feat(profile): add username + preferred_locale; wire to Inertia + middleware

- DB: users.username (unique), users.preferred_locale (default from app.locale)
- Backend: validation, model fillable; share supportedLocales; SetLocaleFromUser
- Frontend: profile page fields + types
- Filament: SuperAdmin profile page with username/language

feat(admin-nav): move Tasks to Bibliothek and add menu labels

fix(tasks-table): show localized title/emotion/event type; add translated headers

feat(l10n): add missing table headers for emotions and event types; normalize en/de files

refactor: tidy translations for tasks/emotions/event types

app/Filament/Resources/TaskResource/Pages/ImportTasks.php

@@ -15,7 +15,7 @@ class ImportTasks extends Page
 {
     protected static string $resource = TaskResource::class;
     protected string $view = 'filament.resources.task-resource.pages.import-tasks';
-    protected ?string $heading = 'Import Tasks (CSV)';
+    protected ?string $heading = null;
 
     public ?string $file = null;
 
@@ -23,7 +23,7 @@ class ImportTasks extends Page
     {
         return $form->schema([
             FileUpload::make('file')
-                ->label('CSV file')
+                ->label(__('admin.common.csv_file'))
                 ->acceptedFileTypes(['text/csv', 'text/plain'])
                 ->directory('imports')
                 ->required(),
@@ -36,7 +36,7 @@ class ImportTasks extends Page
 
         $path = $this->form->getState()['file'] ?? null;
         if (!$path || !Storage::disk('public')->exists($path)) {
-            Notification::make()->danger()->title('File not found')->send();
+            Notification::make()->danger()->title(__('admin.notifications.file_not_found'))->send();
             return;
         }
 
@@ -45,11 +45,16 @@ class ImportTasks extends Page
 
         Notification::make()
             ->success()
-            ->title("Imported {$ok} rows")
-            ->body($fail ? "{$fail} failed" : null)
+            ->title(__('admin.notifications.imported_rows', ['count' => $ok]))
+            ->body($fail ? __('admin.notifications.failed_count', ['count' => $fail]) : null)
             ->send();
     }
 
+    public function getHeading(): string
+    {
+        return __('admin.tasks.import.heading');
+    }
+
     private function importTasksCsv(string $file): array
     {
         $handle = fopen($file, 'r');