fix(subtitles): preserve lyric selection and deduplicate secondary text

- Seek sidebar selections past overlapping karaoke exit spans
- Collapse duplicate long ASS lines and omit reconstructed sign grids

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

@@ -240,14 +240,15 @@ test('subtitle sidebar modal opens from snapshot and clicking cue seeks playback
 
   const snapshot: SubtitleSidebarSnapshot = {
     cues: [
-      { startTime: 1, endTime: 2, text: 'first' },
+      { startTime: 1, endTime: 3.4, text: 'first' },
       { startTime: 3, endTime: 4, text: 'second' },
     ],
     currentSubtitle: {
       text: 'second',
-      startTime: 3,
+      startTime: 3.5,
       endTime: 4,
     },
+    currentTimeSec: 3.5,
     config: {
       enabled: true,
       autoOpen: false,
@@ -361,6 +362,9 @@ test('subtitle sidebar modal opens from snapshot and clicking cue seeks playback
     modal.seekToCue(snapshot.cues[0]!);
     assert.deepEqual(mpvCommands.at(-1), ['seek', 1.08, 'absolute+exact']);
 
+    modal.seekToCue(snapshot.cues[1]!);
+    assert.deepEqual(mpvCommands.at(-1), ['seek', 3.48, 'absolute+exact']);
+
     modal.closeSubtitleSidebarModal();
     assert.deepEqual(visibilityChanges, [true, false]);
     assert.deepEqual(modalNotifications, ['open:subtitle-sidebar', 'close:subtitle-sidebar']);

src/renderer/modals/subtitle-sidebar.ts

@@ -4,7 +4,7 @@ import type {
   SubtitleMiningContext,
   SubtitleSidebarSnapshot,
 } from '../../types';
-import { subtitleCueSeekTime } from '../../core/services/subtitle-cue-navigation.js';
+import { subtitleCueListSeekTime } from '../../core/services/subtitle-cue-navigation.js';
 import type { ModalStateReader, RendererContext } from '../context';
 import { syncOverlayMouseIgnoreState } from '../overlay-mouse-ignore.js';
 import {
@@ -392,7 +392,11 @@ export function createSubtitleSidebarModal(
   }
 
   function seekToCue(cue: SubtitleCue): void {
-    window.electronAPI.sendMpvCommand(['seek', subtitleCueSeekTime(cue), 'absolute+exact']);
+    window.electronAPI.sendMpvCommand([
+      'seek',
+      subtitleCueListSeekTime(ctx.state.subtitleSidebarCues, cue),
+      'absolute+exact',
+    ]);
   }
 
   function getCueRowLabel(cue: SubtitleCue): string {

src/renderer/subtitle-render.test.ts

@@ -1454,6 +1454,15 @@ test('prepareSecondarySubtitleLines preserves repeated short dialogue without la
   assert.deepEqual(prepareSecondarySubtitleLines(dialogue.join('\\N')), dialogue);
 });
 
+test('prepareSecondarySubtitleLines collapses punctuation variants of a full-sentence fallback', () => {
+  const dialogue = 'A question veiled as an insult!';
+  const positionedSign = 'A question veiled as an insult';
+
+  assert.deepEqual(prepareSecondarySubtitleLines([dialogue, positionedSign].join('\\N')), [
+    dialogue,
+  ]);
+});
+
 test('prepareSecondarySubtitleLines preserves short simultaneous dialogue without repeats', () => {
   const dialogue = ['Wait', 'Go!', 'No!', 'Run!'];
 

src/renderer/subtitle-render.ts

@@ -6,6 +6,7 @@ import type {
   SubtitleRendererStyleConfig,
 } from '../types';
 import { assToPlainText, normalizePlainSubtitleText } from '../core/services/ass-text.js';
+import { flattenedSecondarySubtitleLineIdentity } from '../core/services/secondary-subtitle-line-identity.js';
 import type { RendererContext } from './context';
 import { PRIMARY_SUB_VISIBLE_ON_YOMITAN_POPUP_CLASS } from './yomitan-popup.js';
 
@@ -665,6 +666,17 @@ function isKaraokeLikeLineSet(lines: string[]): boolean {
   return median <= KARAOKE_MAX_MEDIAN_LINE_LENGTH;
 }
 
+function collapseFullLineFallbackCopies(lines: string[]): string[] {
+  const seen = new Set<string>();
+  return lines.filter((line) => {
+    const identity = flattenedSecondarySubtitleLineIdentity(line);
+    if (!identity) return true;
+    if (seen.has(identity)) return false;
+    seen.add(identity);
+    return true;
+  });
+}
+
 export function prepareSecondarySubtitleLines(text: string): string[] {
   // The one display-side ASS decode: secondary text also reaches the overlay from
   // websocket clients that forward their source line untouched, so unlike the primary
@@ -678,7 +690,7 @@ export function prepareSecondarySubtitleLines(text: string): string[] {
     .map((line) => line.trim())
     .filter((line) => line.length > 0);
   if (!isKaraokeLikeLineSet(lines)) {
-    return lines;
+    return collapseFullLineFallbackCopies(lines);
   }
 
   const seen = new Set<string>();