v1.6.3

Added

• RSS / Atom / RDF feed rendering — XML feeds (RSS 2.0, RSS 1.0/RDF, Atom 1.0) are now detected by Content-Type (with body sniff fallback for mislabeled servers) and converted to clean, token-optimized markdown instead of the previous run-on-text result. Each item renders as ## [title](link) followed by a date · category meta line and the description; the channel/feed title becomes the H1.
• New src/core/feed_to_md.rs module with 12 unit tests covering all three feed formats, namespace prefixes (dc:, rdf:), CDATA-wrapped HTML descriptions, Atom rel="alternate" link routing, and graceful partial-parse on malformed XML.
• New dependency: quick-xml = "0.37".

Changed

• Feed dispatch runs before the meta-refresh redirect loop — XML feeds skip the wasted scan since they never carry HTML meta-refresh.
• estimate_tokens, truncate_markdown, and collapse_inline_whitespace in html_to_md are now pub(crate) so the feed module can reuse them.

Fixed

• core::config::tests::test_load_full_config no longer hardcodes a stale user-agent version that broke on every release bump — the test now exercises the default-user-agent path it was always meant to cover.