feat: Implement clear chat, delete conversation, mute, and report options within the chat screen.

lib/features/messaging/presentation/providers/messaging_provider.dart

@@ -527,6 +527,48 @@ class MessagingNotifier extends StateNotifier<MessagingState> {
       return null;
     }
   }
+
+  Future<void> clearChat(String conversationId) async {
+    try {
+      await _repository.clearChat(conversationId);
+      // Clear local messages
+      final updatedMessages =
+          Map<String, List<ChatMessage>>.from(state.messages)
+            ..[conversationId] = [];
+      // Update conversation preview
+      final updatedConversations = state.conversations.map((c) {
+        if (c.id == conversationId) {
+          return c.copyWith(lastMessageText: '', unreadCount: 0);
+        }
+        return c;
+      }).toList();
+      state = state.copyWith(
+        messages: updatedMessages,
+        conversations: updatedConversations,
+      );
+    } catch (_) {
+      state = state.copyWith(error: 'Failed to clear chat');
+    }
+  }
+
+  Future<void> deleteConversation(String conversationId) async {
+    try {
+      await _repository.deleteConversation(conversationId);
+      // Remove from local state
+      final updatedMessages =
+          Map<String, List<ChatMessage>>.from(state.messages)
+            ..remove(conversationId);
+      final updatedConversations =
+          state.conversations.where((c) => c.id != conversationId).toList();
+      state = state.copyWith(
+        messages: updatedMessages,
+        conversations: updatedConversations,
+        clearActiveConversation: true,
+      );
+    } catch (_) {
+      state = state.copyWith(error: 'Failed to delete conversation');
+    }
+  }
 }
 
 final messagingProvider =