positioning.applyInvisibleSubtitleLayoutFromMpvMetrics(metrics, "event");
-      measurementReporter.schedule();
-    });
+    window.electronAPI.onMpvSubtitleRenderMetrics(
+      (metrics: MpvSubtitleRenderMetrics) => {
+        positioning.applyInvisibleSubtitleLayoutFromMpvMetrics(
+          metrics,
+          "event",
+        );
+        measurementReporter.schedule();
+      },
+    );
     window.electronAPI.onOverlayDebugVisualization((enabled: boolean) => {
       document.body.classList.toggle("debug-invisible-visualization", enabled);
     });
@@ -162,8 +170,12 @@ async function init(): Promise<void> {
     measurementReporter.schedule();
   });
 
-  subtitleRenderer.updateSecondarySubMode(await window.electronAPI.getSecondarySubMode());
-  subtitleRenderer.renderSecondarySub(await window.electronAPI.getCurrentSecondarySub());
+  subtitleRenderer.updateSecondarySubMode(
+    await window.electronAPI.getSecondarySubMode(),
+  );
+  subtitleRenderer.renderSecondarySub(
+    await window.electronAPI.getCurrentSecondarySub(),
+  );
   measurementReporter.schedule();
 
   const hoverTarget = ctx.platform.isInvisibleLayer
@@ -171,8 +183,14 @@ async function init(): Promise<void> {
     : ctx.dom.subtitleContainer;
   hoverTarget.addEventListener("mouseenter", mouseHandlers.handleMouseEnter);
   hoverTarget.addEventListener("mouseleave", mouseHandlers.handleMouseLeave);
-  ctx.dom.secondarySubContainer.addEventListener("mouseenter", mouseHandlers.handleMouseEnter);
-  ctx.dom.secondarySubContainer.addEventListener("mouseleave", mouseHandlers.handleMouseLeave);
+  ctx.dom.secondarySubContainer.addEventListener(
+    "mouseenter",
+    mouseHandlers.handleMouseEnter,
+  );
+  ctx.dom.secondarySubContainer.addEventListener(
+    "mouseleave",
+    mouseHandlers.handleMouseLeave,
+  );
 
   mouseHandlers.setupInvisibleHoverSelection();
   positioning.setupInvisiblePositionEditHud();
@@ -189,9 +207,11 @@ async function init(): Promise<void> {
   subsyncModal.wireDomEvents();
   sessionHelpModal.wireDomEvents();
 
-  window.electronAPI.onRuntimeOptionsChanged((options: RuntimeOptionState[]) => {
-    runtimeOptionsModal.updateRuntimeOptions(options);
-  });
+  window.electronAPI.onRuntimeOptionsChanged(
+    (options: RuntimeOptionState[]) => {
+      runtimeOptionsModal.updateRuntimeOptions(options);
+    },
+  );
   window.electronAPI.onOpenRuntimeOptions(() => {
     runtimeOptionsModal.openRuntimeOptionsModal().catch(() => {
       runtimeOptionsModal.setRuntimeOptionsStatus(
@@ -209,7 +229,10 @@ async function init(): Promise<void> {
     subsyncModal.openSubsyncModal(payload);
   });
   window.electronAPI.onKikuFieldGroupingRequest(
-    (data: { original: KikuDuplicateCardInfo; duplicate: KikuDuplicateCardInfo }) => {
+    (data: {
+      original: KikuDuplicateCardInfo;
+      duplicate: KikuDuplicateCardInfo;
+    }) => {
       kikuModal.openKikuFieldGroupingModal(data);
     },
   );
@@ -220,7 +243,9 @@ async function init(): Promise<void> {
 
   await keyboardHandlers.setupMpvInputForwarding();
 
-  subtitleRenderer.applySubtitleStyle(await window.electronAPI.getSubtitleStyle());
+  subtitleRenderer.applySubtitleStyle(
+    await window.electronAPI.getSubtitleStyle(),
+  );
 
