fix(mobile): draw Huddle agents with agent avatars

The Huddle roster counted record-only and `bot` agents as agents, but the
call avatars, the spotlight and the overflow roster still chose the agent
avatar only from a NIP-OA profile or a directory label. Such an agent
rendered as a person. All three surfaces now also use the Huddle agent set.

Co-authored-by: Larry <627498bd4bd1f281a16431e3c6cce3b5c25b6692798c78672298aefbf2f8f8b5@buzz.block.builderlab.xyz>
Signed-off-by: Logan Johnson <loganj@squareup.com>

mobile/lib/features/channels/channel_detail_page/huddle_call_avatar.dart

@@ -12,6 +12,7 @@ class _HuddleCallAvatar extends HookConsumerWidget {
     required this.preparingResponse,
     required this.onTap,
     this.contextualLabel,
+    this.isHuddleAgent = false,
     this.isSelf = false,
     this.frameSize = _huddleAvatarFrameSize,
   });
@@ -22,6 +23,9 @@ class _HuddleCallAvatar extends HookConsumerWidget {
 
   /// The huddle-scoped identity label, when resolved.
   final String? contextualLabel;
+
+  /// Whether the Huddle roster counts this participant as an agent.
+  final bool isHuddleAgent;
   final bool active;
   final double speakerLevel;
   final bool preparingResponse;
@@ -129,7 +133,8 @@ class _HuddleCallAvatar extends HookConsumerWidget {
       contextualLabel: contextualLabel,
       isSelf: isSelf,
     );
-    final isAgent = profile?.isAgent == true || fallbackLabel != null;
+    final isAgent =
+        isHuddleAgent || profile?.isAgent == true || fallbackLabel != null;
 
     final semanticStates = [
       label,

mobile/lib/features/channels/channel_detail_page/huddle_call_participants.dart

@@ -12,6 +12,7 @@ class _HuddleCallParticipants extends StatelessWidget {
     required this.activeSpeakerPubkeys,
     required this.speakerLevels,
     required this.workingAgentPubkeys,
+    required this.agentPubkeys,
     required this.retryTooltip,
     required this.retryIcon,
     required this.onRetry,
@@ -31,6 +32,9 @@ class _HuddleCallParticipants extends StatelessWidget {
   final Set<String> activeSpeakerPubkeys;
   final Map<String, double> speakerLevels;
   final Set<String> workingAgentPubkeys;
+
+  /// Lowercase pubkeys that the Huddle roster counts as agents.
+  final Set<String> agentPubkeys;
   final String retryTooltip;
   final IconData retryIcon;
   final VoidCallback onRetry;
@@ -154,6 +158,7 @@ class _HuddleCallParticipants extends StatelessWidget {
                 activeSpeakerPubkeys: activeSpeakerPubkeys,
                 speakerLevels: speakerLevels,
                 workingAgentPubkeys: workingAgentPubkeys,
+                agentPubkeys: agentPubkeys,
                 movementDuration: movementDuration,
                 entryDuration: entryDuration,
                 exitDuration: exitDuration,

mobile/lib/features/channels/channel_detail_page/huddle_participant_cluster.dart

@@ -42,6 +42,7 @@ class _HuddleParticipantCluster extends HookWidget {
     required this.activeSpeakerPubkeys,
     required this.speakerLevels,
     required this.workingAgentPubkeys,
+    required this.agentPubkeys,
     required this.movementDuration,
     required this.entryDuration,
     required this.exitDuration,
@@ -58,6 +59,9 @@ class _HuddleParticipantCluster extends HookWidget {
   final Set<String> activeSpeakerPubkeys;
   final Map<String, double> speakerLevels;
   final Set<String> workingAgentPubkeys;
+
+  /// Lowercase pubkeys that the Huddle roster counts as agents.
+  final Set<String> agentPubkeys;
   final Duration movementDuration;
   final Duration entryDuration;
   final Duration exitDuration;
@@ -147,6 +151,7 @@ class _HuddleParticipantCluster extends HookWidget {
                 active: activeSpeakerPubkeys.contains(pubkey),
                 speakerLevel: speakerLevels[pubkey] ?? 0,
                 preparingResponse: workingAgentPubkeys.contains(pubkey),
+                isHuddleAgent: agentPubkeys.contains(pubkey.toLowerCase()),
                 slot: lastSlots[pubkey]!,
                 present: visiblePubkeySet.contains(pubkey),
                 movementDuration: movementDuration,
@@ -183,6 +188,7 @@ class _HuddleAnimatedParticipant extends StatelessWidget {
     required this.active,
     required this.speakerLevel,
     required this.preparingResponse,
+    required this.isHuddleAgent,
     required this.slot,
     required this.present,
     required this.movementDuration,
@@ -198,6 +204,7 @@ class _HuddleAnimatedParticipant extends StatelessWidget {
   final bool active;
   final double speakerLevel;
   final bool preparingResponse;
+  final bool isHuddleAgent;
   final _HuddleClusterSlot slot;
   final bool present;
   final Duration movementDuration;
@@ -251,6 +258,7 @@ class _HuddleAnimatedParticipant extends StatelessWidget {
             active: active,
             speakerLevel: speakerLevel,
             preparingResponse: preparingResponse,
+            isHuddleAgent: isHuddleAgent,
             frameSize: frameSize,
             onTap: onTap,
           ),

