Fix iOS menu text disappearing in navigation headers

Extended the ZStack overlay fix to all iOS navigation header menus
where text labels would disappear when tapping the menu:

- HomeView: "Home" title menu
- PopularView: "Popular" title with icon menu
- TrendingView: Country/flag title menu
- PlaylistsView: Playlist title with thumbnail menu
- ChannelPlaylistView: Playlist title with thumbnail menu
- OpenVideosView: Playback mode picker menu

All menus now use the same pattern as PlaybackSettings:
- Visible static label layer in ZStack
- Invisible Menu overlay with .opacity(0)
- Prevents text disappearing and resizing animations

Shared/Views/OpenVideosView.swift

@@ -144,10 +144,15 @@ struct OpenVideosView: View {
                 Spacer()
             #endif
             #if os(iOS)
-                Menu {
-                    playbackModePicker
-                } label: {
+                ZStack {
                     Text(playbackMode.description)
+
+                    Menu {
+                        playbackModePicker
+                    } label: {
+                        Text(playbackMode.description)
+                            .opacity(0)
+                    }
                 }
             #else
                 playbackModePicker

Shared/Views/PopularView.swift

@@ -90,18 +90,7 @@ struct PopularView: View {
 
     #if os(iOS)
         private var popularMenu: some View {
-            Menu {
-                ListingStyleButtons(listingStyle: $popularListingStyle)
-
-                Section {
-                    HideWatchedButtons()
-                    HideShortsButtons()
-                }
-
-                Section {
-                    SettingsButtons()
-                }
-            } label: {
+            ZStack {
                 HStack(spacing: 12) {
                     HStack(spacing: 6) {
                         Image(systemName: "chart.bar.fill")
@@ -117,8 +106,38 @@ struct PopularView: View {
                         .foregroundColor(.accentColor)
                         .imageScale(.small)
                 }
-                .transaction { t in t.animation = nil }
+
+                Menu {
+                    ListingStyleButtons(listingStyle: $popularListingStyle)
+
+                    Section {
+                        HideWatchedButtons()
+                        HideShortsButtons()
+                    }
+
+                    Section {
+                        SettingsButtons()
+                    }
+                } label: {
+                    HStack(spacing: 12) {
+                        HStack(spacing: 6) {
+                            Image(systemName: "chart.bar.fill")
+                                .foregroundColor(.primary)
+                                .imageScale(.small)
+
+                            Text("Popular")
+                                .font(.headline)
+                                .foregroundColor(.primary)
+                        }
+
+                        Image(systemName: "chevron.down.circle.fill")
+                            .foregroundColor(.accentColor)
+                            .imageScale(.small)
+                    }
+                    .opacity(0)
+                }
             }
+            .transaction { t in t.animation = nil }
         }
     #endif