Worklog, anti geo spoofing and UI Polish

lib/providers/chat_provider.dart

@@ -163,6 +163,21 @@ class ChatController {
     } catch (e) {
       if (!isOfflineSaveError(e)) rethrow;
 
+      final ref = _ref;
+      if (ref != null) {
+        final existing =
+            ref.read(offlinePendingChatMessagesProvider)[threadId] ?? [];
+        // Idempotency guard: suppress if the same body was queued within the
+        // last 10 s — prevents duplicate messages from rapid taps while offline.
+        final cutoff = AppTime.now().subtract(const Duration(seconds: 10));
+        if (existing.any((m) => m.body == body && m.createdAt.isAfter(cutoff))) {
+          debugPrint(
+            '[ChatController] duplicate offline message suppressed for thread=$threadId',
+          );
+          return;
+        }
+      }
+
       final message = ChatMessage(
         id: id,
         threadId: threadId,
@@ -171,13 +186,13 @@ class ChatController {
         createdAt: AppTime.now(),
       );
 
-      final ref = _ref;
-      if (ref != null) {
+      final ref2 = _ref;
+      if (ref2 != null) {
         final current = Map<String, List<ChatMessage>>.from(
-          ref.read(offlinePendingChatMessagesProvider),
+          ref2.read(offlinePendingChatMessagesProvider),
         );
         current[threadId] = [...(current[threadId] ?? []), message];
-        ref.read(offlinePendingChatMessagesProvider.notifier).state =
+        ref2.read(offlinePendingChatMessagesProvider.notifier).state =
             Map.unmodifiable(current);
       }
       mirrorBatchToBrick<ChatMessage>([message], tag: 'offline_chat');