implemented keyboard-aware back navigation and refined message sending logic to prevent phantom drafts and handle mid-send navigation

lib/view/pages/talk/chat_view.dart

@@ -189,9 +189,7 @@ class _ChatViewState extends State<ChatView> with RouteAware {
     setState(() {
       _activeMatchIndex = (_activeMatchIndex + 1) % _matches.length;
     });
-    WidgetsBinding.instance.addPostFrameCallback(
-      (_) => _scrollToActiveMatch(),
-    );
+    WidgetsBinding.instance.addPostFrameCallback((_) => _scrollToActiveMatch());
   }
 
   void _goToNextMatch() {
@@ -200,9 +198,7 @@ class _ChatViewState extends State<ChatView> with RouteAware {
       _activeMatchIndex =
           (_activeMatchIndex - 1 + _matches.length) % _matches.length;
     });
-    WidgetsBinding.instance.addPostFrameCallback(
-      (_) => _scrollToActiveMatch(),
-    );
+    WidgetsBinding.instance.addPostFrameCallback((_) => _scrollToActiveMatch());
   }
 
   void _scrollToActiveMatch() {
@@ -230,8 +226,9 @@ class _ChatViewState extends State<ChatView> with RouteAware {
     final activeId = _matches.isNotEmpty
         ? _matches[_activeMatchIndex].messageId
         : null;
-    final highlightQuery =
-        _searchActive && _searchQuery.trim().isNotEmpty ? _searchQuery : null;
+    final highlightQuery = _searchActive && _searchQuery.trim().isNotEmpty
+        ? _searchQuery
+        : null;
 
     final messages = <Widget>[];
     final chronologicalMatchIndex = <int, int>{};
@@ -264,8 +261,8 @@ class _ChatViewState extends State<ChatView> with RouteAware {
       final isMatch = matchIds.contains(element.id);
       final highlight = isMatch
           ? (element.id == activeId
-              ? SearchHighlight.active
-              : SearchHighlight.secondary)
+                ? SearchHighlight.active
+                : SearchHighlight.secondary)
           : SearchHighlight.none;
 
       if (isMatch) chronologicalMatchIndex[element.id] = messages.length;
@@ -320,87 +317,102 @@ class _ChatViewState extends State<ChatView> with RouteAware {
   }
 
