Fix locale reset when previewing files

Author: CodeDoctorDE

app/lib/embed/embedding.dart

@@ -15,7 +15,7 @@ class Embedding {
   Embedding({
     this.save = true,
     this.editable = true,
-    this.language = '',
+    this.language = 'user',
     this.theme = 'user',
     bool internal = false,
     this.onExit,

app/test/views/project_page_lifecycle_test.dart

@@ -260,6 +260,7 @@ void main() {
       () => observer.lastDocumentBloc?.state is DocumentLoadSuccess,
       'embedded document open',
     );
+    verifyNever(() => settingsCubit.changeLocaleTemporarily(any()));
 
     final editorController = observer.lastDocumentBloc!.editorController;
     expect(editorController.transformCubit.state.position, Offset.zero);

metadata/en-US/changelogs/189.txt

@@ -17,6 +17,7 @@
 * Fix blur resetting on color change
 * Fix polygon collision aabb tests if closed ([#1162](https://github.com/LinwoodDev/Butterfly/pull/1162)) 
 * Fix embed/web loading errors ([#1167](https://github.com/LinwoodDev/Butterfly/issues/1167))
+* Fix file previews resetting the language to the system locale
 * Upgrade to agb 9
 
 Read more here: https://linwood.dev/butterfly/2.6.0-beta.2