   if (ctx.platform.isInvisibleLayer) {
     positioning.applyInvisibleStoredSubtitlePosition(
diff --git a/src/renderer/subtitle-render.test.ts b/src/renderer/subtitle-render.test.ts
index f70430c..47137e9 100644
--- a/src/renderer/subtitle-render.test.ts
+++ b/src/renderer/subtitle-render.test.ts
@@ -95,7 +95,13 @@ test("computeWordClass does not add frequency class to known or N+1 terms", () =
       topX: 100,
       mode: "single",
       singleColor: "#000000",
-      bandedColors: ["#000000", "#000000", "#000000", "#000000", "#000000"] as const,
+      bandedColors: [
+        "#000000",
+        "#000000",
+        "#000000",
+        "#000000",
+        "#000000",
+      ] as const,
     }),
     "word word-known",
   );
@@ -105,7 +111,13 @@ test("computeWordClass does not add frequency class to known or N+1 terms", () =
       topX: 100,
       mode: "single",
       singleColor: "#000000",
-      bandedColors: ["#000000", "#000000", "#000000", "#000000", "#000000"] as const,
+      bandedColors: [
+        "#000000",
+        "#000000",
+        "#000000",
+        "#000000",
+        "#000000",
+      ] as const,
     }),
     "word word-n-plus-one",
   );
@@ -115,7 +127,13 @@ test("computeWordClass does not add frequency class to known or N+1 terms", () =
       topX: 100,
       mode: "single",
       singleColor: "#000000",
-      bandedColors: ["#000000", "#000000", "#000000", "#000000", "#000000"] as const,
+      bandedColors: [
+        "#000000",
+        "#000000",
+        "#000000",
+        "#000000",
+        "#000000",
+      ] as const,
     }),
     "word word-frequency-single",
   );
@@ -127,16 +145,19 @@ test("computeWordClass adds frequency class for single mode when rank is within
     frequencyRank: 50,
   });
 
-  const actual = computeWordClass(
-    token,
-    {
-      enabled: true,
-      topX: 100,
-      mode: "single",
-      singleColor: "#000000",
-      bandedColors: ["#000000", "#000000", "#000000", "#000000", "#000000"] as const,
-    },
-  );
+  const actual = computeWordClass(token, {
+    enabled: true,
+    topX: 100,
+    mode: "single",
+    singleColor: "#000000",
+    bandedColors: [
+      "#000000",
+      "#000000",
+      "#000000",
+      "#000000",
+      "#000000",
+    ] as const,
+  });
 
   assert.equal(actual, "word word-frequency-single");
 });
@@ -147,16 +168,19 @@ test("computeWordClass adds frequency class when rank equals topX", () => {
     frequencyRank: 100,
   });
 
-  const actual = computeWordClass(
-    token,
-    {
-      enabled: true,
-      topX: 100,
-      mode: "single",
-      singleColor: "#000000",
-      bandedColors: ["#000000", "#000000", "#000000", "#000000", "#000000"] as const,
-    },
-  );
+  const actual = computeWordClass(token, {
+    enabled: true,
+    topX: 100,
+    mode: "single",
+    singleColor: "#000000",
+    bandedColors: [
+      "#000000",
+      "#000000",
+      "#000000",
+      "#000000",
+      "#000000",
+    ] as const,
+  });
 
   assert.equal(actual, "word word-frequency-single");
 });
@@ -167,17 +191,19 @@ test("computeWordClass adds frequency class for banded mode", () => {
     frequencyRank: 250,
   });
 
-  const actual = computeWordClass(
-    token,
-    {
-      enabled: true,
-      topX: 1000,
-      mode: "banded",
-      singleColor: "#000000",
-      bandedColors:
-        ["#111111", "#222222", "#333333", "#444444", "#555555"] as const,
-    },
-  );
+  const actual = computeWordClass(token, {
+    enabled: true,
+    topX: 1000,
+    mode: "banded",
+    singleColor: "#000000",
+    bandedColors: [
+      "#111111",
+      "#222222",
+      "#333333",
+      "#444444",
+      "#555555",
+    ] as const,
+  });
 
   assert.equal(actual, "word word-frequency-band-2");
 });
@@ -193,13 +219,7 @@ test("computeWordClass uses configured band count for banded mode", () => {
     topX: 4,
     mode: "banded",
     singleColor: "#000000",
-    bandedColors: [
-      "#111111",
-      "#222222",
-      "#333333",
-      "#444444",
-      "#555555",
-    ],
+    bandedColors: ["#111111", "#222222", "#333333", "#444444", "#555555"],
   } as any);
 
   assert.equal(actual, "word word-frequency-band-3");
@@ -211,16 +231,19 @@ test("computeWordClass skips frequency class when rank is out of topX", () => {
     frequencyRank: 1200,
   });
 
-  const actual = computeWordClass(
-    token,
-    {
-      enabled: true,
-      topX: 1000,
-      mode: "single",
-      singleColor: "#000000",
-      bandedColors: ["#000000", "#000000", "#000000", "#000000", "#000000"] as const,
-    },
-  );
+  const actual = computeWordClass(token, {
+    enabled: true,
+    topX: 1000,
+    mode: "single",
+    singleColor: "#000000",
+    bandedColors: [
+      "#000000",
+      "#000000",
+      "#000000",
+      "#000000",
+      "#000000",
+    ] as const,
+  });
 
   assert.equal(actual, "word");
 });
@@ -229,9 +252,7 @@ test("JLPT CSS rules use underline-only styling in renderer stylesheet", () => {
   const distCssPath = path.join(process.cwd(), "dist", "renderer", "style.css");
   const srcCssPath = path.join(process.cwd(), "src", "renderer", "style.css");
 
