Make adding RSS sources painless. Instead of requiring the exact feed URL, a user can paste any page — a blog homepage, a YouTube channel, a subreddit, a Mastodon profile — and the server resolves the concrete feed it advertises. Plus OPML bulk-import to migrate a reader export or a YouTube subscriptions list in one shot. No new SourceKind, no migration; this enriches the existing worker-polled RSS rail. New crate `newsfeed-fetch` — the one place that does outbound feed HTTP: - probe(url): normalise (+ Reddit /.rss rewrite) -> fetch -> if it parses as a feed, done; else scan the HTML <head> for <link rel=alternate type=rss/atom>, resolve the relative href, and validate. Covers YouTube/Mastodon/Substack/ WordPress/blogs, which all advertise their feed this way. - parse_opml(): recurses nested outline folders. - fetch_entries()/entry mapping moved here from the worker so both the API (discovery) and worker (polling) share a single HTTP+feed-rs path. - core: add the FeedProbe port (kept I/O-free; adapter lives in newsfeed-fetch). - api: AppState carries Arc<dyn FeedProbe>; POST /v1/sources resolves a pasted homepage to its feed; add POST /v1/sources/discover (preview) and /v1/sources/import (OPML, deduped by URL, per-feed failures collected). - worker: delegate to newsfeed_fetch::fetch_entries; drop the sourcing/ module. - web: Sources page gains paste-URL + "Find feed" preview, OPML file import with a summary, and a "polled Nm ago" hint per source; new client methods and regenerated ts-rs bindings. Verified end-to-end locally: homepage URL -> discovered feed.xml + title; create stores the resolved URL; OPML import added 1/skipped 1 dup; worker polled and both items landed in the feed. fmt/clippy/test + web build/lint green. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016fKZzDpvjiJ9eYbPGgJvUP
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