feat(plugins): add episode-tags and auto-jimaku example plugins

- episode-tags: tag mined cards with show/episode parsed from the file name or stream title
- auto-jimaku: open Jimaku search when a file starts without a Japanese subtitle track
- Hold card-mined for notes merged into a note still waiting on queued YouTube media
- Route YouTube media settle reports through reportCardsReady
- Document both plugins in docs-site and changelog fragment

assets/plugins/auto-jimaku/main.js

@@ -0,0 +1,52 @@
+// Opens the Jimaku subtitle search when a file starts without a Japanese subtitle track.
+// It waits a few seconds after the file loads so external subtitles mpv or SubMiner add count.
+
+const DEFAULT_SETTINGS = {
+  // Built-in action to run, e.g. `openTsukihime` or `openSubtitleSelection`.
+  action: 'openJimaku',
+  // Track `lang` codes that count as Japanese. Track titles with "Japanese" or 日本語 count too.
+  languages: ['ja', 'jp', 'jpn'],
+  delayMs: 3_000,
+  // Also check http(s) streams; Jimaku can only search by name, which streams rarely have.
+  streams: false,
+};
+
+const JAPANESE_TITLE = /japanese|日本語/i;
+
+function activate(ctx) {
+  const settings = { ...DEFAULT_SETTINGS, ...ctx.settings };
+  const languages = new Set(settings.languages.map((lang) => lang.toLowerCase()));
+  let cancelCheck = null;
+
+  function hasJapaneseSubtitle(trackList) {
+    return trackList.some(
+      (track) =>
+        track?.type === 'sub' &&
+        (languages.has(String(track.lang ?? '').toLowerCase()) ||
+          JAPANESE_TITLE.test(String(track.title ?? ''))),
+    );
+  }
+
+  async function check(mediaPath) {
+    cancelCheck = null;
+    const [currentPath, trackList] = await Promise.all([
+      ctx.mpv.getProperty('path'),
+      ctx.mpv.getProperty('track-list'),
+    ]);
+    // Another file started while we waited; its own check is already scheduled.
+    if (currentPath !== mediaPath || !Array.isArray(trackList)) return;
+    if (hasJapaneseSubtitle(trackList)) return;
+    ctx.log.info(`No Japanese subtitles for ${mediaPath}; running ${settings.action}.`);
+    await ctx.actions.run(settings.action);
+  }
+
+  ctx.mpv.on('media-path-change', ({ path: mediaPath }) => {
+    cancelCheck?.();
+    cancelCheck = null;
+    if (!mediaPath) return;
+    if (!settings.streams && /^[a-z]+:\/\//i.test(mediaPath)) return;
+    cancelCheck = ctx.after(settings.delayMs, () => check(mediaPath));
+  });
+}
+
+module.exports = { activate };

assets/plugins/auto-jimaku/plugin.json

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+{
+  "name": "Auto Jimaku",
+  "version": "1.0.0",
+  "main": "main.js"
+}