-  const cssPath = fs.existsSync(distCssPath)
-    ? distCssPath
-    : srcCssPath;
+  const cssPath = fs.existsSync(distCssPath) ? distCssPath : srcCssPath;
   if (!fs.existsSync(cssPath)) {
     assert.fail(
       "JLPT CSS file missing. Run `pnpm run build` first, or ensure src/renderer/style.css exists.",
@@ -259,7 +280,10 @@ test("JLPT CSS rules use underline-only styling in renderer stylesheet", () => {
         ? "#subtitleRoot .word.word-frequency-single"
         : `#subtitleRoot .word.word-frequency-band-${band}`,
     );
-    assert.ok(block.length > 0, `frequency class word-frequency-${band === 1 ? "single" : `band-${band}`} should exist`);
+    assert.ok(
+      block.length > 0,
+      `frequency class word-frequency-${band === 1 ? "single" : `band-${band}`} should exist`,
+    );
     assert.match(block, /color:\s*var\(/);
   }
 });
diff --git a/src/renderer/subtitle-render.ts b/src/renderer/subtitle-render.ts
index c701b7a..21f1cf8 100644
--- a/src/renderer/subtitle-render.ts
+++ b/src/renderer/subtitle-render.ts
@@ -72,12 +72,18 @@ function getFrequencyDictionaryClass(
     return "";
   }
 
-  if (typeof token.frequencyRank !== "number" || !Number.isFinite(token.frequencyRank)) {
+  if (
+    typeof token.frequencyRank !== "number" ||
+    !Number.isFinite(token.frequencyRank)
+  ) {
     return "";
   }
 
   const rank = Math.max(1, Math.floor(token.frequencyRank));
-  const topX = sanitizeFrequencyTopX(settings.topX, DEFAULT_FREQUENCY_RENDER_SETTINGS.topX);
+  const topX = sanitizeFrequencyTopX(
+    settings.topX,
+    DEFAULT_FREQUENCY_RENDER_SETTINGS.topX,
+  );
   if (rank > topX) {
     return "";
   }
@@ -121,16 +127,16 @@ function renderWithTokens(
 
     if (surface.includes("\n")) {
       const parts = surface.split("\n");
-        for (let i = 0; i < parts.length; i += 1) {
-          if (parts[i]) {
-            const span = document.createElement("span");
-            span.className = computeWordClass(
-              token,
-              resolvedFrequencyRenderSettings,
-            );
-            span.textContent = parts[i];
-            if (token.reading) span.dataset.reading = token.reading;
-            if (token.headword) span.dataset.headword = token.headword;
+      for (let i = 0; i < parts.length; i += 1) {
+        if (parts[i]) {
+          const span = document.createElement("span");
+          span.className = computeWordClass(
+            token,
+            resolvedFrequencyRenderSettings,
+          );
+          span.textContent = parts[i];
+          if (token.reading) span.dataset.reading = token.reading;
+          if (token.headword) span.dataset.headword = token.headword;
           fragment.appendChild(span);
         }
         if (i < parts.length - 1) {
@@ -214,7 +220,10 @@ function renderCharacterLevel(root: HTMLElement, text: string): void {
   root.appendChild(fragment);
 }
 
-function renderPlainTextPreserveLineBreaks(root: HTMLElement, text: string): void {
+function renderPlainTextPreserveLineBreaks(
+  root: HTMLElement,
+  text: string,
+): void {
   const lines = text.split("\n");
   const fragment = document.createDocumentFragment();
 
@@ -255,7 +264,10 @@ export function createSubtitleRenderer(ctx: RendererContext) {
         1,
         normalizedInvisible.split("\n").length,
       );
-      renderPlainTextPreserveLineBreaks(ctx.dom.subtitleRoot, normalizedInvisible);
+      renderPlainTextPreserveLineBreaks(
+        ctx.dom.subtitleRoot,
+        normalizedInvisible,
+      );
       return;
     }
 
@@ -331,10 +343,13 @@ export function createSubtitleRenderer(ctx: RendererContext) {
   function applySubtitleStyle(style: SubtitleStyleConfig | null): void {
     if (!style) return;
 
