Store embed titles and search them

CURRENT.md

@@ -40,6 +40,14 @@ mobile draft at 390px.
   - [x] C11 preview caching: Discord-hosted image/GIF previews (WebP 320px, hash-addressed, 5 MiB
     cap, one attempt) run after every walk in both modes. Live run `...-20260916090722`:
     `previewed: 2`; thumbs served over `/api/media/<scrape>/<item>/thumb` (200).
+  - [x] C49 Searchable video titles. Embed rows now store Discord's `title` plus a normalized
+    `title_key` (lowercase, punctuation collapsed). The Advanced drawer has a title field with an
+    **Exact match (quotes)** toggle: default is order-free multi-word prefix search ("Ma Ca Ju"
+    finds *Man who jumps over car*), exact mode is one phrase; rows without a title drop out while
+    the query is set. Store, `/api/media`, `/api/media/stats`, and MCP carry `title`/`titleExact`;
+    the API result and card tooltip expose the title. Unit tests cover prefixes, mid-word misses,
+    exact phrases, and punctuation folding; smoke checks the field and toggle. Note: titles only
+    exist for rows scraped from now on — pre-existing rows need the backfill queued in TODO.md.
   - [x] C48 Expanded providers and the Must include mirror. The list grew to 19 entries from the
     user's picks: reddit, twitter, tiktok, instagram, streamable, facebook, gyazo, a merged
     `giphy,tenor` (one checkbox, two substrings), 2ch.hk (stand-in for 4chan; the CDN hosts stay