simplified code across the app and consolidated duplicated helpers

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

@@ -105,9 +105,7 @@ class _ChatTextfieldState extends State<ChatTextfield> {
     if (messageId != null) {
       talkSettings.draftReplies[widget.sendToToken] = messageId;
     } else {
-      talkSettings.draftReplies.removeWhere(
-        (key, _) => key == widget.sendToToken,
-      );
+      talkSettings.draftReplies.remove(widget.sendToToken);
     }
   }
 
@@ -285,43 +283,36 @@ class _ChatTextfieldState extends State<ChatTextfield> {
   @override
   Widget build(BuildContext context) {
     final chatBloc = context.read<ChatBloc>();
-    // Only the reply reference is rendered from the chat state; loading flags
-    // and paging emits don't need to rebuild the input.
-    final (referenceMessageId, chatResponse) = context.select(
-      (ChatBloc b) => (
-        b.state.data?.referenceMessageId,
-        b.state.data?.chatResponse,
-      ),
-    );
+    // Only the resolved reply reference is rendered from the chat state;
+    // incoming messages, loading flags and paging emits don't rebuild the input.
+    final referenceMessage = context.select((ChatBloc b) {
+      final data = b.state.data;
+      final id = data?.referenceMessageId;
+      if (id == null) return null;
+      return data!.chatResponse?.data.where((e) => e.id == id).firstOrNull;
+    });
 
     Widget replyBanner = const SizedBox.shrink();
-    if (referenceMessageId != null && chatResponse != null) {
-      try {
-        final referenceMessage = chatResponse.data.firstWhere(
-          (e) => e.id == referenceMessageId,
-        );
-        replyBanner = Row(
-          children: [
-            Expanded(
-              child: AnswerReference(
-                referenceMessage: referenceMessage,
-                selfId: widget.selfId,
-              ),
+    if (referenceMessage != null) {
+      replyBanner = Row(
+        children: [
+          Expanded(
+            child: AnswerReference(
+              referenceMessage: referenceMessage,
+              selfId: widget.selfId,
             ),
-            IconButton(
-              tooltip: 'Antwort verwerfen',
-              onPressed: () {
-                chatBloc.setReferenceMessageId(null);
-                _setDraftReply(null);
-              },
-              icon: const Icon(Icons.close_outlined),
-              padding: const EdgeInsets.only(left: 0),
-            ),
-          ],
-        );
-      } catch (_) {
-        /* reference no longer in current chat data */
-      }
+          ),
+          IconButton(
+            tooltip: 'Antwort verwerfen',
+            onPressed: () {
+              chatBloc.setReferenceMessageId(null);
+              _setDraftReply(null);
+            },
+            icon: const Icon(Icons.close_outlined),
+            padding: const EdgeInsets.only(left: 0),
+          ),
+        ],
+      );
     }
 
     WidgetsBinding.instance.addPostFrameCallback((_) => _publishHeight());