-    if (style.fontFamily) ctx.dom.subtitleRoot.style.fontFamily = style.fontFamily;
-    if (style.fontSize) ctx.dom.subtitleRoot.style.fontSize = `${style.fontSize}px`;
+    if (style.fontFamily)
+      ctx.dom.subtitleRoot.style.fontFamily = style.fontFamily;
+    if (style.fontSize)
+      ctx.dom.subtitleRoot.style.fontSize = `${style.fontSize}px`;
     if (style.fontColor) ctx.dom.subtitleRoot.style.color = style.fontColor;
-    if (style.fontWeight) ctx.dom.subtitleRoot.style.fontWeight = style.fontWeight;
+    if (style.fontWeight)
+      ctx.dom.subtitleRoot.style.fontWeight = style.fontWeight;
     if (style.fontStyle) ctx.dom.subtitleRoot.style.fontStyle = style.fontStyle;
     if (style.backgroundColor) {
       ctx.dom.subtitleContainer.style.background = style.backgroundColor;
@@ -352,12 +367,12 @@ export function createSubtitleRenderer(ctx: RendererContext) {
       N5: ctx.state.jlptN5Color ?? "#8aadf4",
       ...(style.jlptColors
         ? {
-          N1: sanitizeHexColor(style.jlptColors?.N1, ctx.state.jlptN1Color),
-          N2: sanitizeHexColor(style.jlptColors?.N2, ctx.state.jlptN2Color),
-          N3: sanitizeHexColor(style.jlptColors?.N3, ctx.state.jlptN3Color),
-          N4: sanitizeHexColor(style.jlptColors?.N4, ctx.state.jlptN4Color),
-          N5: sanitizeHexColor(style.jlptColors?.N5, ctx.state.jlptN5Color),
-        }
+            N1: sanitizeHexColor(style.jlptColors?.N1, ctx.state.jlptN1Color),
+            N2: sanitizeHexColor(style.jlptColors?.N2, ctx.state.jlptN2Color),
+            N3: sanitizeHexColor(style.jlptColors?.N3, ctx.state.jlptN3Color),
+            N4: sanitizeHexColor(style.jlptColors?.N4, ctx.state.jlptN4Color),
+            N5: sanitizeHexColor(style.jlptColors?.N5, ctx.state.jlptN5Color),
+          }
         : {}),
     };
 
@@ -367,20 +382,39 @@ export function createSubtitleRenderer(ctx: RendererContext) {
       "--subtitle-known-word-color",
       knownWordColor,
     );
-    ctx.dom.subtitleRoot.style.setProperty("--subtitle-n-plus-one-color", nPlusOneColor);
+    ctx.dom.subtitleRoot.style.setProperty(
+      "--subtitle-n-plus-one-color",
+      nPlusOneColor,
+    );
     ctx.state.jlptN1Color = jlptColors.N1;
     ctx.state.jlptN2Color = jlptColors.N2;
     ctx.state.jlptN3Color = jlptColors.N3;
     ctx.state.jlptN4Color = jlptColors.N4;
     ctx.state.jlptN5Color = jlptColors.N5;
-    ctx.dom.subtitleRoot.style.setProperty("--subtitle-jlpt-n1-color", jlptColors.N1);
-    ctx.dom.subtitleRoot.style.setProperty("--subtitle-jlpt-n2-color", jlptColors.N2);
-    ctx.dom.subtitleRoot.style.setProperty("--subtitle-jlpt-n3-color", jlptColors.N3);
-    ctx.dom.subtitleRoot.style.setProperty("--subtitle-jlpt-n4-color", jlptColors.N4);
-    ctx.dom.subtitleRoot.style.setProperty("--subtitle-jlpt-n5-color", jlptColors.N5);
+    ctx.dom.subtitleRoot.style.setProperty(
+      "--subtitle-jlpt-n1-color",
+      jlptColors.N1,
+    );
+    ctx.dom.subtitleRoot.style.setProperty(
+      "--subtitle-jlpt-n2-color",
+      jlptColors.N2,
+    );
+    ctx.dom.subtitleRoot.style.setProperty(
+      "--subtitle-jlpt-n3-color",
+      jlptColors.N3,
+    );
+    ctx.dom.subtitleRoot.style.setProperty(
+      "--subtitle-jlpt-n4-color",
+      jlptColors.N4,
+    );
+    ctx.dom.subtitleRoot.style.setProperty(
+      "--subtitle-jlpt-n5-color",
+      jlptColors.N5,
+    );
     const frequencyDictionarySettings = style.frequencyDictionary ?? {};
     const frequencyEnabled =
-      frequencyDictionarySettings.enabled ?? ctx.state.frequencyDictionaryEnabled;
+      frequencyDictionarySettings.enabled ??
+      ctx.state.frequencyDictionaryEnabled;
     const frequencyTopX = sanitizeFrequencyTopX(
       frequencyDictionarySettings.topX,
       ctx.state.frequencyDictionaryTopX,
@@ -458,7 +492,8 @@ export function createSubtitleRenderer(ctx: RendererContext) {
       ctx.dom.secondarySubRoot.style.fontStyle = secondaryStyle.fontStyle;
     }
     if (secondaryStyle.backgroundColor) {
-      ctx.dom.secondarySubContainer.style.background = secondaryStyle.backgroundColor;
+      ctx.dom.secondarySubContainer.style.background =
+        secondaryStyle.backgroundColor;
     }
   }
 
