fix(locallibrary): track-row source indicator (drop fav/offline) + AlbumView favorite item

LocalLibrary track rows (Tracks tab + local album detail) no longer carry the
favorite or offline-cache columns — they don't apply to local content. Instead
they show a subtle per-source indicator (local -> hard-drive tinted; qobuz
offline / plex -> their mark), small + flat rather than the bold album-card
badge (mirrors Tauri's track-row local indicator). TrackItem gains a `source`
field, set by every constructor (Qobuz surfaces -> "qobuz"; map_local_track ->
local/qobuz/plex); TrackRow gains `show-source`.

Also fixes Qobuz AlbumView: the track list had a Favorite column header but the
rows never rendered the heart (show-favorite defaulted false). AlbumPageView
now sets show-favorite + show-download for Qobuz albums (matching the header)
and the source indicator for local albums, with the column header switched to
match each.

cc

crates/qbz-slint/src/album.rs

@@ -259,6 +259,8 @@ pub fn apply_album(window: &AppWindow, data: AlbumData) {
             removing: false,
             cache_status: if crate::offline_cache::is_cached(&track.id) { 3 } else { 0 },
             cache_progress: 0.0,
+            // Qobuz album-detail rows; local albums override via map_local_track.
+            source: "qobuz".into(),
             unlocking: false,
         })
         .collect();

crates/qbz-slint/src/artist.rs

@@ -505,6 +505,7 @@ pub fn apply_artist(window: &AppWindow, data: ArtistData) {
             removing: false,
             cache_status: if crate::offline_cache::is_cached(&track.id) { 3 } else { 0 },
             cache_progress: 0.0,
+            source: "qobuz".into(),
             unlocking: false,
         })
         .collect();

crates/qbz-slint/src/favorites.rs

@@ -421,6 +421,7 @@ pub fn apply_favorites(window: &AppWindow, data: FavData) {
                     removing: false,
                     cache_status: if crate::offline_cache::is_cached(&t.id) { 3 } else { 0 },
                     cache_progress: 0.0,
+                    source: "qobuz".into(),
                     unlocking: false,
                 })
                 .collect();

crates/qbz-slint/src/label.rs

@@ -765,6 +765,7 @@ fn top_track_to_item(t: &TopTrack) -> TrackItem {
         removing: false,
         cache_status: if crate::offline_cache::is_cached(&t.id) { 3 } else { 0 },
         cache_progress: 0.0,
+        source: "qobuz".into(),
         unlocking: false,
     }
 }

crates/qbz-slint/src/local_library.rs

@@ -454,6 +454,13 @@ fn map_local_track(t: qbz_library::LocalTrack) -> TrackItem {
         removing: false,
         cache_status: 0,
         cache_progress: 0.0,
+        // Source indicator: offline copies read as Qobuz, user files as local.
+        source: match t.source.as_deref() {
+            Some("qobuz_download") => "qobuz",
+            Some("plex") => "plex",
+            _ => "local",
+        }
+        .into(),
         unlocking: false,
     }
 }

crates/qbz-slint/src/mix.rs

@@ -177,6 +177,7 @@ fn to_item(track: &Track) -> TrackItem {
         removing: false,
         cache_status: if crate::offline_cache::is_cached(&track.id.to_string()) { 3 } else { 0 },
         cache_progress: 0.0,
+        source: "qobuz".into(),
         unlocking: false,
     }
 }

crates/qbz-slint/src/playlist.rs

@@ -384,6 +384,7 @@ fn to_item(track: &Track) -> TrackItem {
         removing: false,
         cache_status: if crate::offline_cache::is_cached(&track.id.to_string()) { 3 } else { 0 },
         cache_progress: 0.0,
+        source: "qobuz".into(),
         unlocking: false,
     }
 }

crates/qbz-slint/src/search.rs

@@ -375,6 +375,7 @@ fn track_item(row: TrackRowData) -> TrackItem {
         removing: false,
         cache_status: if is_cached { 3 } else { 0 },
         cache_progress: 0.0,
+        source: "qobuz".into(),
         unlocking: false,
     }
 }