feat: expand hot-reload to logging, jimaku, subsync, and Anki sub-fields

- Mark logging.level, stats keys, jimaku.*, subsync.*, and granular ankiConnect fields (knownWords, nPlusOne, fields, isLapis, isKiku, behavior) as hot-reloadable
- Refactor classifyConfigHotReloadDiff to path-walk diffing instead of per-key branches
- Wire setLogLevel, invalidateTokenizationCache, refreshSubtitlePrefetch, refreshCurrentSubtitle into hot-reload applied handler
- Exclude ai.* and ankiConnect.ai.* prefixes from config window; hide fields.translation
- Update docs and config.example.jsonc hot-reload annotations

changes/config-settings-window.md

@@ -4,3 +4,5 @@ area: config
 - Added a dedicated Configuration window with launcher entry points via `subminer --config` and `subminer config`.
 - Fixed the Configuration window preload so launcher-opened windows can initialize even when Electron sandboxing is active.
 - Kept config-window startup lightweight by skipping AniList token refresh and automatic update polling.
+- Marked safe live config options in the Configuration window and expanded hot reload for stats keys, logging level, Jimaku, Subsync, YouTube language defaults, Anki media/sentence/misc field mappings, sentence card model, and selected Anki annotation/runtime options.
+- Hid AI and translation fields from the Configuration window while keeping them supported in config files.

config.example.jsonc

@@ -46,6 +46,7 @@
   // Logging
   // Controls logging verbosity.
   // Set to debug for full runtime diagnostics.
+  // Hot-reload: logging.level applies live while SubMiner is running.
   // ==========================================
   "logging": {
     "level": "info" // Minimum log level for runtime logging. Values: debug | info | warn | error
@@ -337,6 +338,7 @@
   // ==========================================
   // Auto Subtitle Sync
   // Subsync engine and executable paths.
+  // Hot-reload: subsync changes apply to the next subtitle sync run.
   // ==========================================
   "subsync": {
     "defaultMode": "auto", // Subsync default mode. Values: auto | manual
@@ -470,7 +472,7 @@
   // ==========================================
   // AnkiConnect Integration
   // Automatic Anki updates and media generation options.
-  // Hot-reload: ankiConnect.ai.enabled updates live while SubMiner is running.
+  // Hot-reload: ankiConnect.ai.enabled, knownWords, nPlusOne, fields.word/audio/image/sentence/miscInfo, behavior.autoUpdateNewCards, isLapis.sentenceCardModel, and isKiku.fieldGrouping update live while SubMiner is running.
   // Shared AI provider transport settings are read from top-level ai and typically require restart.
   // Most other AnkiConnect settings still require restart.
   // ==========================================
@@ -550,6 +552,7 @@
   // ==========================================
   // Jimaku
   // Jimaku API configuration and defaults.
+  // Hot-reload: Jimaku changes apply to the next Jimaku request.
   // ==========================================
   "jimaku": {
     "apiBaseUrl": "https://jimaku.cc", // Base URL of the Jimaku subtitle search API.
@@ -560,6 +563,7 @@
   // ==========================================
   // YouTube Playback Settings
   // Defaults for managed subtitle language preferences and YouTube subtitle loading.
+  // Hot-reload: primarySubLanguages applies to the next YouTube subtitle load.
   // ==========================================
   "youtube": {
     "primarySubLanguages": [

docs-site/configuration.md

@@ -99,7 +99,28 @@ Hot-reloadable fields:
 - `keybindings`
 - `shortcuts`
 - `secondarySub.defaultMode`
-- `ankiConnect.ai`
+- `stats.toggleKey`
+- `stats.markWatchedKey`
+- `logging.level`
+- `youtube.primarySubLanguages`
+- `jimaku.*`
+- `subsync.*`
+- `ankiConnect.ai.enabled`
+- `ankiConnect.behavior.autoUpdateNewCards`
+- `ankiConnect.knownWords.highlightEnabled`
+- `ankiConnect.knownWords.refreshMinutes`
+- `ankiConnect.knownWords.addMinedWordsImmediately`
+- `ankiConnect.knownWords.matchMode`
+- `ankiConnect.knownWords.decks`
+- `ankiConnect.nPlusOne.enabled`
+- `ankiConnect.nPlusOne.minSentenceWords`
+- `ankiConnect.fields.word`
+- `ankiConnect.fields.audio`
+- `ankiConnect.fields.image`
+- `ankiConnect.fields.sentence`
+- `ankiConnect.fields.miscInfo`
+- `ankiConnect.isLapis.sentenceCardModel`
+- `ankiConnect.isKiku.fieldGrouping`
 
 When these values change, SubMiner applies them live. Invalid config edits are rejected and the previous valid runtime config remains active.
 
@@ -107,6 +128,7 @@ Restart-required changes:
 
 - Any other config sections still require restart.
 - Shared top-level `ai` provider settings still require restart.
+- AnkiConnect transport/proxy/media/deck/tag fields still require restart unless listed above.
 - SubMiner shows an on-screen/system notification listing restart-required sections when they change.
 