diff --git a/src/renderer/utils/dom.ts b/src/renderer/utils/dom.ts
index 8cd998e..341abfb 100644
--- a/src/renderer/utils/dom.ts
+++ b/src/renderer/utils/dom.ts
@@ -77,8 +77,9 @@ export function resolveRendererDom(): RendererDom {
     subtitleRoot: getRequiredElement<HTMLElement>("subtitleRoot"),
     subtitleContainer: getRequiredElement<HTMLElement>("subtitleContainer"),
     overlay: getRequiredElement<HTMLElement>("overlay"),
-    secondarySubContainer:
-      getRequiredElement<HTMLElement>("secondarySubContainer"),
+    secondarySubContainer: getRequiredElement<HTMLElement>(
+      "secondarySubContainer",
+    ),
     secondarySubRoot: getRequiredElement<HTMLElement>("secondarySubRoot"),
 
     jimakuModal: getRequiredElement<HTMLDivElement>("jimakuModal"),
@@ -88,60 +89,89 @@ export function resolveRendererDom(): RendererDom {
     jimakuSearchButton: getRequiredElement<HTMLButtonElement>("jimakuSearch"),
     jimakuCloseButton: getRequiredElement<HTMLButtonElement>("jimakuClose"),
     jimakuStatus: getRequiredElement<HTMLDivElement>("jimakuStatus"),
-    jimakuEntriesSection: getRequiredElement<HTMLDivElement>("jimakuEntriesSection"),
+    jimakuEntriesSection: getRequiredElement<HTMLDivElement>(
+      "jimakuEntriesSection",
+    ),
     jimakuEntriesList: getRequiredElement<HTMLUListElement>("jimakuEntries"),
-    jimakuFilesSection: getRequiredElement<HTMLDivElement>("jimakuFilesSection"),
+    jimakuFilesSection:
+      getRequiredElement<HTMLDivElement>("jimakuFilesSection"),
     jimakuFilesList: getRequiredElement<HTMLUListElement>("jimakuFiles"),
     jimakuBroadenButton: getRequiredElement<HTMLButtonElement>("jimakuBroaden"),
 
     kikuModal: getRequiredElement<HTMLDivElement>("kikuFieldGroupingModal"),
     kikuCard1: getRequiredElement<HTMLDivElement>("kikuCard1"),
     kikuCard2: getRequiredElement<HTMLDivElement>("kikuCard2"),
-    kikuCard1Expression: getRequiredElement<HTMLDivElement>("kikuCard1Expression"),
-    kikuCard2Expression: getRequiredElement<HTMLDivElement>("kikuCard2Expression"),
+    kikuCard1Expression: getRequiredElement<HTMLDivElement>(
+      "kikuCard1Expression",
+    ),
+    kikuCard2Expression: getRequiredElement<HTMLDivElement>(
+      "kikuCard2Expression",
+    ),
     kikuCard1Sentence: getRequiredElement<HTMLDivElement>("kikuCard1Sentence"),
     kikuCard2Sentence: getRequiredElement<HTMLDivElement>("kikuCard2Sentence"),
     kikuCard1Meta: getRequiredElement<HTMLDivElement>("kikuCard1Meta"),
     kikuCard2Meta: getRequiredElement<HTMLDivElement>("kikuCard2Meta"),
-    kikuConfirmButton: getRequiredElement<HTMLButtonElement>("kikuConfirmButton"),
+    kikuConfirmButton:
+      getRequiredElement<HTMLButtonElement>("kikuConfirmButton"),
     kikuCancelButton: getRequiredElement<HTMLButtonElement>("kikuCancelButton"),
-    kikuDeleteDuplicateCheckbox:
-      getRequiredElement<HTMLInputElement>("kikuDeleteDuplicate"),
+    kikuDeleteDuplicateCheckbox: getRequiredElement<HTMLInputElement>(
+      "kikuDeleteDuplicate",
+    ),
     kikuSelectionStep: getRequiredElement<HTMLDivElement>("kikuSelectionStep"),
     kikuPreviewStep: getRequiredElement<HTMLDivElement>("kikuPreviewStep"),
     kikuPreviewJson: getRequiredElement<HTMLPreElement>("kikuPreviewJson"),
     kikuPreviewCompactButton:
       getRequiredElement<HTMLButtonElement>("kikuPreviewCompact"),
-    kikuPreviewFullButton: getRequiredElement<HTMLButtonElement>("kikuPreviewFull"),
+    kikuPreviewFullButton:
+      getRequiredElement<HTMLButtonElement>("kikuPreviewFull"),
     kikuPreviewError: getRequiredElement<HTMLDivElement>("kikuPreviewError"),
     kikuBackButton: getRequiredElement<HTMLButtonElement>("kikuBackButton"),
-    kikuFinalConfirmButton:
-      getRequiredElement<HTMLButtonElement>("kikuFinalConfirmButton"),
-    kikuFinalCancelButton:
-      getRequiredElement<HTMLButtonElement>("kikuFinalCancelButton"),
+    kikuFinalConfirmButton: getRequiredElement<HTMLButtonElement>(
+      "kikuFinalConfirmButton",
+    ),
+    kikuFinalCancelButton: getRequiredElement<HTMLButtonElement>(
+      "kikuFinalCancelButton",
+    ),
     kikuHint: getRequiredElement<HTMLDivElement>("kikuHint"),
 
