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BrowsePage accepts pasted or routed channel/playlist URLs: - Channels get Videos / Shorts / Live sub-tabs mapped to the channel's /videos, /shorts and /streams listings, lazily fetched 24 at a time with -I range pagination; channel title and id resolve from a cheap -I 1:1 metadata fetch. Subscribe emits subscribeRequested for the Feed page to wire up. - Playlists get a single grid with Play all (bulk-enqueues into the Watch queue) and a Download button that deep-links the playlist into the Downloads tab. Workers are parented to their pages and fetch errors surface as status text instead of crashing (verified against a channel with no videos tab). fetch_flat_info gains an items="1:1" limiter so metadata probes no longer enumerate whole channels. Verified live: kurzgesagt channel (24 cards, title+id resolved) and a 17-video playlist with Play-all queueing. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>