 ### Configuration Options Overview

docs-site/public/config.example.jsonc

@@ -46,6 +46,7 @@
   // Logging
   // Controls logging verbosity.
   // Set to debug for full runtime diagnostics.
+  // Hot-reload: logging.level applies live while SubMiner is running.
   // ==========================================
   "logging": {
     "level": "info" // Minimum log level for runtime logging. Values: debug | info | warn | error
@@ -337,6 +338,7 @@
   // ==========================================
   // Auto Subtitle Sync
   // Subsync engine and executable paths.
+  // Hot-reload: subsync changes apply to the next subtitle sync run.
   // ==========================================
   "subsync": {
     "defaultMode": "auto", // Subsync default mode. Values: auto | manual
@@ -470,7 +472,7 @@
   // ==========================================
   // AnkiConnect Integration
   // Automatic Anki updates and media generation options.
-  // Hot-reload: ankiConnect.ai.enabled updates live while SubMiner is running.
+  // Hot-reload: ankiConnect.ai.enabled, knownWords, nPlusOne, fields.word/audio/image/sentence/miscInfo, behavior.autoUpdateNewCards, isLapis.sentenceCardModel, and isKiku.fieldGrouping update live while SubMiner is running.
   // Shared AI provider transport settings are read from top-level ai and typically require restart.
   // Most other AnkiConnect settings still require restart.
   // ==========================================
@@ -550,6 +552,7 @@
   // ==========================================
   // Jimaku
   // Jimaku API configuration and defaults.
+  // Hot-reload: Jimaku changes apply to the next Jimaku request.
   // ==========================================
   "jimaku": {
     "apiBaseUrl": "https://jimaku.cc", // Base URL of the Jimaku subtitle search API.
@@ -560,6 +563,7 @@
   // ==========================================
   // YouTube Playback Settings
   // Defaults for managed subtitle language preferences and YouTube subtitle loading.
+  // Hot-reload: primarySubLanguages applies to the next YouTube subtitle load.
   // ==========================================
   "youtube": {
     "primarySubLanguages": [

src/config/definitions/template-sections.ts

@@ -33,6 +33,7 @@ const CORE_TEMPLATE_SECTIONS: ConfigTemplateSection[] = [
   {
     title: 'Logging',
     description: ['Controls logging verbosity.', 'Set to debug for full runtime diagnostics.'],
+    notes: ['Hot-reload: logging.level applies live while SubMiner is running.'],
     key: 'logging',
   },
   {
@@ -91,6 +92,7 @@ const CORE_TEMPLATE_SECTIONS: ConfigTemplateSection[] = [
   {
     title: 'Auto Subtitle Sync',
     description: ['Subsync engine and executable paths.'],
+    notes: ['Hot-reload: subsync changes apply to the next subtitle sync run.'],
     key: 'subsync',
   },
   {
@@ -127,7 +129,7 @@ const INTEGRATION_TEMPLATE_SECTIONS: ConfigTemplateSection[] = [
     title: 'AnkiConnect Integration',
     description: ['Automatic Anki updates and media generation options.'],
     notes: [
-      'Hot-reload: ankiConnect.ai.enabled updates live while SubMiner is running.',
+      'Hot-reload: ankiConnect.ai.enabled, knownWords, nPlusOne, fields.word/audio/image/sentence/miscInfo, behavior.autoUpdateNewCards, isLapis.sentenceCardModel, and isKiku.fieldGrouping update live while SubMiner is running.',
       'Shared AI provider transport settings are read from top-level ai and typically require restart.',
       'Most other AnkiConnect settings still require restart.',
     ],
@@ -136,6 +138,7 @@ const INTEGRATION_TEMPLATE_SECTIONS: ConfigTemplateSection[] = [
   {
     title: 'Jimaku',
     description: ['Jimaku API configuration and defaults.'],
+    notes: ['Hot-reload: Jimaku changes apply to the next Jimaku request.'],
     key: 'jimaku',
   },
   {
@@ -143,6 +146,7 @@ const INTEGRATION_TEMPLATE_SECTIONS: ConfigTemplateSection[] = [
     description: [
       'Defaults for managed subtitle language preferences and YouTube subtitle loading.',
     ],
+    notes: ['Hot-reload: primarySubLanguages applies to the next YouTube subtitle load.'],
     key: 'youtube',
   },
   {

