fix: disable emoji setting for non-L2 constructs (#5148)

lib/pangea/analytics_misc/lemma_emoji_setter_mixin.dart

@@ -13,9 +13,17 @@ import 'package:fluffychat/widgets/matrix.dart';
 mixin LemmaEmojiSetter {
   Future<void> setLemmaEmoji(
     ConstructIdentifier constructId,
+    String langCode,
     String emoji,
     String? targetId,
   ) async {
+    final userL2 =
+        MatrixState.pangeaController.userController.userL2?.langCodeShort;
+    if (langCode.split("-").first != userL2) {
+      // only set emoji for user's L2 language
+      return;
+    }
+
     if (constructId.userSetEmoji == null) {
       _getEmojiAnalytics(
         constructId,

lib/pangea/toolbar/word_card/lemma_reaction_picker.dart

@@ -58,6 +58,11 @@ class LemmaReactionPickerState extends State<LemmaReactionPicker> {
     super.dispose();
   }
 
+  bool get _enabled =>
+      (widget.langCode.split("-").first ==
+          MatrixState.pangeaController.userController.userL2?.langCodeShort) &&
+      widget.enabled;
+
   void _setEmojiSub() {
     _emojiSub?.cancel();
     _emojiSub = Matrix.of(context)
@@ -90,7 +95,12 @@ class LemmaReactionPickerState extends State<LemmaReactionPicker> {
     String emoji,
     String targetId,
   ) async {
-    await widget.setLemmaEmoji(widget.constructId, emoji, targetId);
+    await widget.setLemmaEmoji(
+      widget.constructId,
+      widget.langCode,
+      emoji,
+      targetId,
+    );
     messenger = ScaffoldMessenger.of(context);
     widget.showLemmaEmojiSnackbar(
       messenger!,
@@ -145,7 +155,7 @@ class LemmaReactionPickerState extends State<LemmaReactionPicker> {
               size: 12.0,
             )
           : null,
-      enabled: widget.enabled,
+      enabled: _enabled,
     );
   }
 }