fix: delegate multi-line digit selection to visible overlay (#78)

src/main/runtime/app-lifecycle-main-cleanup.test.ts

@@ -69,6 +69,7 @@ test('cleanup deps builder returns handlers that guard optional runtime objects'
     clearYomitanSettingsWindow: () => calls.push('clear-yomitan-settings-window'),
 
     stopJellyfinRemoteSession: () => calls.push('stop-jellyfin-remote'),
+    cleanupYoutubeSubtitleTempDirs: () => calls.push('cleanup-youtube-subtitles'),
     stopDiscordPresenceService: () => calls.push('stop-discord-presence'),
   });
 
@@ -89,6 +90,7 @@ test('cleanup deps builder returns handlers that guard optional runtime objects'
   assert.ok(calls.includes('destroy-first-run-window'));
   assert.ok(calls.includes('destroy-yomitan-settings-window'));
   assert.ok(calls.includes('stop-jellyfin-remote'));
+  assert.ok(calls.includes('cleanup-youtube-subtitles'));
   assert.ok(calls.includes('stop-discord-presence'));
   assert.ok(calls.includes('clear-windows-visible-overlay-foreground-poll-loop'));
   assert.ok(calls.includes('clear-linux-mpv-fullscreen-overlay-refresh-timeouts'));
@@ -142,6 +144,7 @@ test('cleanup deps builder skips destroyed yomitan window', () => {
     getYomitanSettingsWindow: () => null,
     clearYomitanSettingsWindow: () => {},
     stopJellyfinRemoteSession: () => {},
+    cleanupYoutubeSubtitleTempDirs: () => {},
     stopDiscordPresenceService: () => {},
   });
 
@@ -190,6 +193,7 @@ test('cleanup deps builder skips global shortcut cleanup before app ready', () =
     getYomitanSettingsWindow: () => null,
     clearYomitanSettingsWindow: () => {},
     stopJellyfinRemoteSession: () => {},
+    cleanupYoutubeSubtitleTempDirs: () => {},
     stopDiscordPresenceService: () => {},
   });