src/config/settings/registry.test.ts

@@ -160,6 +160,17 @@ test('settings registry puts feature toggles first, then other toggles alphabeti
 test('settings registry hides app-managed and inactive config surfaces', () => {
   const paths = new Set(fields.map((candidate) => candidate.configPath));
   for (const hiddenPath of [
+    'ai.enabled',
+    'ai.apiKey',
+    'ai.apiKeyCommand',
+    'ai.model',
+    'ai.baseUrl',
+    'ai.systemPrompt',
+    'ai.requestTimeoutMs',
+    'ankiConnect.ai.enabled',
+    'ankiConnect.ai.model',
+    'ankiConnect.ai.systemPrompt',
+    'ankiConnect.fields.translation',
     'controller.bindings',
     'controller.preferredGamepadId',
     'controller.preferredGamepadLabel',
@@ -176,3 +187,45 @@ test('settings registry hides app-managed and inactive config surfaces', () => {
   }
   assert.equal(field('anilist.characterDictionary.enabled').section, 'Character Dictionary');
 });
+
+test('settings registry marks safe live config paths as hot-reloadable', () => {
+  for (const path of [
+    'stats.toggleKey',
+    'stats.markWatchedKey',
+    'logging.level',
+    'youtube.primarySubLanguages',
+    'jimaku.apiBaseUrl',
+    'jimaku.languagePreference',
+    'jimaku.maxEntryResults',
+    'subsync.defaultMode',
+    'ankiConnect.behavior.autoUpdateNewCards',
+    'ankiConnect.knownWords.highlightEnabled',
+    'ankiConnect.knownWords.refreshMinutes',
+    'ankiConnect.knownWords.addMinedWordsImmediately',
+    'ankiConnect.knownWords.matchMode',
+    'ankiConnect.knownWords.decks',
+    'ankiConnect.nPlusOne.enabled',
+    'ankiConnect.nPlusOne.minSentenceWords',
+    'ankiConnect.fields.word',
+    'ankiConnect.fields.audio',
+    'ankiConnect.fields.image',
+    'ankiConnect.fields.sentence',
+    'ankiConnect.fields.miscInfo',
+    'ankiConnect.isLapis.sentenceCardModel',
+    'ankiConnect.isKiku.fieldGrouping',
+  ]) {
+    assert.equal(field(path).restartBehavior, 'hot-reload', path);
+  }
+});
+
+test('settings registry keeps unsafe config siblings restart-required', () => {
+  for (const path of [
+    'stats.serverPort',
+    'ankiConnect.url',
+    'ankiConnect.proxy.enabled',
+    'mpv.socketPath',
+    'websocket.port',
+  ]) {
+    assert.equal(field(path).restartBehavior, 'restart', path);
+  }
+});

src/config/settings/registry.ts

@@ -57,6 +57,7 @@ export const LEGACY_HIDDEN_CONFIG_PATHS = [
   'ankiConnect.behavior.nPlusOneMatchMode',
   'ankiConnect.isLapis.sentenceCardSentenceField',
   'ankiConnect.isLapis.sentenceCardAudioField',
+  'ankiConnect.fields.translation',
   'controller.bindings',
   'controller.preferredGamepadId',
   'controller.preferredGamepadLabel',
@@ -75,7 +76,12 @@ export const LEGACY_HIDDEN_CONFIG_PATHS = [
   'jellyfin.recentServers',
 ] as const;
 
-const EXCLUDED_PREFIXES = ['controller.buttonIndices', 'youtubeSubgen'] as const;
+const EXCLUDED_PREFIXES = [
+  'ai',
+  'ankiConnect.ai',
+  'controller.buttonIndices',
+  'youtubeSubgen',
+] as const;
 
 const JSON_OBJECT_FIELDS = new Set([
   'keybindings',
@@ -610,9 +616,28 @@ function restartBehaviorForPath(path: string): ConfigSettingsRestartBehavior {
     pathStartsWith(path, 'subtitleStyle') ||
     pathStartsWith(path, 'subtitleSidebar') ||
     path === 'secondarySub.defaultMode' ||
-    pathStartsWith(path, 'ankiConnect.ai') ||
+    path === 'ankiConnect.ai.enabled' ||
+    path === 'ankiConnect.behavior.autoUpdateNewCards' ||
+    path === 'ankiConnect.knownWords.highlightEnabled' ||
+    path === 'ankiConnect.knownWords.refreshMinutes' ||
+    path === 'ankiConnect.knownWords.addMinedWordsImmediately' ||
+    path === 'ankiConnect.knownWords.matchMode' ||
+    path === 'ankiConnect.knownWords.decks' ||
+    path === 'ankiConnect.nPlusOne.enabled' ||
+    path === 'ankiConnect.nPlusOne.minSentenceWords' ||
+    path === 'ankiConnect.fields.word' ||
+    path === 'ankiConnect.fields.audio' ||
+    path === 'ankiConnect.fields.image' ||
+    path === 'ankiConnect.fields.sentence' ||
+    path === 'ankiConnect.fields.miscInfo' ||
+    path === 'ankiConnect.isLapis.sentenceCardModel' ||
+    path === 'ankiConnect.isKiku.fieldGrouping' ||
     path === 'stats.toggleKey' ||
-    path === 'stats.markWatchedKey'
+    path === 'stats.markWatchedKey' ||
+    path === 'logging.level' ||
+    path === 'youtube.primarySubLanguages' ||
+    pathStartsWith(path, 'jimaku') ||
+    pathStartsWith(path, 'subsync')
   ) {
     return 'hot-reload';
   }

src/core/services/config-hot-reload.test.ts

@@ -18,6 +18,78 @@ test('classifyConfigHotReloadDiff separates hot and restart-required fields', ()
   assert.deepEqual(diff.restartRequiredFields, ['websocket']);
 });
 
