Fix flickering issues due to reconnecting loop

lib/screens/tickets/ticket_detail_screen.dart

@@ -6,7 +6,6 @@ import 'package:supabase_flutter/supabase_flutter.dart';
 
 import '../../models/office.dart';
 import '../../models/profile.dart';
-import '../../models/task.dart';
 import '../../models/ticket.dart';
 import '../../models/ticket_message.dart';
 import '../../providers/notifications_provider.dart';
@@ -57,12 +56,13 @@ class _TicketDetailScreenState extends ConsumerState<TicketDetailScreen> {
 
   @override
   Widget build(BuildContext context) {
-    final ticket = _findTicket(ref, widget.ticketId);
+    // Use per-item providers to avoid rebuilding when unrelated tickets/tasks
+    // change.  Only the specific ticket for this screen triggers rebuilds.
+    final ticket = ref.watch(ticketByIdProvider(widget.ticketId));
     final messagesAsync = ref.watch(ticketMessagesProvider(widget.ticketId));
     final profilesAsync = ref.watch(profilesProvider);
     final officesAsync = ref.watch(officesProvider);
     final currentProfileAsync = ref.watch(currentProfileProvider);
-    final tasksAsync = ref.watch(tasksProvider);
     final typingState = ref.watch(typingIndicatorProvider(widget.ticketId));
     final canPromote = currentProfileAsync.maybeWhen(
       data: (profile) => profile != null && _canPromote(profile.role),
@@ -76,7 +76,7 @@ class _TicketDetailScreenState extends ConsumerState<TicketDetailScreen> {
     final showAssign = canAssign && ticket?.status != 'closed';
     final taskForTicket = ticket == null
         ? null
-        : _findTaskForTicket(tasksAsync, ticket.id);
+        : ref.watch(taskByTicketIdProvider(ticket.id));
     final hasStaffMessage = _hasStaffMessage(
       messagesAsync.valueOrNull ?? const [],
       profilesAsync.valueOrNull ?? const [],
@@ -477,15 +477,6 @@ class _TicketDetailScreenState extends ConsumerState<TicketDetailScreen> {
     return 'Filed by: $name';
   }
 
-  Ticket? _findTicket(WidgetRef ref, String ticketId) {
-    final ticketsAsync = ref.watch(ticketsProvider);
-    return ticketsAsync.maybeWhen(
-      data: (tickets) =>
-          tickets.where((ticket) => ticket.id == ticketId).firstOrNull,
-      orElse: () => null,
-    );
-  }
-
   bool _hasStaffMessage(List<TicketMessage> messages, List<Profile> profiles) {
     if (messages.isEmpty || profiles.isEmpty) {
       return false;
@@ -508,14 +499,6 @@ class _TicketDetailScreenState extends ConsumerState<TicketDetailScreen> {
     );
   }
 
-  Task? _findTaskForTicket(AsyncValue<List<Task>> tasksAsync, String ticketId) {
-    return tasksAsync.maybeWhen(
-      data: (tasks) =>
-          tasks.where((task) => task.ticketId == ticketId).firstOrNull,
-      orElse: () => null,
-    );
-  }
-
   Future<void> _handleSendMessage(
     WidgetRef ref,
     List<Profile> profiles,