feat(slint): playlist detail track menus 1:1 (remove, source routing, bulk parity)

Per-row Remove from playlist lands (danger styling, owner-gated by design
- Tauri renders it un-gated and lets the API reject; we port the intent,
commented) working across qobuz/local/plex rows through the namespace
split. Per-row Play next / Add to queue route by source: local rows
enqueue their snapshot QueueTrack instead of mis-parsing row ids as
catalog ids, and plex rows enqueue too (deliberate deviation from Tauri's
silent no-op - the machinery exists). Hero Play next/later of mixed
playlists merge the sidecar before enqueueing (Tauri T2 fix-forward: their
hero arms drop source and crash plex auto-advance). Bulk bar reaches
parity: select mode on followed playlists, source-aware bulk Play next /
Add to queue / Add to playlist (mixed selections send Qobuz rows to the
catalog picker, all-sidecar selections to the local picker), Remove stays
owner-only. The offline-cache action is now cache-state aware app-wide
(Make available / Refresh / Remove with a sequenced recache arm), and
Track info hides on this surface until the feature exists.

cc

crates/qbz-slint/ui/primitives/TrackContextMenu.slint

@@ -17,21 +17,37 @@ export component TrackContextMenu inherits PopupWindow {
     // §3.1/§3.2); they default to the block so Qobuz surfaces are unchanged.
     // `playlist-action` = Add to playlist — on for Qobuz + offline + local +
     // Plex (local playlists store each source's own ref), off for ephemeral.
+    // `remove-from-playlist-action` = the playlist-detail per-row removal
+    // (every row source — the arm splits by id namespace); the surface
+    // gates it on ownership (spec §3.1).
+    // `track-info-action` lets a surface HIDE the Track Info entry while
+    // its target feature is missing there (spec §3.3) — defaults on so
+    // other surfaces are untouched.
     // The transient actions (play / next / queue) always show.
     in property <bool> qobuz-actions: true;
     in property <bool> favorite-action: root.qobuz-actions;
     in property <bool> mixtape-action: root.qobuz-actions;
     in property <bool> playlist-action: true;
+    in property <bool> remove-from-playlist-action: false;
+    in property <bool> track-info-action: true;
+    // The row's offline-cache status (TrackItem.cache-status): when cached
+    // (3) the single "Make available offline" entry swaps for the
+    // Refresh / Remove pair — Tauri's ready-state submenu, rendered flat
+    // (cosmetic-flat per spec §3.5).
+    in property <int> cache-status: 0;
     callback media-action(string, string, string);
 
     width: 224px;
-    // 3 transient + optional favorite/mixtape/add-to-playlist + the
-    // 7-item Qobuz block.
+    // 3 transient + optional favorite/mixtape/add-to-playlist/remove + the
+    // Qobuz block (5 fixed + 1-or-2 offline entries + optional track info).
     height: (3
         + (root.favorite-action ? 1 : 0)
         + (root.mixtape-action ? 1 : 0)
         + (root.playlist-action ? 1 : 0)
-        + (root.qobuz-actions ? 7 : 0)) * 30px;
+        + (root.remove-from-playlist-action ? 1 : 0)
+        + (root.qobuz-actions
+            ? 5 + (root.cache-status == 3 ? 2 : 1) + (root.track-info-action ? 1 : 0)
+            : 0)) * 30px;
 
     ContextMenu {
         ContextMenuItem {
@@ -83,6 +99,16 @@ export component TrackContextMenu inherits PopupWindow {
                 root.media-action("track", root.track-id, "add-to-playlist");
             }
         }
+        // Remove from playlist (danger) — playlist detail only, after Add
+        // to playlist (Tauri group order, spec §1.3 #8).
+        if root.remove-from-playlist-action: ContextMenuItem {
+            icon: @image-url("../assets/icons/trash-2.svg");
+            label: @tr("Remove from playlist");
+            danger: true;
+            clicked => {
+                root.media-action("track", root.track-id, "remove-from-playlist");
+            }
+        }
         if root.qobuz-actions: ContextMenuItem {
             icon: @image-url("../assets/icons/link.svg");
             label: @tr("Share Qobuz link");
@@ -97,13 +123,32 @@ export component TrackContextMenu inherits PopupWindow {
                 root.media-action("track", root.track-id, "share-songlink");
             }
         }
-        if root.qobuz-actions: ContextMenuItem {
+        // Offline-cache block — cached-state-aware (Tauri's ready-state
+        // submenu, flat per spec §3.5): not cached -> Make available
+        // offline; cached -> Refresh + Remove (icons 1:1 with Tauri's
+        // RefreshCw / Trash2).
+        if root.qobuz-actions && root.cache-status != 3: ContextMenuItem {
             icon: @image-url("../assets/icons/cloud-download.svg");
             label: @tr("Make available offline");
             clicked => {
                 root.media-action("track", root.track-id, "download");
             }
         }
+        if root.qobuz-actions && root.cache-status == 3: ContextMenuItem {
+            icon: @image-url("../assets/icons/refresh-cw.svg");
+            label: @tr("Refresh offline copy");
+            clicked => {
+                root.media-action("track", root.track-id, "recache");
+            }
+        }
+        if root.qobuz-actions && root.cache-status == 3: ContextMenuItem {
+            icon: @image-url("../assets/icons/trash-2.svg");
+            label: @tr("Remove offline copy");
+            danger: true;
+            clicked => {
+                root.media-action("track", root.track-id, "uncache");
+            }
+        }
         if root.qobuz-actions: ContextMenuItem {
             icon: @image-url("../assets/icons/disc-3.svg");
             label: @tr("Go to album");
@@ -118,7 +163,7 @@ export component TrackContextMenu inherits PopupWindow {
                 root.media-action("track", root.track-id, "go-to-artist");
             }
         }
-        if root.qobuz-actions: ContextMenuItem {
+        if root.qobuz-actions && root.track-info-action: ContextMenuItem {
             icon: @image-url("../assets/icons/info.svg");
             label: @tr("Track info");
             clicked => {