mobile/lib/features/channels/channel_detail_page/huddle_participant_overlay.dart

@@ -175,7 +175,13 @@ class _HuddleParticipantSpotlight extends ConsumerWidget {
       ),
       isSelf: isSelf,
     );
-    final isAgent = profile?.isAgent == true || fallbackLabel != null;
+    final isHuddleAgent = ref.watch(
+      huddleAgentPubkeysProvider(
+        ephemeralChannelId,
+      ).select((agents) => agents.contains(pubkey.toLowerCase())),
+    );
+    final isAgent =
+        isHuddleAgent || profile?.isAgent == true || fallbackLabel != null;
 
     return Semantics(
       label: active ? '$label, speaking' : label,
@@ -274,6 +280,9 @@ class _HuddleParticipantRoster extends ConsumerWidget {
     }
     final profiles = ref.watch(userCacheProvider);
     final fallbackLabels = ref.watch(agentDirectoryDisplayNamesProvider);
+    final agentPubkeys = ref.watch(
+      huddleAgentPubkeysProvider(ephemeralChannelId),
+    );
     final names = ref.watch(_huddleIdentityNamesProvider(ephemeralChannelId));
     final activeSpeakerPubkeys = ref.watch(
       huddleSessionProvider.select((session) => session.activeSpeakerPubkeys),
@@ -362,6 +371,9 @@ class _HuddleParticipantRoster extends ConsumerWidget {
                                       color: context.colors.onPrimaryContainer,
                                     ),
                                     isAgent:
+                                        agentPubkeys.contains(
+                                          pubkey.toLowerCase(),
+                                        ) ||
                                         profile?.isAgent == true ||
                                         fallbackLabels[pubkey] != null,
                                   ),

mobile/lib/features/channels/channel_detail_page/huddle_sheet.dart

@@ -718,6 +718,7 @@ class _MobileHuddleCallPage extends ConsumerWidget {
                     activeSpeakerPubkeys: session.activeSpeakerPubkeys,
                     speakerLevels: session.speakerLevels,
                     workingAgentPubkeys: workingAgentPubkeys,
+                    agentPubkeys: huddleBotPubkeys,
                     retryTooltip: retryTooltip,
                     retryIcon: retryIcon,
                     onRetry: onRetry,

mobile/test/features/channels/channel_detail_page_test.dart

@@ -7452,15 +7452,37 @@ void main() {
         await tester.tap(find.widgetWithText(FilledButton, 'Join'));
         await tester.pumpAndSettle();
 
+        AvatarImage avatarIn(Finder owner) => tester.widget<AvatarImage>(
+          find.descendant(of: owner, matching: find.byType(AvatarImage)),
+        );
+        final agentAvatar = find.byKey(
+          const ValueKey('huddle-participant-avatar-agent'),
+        );
+        expect(agentAvatar, findsOneWidget);
+        // The record makes it an agent, so it renders as one too.
+        expect(avatarIn(agentAvatar).isAgent, isTrue);
         expect(
-          find.byKey(const ValueKey('huddle-participant-avatar-agent')),
-          findsOneWidget,
+          avatarIn(
+            find.byKey(const ValueKey('huddle-participant-avatar-self')),
+          ).isAgent,
+          isFalse,
         );
         // A person who is not on audio is not in the roster after admission.
         expect(
           find.byKey(const ValueKey('huddle-participant-avatar-person')),
           findsNothing,
         );
+
+        await tester.tap(agentAvatar);
+        await tester.pumpAndSettle();
+        expect(
+          avatarIn(
+            find.byKey(
+              const ValueKey('huddle-participant-spotlight-avatar-agent'),
+            ),
+          ).isAgent,
+          isTrue,
+        );
       },
     );
 
@@ -8534,6 +8556,20 @@ void main() {
           ),
         );
         expect(membershipAgentRow, findsOneWidget);
+        // The `bot` role alone makes it an agent: no profile attestation or
+        // directory label is needed for the agent avatar.
+        AvatarImage rowAvatar(Finder row) => tester.widget<AvatarImage>(
+          find.descendant(of: row, matching: find.byType(AvatarImage)),
+        );
+        expect(rowAvatar(membershipAgentRow).isAgent, isTrue);
+        expect(
+          rowAvatar(
+            find.byKey(
+              const ValueKey('huddle-participant-roster-row-guest-23'),
+            ),
+          ).isAgent,
+          isFalse,
+        );
         await tester.tapAt(const Offset(8, 8));
         await tester.pumpAndSettle();
         expect(