made logic for determining if warning should show in translated card more readable and moved out of build function

lib/pangea/widgets/chat/message_translation_card.dart

@@ -10,7 +10,6 @@ import 'package:fluffychat/pangea/widgets/chat/toolbar_content_loading_indicator
 import 'package:fluffychat/pangea/widgets/igc/card_error_widget.dart';
 import 'package:fluffychat/widgets/matrix.dart';
 import 'package:flutter/material.dart';
-import 'package:matrix/matrix.dart';
 
 class MessageTranslationCard extends StatefulWidget {
   final PangeaMessageEvent messageEvent;
@@ -133,6 +132,22 @@ class MessageTranslationCardState extends State<MessageTranslationCard> {
     setState(() {});
   }
 
+  /// Show warning if message's language code is user's L1
+  /// or if translated text is same as original text.
+  /// Warning does not show if was previously closed
+  bool get showWarning {
+    if (MatrixState.pangeaController.instructions.wereInstructionsTurnedOff(
+      InlineInstructions.l1Translation.toString(),
+    )) return false;
+
+    final bool isWrittenInL1 =
+        l1Code != null && widget.messageEvent.originalSent?.langCode == l1Code;
+    final bool isTextIdentical = selectionTranslation != null &&
+        widget.messageEvent.originalSent?.text == selectionTranslation;
+
+    return isWrittenInL1 || isTextIdentical;
+  }
+
   @override
   Widget build(BuildContext context) {
     if (!_fetchingRepresentation &&
@@ -141,19 +156,6 @@ class MessageTranslationCardState extends State<MessageTranslationCard> {
       return const CardErrorWidget();
     }
 
-    // Show warning if message's language code is user's L1
-    // or if translated text is same as original text
-    // Warning does not show if was previously closed
-    final bool showWarning = widget.messageEvent.originalSent != null &&
-        ((!widget.immersionMode &&
-                widget.messageEvent.originalSent!.langCode.equals(l1Code)) ||
-            (selectionTranslation == null ||
-                widget.messageEvent.originalSent!.text
-                    .equals(selectionTranslation))) &&
-        !MatrixState.pangeaController.instructions.wereInstructionsTurnedOff(
-          InlineInstructions.l1Translation.toString(),
-        );
-
     return Container(
       child: _fetchingRepresentation
           ? const ToolbarContentLoadingIndicator()