7.3: capturedAt/source au registre + 6 adaptateurs + module provenance.ts + ?debug=1 (search-transport.mjs). 7.4: ProviderHealthService + badge source degradee. 7.6: squelettes par provider + snapshots progressifs + transport NDJSON /api/search. 8.1: ProviderAdapter unifie (search enveloppe + channelContent/channelMeta/capabilities) via getProviderAdapter + test de contrat offline.
- InnerTube layer via pinned youtubei.js 18.1.0 (no quota, no key): search with merged continuations (unlimited pages), watch-next related with LockupView mapping, caption-track discovery - 3-layer dispatcher (YT_SEARCH_MODE, default innertube-first): innertube -> yt-dlp scrape -> official API, graceful errors.yt - Robust yt-dlp binary resolution (YT_DLP_PATH > PATH > bundled) with systematic API fallback (fixes spawn ENOENT in UI) - Transcript: InnerTube caption discovery (YT_TRANSCRIPT_SOURCE), reusing pickTrack/orderedTracks/parseTrackText; yt-dlp fallback kept - Watch: sidebar uses real watch-next related[] (/api/details), title-search fallback for other providers - Cache: memory LRU + SQLite (youtube_search_cache, youtube_metrics), never persist empty pages; /healthz observability; /api/trending - Includes pending Step 15/16 leftovers in same files (suggest, test scripts); unrelated provider adapters left uncommitted