Keep every enclosure on an item, and view without downloading

The rss crate keeps at most one enclosure per item and, when a feed ships
several, silently keeps the last -- so a two-file item lost its first
file. enclosures_by_item reads them from the XML in document order,
unescaping attributes so a URL's & survives. The row summarises the
one you would act on and counts the rest; the pane below lists them all.

Non-media enclosures gain a View link opening in a new tab: the
publisher's URL, or the local copy once downloaded. A direct link, not a
proxy, so the daemon does not become a fetch-anything relay.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AdXho5tTkjFLeUXKbEjKBh

Cargo.toml

@@ -16,6 +16,7 @@ infer = "0.22.0"
 librqbit = { version = "9.0.1", default-features = false, features = ["rust-tls", "http-api-client"] }
 opml = "1.1.6"
 percent-encoding = "2.3.2"
+quick-xml = "0.42.0"
 reqwest = { version = "0.13.5", default-features = false, features = ["rustls", "http2", "gzip", "stream", "json", "charset", "system-proxy"] }
 rss = "2.1.1"
 rusqlite = { version = "0.40.2", features = ["bundled"] }