implemented full interactive poll support in Talk, including creation, voting, and closing functionality

lib/view/pages/talk/widgets/chat_textfield.dart

@@ -5,6 +5,7 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:nextcloud/nextcloud.dart';
 import 'package:persistent_bottom_nav_bar_v2/persistent_bottom_nav_bar_v2.dart';
 
+import '../../../../api/marianumcloud/talk/room/get_room_response.dart';
 import '../../../../api/marianumcloud/talk/send_message/send_message.dart';
 import '../../../../api/marianumcloud/talk/send_message/send_message_params.dart';
 import '../../../../api/marianumcloud/talk/share_files_to_chat.dart';
@@ -20,12 +21,19 @@ import '../../../../widget/file_pick.dart';
 import '../../../../widget/focus_behaviour.dart';
 import '../../files/files_upload_dialog.dart';
 import 'answer_reference.dart';
+import 'poll_create_sheet.dart';
 
 class ChatTextfield extends StatefulWidget {
   final String sendToToken;
   final String? selfId;
+  final GetRoomResponseObjectConversationType? roomType;
 
-  const ChatTextfield(this.sendToToken, {this.selfId, super.key});
+  const ChatTextfield(
+    this.sendToToken, {
+    this.selfId,
+    this.roomType,
+    super.key,
+  });
 
   @override
   State<ChatTextfield> createState() => _ChatTextfieldState();
@@ -160,10 +168,31 @@ class _ChatTextfieldState extends State<ChatTextfield> {
             Navigator.of(sheetCtx).pop();
           },
         ),
+        if (_pollsAllowed)
+          ListTile(
+            leading: const Icon(Icons.poll_outlined),
+            title: const Text('Umfrage erstellen'),
+            onTap: () {
+              Navigator.of(sheetCtx).pop();
+              showPollCreateSheet(
+                context,
+                token: widget.sendToToken,
+                onCreated: () {
+                  if (mounted) context.read<ChatBloc>().refresh();
+                },
+              );
+            },
+          ),
       ],
     );
   }
 
+  /// Polls can only be created in group/public conversations — the server
+  /// rejects them in one-to-one chats.
+  bool get _pollsAllowed =>
+      widget.roomType == GetRoomResponseObjectConversationType.group ||
+      widget.roomType == GetRoomResponseObjectConversationType.public;
+
   Future<void> _pickEmoji() async {
     final emoji = await showEmojiPicker(context);
     if (emoji == null || !mounted) return;