feat: V13 — per-card "re-match this one file" (MNP 0.13)

A one-click alternative to the full "Fix match" search-and-pick flow, and
reachable without SSH (`meshbay-node video rematch` clears a whole group).

- MNP 0.13: tmdb_rematch / tmdb_rematch_ack (additive — an older node
  logs "unknown type", the button just does nothing). OP_TMDB_REMATCH,
  signed like tmdb_override (media_cache is shared node-wide).
- media_cache.drop_tmdb_match(file_id): forgets the match AND the
  override marker — deliberately stronger than clear_file_tmdb, since the
  operator is explicitly asking for a fresh resolution.
- webrtc_server: _do_tmdb_rematch / _admin_exec_tmdb_rematch, dispatch +
  admin-response routing, broadcasts tmdb_rematch_ack.
- transport.js: rematchTmdbMatch(fileId, signFn); 'tmdb_rematch' in the
  admin-op allowlist; tmdb_rematch_ack handled like tmdb_override_ack.
- video-app.js: a "Re-match" button beside "Fix match" in the detail
  modal (isNodeAdmin), then bumpMediaMetaGeneration(). video.rematch_one
  key in all ten locales.

docs/mediacenter.md §10.1: V8–V13 marked done.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018BMLQjqFGCize2KtNBT79v

1 files changed, 22 insertions, 3 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/video-app.js b/packages/meshbay-hub/src/meshbay_hub/static/video-app.js
index 48709f9..6d13e27 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/video-app.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/video-app.js
@@ -482,8 +482,22 @@ function VideoDetailModal({
 }) {
   const confident = Boolean(meta && meta.confidence && meta.tmdb_id);
   const [searching, setSearching] = useState(false);
+  const [rematching, setRematching] = useState(false);
   const mediaType = show ? 'tv' : 'movie';
 
+  // §10.1/V13: drop this file's cached match on the node and let it
+  // re-resolve with the current matcher — the one-click alternative to the
+  // full search-and-pick flow above.
+  const doRematch = useCallback(async () => {
+    if (rematching) return;
+    setRematching(true);
+    try {
+      await transportRef.current.rematchTmdbMatch(repEntry.id, buildSignFn(transportRef));
+      bumpMediaMetaGeneration();
+    } catch { /* leave the current match in place */ }
+    setRematching(false);
+  }, [rematching, repEntry, transportRef]);
+
   // Reset whenever a different file/show is opened in this same modal
   // instance — repEntry/show change identity, selectedSeason must not
   // silently keep pointing at whatever the previous show's season 4 was.
@@ -535,9 +549,14 @@ function VideoDetailModal({
             `}
           `}
           ${isNodeAdmin && html`
-            <button class="admin-btn video-fix-match" onClick=${() => setSearching(true)}>
-              ${t('video.fix_match')}
-            </button>
+            <div class="video-admin-actions">
+              <button class="admin-btn video-fix-match" onClick=${() => setSearching(true)}>
+                ${t('video.fix_match')}
+              </button>
+              <button class="admin-btn" onClick=${doRematch} disabled=${rematching}>
+                ${rematching ? html`<span class="spinner"></span>` : t('video.rematch_one')}
+              </button>
+            </div>
           `}
           ${showMultiSeason && html`
             <${SeasonTabs} seasons=${show.seasons} selected=${selectedSeason}