fix: stabilize playback memory, local library sync and Qt settings

Add shared playback memory profiles, bounded disk-backed playback and storage
selection for desktop and daemon. Preserve gapless during streaming-only playback
and provide explicit cache eviction with playback confirmation.

Stop watcher read events and unchanged scans from rebuilding the local catalog.
Restore playlist/sidebar updates, folder availability feedback and player layout.
Add appearance presets and a radio-based cache settings panel with translated
trade-offs, plus consistent clipboard menus across visible Qt text editors.

Validate with Rust regressions, QML interaction tests, isolated release startup
and idle-library checks; extend the shared local and CI gates.

cx

crates/qbz-qt/qml/views/AlbumListRow.qml

@@ -66,7 +66,8 @@ Rectangle {
     readonly property bool pulled: root.item.qobuzUnavailable === true
     readonly property int cacheStatus: root.item.cacheStatus !== undefined
         ? root.item.cacheStatus : 0
-    readonly property bool pulledDead: root.pulled && root.cacheStatus !== 3
+    readonly property bool pulledDead: (root.pulled && root.cacheStatus !== 3)
+        || root.item.sourceUnavailable === true
     /// `modifiers` rides straight off the mouse event: Shift is what turns
     /// a click into a range (controls/SelectionModel.qml).
     signal toggleSelect(int modifiers)
@@ -123,7 +124,7 @@ Rectangle {
     /// below all resolve a catalog id.
     readonly property bool catalogRow: {
         var src = root.item.source || ""
-        return src !== "local" && src !== "plex"
+        return src === "" || src === "qobuz"
     }
 
     function menuEntries() {

crates/qbz-qt/qml/views/AlbumView.qml

@@ -1484,6 +1484,7 @@ Rectangle {
                                     tintName: "muted"
                                 }
                                 TextInput {
+                                    QbzTextEditMenu { }
                                     width: parent.width - 21
                                     height: parent.height
                                     color: theme.textPrimary

crates/qbz-qt/qml/views/LibraryView.qml

@@ -148,10 +148,12 @@ Rectangle {
             it._albumLc = String(it.album || "").toLowerCase()
             it._genreLc = String(it.genre || "").toLowerCase()
             if (it.kind === "track" || it.kind === "album") {
-                if (it.group === "favorites" || it.group === "purchases") {
-                    var tabKey = it.kind + ":" + it.id
+                if (it.group === "favorites" || it.group === "purchases"
+                    || (it.kind === "album" && isLocalFeedItem(it))) {
+                    var tabKey = membershipKey
                     if (it.group === "purchases") tabPurchased[tabKey] = true
-                    else tabFavorites[tabKey] = true
+                    else if (it.group === "favorites" || it.isFavorite === true)
+                        tabFavorites[tabKey] = true
                     if (!tabSeen[tabKey]) {
                         tabSeen[tabKey] = true
                         totals[it.kind + "s"]++
@@ -674,13 +676,15 @@ Rectangle {
             var x = feed[i]
             var keep = false
             if (sourceTab && x.kind === sourceKind) {
-                var sourceKey = sourceKind + ":" + x.id
+                var sourceKey = x._membershipKey
                 var isPurchased = purchased[sourceKey] === true
                 var isFavorite = favorites[sourceKey] === true
                 var included = matchesSources(isPurchased, isFavorite, false)
+                var localRelease = sourceKind === "album" && isLocalFeedItem(x)
+                if (localRelease && !showLocal && hideableLocalAlbum(x)) included = false
                 // One representative row per included entity. A purchase row
                 // wins even in Favorites-only so its quality badge survives.
-                keep = included && ((isPurchased && x.group === "purchases")
+                keep = included && (localRelease || (isPurchased && x.group === "purchases")
                     || (!isPurchased && x.group === "favorites"))
                 if (keep) {
                     if (tabSeen[sourceKey]) keep = false

crates/qbz-qt/qml/views/LocalAlbumView.qml

@@ -556,6 +556,7 @@ Rectangle {
                                 height: parent.height
                                 clip: true
                                 TextInput {
+                                    QbzTextEditMenu { }
                                     id: searchInput
                                     anchors.fill: parent
                                     color: theme.textPrimary

crates/qbz-qt/qml/views/PlayHistoryView.qml

@@ -122,6 +122,7 @@ Rectangle {
                         height: parent.height
                         clip: true
                         TextInput {
+                            QbzTextEditMenu { }
                             id: mpSearch
                             anchors.fill: parent
                             color: theme.textPrimary

crates/qbz-qt/qml/views/PlaylistView.qml

@@ -737,6 +737,7 @@ Rectangle {
                             spacing: 6
                             QbzIcon { name: "search"; width: 13; height: 13; anchors.verticalCenter: parent.verticalCenter; tintName: "muted" }
                             TextInput {
+                                QbzTextEditMenu { }
                                 width: parent.width - 19
                                 height: parent.height
                                 color: theme.textPrimary

crates/qbz-qt/qml/views/QueueView.qml

@@ -692,6 +692,7 @@ Rectangle {
                                     border.color: customMinutes.activeFocus
                                         ? theme.accent : theme.borderSubtle
                                     TextInput {
+                                        QbzTextEditMenu { }
                                         id: customMinutes
                                         anchors.fill: parent
                                         anchors.leftMargin: 9

crates/qbz-qt/qml/views/library/FeedGridCell.qml

@@ -114,6 +114,19 @@ Item {
             // may additionally show the catalog mark in the mixed feed.
             source: cell.item.source
             sources: cell.item.sources || []
+            catalogAffordances: !cell.view.isLocalFeedItem(cell.item)
+            localMode: cell.view.isLocalFeedItem(cell.item)
+            localPlaylistAffordance: localMode
+            hostFavorite: localMode && badgeSources.some(function (source) {
+                return ["local", "plex", "jellyfin", "subsonic", "navidrome",
+                    "gonic", "airsonic", "astiga"].indexOf(source) >= 0
+            })
+            onFavoriteRequested: QbzLocal.albumToggleFavorite(cell.item.id,
+                cell.item.title || "", cell.item.artist || "", artworkUrl,
+                JSON.stringify(badgeSources))
+            onOpenRequested: QbzAlbum.openAlbum(cell.item.id)
+            onPlayRequested: QbzPlayer.playAlbum(cell.item.id)
+            onEnqueueRequested: function (mode) { QbzPlayer.enqueueAlbum(cell.item.id, mode) }
             showSourceBadge: cell.view.showSourceBadges
         }
     }

crates/qbz-qt/qml/views/myqbz/DiscoBuilderView.qml

@@ -259,6 +259,7 @@ Rectangle {
                     border.color: nameField.activeFocus
                         ? theme.accent : theme.surfaceElevated
                     TextInput {
+                        QbzTextEditMenu { }
                         id: nameField
                         anchors.fill: parent
                         anchors.leftMargin: 12

crates/qbz-qt/qml/views/scene/SceneGenreFilter.qml

@@ -53,6 +53,7 @@
 // consumer.
 
 import QtQuick
+import "../../controls"
 import com.blitzfc.qbz
 import "../../theme"
 
@@ -267,6 +268,7 @@ Item {
                     tintName: "muted"
                 }
                 TextInput {
+                    QbzTextEditMenu { }
                     id: searchInput
                     width: parent.width - 22 - (clearBtn.visible ? clearBtn.width + 8 : 0)
                     height: 21