+test('classifyConfigHotReloadDiff treats safe nested config paths as hot-reloadable', () => {
+  const prev = deepCloneConfig(DEFAULT_CONFIG);
+  const next = deepCloneConfig(DEFAULT_CONFIG);
+  next.stats.toggleKey = 'F8';
+  next.stats.markWatchedKey = 'F9';
+  next.logging.level = 'debug';
+  next.youtube.primarySubLanguages = ['ja', 'en'];
+  next.jimaku.maxEntryResults = prev.jimaku.maxEntryResults + 1;
+  next.subsync.defaultMode = prev.subsync.defaultMode === 'auto' ? 'manual' : 'auto';
+  next.ankiConnect.behavior.autoUpdateNewCards = !prev.ankiConnect.behavior.autoUpdateNewCards;
+  next.ankiConnect.knownWords.highlightEnabled = !prev.ankiConnect.knownWords.highlightEnabled;
+  next.ankiConnect.knownWords.refreshMinutes = prev.ankiConnect.knownWords.refreshMinutes + 5;
+  next.ankiConnect.knownWords.addMinedWordsImmediately =
+    !prev.ankiConnect.knownWords.addMinedWordsImmediately;
+  next.ankiConnect.knownWords.matchMode =
+    prev.ankiConnect.knownWords.matchMode === 'headword' ? 'surface' : 'headword';
+  next.ankiConnect.knownWords.decks = { Anime: ['Mining'] };
+  next.ankiConnect.nPlusOne.enabled = !prev.ankiConnect.nPlusOne.enabled;
+  next.ankiConnect.nPlusOne.minSentenceWords = prev.ankiConnect.nPlusOne.minSentenceWords + 1;
+  next.ankiConnect.fields.word = 'Vocabulary';
+  next.ankiConnect.fields.audio = 'SentenceAudioCustom';
+  next.ankiConnect.fields.image = 'ScreenshotCustom';
+  next.ankiConnect.fields.sentence = 'SentenceCustom';
+  next.ankiConnect.fields.miscInfo = 'MiscInfoCustom';
+  next.ankiConnect.isLapis.sentenceCardModel = 'Sentence Card Custom';
+  next.ankiConnect.isKiku.fieldGrouping =
+    prev.ankiConnect.isKiku.fieldGrouping === 'auto' ? 'manual' : 'auto';
+
+  const diff = classifyConfigHotReloadDiff(prev, next);
+
+  assert.deepEqual(
+    new Set(diff.hotReloadFields),
+    new Set([
+      'stats.toggleKey',
+      'stats.markWatchedKey',
+      'logging.level',
+      'youtube.primarySubLanguages',
+      'jimaku.maxEntryResults',
+      'subsync.defaultMode',
+      'ankiConnect.behavior.autoUpdateNewCards',
+      'ankiConnect.knownWords.highlightEnabled',
+      'ankiConnect.knownWords.refreshMinutes',
+      'ankiConnect.knownWords.addMinedWordsImmediately',
+      'ankiConnect.knownWords.matchMode',
+      'ankiConnect.knownWords.decks',
+      'ankiConnect.nPlusOne.enabled',
+      'ankiConnect.nPlusOne.minSentenceWords',
+      'ankiConnect.fields.word',
+      'ankiConnect.fields.audio',
+      'ankiConnect.fields.image',
+      'ankiConnect.fields.sentence',
+      'ankiConnect.fields.miscInfo',
+      'ankiConnect.isLapis.sentenceCardModel',
+      'ankiConnect.isKiku.fieldGrouping',
+    ]),
+  );
+  assert.deepEqual(diff.restartRequiredFields, []);
+});
+
+test('classifyConfigHotReloadDiff keeps unsafe nested siblings restart-required', () => {
+  const prev = deepCloneConfig(DEFAULT_CONFIG);
+  const next = deepCloneConfig(DEFAULT_CONFIG);
+  next.stats.serverPort = prev.stats.serverPort + 1;
+  next.ankiConnect.url = 'http://127.0.0.1:9999';
+  next.ankiConnect.ai.model = 'openrouter/new-model';
+
+  const diff = classifyConfigHotReloadDiff(prev, next);
+
+  assert.deepEqual(diff.hotReloadFields, []);
+  assert.deepEqual(diff.restartRequiredFields, ['ankiConnect', 'stats']);
+});
+
 test('config hot reload runtime debounces rapid watch events', () => {
   let watchedChangeCallback: (() => void) | null = null;
   const pendingTimers = new Map<number, () => void>();

src/core/services/config-hot-reload.ts

@@ -29,27 +29,84 @@ function isEqual(a: unknown, b: unknown): boolean {
   return JSON.stringify(a) === JSON.stringify(b);
 }
 
