fix tablet inbox review feedback

Signed-off-by: kenny lopez <klopez4212@gmail.com>

mobile/lib/features/activity/activity_page.dart

@@ -118,12 +118,12 @@ class ActivityPage extends HookConsumerWidget {
     useEffect(() {
       if (!isWideInbox || visibleItems.isEmpty) return null;
       final hasSelectedItem = visibleItems.any(
-        (item) => item.id == selectedItemId.value,
+        (item) => item.conversationId == selectedItemId.value,
       );
       final retainsSelectedDetail =
-          selectedItemForDetail.value?.id == selectedItemId.value;
+          selectedItemForDetail.value?.conversationId == selectedItemId.value;
       if (!hasSelectedItem && !retainsSelectedDetail) {
-        selectedItemId.value = visibleItems.first.id;
+        selectedItemId.value = visibleItems.first.conversationId;
         selectedItemTarget.value = null;
         selectedItemForDetail.value = null;
       }
@@ -131,7 +131,7 @@ class ActivityPage extends HookConsumerWidget {
     }, [isWideInbox, visibleItemIdsKey, filter.value, unreadOnly.value]);
     final selectedItem =
         visibleItems.cast<InboxItem?>().firstWhere(
-          (item) => item?.id == selectedItemId.value,
+          (item) => item?.conversationId == selectedItemId.value,
           orElse: () => null,
         ) ??
         selectedItemForDetail.value;
@@ -213,7 +213,7 @@ class ActivityPage extends HookConsumerWidget {
           : thread.parentId;
 
       if (isWideInbox) {
-        selectedItemId.value = item.id;
+        selectedItemId.value = item.conversationId;
         selectedItemTarget.value = target;
         selectedItemForDetail.value = item;
         markItemRead(item);

mobile/lib/features/channels/channels_page/wide_navigation.dart

@@ -11,6 +11,7 @@ const _wideNavigationIdentityAvatarInset =
     Grid.xs + Grid.half - (Grid.quarter / 2);
 const _wideNavigationIdentityLabelGap = Grid.half + (Grid.quarter / 2);
 
+/// A top-level tablet workspace destination supplied by the Home shell.
 class WideNavigationDestination {
   final IconData icon;
   final IconData selectedIcon;
@@ -23,6 +24,7 @@ class WideNavigationDestination {
   });
 }
 
+/// Tablet channel sidebar that owns channel/profile presentation and callbacks.
 class WideChannelsNavigation extends HookConsumerWidget {
   final int? selectedIndex;
   final ValueChanged<int> onDestinationSelected;
@@ -792,6 +794,7 @@ class _WideChannelDestination extends StatelessWidget {
   }
 }
 
+/// Nested tablet channel detail surface resolved from a selected channel ID.
 class WideChannelContent extends HookConsumerWidget {
   final String channelId;
   final VoidCallback onChannelLeft;

mobile/lib/features/channels/channels_provider.dart

@@ -48,7 +48,6 @@ class ChannelsNotifier extends AsyncNotifier<List<Channel>> {
   Set<String> _participatedRootIds = {};
   Set<String> _authoredRootIds = {};
   String? _threadInterestPubkey;
-  bool _hasLoaded = false;
 
   Map<String, int> get latestObservedByChannel =>
       Map.unmodifiable(_latestObservedByChannel);
@@ -110,7 +109,6 @@ class ChannelsNotifier extends AsyncNotifier<List<Channel>> {
       subscribeLive: subscribeLive,
       fetchLastMessage: fetchLastMessage,
     );
-    _hasLoaded = true;
     return channels;
   }
 

mobile/lib/features/home/home_page.dart

@@ -35,7 +35,6 @@ class HomePage extends HookConsumerWidget {
   static const Duration _tabIconWeightDuration = Duration(milliseconds: 120);
   static const double _wideNavigationBreakpoint = 840;
   static const double _wideContentInset = Grid.half + Grid.quarter;
-  static const double _wideContentRadius = 24;
 
   static const _destinations = [
     WideNavigationDestination(
@@ -191,7 +190,7 @@ class HomePage extends HookConsumerWidget {
                               decoration: BoxDecoration(
                                 color: context.colors.surface,
                                 borderRadius: BorderRadius.circular(
-                                  HomePage._wideContentRadius,
+                                  Radii.dialog,
                                 ),
                                 // Matches desktop's Buzz content surface: a
                                 // hairline on the upper-left edge plus a very
@@ -215,7 +214,7 @@ class HomePage extends HookConsumerWidget {
                               ),
                               child: ClipRRect(
                                 borderRadius: BorderRadius.circular(
-                                  HomePage._wideContentRadius,
+                                  Radii.dialog,
                                 ),
                                 child: MediaQuery(
                                   // The desktop-like canvas is inset below the