   @override
-  Widget build(BuildContext context) => Scaffold(
-    backgroundColor: const Color(0xffefeae2),
-    appBar: _searchActive
-        ? ChatSearchAppBar(
-            controller: _searchTextController,
-            matchCount: _matches.length,
-            activeIndex: _matches.isEmpty ? -1 : _activeMatchIndex,
-            onChanged: _onSearchChanged,
-            onClose: _exitSearchMode,
-            onPrevious: _matches.isEmpty ? null : _goToPreviousMatch,
-            onNext: _matches.isEmpty ? null : _goToNextMatch,
-          )
-        : ClickableAppBar(
-            onTap: () =>
-                TalkNavigator.pushSplitView(context, ChatInfo(widget.room)),
-            appBar: AppBar(
-              title: Row(
-                children: [
-                  widget.avatar,
-                  const SizedBox(width: 10),
-                  Expanded(
-                    child: Text(
-                      widget.room.displayName,
-                      overflow: TextOverflow.ellipsis,
-                      maxLines: 1,
-                    ),
+  Widget build(BuildContext context) {
+    // Swallow the first back gesture while the keyboard is visible so it
+    // dismisses the IME instead of popping the chat — matches platform UX
+    // expectations (e.g. WhatsApp/Telegram) and prevents accidental exits
+    // mid-typing.
+    final keyboardOpen = MediaQuery.viewInsetsOf(context).bottom > 0;
+    return PopScope(
+      canPop: !keyboardOpen,
+      onPopInvokedWithResult: (didPop, _) {
+        if (didPop) return;
+        FocusManager.instance.primaryFocus?.unfocus();
+      },
+      child: Scaffold(
+        backgroundColor: const Color(0xffefeae2),
+        appBar: _searchActive
+            ? ChatSearchAppBar(
+                controller: _searchTextController,
+                matchCount: _matches.length,
+                activeIndex: _matches.isEmpty ? -1 : _activeMatchIndex,
+                onChanged: _onSearchChanged,
+                onClose: _exitSearchMode,
+                onPrevious: _matches.isEmpty ? null : _goToPreviousMatch,
+                onNext: _matches.isEmpty ? null : _goToNextMatch,
+              )
+            : ClickableAppBar(
+                onTap: () =>
+                    TalkNavigator.pushSplitView(context, ChatInfo(widget.room)),
+                appBar: AppBar(
+                  title: Row(
+                    children: [
+                      widget.avatar,
+                      const SizedBox(width: 10),
+                      Expanded(
+                        child: Text(
+                          widget.room.displayName,
+                          overflow: TextOverflow.ellipsis,
+                          maxLines: 1,
+                        ),
+                      ),
+                    ],
                   ),
-                ],
-              ),
-              actions: [
-                IconButton(
-                  icon: const Icon(Icons.search),
-                  tooltip: 'In Chat suchen',
-                  onPressed: _enterSearchMode,
+                  actions: [
+                    IconButton(
+                      icon: const Icon(Icons.search),
+                      tooltip: 'In Chat suchen',
+                      onPressed: _enterSearchMode,
+                    ),
+                  ],
                 ),
-              ],
+              ),
+        body: DecoratedBox(
+          decoration: BoxDecoration(
+            image: DecorationImage(
+              image: const AssetImage('assets/background/chat.png'),
+              scale: 1.5,
+              opacity: 1,
+              repeat: ImageRepeat.repeat,
+              invertColors: AppTheme.isDarkMode(context),
             ),
           ),
-    body: DecoratedBox(
-      decoration: BoxDecoration(
-        image: DecorationImage(
-          image: const AssetImage('assets/background/chat.png'),
-          scale: 1.5,
-          opacity: 1,
-          repeat: ImageRepeat.repeat,
-          invertColors: AppTheme.isDarkMode(context),
+          child: Column(
+            children: [
+              Expanded(
+                child: LoadableStateConsumer<ChatBloc, ChatState>(
+                  isReady: (state) =>
+                      state.chatResponse != null &&
+                      state.currentToken == widget.room.token,
+                  enablePullToRefresh: false,
+                  child: (state, _) {
+                    final items = _buildMessages(
+                      state.chatResponse!,
+                    ).reversed.toList();
+                    return ScrollablePositionedList.builder(
+                      reverse: true,
+                      itemScrollController: _itemScrollController,
+                      itemCount: items.length,
+                      itemBuilder: (ctx, idx) => items[idx],
+                    );
+                  },
+                ),
+              ),
+              ColoredBox(
+                color: Theme.of(context).colorScheme.surface,
+                child: TalkNavigator.isSecondaryVisible(context)
+                    ? ChatTextfield(widget.room.token, selfId: widget.selfId)
+                    : SafeArea(
+                        child: ChatTextfield(
+                          widget.room.token,
+                          selfId: widget.selfId,
+                        ),
+                      ),
+              ),
+            ],
+          ),
         ),
       ),
-      child: Column(
-        children: [
-          Expanded(
-            child: LoadableStateConsumer<ChatBloc, ChatState>(
-              isReady: (state) =>
-                  state.chatResponse != null &&
-                  state.currentToken == widget.room.token,
-              enablePullToRefresh: false,
-              child: (state, _) {
-                final items =
-                    _buildMessages(state.chatResponse!).reversed.toList();
-                return ScrollablePositionedList.builder(
-                  reverse: true,
-                  itemScrollController: _itemScrollController,
-                  itemCount: items.length,
-                  itemBuilder: (ctx, idx) => items[idx],
-                );
-              },
-            ),
-          ),
-          ColoredBox(
-            color: Theme.of(context).colorScheme.surface,
-            child: TalkNavigator.isSecondaryVisible(context)
-                ? ChatTextfield(widget.room.token, selfId: widget.selfId)
-                : SafeArea(
-                    child: ChatTextfield(
-                      widget.room.token,
-                      selfId: widget.selfId,
-                    ),
-                  ),
-          ),
-        ],
-      ),
-    ),
-  );
+    );
+  }
 }

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

@@ -110,17 +110,27 @@ class _ChatTextfieldState extends State<ChatTextfield> {
     if (_textBoxController.text.isEmpty) return;
     final text = _textBoxController.text;
     final replyTo = chatBloc.state.data?.referenceMessageId?.toString();
+    final ownToken = widget.sendToToken;
     setState(() => _sendError = null);
     await SendMessage(
-      widget.sendToToken,
+      ownToken,
       SendMessageParams(text, replyTo: replyTo),
     ).run();
-    if (!mounted) return;
-    chatBloc.refresh();
-    _textBoxController.text = '';
+    // Reached only on success — SendMessage.run() throws on failure and
+    // skips this block, leaving the persisted draft as a recovery aid.
+    // Drafts live on the global SettingsCubit keyed by token, so clear
+    // them even when the user navigated away mid-send — otherwise the
+    // sent message lingers as a phantom draft on the chat list.
     _setDraft('');
-    chatBloc.setReferenceMessageId(null);
     _setDraftReply(null);
+    // The global ChatBloc may already point at a different chat (user
+    // switched mid-send); only touch it while it still references us.
+    if (chatBloc.state.data?.currentToken == ownToken) {
+      chatBloc.setReferenceMessageId(null);
+      chatBloc.refresh();
+    }
+    if (!mounted) return;
+    _textBoxController.text = '';
   }
 
   @override