fix(mobile): username display, huddle filtering, and channel list stability (#489)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

mobile/lib/features/channels/channels_provider.dart

@@ -56,7 +56,7 @@ class ChannelsNotifier extends AsyncNotifier<List<Channel>> {
 
   Future<List<Channel>> _fetch({bool subscribeLive = false}) async {
     final myPk = ref.read(myPubkeyProvider);
-    if (myPk == null) return const [];
+    if (myPk == null) throw StateError('No signing identity available');
 
     final session = ref.read(relaySessionProvider.notifier);
 
@@ -126,9 +126,14 @@ class ChannelsNotifier extends AsyncNotifier<List<Channel>> {
 
     final channels = <Channel>[];
     for (final event in dedupedMetas) {
-      channels.add(
-        _channelFromMeta(event, isMember: true, displayNames: displayNames),
+      final channel = _channelFromMeta(
+        event,
+        isMember: true,
+        displayNames: displayNames,
       );
+      if (!channel.isEphemeral) {
+        channels.add(channel);
+      }
     }
 
     channels.sort((left, right) {
@@ -180,6 +185,8 @@ class ChannelsNotifier extends AsyncNotifier<List<Channel>> {
       participants: participants,
       participantPubkeys: data.participantPubkeys,
       isMember: isMember,
+      ttlSeconds: data.ttlSeconds,
+      ttlDeadline: data.ttlDeadline,
     );
   }
 

mobile/lib/features/channels/compose_bar.dart

@@ -76,6 +76,17 @@ class ComposeBar extends HookConsumerWidget {
     final currentPubkey = ref.watch(currentPubkeyProvider);
     final userCache = ref.watch(userCacheProvider);
 
+    // Preload profiles for channel members so @mention suggestions show names.
+    useEffect(() {
+      final memberList = membersAsync.asData?.value ?? <ChannelMember>[];
+      if (memberList.isNotEmpty) {
+        ref
+            .read(userCacheProvider.notifier)
+            .preload(memberList.map((m) => m.pubkey).toList());
+      }
+      return null;
+    }, [membersAsync.asData?.value.length]);
+
     // Typing indicator broadcast — throttled to one event per 3 seconds.
     final lastTypingSentMs = useRef(0);
 
@@ -149,6 +160,7 @@ class ComposeBar extends HookConsumerWidget {
       members,
       mentionQuery.value,
       currentPubkey,
+      userCache,
     );
 
     // Filter channels against the query.
@@ -157,9 +169,10 @@ class ComposeBar extends HookConsumerWidget {
 
     // Insert a selected mention into the text field.
     void insertMention(ChannelMember member) {
-      final name = member.displayName?.trim().isNotEmpty == true
-          ? member.displayName!.trim()
-          : member.pubkey.substring(0, 8);
+      final cached = ref.read(userCacheProvider)[member.pubkey.toLowerCase()];
+      final name = cached?.displayName?.trim().isNotEmpty == true
+          ? cached!.displayName!.trim()
+          : '${member.pubkey.substring(0, 8)}\u2026';
       // Track the resolved pubkey so we can pass it at send time.
       mentionMap.value[name] = member.pubkey;
 
@@ -616,6 +629,7 @@ List<ChannelMember> _filterMembers(
   List<ChannelMember> members,
   String? query,
   String? currentPubkey,
+  Map<String, UserProfile> userCache,
 ) {
   if (query == null) return const [];
   final q = query.toLowerCase();
@@ -627,7 +641,9 @@ List<ChannelMember> _filterMembers(
       )
       .where((m) {
         if (q.isEmpty) return true;
-        final name = (m.displayName ?? '').toLowerCase();
+        final profile = userCache[m.pubkey.toLowerCase()];
+        final name = (profile?.displayName ?? m.displayName ?? '')
+            .toLowerCase();
         final firstName = name.split(RegExp(r'\s+')).first;
         return name.startsWith(q) ||
             firstName.startsWith(q) ||
@@ -675,11 +691,16 @@ class _MentionSuggestions extends StatelessWidget {
         separatorBuilder: (_, _) => const SizedBox.shrink(),
         itemBuilder: (context, index) {
           final member = suggestions[index];
-          final name = member.labelFor(currentPubkey);
           final profile = userCache[member.pubkey.toLowerCase()];
+          final name = profile?.displayName?.trim().isNotEmpty == true
+              ? profile!.displayName!.trim()
+              : member.labelFor(currentPubkey);
           final avatarUrl = profile?.avatarUrl;
-          final initial = (member.displayName ?? member.pubkey)[0]
-              .toUpperCase();
+          final initial =
+              (profile?.displayName?.trim().isNotEmpty == true
+                      ? profile!.displayName!.trim()
+                      : member.pubkey)[0]
+                  .toUpperCase();
 
           return ListTile(
             dense: true,

mobile/lib/features/channels/members_sheet.dart

@@ -222,7 +222,11 @@ class _MemberTile extends ConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
-    final label = member.labelFor(currentPubkey);
+    final label = isSelf
+        ? 'You'
+        : (profile?.displayName?.trim().isNotEmpty == true
+              ? profile!.displayName!.trim()
+              : member.labelFor(currentPubkey));
     final initial = label.substring(0, 1).toUpperCase();
     final showManagementActions = canManage && !isSelf && !member.isOwner;
     final showMenu = showManagementActions || onViewActivity != null;
@@ -288,7 +292,11 @@ class _MemberTile extends ConsumerWidget {
     WidgetRef ref, {
     required bool showManagementActions,
   }) {
-    final label = member.labelFor(currentPubkey);
+    final label = isSelf
+        ? 'You'
+        : (profile?.displayName?.trim().isNotEmpty == true
+              ? profile!.displayName!.trim()
+              : member.labelFor(currentPubkey));
     final canChangeRole = showManagementActions && !member.isBot;
     showModalBottomSheet<void>(
       context: context,

mobile/lib/shared/relay/nostr_models.dart

@@ -246,6 +246,8 @@ class ChannelData {
   final String description;
   final String? topic;
   final List<String> participantPubkeys;
+  final int? ttlSeconds;
+  final DateTime? ttlDeadline;
 
   const ChannelData({
     required this.id,
@@ -255,6 +257,8 @@ class ChannelData {
     required this.description,
     this.topic,
     this.participantPubkeys = const [],
+    this.ttlSeconds,
+    this.ttlDeadline,
   });
 
   factory ChannelData.fromEvent(NostrEvent event) {
@@ -280,6 +284,12 @@ class ChannelData {
       for (final t in event.tags)
         if (t.length >= 2 && t[0] == 'p') t[1],
     ];
+    final ttlRaw = event.getTagValue('ttl');
+    final ttlSeconds = ttlRaw != null ? int.tryParse(ttlRaw) : null;
+    final ttlDeadlineRaw = event.getTagValue('ttl_deadline');
+    final ttlDeadline = ttlDeadlineRaw != null
+        ? DateTime.tryParse(ttlDeadlineRaw)
+        : null;
     return ChannelData(
       id: id,
       name: name,
@@ -288,6 +298,8 @@ class ChannelData {
       description: description,
       topic: topic,
       participantPubkeys: participants,
+      ttlSeconds: ttlSeconds,
+      ttlDeadline: ttlDeadline,
     );
   }
 }