Fix JLPT underline color drift and AniList skipped-threshold sync

- Replace JLPT `text-decoration` underlines with `border-bottom` so Chromium selection/hover cannot repaint them to another annotation's color
- Lock JLPT underline color for combined annotation selectors (known, n+1, frequency) and character hover/selection states
- Trigger AniList post-watch check on every mpv time-position update to catch skipped completion thresholds
- Fall back to filename-parser season/episode when guessit omits them

src/main/runtime/mpv-main-event-actions.test.ts

@@ -199,6 +199,10 @@ test('time-pos and pause handlers report progress with correct urgency', () => {
     recordPlaybackPosition: (time) => calls.push(`time:${time}`),
     reportJellyfinRemoteProgress: (force) => calls.push(`progress:${force ? 'force' : 'normal'}`),
     refreshDiscordPresence: () => calls.push('presence'),
+    maybeRunAnilistPostWatchUpdate: async () => {
+      calls.push('post-watch');
+    },
+    logError: () => calls.push('post-watch-error'),
   });
   const pauseHandler = createHandleMpvPauseChangeHandler({
     recordPauseState: (paused) => calls.push(`pause:${paused ? 'yes' : 'no'}`),
@@ -212,6 +216,7 @@ test('time-pos and pause handlers report progress with correct urgency', () => {
     'time:12.5',
     'progress:normal',
     'presence',
+    'post-watch',
     'pause:yes',
     'progress:force',
     'presence',

src/main/runtime/mpv-main-event-actions.ts

@@ -105,12 +105,17 @@ export function createHandleMpvTimePosChangeHandler(deps: {
   recordPlaybackPosition: (time: number) => void;
   reportJellyfinRemoteProgress: (forceImmediate: boolean) => void;
   refreshDiscordPresence: () => void;
+  maybeRunAnilistPostWatchUpdate?: () => Promise<void>;
+  logError?: (message: string, error: unknown) => void;
   onTimePosUpdate?: (time: number) => void;
 }) {
   return ({ time }: { time: number }): void => {
     deps.recordPlaybackPosition(time);
     deps.reportJellyfinRemoteProgress(false);
     deps.refreshDiscordPresence();
+    void deps.maybeRunAnilistPostWatchUpdate?.().catch((error) => {
+      deps.logError?.('AniList post-watch update failed unexpectedly', error);
+    });
     deps.onTimePosUpdate?.(time);
   };
 }

src/main/runtime/mpv-main-event-bindings.ts

@@ -149,6 +149,8 @@ export function createBindMpvMainEventHandlersHandler(deps: {
       reportJellyfinRemoteProgress: (forceImmediate) =>
         deps.reportJellyfinRemoteProgress(forceImmediate),
       refreshDiscordPresence: () => deps.refreshDiscordPresence(),
+      maybeRunAnilistPostWatchUpdate: () => deps.maybeRunAnilistPostWatchUpdate(),
+      logError: (message, error) => deps.logSubtitleTimingError(message, error),
       onTimePosUpdate: (time) => deps.onTimePosUpdate?.(time),
     });
     const handleMpvPauseChange = createHandleMpvPauseChangeHandler({