feat: update subtitle sidebar overlay behavior

src/renderer/index.html

@@ -85,6 +85,36 @@
           </div>
         </div>
       </div>
+      <div id="youtubePickerModal" class="modal hidden" aria-hidden="true">
+        <div class="modal-content youtube-picker-content">
+          <div class="modal-header">
+            <div class="modal-title">YouTube Subtitle Tracks</div>
+            <button id="youtubePickerCloseButton" class="modal-close" type="button">
+              Continue without subtitles
+            </button>
+          </div>
+          <div class="modal-body youtube-picker-body">
+            <div id="youtubePickerTitle" class="youtube-picker-title"></div>
+            <div class="youtube-picker-grid">
+              <label class="youtube-picker-field">
+                <span>Primary subtitle</span>
+                <select id="youtubePickerPrimarySelect"></select>
+              </label>
+              <label class="youtube-picker-field">
+                <span>Secondary subtitle</span>
+                <select id="youtubePickerSecondarySelect"></select>
+              </label>
+            </div>
+            <div id="youtubePickerStatus" class="youtube-picker-status"></div>
+            <ul id="youtubePickerTracks" class="youtube-picker-tracks"></ul>
+            <div class="youtube-picker-footer">
+              <button id="youtubePickerContinueButton" class="kiku-confirm-button" type="button">
+                Use selected subtitles
+              </button>
+            </div>
+          </div>
+        </div>
+      </div>
       <div id="kikuFieldGroupingModal" class="modal hidden" aria-hidden="true">
         <div class="modal-content">
           <div class="modal-header">

src/renderer/modals/subtitle-sidebar.test.ts

@@ -84,6 +84,18 @@ test('findActiveSubtitleCueIndex prefers timing match before text fallback', ()
   assert.equal(findActiveSubtitleCueIndex(cues, { text: 'same', startTime: null }), 0);
 });
 
+test('findActiveSubtitleCueIndex prefers current subtitle timing over near-future clock lookahead', () => {
+  const cues = [
+    { startTime: 231, endTime: 233.2, text: 'previous' },
+    { startTime: 233.05, endTime: 236, text: 'next' },
+  ];
+
+  assert.equal(
+    findActiveSubtitleCueIndex(cues, { text: 'previous', startTime: 231 }, 233, 0),
+    0,
+  );
+});
+
 test('subtitle sidebar modal opens from snapshot and clicking cue seeks playback', async () => {
   const globals = globalThis as typeof globalThis & { window?: unknown; document?: unknown };
   const previousWindow = globals.window;

src/renderer/modals/subtitle-sidebar.ts

@@ -61,6 +61,18 @@ export function findActiveSubtitleCueIndex(
     return -1;
   }
 
+  const hasCurrentTiming =
+    typeof current?.startTime === 'number' && Number.isFinite(current.startTime);
+
+  if (hasCurrentTiming) {
+    const timingMatch = cues.findIndex(
+      (cue) => current.startTime! >= cue.startTime && current.startTime! < cue.endTime,
+    );
+    if (timingMatch >= 0) {
+      return timingMatch;
+    }
+  }
+
   if (typeof currentTimeSec === 'number' && Number.isFinite(currentTimeSec)) {
     const activeOrUpcomingCue = cues.findIndex(
       (cue) =>
@@ -81,15 +93,6 @@ export function findActiveSubtitleCueIndex(
     return -1;
   }
 
-  if (typeof current.startTime === 'number' && Number.isFinite(current.startTime)) {
-    const timingMatch = cues.findIndex(
-      (cue) => current.startTime! >= cue.startTime && current.startTime! < cue.endTime,
-    );
-    if (timingMatch >= 0) {
-      return timingMatch;
-    }
-  }
-
   const normalizedText = normalizeCueText(current.text);
   if (!normalizedText) {
     return -1;

src/renderer/state.ts

@@ -13,6 +13,7 @@ import type {
   SubtitleSidebarConfig,
   SubtitleCue,
   SubsyncSourceTrack,
+  YoutubePickerOpenPayload,
 } from '../types';
 
 export type KikuModalStep = 'select' | 'preview';
@@ -40,6 +41,12 @@ export type RendererState = {
   currentEpisodeFilter: number | null;
   currentEntryId: number | null;
 
+  youtubePickerModalOpen: boolean;
+  youtubePickerPayload: YoutubePickerOpenPayload | null;
+  youtubePickerPrimaryTrackId: string | null;
+  youtubePickerSecondaryTrackId: string | null;
+  youtubePickerStatus: string;
+
   kikuModalOpen: boolean;
   kikuSelectedCard: 1 | 2;
   kikuOriginalData: KikuDuplicateCardInfo | null;
@@ -131,6 +138,12 @@ export function createRendererState(): RendererState {
     currentEpisodeFilter: null,
     currentEntryId: null,
 
