fix: update base/target language on dropdown value change in activity planner (#1869)

Author: ggurdin

lib/pages/chat_list/chat_list.dart

@@ -43,7 +43,6 @@ import '../../widgets/matrix.dart';
 import 'package:fluffychat/utils/tor_stub.dart'
     if (dart.library.html) 'package:tor_detector_web/tor_detector_web.dart';
 
-
 enum PopupMenuAction {
   settings,
   invite,

lib/pangea/activity_planner/activity_planner_page.dart

@@ -19,6 +19,7 @@ import 'package:fluffychat/pangea/instructions/instructions_enum.dart';
 import 'package:fluffychat/pangea/instructions/instructions_inline_tooltip.dart';
 import 'package:fluffychat/pangea/learning_settings/constants/language_constants.dart';
 import 'package:fluffychat/pangea/learning_settings/enums/language_level_type_enum.dart';
+import 'package:fluffychat/pangea/learning_settings/utils/language_list_util.dart';
 import 'package:fluffychat/pangea/learning_settings/widgets/p_language_dropdown.dart';
 import 'package:fluffychat/widgets/matrix.dart';
 
@@ -276,10 +277,15 @@ class ActivityPlannerPageState extends State<ActivityPlannerPage> {
                       PLanguageDropdown(
                         languages: MatrixState
                             .pangeaController.pLanguageStore.baseOptions,
-                        onChange: (val) =>
-                            _selectedLanguageOfInstructions = val.langCode,
-                        initialLanguage: MatrixState
-                            .pangeaController.languageController.userL1,
+                        onChange: (val) => setState(
+                          () => _selectedLanguageOfInstructions = val.langCode,
+                        ),
+                        initialLanguage: _selectedLanguageOfInstructions != null
+                            ? PangeaLanguage.byLangCode(
+                                _selectedLanguageOfInstructions!,
+                              )
+                            : MatrixState
+                                .pangeaController.languageController.userL1,
                         isL2List: false,
                         decorationText:
                             L10n.of(context).languageOfInstructionsLabel,
@@ -288,10 +294,15 @@ class ActivityPlannerPageState extends State<ActivityPlannerPage> {
                       PLanguageDropdown(
                         languages: MatrixState
                             .pangeaController.pLanguageStore.targetOptions,
-                        onChange: (val) =>
-                            _selectedTargetLanguage = val.langCode,
-                        initialLanguage: MatrixState
-                            .pangeaController.languageController.userL2,
+                        onChange: (val) => setState(
+                          () => _selectedTargetLanguage = val.langCode,
+                        ),
+                        initialLanguage: _selectedTargetLanguage != null
+                            ? PangeaLanguage.byLangCode(
+                                _selectedTargetLanguage!,
+                              )
+                            : MatrixState
+                                .pangeaController.languageController.userL2,
                         decorationText: L10n.of(context).targetLanguageLabel,
                         isL2List: true,
                       ),