multiple runtime bugfixes for 1.5.5+65

lib/view/pages/talk/details/chat_info.dart

@@ -39,6 +39,7 @@ class _ChatInfoState extends State<ChatInfo> {
     GetParticipantsCache(
       chatToken: widget.room.token,
       onUpdate: (GetParticipantsResponse data) {
+        if (!mounted) return;
         setState(() {
           participants = data;
         });

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

@@ -2,14 +2,12 @@ import 'dart:async';
 
 import 'package:flutter/material.dart';
 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';
-import '../../../../api/marianumcloud/webdav/webdav_api.dart';
 import '../../../../state/app/modules/chat/bloc/chat_bloc.dart';
 import '../../../../state/app/modules/chat/bloc/chat_state.dart';
 import '../../../../state/app/modules/settings/bloc/settings_cubit.dart';
@@ -68,11 +66,7 @@ class _ChatTextfieldState extends State<ChatTextfield> {
   Future<void> mediaUpload(List<String>? paths) async {
     if (paths == null) return;
 
-    unawaited(
-      WebdavApi.webdav.then(
-        (webdav) => webdav.mkcol(PathUri.parse('/$talkShareFolder')),
-      ),
-    );
+    unawaited(ensureTalkShareFolder());
 
     if (!mounted) return;
     unawaited(
@@ -113,6 +107,7 @@ class _ChatTextfieldState extends State<ChatTextfield> {
   void initState() {
     super.initState();
     settings = context.read<SettingsCubit>();
+    _loadDraft();
     final draftReply = settings
         .val()
         .talkSettings
@@ -122,6 +117,24 @@ class _ChatTextfieldState extends State<ChatTextfield> {
     }
   }
 
+  @override
+  void didUpdateWidget(covariant ChatTextfield oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    // The state survives a room switch in the split view, so the draft has to
+    // follow the new token. Every edit persists through _setDraft, so the
+    // outgoing room's draft is already stored at this point.
+    if (oldWidget.sendToToken != widget.sendToToken) _loadDraft();
+  }
+
+  /// Seeds the field from the stored draft. Only ever called on mount and on a
+  /// room switch: `TextEditingController.text` resets selection and composing,
+  /// so doing this per build would drop the cursor position, any active text
+  /// selection and a running IME composition on every chat update.
+  void _loadDraft() {
+    _textBoxController.text =
+        settings.val().talkSettings.drafts[widget.sendToToken] ?? '';
+  }
+
   @override
   void dispose() {
     // Defer to end-of-frame: resetting the shared notifier synchronously during
@@ -263,8 +276,6 @@ class _ChatTextfieldState extends State<ChatTextfield> {
 
   @override
   Widget build(BuildContext context) {
-    _textBoxController.text =
-        settings.val().talkSettings.drafts[widget.sendToToken] ?? '';
     final chatBloc = context.watch<ChatBloc>();
     final chatState = chatBloc.state.data;