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return value !== null && typeof value === 'object' && !Array.isArray(value);
+}
+
+function pathStartsWith(path: string, prefix: string): boolean {
+  return path === prefix || path.startsWith(`${prefix}.`);
+}
+
+function collectChangedPaths(prev: unknown, next: unknown, prefix = ''): string[] {
+  if (isEqual(prev, next)) {
+    return [];
+  }
+
+  if (!isRecord(prev) || !isRecord(next)) {
+    return prefix ? [prefix] : [];
+  }
+
+  const keys = new Set([...Object.keys(prev), ...Object.keys(next)]);
+  return [...keys].flatMap((key) =>
+    collectChangedPaths(prev[key], next[key], prefix ? `${prefix}.${key}` : key),
+  );
+}
+
+const HOT_RELOAD_ROOTS = ['subtitleStyle', 'keybindings', 'shortcuts', 'subtitleSidebar'] as const;
+
+const HOT_RELOAD_EXACT_OR_PREFIX_PATHS = [
+  'secondarySub.defaultMode',
+  'ankiConnect.ai.enabled',
+  'stats.toggleKey',
+  'stats.markWatchedKey',
+  'logging.level',
+  'youtube.primarySubLanguages',
+  'jimaku',
+  'subsync',
+  'ankiConnect.behavior.autoUpdateNewCards',
+  'ankiConnect.knownWords.highlightEnabled',
+  'ankiConnect.knownWords.refreshMinutes',
+  'ankiConnect.knownWords.addMinedWordsImmediately',
+  'ankiConnect.knownWords.matchMode',
+  'ankiConnect.knownWords.decks',
+  'ankiConnect.nPlusOne.enabled',
+  'ankiConnect.nPlusOne.minSentenceWords',
+  'ankiConnect.fields.word',
+  'ankiConnect.fields.audio',
+  'ankiConnect.fields.image',
+  'ankiConnect.fields.sentence',
+  'ankiConnect.fields.miscInfo',
+  'ankiConnect.isLapis.sentenceCardModel',
+  'ankiConnect.isKiku.fieldGrouping',
+] as const;
+
+function hotReloadFieldForChangedPath(path: string): string | null {
+  for (const root of HOT_RELOAD_ROOTS) {
+    if (pathStartsWith(path, root)) {
+      return root;
+    }
+  }
+
+  for (const hotPath of HOT_RELOAD_EXACT_OR_PREFIX_PATHS) {
+    if (pathStartsWith(path, hotPath)) {
+      return hotPath === 'jimaku' || hotPath === 'subsync' ? path : hotPath;
+    }
+  }
+
+  return null;
+}
+
 function classifyDiff(prev: ResolvedConfig, next: ResolvedConfig): ConfigHotReloadDiff {
   const hotReloadFields: string[] = [];
   const restartRequiredFields: string[] = [];
+  const hotReloadFieldSet = new Set<string>();
+  const changedPaths = collectChangedPaths(prev, next);
 
-  if (!isEqual(prev.subtitleStyle, next.subtitleStyle)) {
-    hotReloadFields.push('subtitleStyle');
-  }
-  if (!isEqual(prev.keybindings, next.keybindings)) {
-    hotReloadFields.push('keybindings');
-  }
-  if (!isEqual(prev.shortcuts, next.shortcuts)) {
-    hotReloadFields.push('shortcuts');
-  }
-  if (!isEqual(prev.subtitleSidebar, next.subtitleSidebar)) {
-    hotReloadFields.push('subtitleSidebar');
-  }
-  if (prev.secondarySub.defaultMode !== next.secondarySub.defaultMode) {
-    hotReloadFields.push('secondarySub.defaultMode');
-  }
-  if (!isEqual(prev.ankiConnect.ai, next.ankiConnect.ai)) {
-    hotReloadFields.push('ankiConnect.ai');
+  for (const path of changedPaths) {
+    const hotReloadField = hotReloadFieldForChangedPath(path);
+    if (hotReloadField) {
+      hotReloadFieldSet.add(hotReloadField);
+    }
   }
 
   const keys = new Set([
@@ -67,37 +124,16 @@ function classifyDiff(prev: ResolvedConfig, next: ResolvedConfig): ConfigHotRelo
       continue;
     }
 
-    if (key === 'secondarySub') {
-      const normalizedPrev = {
-        ...prev.secondarySub,
-        defaultMode: next.secondarySub.defaultMode,
-      };
-      if (!isEqual(normalizedPrev, next.secondarySub)) {
-        restartRequiredFields.push('secondarySub');
-      }
-      continue;
-    }
-
-    if (key === 'ankiConnect') {
-      const normalizedPrev = {
-        ...prev.ankiConnect,
-        ai: {
-          enabled: next.ankiConnect.ai.enabled,
-          model: prev.ankiConnect.ai.model,
-          systemPrompt: prev.ankiConnect.ai.systemPrompt,
-        },
-      };
-      if (!isEqual(normalizedPrev, next.ankiConnect)) {
-        restartRequiredFields.push('ankiConnect');
-      }
-      continue;
-    }
-
-    if (!isEqual(prev[key], next[key])) {
+    const changedPathsForKey = changedPaths.filter((path) => pathStartsWith(path, String(key)));
+    const hasRestartRequiredChange = changedPathsForKey.some(
+      (path) => !hotReloadFieldForChangedPath(path),
+    );
+    if (hasRestartRequiredChange) {
       restartRequiredFields.push(String(key));
     }
   }
 
