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/Widgets/UploadsPerDayChart.php

@@ -1,14 +1,13 @@
 <?php
 
 namespace App\Filament\Widgets;
-
 use Filament\Widgets\ChartWidget;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Carbon;
 
 class UploadsPerDayChart extends ChartWidget
 {
-    protected ?string $heading = 'Uploads (14 days)';
+    protected ?string $heading = null;
     protected ?string $maxHeight = '220px';
     protected ?string $pollingInterval = '60s';
 
@@ -35,7 +34,7 @@ class UploadsPerDayChart extends ChartWidget
             'labels' => $labels,
             'datasets' => [
                 [
-                    'label' => 'Uploads',
+                    'label' => __('admin.common.uploads'),
                     'data' => $data,
                     'borderColor' => '#f59e0b',
                     'backgroundColor' => 'rgba(245, 158, 11, 0.2)',
@@ -49,4 +48,9 @@ class UploadsPerDayChart extends ChartWidget
     {
         return 'line';
     }
-}
+
+    public function getHeading(): string|\Illuminate\Contracts\Support\Htmlable|null
+    {
+        return __('admin.widgets.uploads_per_day.heading');
+    }
+}