+    youtubePickerModalOpen: false,
+    youtubePickerPayload: null,
+    youtubePickerPrimaryTrackId: null,
+    youtubePickerSecondaryTrackId: null,
+    youtubePickerStatus: '',
+
     kikuModalOpen: false,
     kikuSelectedCard: 1,
     kikuOriginalData: null,

src/renderer/style.css

@@ -127,6 +127,10 @@ body {
   z-index: 1100;
 }
 
+#youtubePickerModal {
+  z-index: 1110;
+}
+
 .modal.hidden {
   display: none;
 }
@@ -138,11 +142,11 @@ body {
 .modal-content {
   width: min(720px, 92%);
   max-height: 80%;
-  background: rgba(20, 20, 20, 0.95);
+  background: rgba(36, 39, 58, 0.95);
-  border: 1px solid rgba(255, 255, 255, 0.12);
+  border: 1px solid rgba(110, 115, 141, 0.18);
   border-radius: 12px;
   padding: 16px;
-  color: #fff;
+  color: #cad3f5;
   display: flex;
   flex-direction: column;
   gap: 12px;
@@ -161,16 +165,17 @@ body {
 }
 
 .modal-close {
-  background: rgba(255, 255, 255, 0.1);
+  background: rgba(73, 77, 100, 0.5);
-  color: #fff;
+  color: #a5adcb;
-  border: 1px solid rgba(255, 255, 255, 0.2);
+  border: 1px solid rgba(110, 115, 141, 0.2);
   border-radius: 6px;
   padding: 6px 10px;
   cursor: pointer;
 }
 
 .modal-close:hover {
-  background: rgba(255, 255, 255, 0.2);
+  background: rgba(91, 96, 120, 0.6);
+  color: #cad3f5;
 }
 
 .modal-body {
@@ -288,6 +293,91 @@ body {
   display: none;
 }
 
+.youtube-picker-content {
+  width: min(820px, 92%);
+  background:
+    radial-gradient(circle at top right, rgba(198, 160, 246, 0.10), transparent 34%),
+    linear-gradient(180deg, rgba(36, 39, 58, 0.98), rgba(30, 32, 48, 0.98));
+  border-color: rgba(138, 173, 244, 0.25);
+}
+
+.youtube-picker-body {
+  gap: 14px;
+}
+
+.youtube-picker-title {
+  font-size: 13px;
+  color: #b8c0e0;
+}
+
+.youtube-picker-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 12px;
+}
+
+.youtube-picker-field {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  font-size: 12px;
+  color: #a5adcb;
+}
+
+.youtube-picker-field select {
+  min-height: 36px;
+  border-radius: 8px;
+  border: 1px solid rgba(110, 115, 141, 0.28);
+  background: rgba(24, 25, 38, 0.92);
+  color: #cad3f5;
+  padding: 6px 10px;
+}
+
+.youtube-picker-status {
+  min-height: 20px;
+  font-size: 13px;
+  color: #a5adcb;
+}
+
+.youtube-picker-tracks {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  max-height: 220px;
+  overflow-y: auto;
+  border-radius: 10px;
+  border: 1px solid rgba(110, 115, 141, 0.18);
+}
+
+.youtube-picker-tracks li {
+  display: flex;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 10px 12px;
+  border-bottom: 1px solid rgba(110, 115, 141, 0.08);
+  color: #cad3f5;
+}
+
+.youtube-picker-tracks li:last-child {
+  border-bottom: none;
+}
+
+.youtube-picker-track-meta {
+  color: #6e738d;
+  font-size: 12px;
+}
+
+.youtube-picker-footer {
+  display: flex;
+  justify-content: flex-end;
+}
+
+@media (max-width: 700px) {
+  .youtube-picker-grid {
+    grid-template-columns: 1fr;
+  }
+}
+
 @media (max-width: 640px) {
   .jimaku-form {
     grid-template-columns: 1fr 1fr;
@@ -982,15 +1072,15 @@ iframe[id^='yomitan-popup'] {
 .kiku-confirm-button {
   padding: 8px 20px;
   border-radius: 6px;
-  border: 1px solid rgba(100, 180, 255, 0.4);
+  border: 1px solid rgba(138, 173, 244, 0.4);
-  background: rgba(100, 180, 255, 0.15);
+  background: rgba(138, 173, 244, 0.15);
-  color: rgba(100, 180, 255, 0.95);
+  color: #8aadf4;
   font-weight: 600;
   cursor: pointer;
 }
 