+  hotReloadFields.push(...hotReloadFieldSet);
   return { hotReloadFields, restartRequiredFields };
 }
 

src/main.ts

@@ -1777,6 +1777,18 @@ const buildConfigHotReloadAppliedMainDepsHandler = createBuildConfigHotReloadApp
         appState.ankiIntegration.applyRuntimeConfigPatch(patch);
       }
     },
+    invalidateTokenizationCache: () => {
+      subtitleProcessingController.invalidateTokenizationCache();
+    },
+    refreshSubtitlePrefetch: () => {
+      subtitlePrefetchService?.onSeek(lastObservedTimePos);
+    },
+    refreshCurrentSubtitle: () => {
+      subtitleProcessingController.refreshCurrentSubtitle(appState.currentSubText);
+    },
+    setLogLevel: (level) => {
+      setLogLevel(level, 'config');
+    },
   },
 );
 const applyConfigHotReloadDiff = createConfigHotReloadAppliedHandler(

src/main/runtime/config-hot-reload-handlers.test.ts

@@ -11,7 +11,7 @@ import {
 test('createConfigHotReloadAppliedHandler runs all hot-reload effects', () => {
   const config = deepCloneConfig(DEFAULT_CONFIG);
   const calls: string[] = [];
-  const ankiPatches: Array<{ enabled: boolean }> = [];
+  const ankiPatches: unknown[] = [];
   const sessionBindingWarnings: string[][] = [];
 
   const applyHotReload = createConfigHotReloadAppliedHandler({
@@ -25,7 +25,7 @@ test('createConfigHotReloadAppliedHandler runs all hot-reload effects', () => {
     broadcastToOverlayWindows: (channel, payload) =>
       calls.push(`broadcast:${channel}:${typeof payload === 'string' ? payload : 'object'}`),
     applyAnkiRuntimeConfigPatch: (patch) => {
-      ankiPatches.push({ enabled: patch.ai });
+      ankiPatches.push(patch);
     },
   });
 
@@ -48,7 +48,7 @@ test('createConfigHotReloadAppliedHandler runs all hot-reload effects', () => {
   assert.ok(calls.includes(`set:secondary:${config.secondarySub.defaultMode}`));
   assert.ok(calls.some((entry) => entry.startsWith('broadcast:secondary-subtitle:mode:')));
   assert.ok(calls.includes('broadcast:config:hot-reload:object'));
-  assert.deepEqual(ankiPatches, [{ enabled: config.ankiConnect.ai.enabled }]);
+  assert.deepEqual(ankiPatches, [{ ai: config.ankiConnect.ai.enabled }]);
   assert.equal(sessionBindingWarnings.length, 1);
   assert.ok(
     sessionBindingWarnings[0]?.some((message) =>
@@ -57,6 +57,87 @@ test('createConfigHotReloadAppliedHandler runs all hot-reload effects', () => {
   );
 });
 
+test('createConfigHotReloadAppliedHandler applies safe Anki, annotation, and logging changes', () => {
+  const config = deepCloneConfig(DEFAULT_CONFIG);
+  config.ankiConnect.behavior.autoUpdateNewCards = false;
+  config.ankiConnect.knownWords.highlightEnabled = true;
+  config.ankiConnect.knownWords.refreshMinutes = 90;
+  config.ankiConnect.knownWords.decks = { Anime: ['Mining'] };
+  config.ankiConnect.nPlusOne.enabled = true;
+  config.ankiConnect.nPlusOne.minSentenceWords = 4;
+  config.ankiConnect.fields.word = 'Expression';
+  config.ankiConnect.fields.audio = 'SentenceAudioCustom';
+  config.ankiConnect.fields.image = 'ScreenshotCustom';
+  config.ankiConnect.fields.sentence = 'SentenceCustom';
+  config.ankiConnect.fields.miscInfo = 'MiscInfoCustom';
+  config.ankiConnect.isLapis.sentenceCardModel = 'Sentence Card Custom';
+  config.ankiConnect.isKiku.fieldGrouping = 'manual';
+  config.logging.level = 'debug';
+  const calls: string[] = [];
+  const ankiPatches: unknown[] = [];
+
+  const applyHotReload = createConfigHotReloadAppliedHandler({
+    setKeybindings: () => calls.push('set:keybindings'),
+    setSessionBindings: () => calls.push('set:session-bindings'),
+    refreshGlobalAndOverlayShortcuts: () => calls.push('refresh:shortcuts'),
+    setSecondarySubMode: () => calls.push('set:secondary'),
+    broadcastToOverlayWindows: (channel) => calls.push(`broadcast:${channel}`),
+    applyAnkiRuntimeConfigPatch: (patch) => {
+      calls.push('anki:patch');
+      ankiPatches.push(patch);
+    },
+    invalidateTokenizationCache: () => calls.push('invalidate:tokens'),
+    refreshSubtitlePrefetch: () => calls.push('refresh:prefetch'),
+    refreshCurrentSubtitle: () => calls.push('refresh:subtitle'),
+    setLogLevel: (level) => calls.push(`log:${level}`),
+  });
+
+  applyHotReload(
+    {
+      hotReloadFields: [
+        'ankiConnect.behavior.autoUpdateNewCards',
+        'ankiConnect.knownWords.highlightEnabled',
+        'ankiConnect.knownWords.refreshMinutes',
+        'ankiConnect.knownWords.decks',
+        'ankiConnect.nPlusOne.enabled',
+        'ankiConnect.nPlusOne.minSentenceWords',
+        'ankiConnect.fields.word',
+        'ankiConnect.fields.audio',
+        'ankiConnect.fields.image',
+        'ankiConnect.fields.sentence',
+        'ankiConnect.fields.miscInfo',
+        'ankiConnect.isLapis.sentenceCardModel',
+        'ankiConnect.isKiku.fieldGrouping',
+        'logging.level',
+      ],
+      restartRequiredFields: [],
+    },
+    config,
+  );
+
+  assert.deepEqual(ankiPatches, [
+    {
+      behavior: { autoUpdateNewCards: false },
+      knownWords: config.ankiConnect.knownWords,
+      nPlusOne: config.ankiConnect.nPlusOne,
+      fields: {
+        word: 'Expression',
+        audio: 'SentenceAudioCustom',
+        image: 'ScreenshotCustom',
+        sentence: 'SentenceCustom',
+        miscInfo: 'MiscInfoCustom',
+      },
+      isLapis: { sentenceCardModel: 'Sentence Card Custom' },
+      isKiku: { fieldGrouping: 'manual' },
+    },
+  ]);
+  assert.ok(calls.includes('invalidate:tokens'));
+  assert.ok(calls.includes('refresh:prefetch'));
+  assert.ok(calls.includes('refresh:subtitle'));
+  assert.ok(calls.includes('log:debug'));
+  assert.ok(calls.includes('broadcast:config:hot-reload'));
+});
+
 test('buildConfigHotReloadPayload includes independent primary subtitle mode', () => {
   const config = deepCloneConfig(DEFAULT_CONFIG);
   config.subtitleStyle.primaryDefaultMode = 'hover';