-    runtimeOptionsModal: getRequiredElement<HTMLDivElement>("runtimeOptionsModal"),
-    runtimeOptionsClose: getRequiredElement<HTMLButtonElement>("runtimeOptionsClose"),
-    runtimeOptionsList: getRequiredElement<HTMLUListElement>("runtimeOptionsList"),
-    runtimeOptionsStatus: getRequiredElement<HTMLDivElement>("runtimeOptionsStatus"),
+    runtimeOptionsModal: getRequiredElement<HTMLDivElement>(
+      "runtimeOptionsModal",
+    ),
+    runtimeOptionsClose: getRequiredElement<HTMLButtonElement>(
+      "runtimeOptionsClose",
+    ),
+    runtimeOptionsList:
+      getRequiredElement<HTMLUListElement>("runtimeOptionsList"),
+    runtimeOptionsStatus: getRequiredElement<HTMLDivElement>(
+      "runtimeOptionsStatus",
+    ),
 
     subsyncModal: getRequiredElement<HTMLDivElement>("subsyncModal"),
     subsyncCloseButton: getRequiredElement<HTMLButtonElement>("subsyncClose"),
-    subsyncEngineAlass: getRequiredElement<HTMLInputElement>("subsyncEngineAlass"),
-    subsyncEngineFfsubsync:
-      getRequiredElement<HTMLInputElement>("subsyncEngineFfsubsync"),
-    subsyncSourceLabel: getRequiredElement<HTMLLabelElement>("subsyncSourceLabel"),
-    subsyncSourceSelect: getRequiredElement<HTMLSelectElement>("subsyncSourceSelect"),
+    subsyncEngineAlass:
+      getRequiredElement<HTMLInputElement>("subsyncEngineAlass"),
+    subsyncEngineFfsubsync: getRequiredElement<HTMLInputElement>(
+      "subsyncEngineFfsubsync",
+    ),
+    subsyncSourceLabel:
+      getRequiredElement<HTMLLabelElement>("subsyncSourceLabel"),
+    subsyncSourceSelect: getRequiredElement<HTMLSelectElement>(
+      "subsyncSourceSelect",
+    ),
     subsyncRunButton: getRequiredElement<HTMLButtonElement>("subsyncRun"),
     subsyncStatus: getRequiredElement<HTMLDivElement>("subsyncStatus"),
 
     sessionHelpModal: getRequiredElement<HTMLDivElement>("sessionHelpModal"),
     sessionHelpClose: getRequiredElement<HTMLButtonElement>("sessionHelpClose"),
-    sessionHelpShortcut: getRequiredElement<HTMLDivElement>("sessionHelpShortcut"),
-    sessionHelpWarning: getRequiredElement<HTMLDivElement>("sessionHelpWarning"),
+    sessionHelpShortcut: getRequiredElement<HTMLDivElement>(
+      "sessionHelpShortcut",
+    ),
+    sessionHelpWarning:
+      getRequiredElement<HTMLDivElement>("sessionHelpWarning"),
     sessionHelpStatus: getRequiredElement<HTMLDivElement>("sessionHelpStatus"),
-    sessionHelpFilter: getRequiredElement<HTMLInputElement>("sessionHelpFilter"),
-    sessionHelpContent: getRequiredElement<HTMLDivElement>("sessionHelpContent"),
+    sessionHelpFilter:
+      getRequiredElement<HTMLInputElement>("sessionHelpFilter"),
+    sessionHelpContent:
+      getRequiredElement<HTMLDivElement>("sessionHelpContent"),
   };
 }
diff --git a/src/subsync/engines.ts b/src/subsync/engines.ts
index 338ede0..a8afb01 100644
--- a/src/subsync/engines.ts
+++ b/src/subsync/engines.ts
@@ -22,7 +22,10 @@ export interface SubsyncEngineExecutionContext {
     alassPath: string;
     ffsubsyncPath: string;
   };
-  runCommand: (command: string, args: string[]) => Promise<SubsyncCommandResult>;
+  runCommand: (
+    command: string,
+    args: string[],
+  ) => Promise<SubsyncCommandResult>;
 }
 
 export interface SubsyncEngineProvider {
@@ -34,7 +37,10 @@ export interface SubsyncEngineProvider {
 
 type SubsyncEngineProviderFactory = () => SubsyncEngineProvider;
 