 .kiku-confirm-button:hover {
-  background: rgba(100, 180, 255, 0.25);
+  background: rgba(138, 173, 244, 0.25);
 }
 
 .subsync-modal-content {
@@ -1288,9 +1378,9 @@ iframe[id^='yomitan-popup'] {
 .btn-learn {
   padding: 5px 14px;
   border-radius: 5px;
-  border: 1px solid rgba(100, 180, 255, 0.4);
+  border: 1px solid rgba(138, 173, 244, 0.4);
-  background: rgba(100, 180, 255, 0.15);
+  background: rgba(138, 173, 244, 0.15);
-  color: rgba(100, 180, 255, 0.95);
+  color: #8aadf4;
   font-size: 12px;
   font-weight: 600;
   cursor: pointer;
@@ -1298,28 +1388,28 @@ iframe[id^='yomitan-popup'] {
 }
 
 .btn-learn:hover {
-  background: rgba(100, 180, 255, 0.25);
+  background: rgba(138, 173, 244, 0.25);
 }
 
 .btn-learn.active {
-  border-color: rgba(100, 180, 255, 0.7);
+  border-color: rgba(138, 173, 244, 0.7);
-  background: rgba(100, 180, 255, 0.25);
+  background: rgba(138, 173, 244, 0.25);
 }
 
 .btn-secondary {
   padding: 5px 12px;
   border-radius: 5px;
-  border: 1px solid rgba(255, 255, 255, 0.12);
+  border: 1px solid rgba(110, 115, 141, 0.2);
   background: transparent;
-  color: rgba(255, 255, 255, 0.55);
+  color: #6e738d;
   font-size: 12px;
   cursor: pointer;
   transition: background 120ms ease, color 120ms ease;
 }
 
 .btn-secondary:hover {
-  background: rgba(255, 255, 255, 0.08);
+  background: rgba(73, 77, 100, 0.4);
-  color: rgba(255, 255, 255, 0.85);
+  color: #a5adcb;
 }
 
 .controller-debug-content {

src/renderer/utils/dom.ts

@@ -20,6 +20,15 @@ export type RendererDom = {
   jimakuFilesList: HTMLUListElement;
   jimakuBroadenButton: HTMLButtonElement;
 
+  youtubePickerModal: HTMLDivElement;
+  youtubePickerTitle: HTMLDivElement;
+  youtubePickerPrimarySelect: HTMLSelectElement;
+  youtubePickerSecondarySelect: HTMLSelectElement;
+  youtubePickerContinueButton: HTMLButtonElement;
+  youtubePickerCloseButton: HTMLButtonElement;
+  youtubePickerStatus: HTMLDivElement;
+  youtubePickerTracks: HTMLUListElement;
+
   kikuModal: HTMLDivElement;
   kikuCard1: HTMLDivElement;
   kikuCard2: HTMLDivElement;
@@ -120,6 +129,19 @@ export function resolveRendererDom(): RendererDom {
     jimakuFilesList: getRequiredElement<HTMLUListElement>('jimakuFiles'),
     jimakuBroadenButton: getRequiredElement<HTMLButtonElement>('jimakuBroaden'),
 
+    youtubePickerModal: getRequiredElement<HTMLDivElement>('youtubePickerModal'),
+    youtubePickerTitle: getRequiredElement<HTMLDivElement>('youtubePickerTitle'),
+    youtubePickerPrimarySelect: getRequiredElement<HTMLSelectElement>('youtubePickerPrimarySelect'),
+    youtubePickerSecondarySelect: getRequiredElement<HTMLSelectElement>(
+      'youtubePickerSecondarySelect',
+    ),
+    youtubePickerContinueButton: getRequiredElement<HTMLButtonElement>(
+      'youtubePickerContinueButton',
+    ),
+    youtubePickerCloseButton: getRequiredElement<HTMLButtonElement>('youtubePickerCloseButton'),
+    youtubePickerStatus: getRequiredElement<HTMLDivElement>('youtubePickerStatus'),
+    youtubePickerTracks: getRequiredElement<HTMLUListElement>('youtubePickerTracks'),
+
     kikuModal: getRequiredElement<HTMLDivElement>('kikuFieldGroupingModal'),
     kikuCard1: getRequiredElement<HTMLDivElement>('kikuCard1'),
     kikuCard2: getRequiredElement<HTMLDivElement>('kikuCard2'),