src/main/runtime/config-hot-reload-handlers.ts

@@ -3,6 +3,7 @@ import { compileSessionBindings } from '../../core/services/session-bindings';
 import { resolveKeybindings } from '../../core/utils/keybindings';
 import { resolveConfiguredShortcuts } from '../../core/utils/shortcut-config';
 import { DEFAULT_CONFIG, DEFAULT_KEYBINDINGS } from '../../config';
+import type { AnkiConnectConfig } from '../../types/anki';
 import type { ConfigHotReloadPayload, ResolvedConfig, SecondarySubMode } from '../../types';
 
 type ConfigHotReloadAppliedDeps = {
@@ -14,9 +15,11 @@ type ConfigHotReloadAppliedDeps = {
   refreshGlobalAndOverlayShortcuts: () => void;
   setSecondarySubMode: (mode: SecondarySubMode) => void;
   broadcastToOverlayWindows: (channel: string, payload: unknown) => void;
-  applyAnkiRuntimeConfigPatch: (patch: {
-    ai: ResolvedConfig['ankiConnect']['ai']['enabled'];
-  }) => void;
+  applyAnkiRuntimeConfigPatch: (patch: Partial<AnkiConnectConfig>) => void;
+  invalidateTokenizationCache?: () => void;
+  refreshSubtitlePrefetch?: () => void;
+  refreshCurrentSubtitle?: () => void;
+  setLogLevel?: (level: ResolvedConfig['logging']['level']) => void;
 };
 
 type ConfigHotReloadMessageDeps = {
@@ -59,6 +62,70 @@ export function buildConfigHotReloadPayload(config: ResolvedConfig): ConfigHotRe
   };
 }
 
+function hasAnyHotReloadField(diff: ConfigHotReloadDiff, prefixes: string[]): boolean {
+  return diff.hotReloadFields.some((field) =>
+    prefixes.some((prefix) => field === prefix || field.startsWith(`${prefix}.`)),
+  );
+}
+
+function buildAnkiRuntimeConfigPatch(
+  diff: ConfigHotReloadDiff,
+  config: ResolvedConfig,
+): Partial<AnkiConnectConfig> | null {
+  const patch: Partial<AnkiConnectConfig> = {};
+
+  if (diff.hotReloadFields.includes('ankiConnect.ai')) {
+    patch.ai = config.ankiConnect.ai.enabled;
+  }
+  if (diff.hotReloadFields.includes('ankiConnect.ai.enabled')) {
+    patch.ai = config.ankiConnect.ai.enabled;
+  }
+  if (diff.hotReloadFields.includes('ankiConnect.behavior.autoUpdateNewCards')) {
+    patch.behavior = { autoUpdateNewCards: config.ankiConnect.behavior.autoUpdateNewCards };
+  }
+  if (hasAnyHotReloadField(diff, ['ankiConnect.knownWords'])) {
+    patch.knownWords = config.ankiConnect.knownWords;
+  }
+  if (hasAnyHotReloadField(diff, ['ankiConnect.nPlusOne'])) {
+    patch.nPlusOne = config.ankiConnect.nPlusOne;
+  }
+  const fieldPatch: NonNullable<AnkiConnectConfig['fields']> = {};
+  if (diff.hotReloadFields.includes('ankiConnect.fields.word')) {
+    fieldPatch.word = config.ankiConnect.fields.word;
+  }
+  if (diff.hotReloadFields.includes('ankiConnect.fields.audio')) {
+    fieldPatch.audio = config.ankiConnect.fields.audio;
+  }
+  if (diff.hotReloadFields.includes('ankiConnect.fields.image')) {
+    fieldPatch.image = config.ankiConnect.fields.image;
+  }
+  if (diff.hotReloadFields.includes('ankiConnect.fields.sentence')) {
+    fieldPatch.sentence = config.ankiConnect.fields.sentence;
+  }
+  if (diff.hotReloadFields.includes('ankiConnect.fields.miscInfo')) {
+    fieldPatch.miscInfo = config.ankiConnect.fields.miscInfo;
+  }
+  if (Object.keys(fieldPatch).length > 0) {
+    patch.fields = fieldPatch;
+  }
+  if (diff.hotReloadFields.includes('ankiConnect.isLapis.sentenceCardModel')) {
+    patch.isLapis = { sentenceCardModel: config.ankiConnect.isLapis.sentenceCardModel };
+  }
+  if (diff.hotReloadFields.includes('ankiConnect.isKiku.fieldGrouping')) {
+    patch.isKiku = { fieldGrouping: config.ankiConnect.isKiku.fieldGrouping };
+  }
+
+  return Object.keys(patch).length > 0 ? patch : null;
+}
+
+function hasAnnotationRuntimeHotReload(diff: ConfigHotReloadDiff): boolean {
+  return hasAnyHotReloadField(diff, [
+    'ankiConnect.knownWords',
+    'ankiConnect.nPlusOne',
+    'ankiConnect.fields.word',
+  ]);
+}
+
 export function createConfigHotReloadAppliedHandler(deps: ConfigHotReloadAppliedDeps) {
   return (diff: ConfigHotReloadDiff, config: ResolvedConfig): void => {
     const payload = buildConfigHotReloadPayload(config);
@@ -74,8 +141,19 @@ export function createConfigHotReloadAppliedHandler(deps: ConfigHotReloadApplied
       deps.broadcastToOverlayWindows('secondary-subtitle:mode', payload.secondarySubMode);
     }
 
