Add per-kind stats, GIF hover playback, and static gif previews

docs/webui.md

@@ -265,7 +265,7 @@ replaceable.
 | GET | `/api/media/scrapes` | none | Every scrape with state and counters |
 | GET | `/api/media/status` | none | Slopbot connection state and the scrape list |
 | GET | `/api/media/authors` | none | Distinct posters across every scrape, with counts |
-| GET | `/api/media/stats` | same filters as `/api/media` | Counts: `total`, `downloaded`, `cached`, `notDownloaded` |
+| GET | `/api/media/stats` | same filters as `/api/media` | Counts per kind (`image`, `gif`, `video`, `audio`), each with `total`, `downloaded`, `cached`, `notDownloaded` |
 | GET | `/api/media/storage` | none | Usage against the limit, per-kind sizes, `nearLimit`; marks old scrapes when over |
 | POST | `/api/media/scrape` | `channelId`, `guildId?`, `mode?`, `backend?`, `confirm?`, `downloadDir?`, `after?`, `before?` | Start a media scrape. `backend` is `auto` (default), `slopbot`, or `puppet`; `downloadDir` is an absolute path for downloaded files (previews stay local); `after`/`before` are ISO dates bounding the walk. Near the limit: `409` with code `MEDIA_LIMIT` unless `confirm: true` |
 | POST | `/api/media/count` | `channelId`, `guildId?`, `after?`, `before?` | Discord search total for the channel or range. Returns `{ count }` or `{ count: null, reason }` (slopbot guild channels only) |