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, 8 insertions, 8 deletions

diff --git a/docs/mediacenter.md b/docs/mediacenter.md
index 3f70112..5c27939 100644
--- a/docs/mediacenter.md
+++ b/docs/mediacenter.md
@@ -759,16 +759,16 @@ movie "Fix match" applied to the one file, not the whole `display_title` group;
 shields manual corrections); the movie detail modal shows the source filename + resolved
 TMDB id, and an unmatched poster gets a badge.
 
-**Still open, noted so they are not lost (all found while fixing the above):**
+**V8–V13 — the follow-ups, now done** (branch `feat/videos-matching-v8-v13`):
 
-| # | Item | Severity |
+| # | Item | Done |
 |---|---|---|
-| V8 | The **TV/show branch** of `_tmdb_search` still returns the first candidate over 0.6 — the same shape just fixed for movies. §5.7's own wrong show-level match was this class; its parade was Fix match + season tabs, not the search. Give it the scored ladder too | medium |
-| V9 | `_best_match` still trusts `results[0]` per query unconditionally. The movie fix works around it by trying more queries; if no competing query beats a wrong-but-high-ratio `results[0]`, it still wins. The originally-planned year-aware `_best_match` (mediacenter "C") would harden this — deferred: apply the year signal only when the #1 hit is already low-confidence | medium |
-| V10 | `sequel_variants` is narrow: one trailing digit 2–9, arabic→roman only. No "Part One", "Chapitre 2", "10", roman→arabic | low |
-| V11 | Extra TMDB calls in the 0.6–0.85 band: a film that used to match in one request now makes 2–4 before settling (then cached). Bounded, but real | low |
-| V12 | Movies are not merged in the poster grid — a film present in 1080p + 720p shows as two cards (the `tmdb_id` merge in §V6 is show-only) | cosmetic |
-| V13 | A per-card "re-match this one file" button in the SPA — `ops.rematch_video` is group-wide and CLI/loopback only; a per-card control needs a new signed op or MNP message. Fix match already covers targeted correction | low |
+| ~~V8~~ | The TV/show branch of `_tmdb_search` used the old "first over 0.6 wins" shape | Both branches share one `_tmdb_ladder` — score every candidate, keep the best, fast-path a confident primary hit. `title_parse.year_in` lifts a year off a show folder name; `title_parse.clean_query` de-dots a folder-derived title without `naive_title`'s extension-strip |
+| ~~V9~~ | `_best_match` trusted `results[0]` per query unconditionally | Optional `year`: when the top result is not a confident textual hit (< 0.6) and a year was requested, a different result of that exact release year is preferred. A confident top hit is never overridden |
+| ~~V10~~ | `sequel_variants` narrow (trailing digit 2–9, arabic→roman only) | Widened: digit↔Roman both ways, spelled-out indices (one/two…, un/deux…, ordinals), a "Part N" / "Chapitre N" wrapper. Still empty for a trailing word that is not an index or a 4-digit year |
+| ~~V11~~ | Extra TMDB calls in the 0.6–0.85 band | When the primary hit is decent (≥ 0.6) and there is nothing more specific to try (no `alternative_title`, no sequel variant), the ladder returns without the extra requests |
+| ~~V12~~ | Movies not merged in the poster grid | `mergedMovies` groups by resolved `tmdb_id`, mirroring `mergedShows`; the detail modal lists the versions (resolution · duration · size), each a Play button. New `video.versions` key ×10. Edge: "Fix match" on a merged movie corrects only the representative file; the other version un-merges and can be corrected on its own |
+| ~~V13~~ | Per-card "re-match this one file" button | `OP_TMDB_REMATCH` / `MNP.TMDB_REMATCH` (MNP 0.13, additive) → `media_cache.drop_tmdb_match` (forgets the match *and* the override marker). Signed like `tmdb_override`. Button next to "Fix match" in the detail modal; `transport.rematchTmdbMatch`; `video.rematch_one` key ×10 |
 
 ## 11. Acceptance before shipping