-    if (diff.hotReloadFields.includes('ankiConnect.ai')) {
-      deps.applyAnkiRuntimeConfigPatch({ ai: config.ankiConnect.ai.enabled });
+    const ankiPatch = buildAnkiRuntimeConfigPatch(diff, config);
+    if (ankiPatch) {
+      deps.applyAnkiRuntimeConfigPatch(ankiPatch);
+    }
+
+    if (hasAnnotationRuntimeHotReload(diff)) {
+      deps.invalidateTokenizationCache?.();
+      deps.refreshSubtitlePrefetch?.();
+      deps.refreshCurrentSubtitle?.();
+    }
+
+    if (diff.hotReloadFields.includes('logging.level')) {
+      deps.setLogLevel?.(config.logging.level);
     }
 
     if (diff.hotReloadFields.length > 0) {

src/main/runtime/config-hot-reload-main-deps.ts

@@ -3,6 +3,7 @@ import type {
   ConfigHotReloadRuntimeDeps,
 } from '../../core/services/config-hot-reload';
 import type { ReloadConfigStrictResult } from '../../config';
+import type { AnkiConnectConfig } from '../../types/anki';
 import type {
   ConfigHotReloadPayload,
   ConfigValidationWarning,
@@ -69,9 +70,11 @@ export function createBuildConfigHotReloadAppliedMainDepsHandler(deps: {
   refreshGlobalAndOverlayShortcuts: () => void;
   setSecondarySubMode: (mode: SecondarySubMode) => void;
   broadcastToOverlayWindows: (channel: string, payload: unknown) => void;
-  applyAnkiRuntimeConfigPatch: (patch: {
-    ai: ResolvedConfig['ankiConnect']['ai']['enabled'];
-  }) => void;
+  applyAnkiRuntimeConfigPatch: (patch: Partial<AnkiConnectConfig>) => void;
+  invalidateTokenizationCache?: () => void;
+  refreshSubtitlePrefetch?: () => void;
+  refreshCurrentSubtitle?: () => void;
+  setLogLevel?: (level: ResolvedConfig['logging']['level']) => void;
 }) {
   return () => ({
     setKeybindings: (keybindings: ConfigHotReloadPayload['keybindings']) =>
@@ -84,8 +87,12 @@ export function createBuildConfigHotReloadAppliedMainDepsHandler(deps: {
     setSecondarySubMode: (mode: SecondarySubMode) => deps.setSecondarySubMode(mode),
     broadcastToOverlayWindows: (channel: string, payload: unknown) =>
       deps.broadcastToOverlayWindows(channel, payload),
-    applyAnkiRuntimeConfigPatch: (patch: { ai: ResolvedConfig['ankiConnect']['ai']['enabled'] }) =>
+    applyAnkiRuntimeConfigPatch: (patch: Partial<AnkiConnectConfig>) =>
       deps.applyAnkiRuntimeConfigPatch(patch),
+    invalidateTokenizationCache: () => deps.invalidateTokenizationCache?.(),
+    refreshSubtitlePrefetch: () => deps.refreshSubtitlePrefetch?.(),
+    refreshCurrentSubtitle: () => deps.refreshCurrentSubtitle?.(),
+    setLogLevel: (level: ResolvedConfig['logging']['level']) => deps.setLogLevel?.(level),
   });
 }