feat(qt): Open containing album on cortinilla track rows

CortRow gains an albumId — the Qobuz album id for catalog tracks, the
album group key for local ones (both are what crate::open_album routes),
empty elsewhere. The track menu gates its new entry on the field, the
action funnels through cortinillaMenuAction like its siblings, and the
new msgid ships in the seven non-English locales.

cc

crates/qbz-qt/qml/shell/Cortinilla.qml

@@ -102,13 +102,20 @@ Item {
                 artistRows.push({ "label": t("Play", r), "icon": "play-fill", "action": "play" })
             return artistRows
         }
-        if (row.kind === "track") return [
-            { "label": t("Play", r), "icon": "play-fill", "action": "play" },
-            { "label": t("Play next", r), "icon": "list-start", "action": "next" },
-            { "label": t("Play later", r), "icon": "list-plus", "action": "later" },
-            { "label": t("Add to queue", r), "icon": "list-end", "action": "queue" },
-            { "label": t("Add to playlist", r), "icon": "list-music", "action": "add-to-playlist" }
-        ]
+        if (row.kind === "track") {
+            var trackRows = [
+                { "label": t("Play", r), "icon": "play-fill", "action": "play" },
+                { "label": t("Play next", r), "icon": "list-start", "action": "next" },
+                { "label": t("Play later", r), "icon": "list-plus", "action": "later" },
+                { "label": t("Add to queue", r), "icon": "list-end", "action": "queue" },
+                { "label": t("Add to playlist", r), "icon": "list-music", "action": "add-to-playlist" }
+            ]
+            // QoL round: gated on the payload actually carrying the album
+            // (a Qobuz id or a local group key — search_qt::CortRow.albumId).
+            if ((row.albumId || "") !== "")
+                trackRows.push({ "label": t("Open containing album", r), "icon": "disc-3", "action": "open-album" })
+            return trackRows
+        }
         if (row.kind === "playlist") return [
             { "label": t("Open playlist", r), "icon": "list-music", "action": "open" },
             { "label": t("Play", r), "icon": "play-fill", "action": "play" },
@@ -124,8 +131,8 @@ Item {
         if (fi === undefined || fi === null)
             return
         QbzSearch.cortinillaMenuAction(fi, action)
-        if ((action === "open" || action === "play" || action === "add-to-playlist")
-                && root.headerBar)
+        if ((action === "open" || action === "open-album" || action === "play"
+                || action === "add-to-playlist") && root.headerBar)
             root.headerBar.clearSearch()
     }