-const subsyncEngineProviderFactories = new Map<SubsyncEngine, SubsyncEngineProviderFactory>();
+const subsyncEngineProviderFactories = new Map<
+  SubsyncEngine,
+  SubsyncEngineProviderFactory
+>();
 
 export function registerSubsyncEngineProvider(
   engine: SubsyncEngine,
diff --git a/src/subtitle/pipeline.ts b/src/subtitle/pipeline.ts
index 43df702..026e884 100644
--- a/src/subtitle/pipeline.ts
+++ b/src/subtitle/pipeline.ts
@@ -33,7 +33,10 @@ export class SubtitlePipeline {
     const tokenizeText = normalizeTokenizerInput(displayText);
 
     try {
-      const tokens = await tokenizeStage(this.deps.getTokenizer(), tokenizeText);
+      const tokens = await tokenizeStage(
+        this.deps.getTokenizer(),
+        tokenizeText,
+      );
       const mergedTokens = mergeStage(this.deps.getTokenMerger(), tokens);
       if (!mergedTokens || mergedTokens.length === 0) {
         return { text: displayText, tokens: null };
diff --git a/src/subtitle/stages/normalize.ts b/src/subtitle/stages/normalize.ts
index 4c49d73..d9ed3ec 100644
--- a/src/subtitle/stages/normalize.ts
+++ b/src/subtitle/stages/normalize.ts
@@ -7,8 +7,5 @@ export function normalizeDisplayText(text: string): string {
 }
 
 export function normalizeTokenizerInput(displayText: string): string {
-  return displayText
-    .replace(/\n/g, " ")
-    .replace(/\s+/g, " ")
-    .trim();
+  return displayText.replace(/\n/g, " ").replace(/\s+/g, " ").trim();
 }
diff --git a/src/token-merger.ts b/src/token-merger.ts
index 192f015..9f12d34 100644
--- a/src/token-merger.ts
+++ b/src/token-merger.ts
@@ -216,46 +216,46 @@ export function mergeTokens(
         }
         return mergedHeadword;
       })();
-        result.push({
-          surface: prev.surface + token.word,
-          reading: prev.reading + tokenReading,
-          headword: prev.headword,
-          startPos: prev.startPos,
-          endPos: end,
-          partOfSpeech: prev.partOfSpeech,
-          pos1: prev.pos1 ?? token.pos1,
-          pos2: prev.pos2 ?? token.pos2,
-          pos3: prev.pos3 ?? token.pos3,
-          isMerged: true,
-          isKnown: headwordForKnownMatch
-            ? isKnownWord(headwordForKnownMatch)
-            : false,
-          isNPlusOneTarget: false,
-        });
-      } else {
-        const headwordForKnownMatch = (() => {
-          if (knownWordMatchMode === "surface") {
-            return token.word;
-          }
-          return token.headword;
-        })();
-        result.push({
-          surface: token.word,
-          reading: tokenReading,
-          headword: token.headword,
-          startPos: start,
-          endPos: end,
-          partOfSpeech: token.partOfSpeech,
-          pos1: token.pos1,
-          pos2: token.pos2,
-          pos3: token.pos3,
-          isMerged: false,
-          isKnown: headwordForKnownMatch
-            ? isKnownWord(headwordForKnownMatch)
-            : false,
-          isNPlusOneTarget: false,
-        });
-      }
+      result.push({
+        surface: prev.surface + token.word,
+        reading: prev.reading + tokenReading,
+        headword: prev.headword,
+        startPos: prev.startPos,
+        endPos: end,
+        partOfSpeech: prev.partOfSpeech,
+        pos1: prev.pos1 ?? token.pos1,
+        pos2: prev.pos2 ?? token.pos2,
+        pos3: prev.pos3 ?? token.pos3,
+        isMerged: true,
+        isKnown: headwordForKnownMatch
+          ? isKnownWord(headwordForKnownMatch)
+          : false,
+        isNPlusOneTarget: false,
+      });
+    } else {
+      const headwordForKnownMatch = (() => {
+        if (knownWordMatchMode === "surface") {
+          return token.word;
+        }
+        return token.headword;
+      })();
+      result.push({
+        surface: token.word,
+        reading: tokenReading,
+        headword: token.headword,
+        startPos: start,
+        endPos: end,
+        partOfSpeech: token.partOfSpeech,
+        pos1: token.pos1,
+        pos2: token.pos2,
+        pos3: token.pos3,
+        isMerged: false,
+        isKnown: headwordForKnownMatch
+          ? isKnownWord(headwordForKnownMatch)
+          : false,
+        isNPlusOneTarget: false,
+      });
+    }
 
     lastStandaloneToken = token;
   }
@@ -263,7 +263,15 @@ export function mergeTokens(
   return result;
 }
 
