Full-featured web UI

Rewrites the page around a persistent player (speed, seek, resume,
MediaSession, keyboard shortcuts), artwork, filter tabs, episode search,
pagination and live progress, with modals and toasts replacing prompt()
and a status line.

Backend gains the metadata that makes that possible: feed and episode
artwork, durations, season/episode numbers and playback position, plus
filters, search, totals, mark-all-read, download-latest and OPML over
HTTP. Schema changes arrive through a real migration, since CREATE TABLE
IF NOT EXISTS does nothing to an installed database.

Fixes filtering, which returned 500 whenever no search term was given:
the search clause was dropped while its parameter was still bound.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RPyeapneuXrCdojsaiXGbe

src/feed.rs

@@ -10,6 +10,7 @@ use crate::config::Feed as FeedCfg;
 pub struct ParsedFeed {
     pub title: Option<String>,
     pub ttl_mins: Option<u64>,
+    pub image: Option<String>,
     pub entries: Vec<Entry>,
 }
 
@@ -22,6 +23,12 @@ pub struct Entry {
     pub description: Option<String>,
     pub categories: Vec<String>,
     pub explicit: bool,
+    /// Episode artwork; falls back to the feed's in the UI.
+    pub image: Option<String>,
+    /// Seconds.
+    pub duration: Option<i64>,
+    pub episode: Option<i64>,
+    pub season: Option<i64>,
     pub enclosures: Vec<Enclosure>,
 }
 
@@ -123,6 +130,7 @@ fn from_rss(ch: rss::Channel) -> ParsedFeed {
                 .itunes_ext()
                 .and_then(|it| it.explicit())
                 .is_some_and(is_yes);
+            let it = item.itunes_ext();
 
             Some(Entry {
                 guid,
@@ -138,6 +146,10 @@ fn from_rss(ch: rss::Channel) -> ParsedFeed {
                     .filter(|c| !c.is_empty() && !c.starts_with("http"))
                     .collect(),
                 explicit: explicit || entry_explicit,
+                image: it.and_then(|i| i.image()).map(str::to_owned),
+                duration: it.and_then(|i| i.duration()).and_then(parse_duration),
+                episode: it.and_then(|i| i.episode()).and_then(|e| e.trim().parse().ok()),
+                season: it.and_then(|i| i.season()).and_then(|e| e.trim().parse().ok()),
                 enclosures,
             })
         })
@@ -146,6 +158,12 @@ fn from_rss(ch: rss::Channel) -> ParsedFeed {
     ParsedFeed {
         title: non_empty(Some(ch.title())),
         ttl_mins: ch.ttl().and_then(|t| t.trim().parse().ok()),
+        // itunes:image is the square artwork; <image><url> is the older, often smaller one.
+        image: ch
+            .itunes_ext()
+            .and_then(|i| i.image())
+            .map(str::to_owned)
+            .or_else(|| ch.image().map(|i| i.url().to_owned())),
         entries,
     }
 }
@@ -193,6 +211,10 @@ fn from_atom(feed: atom_syndication::Feed) -> ParsedFeed {
                     .map(str::to_owned),
                 categories: e.categories().iter().map(|c| c.term().to_owned()).collect(),
                 explicit: false,
+                image: None,
+                duration: None,
+                episode: None,
+                season: None,
                 enclosures,
             })
         })
@@ -201,6 +223,7 @@ fn from_atom(feed: atom_syndication::Feed) -> ParsedFeed {
     ParsedFeed {
         title: non_empty(Some(feed.title().as_str())),
         ttl_mins: None,
+        image: feed.logo().or_else(|| feed.icon()).map(str::to_owned),
         entries,
     }
 }
@@ -230,6 +253,22 @@ fn non_empty(s: Option<&str>) -> Option<String> {
     s.map(str::trim).filter(|s| !s.is_empty()).map(str::to_owned)
 }
 
+/// itunes:duration is either plain seconds ("5649") or a clock ("1:34:09", "23:45").
+fn parse_duration(s: &str) -> Option<i64> {
+    let s = s.trim();
+    if s.is_empty() {
+        return None;
+    }
+    if !s.contains(':') {
+        return s.parse().ok().filter(|n| *n > 0);
+    }
+    let mut total: i64 = 0;
+    for part in s.split(':') {
+        total = total * 60 + part.trim().parse::<i64>().ok()?;
+    }
+    Some(total).filter(|n| *n > 0)
+}
+
 /// RSS pubDate is RFC 2822; some feeds ship RFC 3339 instead.
 fn parse_date(s: &str) -> Option<i64> {
     let s = s.trim();
@@ -312,6 +351,16 @@ mod tests {
         );
     }
 
+    #[test]
+    fn durations_parse_from_seconds_or_a_clock() {
+        assert_eq!(parse_duration("5649"), Some(5649));
+        assert_eq!(parse_duration("23:45"), Some(1425));
+        assert_eq!(parse_duration("1:34:09"), Some(5649));
+        assert_eq!(parse_duration("0"), None, "zero is not a duration");
+        assert_eq!(parse_duration(""), None);
+        assert_eq!(parse_duration("garbage"), None);
+    }
+
     #[test]
     fn rejects_html_masquerading_as_a_feed() {
         assert!(parse(b"<html><body>nope</body></html>").is_err());