-const SENTENCE_BOUNDARY_SURFACES = new Set(["。", "？", "！", "?", "!", "…", "\u2026"]);
+const SENTENCE_BOUNDARY_SURFACES = new Set([
+  "。",
+  "？",
+  "！",
+  "?",
+  "!",
+  "…",
+  "\u2026",
+]);
 
 export function isNPlusOneCandidateToken(token: MergedToken): boolean {
   if (token.isKnown) {
diff --git a/src/token-mergers/index.ts b/src/token-mergers/index.ts
index 260b843..e7e46fb 100644
--- a/src/token-mergers/index.ts
+++ b/src/token-mergers/index.ts
@@ -8,7 +8,10 @@ export interface TokenMergerProvider {
 
 type TokenMergerProviderFactory = () => TokenMergerProvider;
 
-const tokenMergerProviderFactories = new Map<string, TokenMergerProviderFactory>();
+const tokenMergerProviderFactories = new Map<
+  string,
+  TokenMergerProviderFactory
+>();
 
 export function registerTokenMergerProvider(
   id: string,
diff --git a/src/translators/index.ts b/src/translators/index.ts
index 64bcb1a..2bf7fbd 100644
--- a/src/translators/index.ts
+++ b/src/translators/index.ts
@@ -17,7 +17,10 @@ export interface TranslationProvider {
 
 type TranslationProviderFactory = () => TranslationProvider;
 
-const translationProviderFactories = new Map<string, TranslationProviderFactory>();
+const translationProviderFactories = new Map<
+  string,
+  TranslationProviderFactory
+>();
 
 export function registerTranslationProvider(
   id: string,
@@ -94,9 +97,8 @@ function registerDefaultTranslationProviders(): void {
         },
       );
 
-      const content = (response.data as { choices?: unknown[] })?.choices?.[0] as
-        | { message?: { content?: unknown } }
-        | undefined;
+      const content = (response.data as { choices?: unknown[] })
+        ?.choices?.[0] as { message?: { content?: unknown } } | undefined;
       const translated = extractAiText(content?.message?.content);
       return translated || null;
     },
diff --git a/src/window-trackers/hyprland-tracker.ts b/src/window-trackers/hyprland-tracker.ts
index d0fc208..4d03100 100644
--- a/src/window-trackers/hyprland-tracker.ts
+++ b/src/window-trackers/hyprland-tracker.ts
@@ -136,7 +136,9 @@ export class HyprlandWindowTracker extends BaseWindowTracker {
       }
 
       if (
-        commandLine.includes(`--input-ipc-server=${this.targetMpvSocketPath}`) ||
+        commandLine.includes(
+          `--input-ipc-server=${this.targetMpvSocketPath}`,
+        ) ||
         commandLine.includes(`--input-ipc-server ${this.targetMpvSocketPath}`)
       ) {
         return mpvWindow;
diff --git a/src/window-trackers/index.ts b/src/window-trackers/index.ts
index a89cc60..397fcae 100644
--- a/src/window-trackers/index.ts
+++ b/src/window-trackers/index.ts
@@ -69,17 +69,11 @@ export function createWindowTracker(
         targetMpvSocketPath?.trim() || undefined,
       );
     case "sway":
-      return new SwayWindowTracker(
-        targetMpvSocketPath?.trim() || undefined,
-      );
+      return new SwayWindowTracker(targetMpvSocketPath?.trim() || undefined);
     case "x11":
-      return new X11WindowTracker(
-        targetMpvSocketPath?.trim() || undefined,
-      );
+      return new X11WindowTracker(targetMpvSocketPath?.trim() || undefined);
     case "macos":
-      return new MacOSWindowTracker(
-        targetMpvSocketPath?.trim() || undefined,
-      );
+      return new MacOSWindowTracker(targetMpvSocketPath?.trim() || undefined);
     default:
       log.warn("No supported compositor detected. Window tracking disabled.");
       return null;
diff --git a/src/window-trackers/sway-tracker.ts b/src/window-trackers/sway-tracker.ts
index eecc560..af4790e 100644
--- a/src/window-trackers/sway-tracker.ts
+++ b/src/window-trackers/sway-tracker.ts
@@ -83,9 +83,10 @@ export class SwayWindowTracker extends BaseWindowTracker {
       return windows[0] || null;
     }
 
-    return windows.find((candidate) =>
-      this.isWindowForTargetSocket(candidate),
-    ) || null;
+    return (
+      windows.find((candidate) => this.isWindowForTargetSocket(candidate)) ||
+      null
+    );
   }
 
   private isWindowForTargetSocket(node: SwayNode): boolean {