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/Http/Middleware/HandleInertiaRequests.php

@@ -38,6 +38,20 @@ class HandleInertiaRequests extends Middleware
     {
         [$message, $author] = str(Inspiring::quotes()->random())->explode('-');
 
+        $supportedLocales = collect(explode(',', (string) env('APP_SUPPORTED_LOCALES', 'de,en')))
+            ->map(fn ($l) => trim((string) $l))
+            ->filter()
+            ->unique()
+            ->values()
+            ->all();
+
+        if (empty($supportedLocales)) {
+            $supportedLocales = array_values(array_unique(array_filter([
+                config('app.locale'),
+                config('app.fallback_locale'),
+            ])));
+        }
+
         return [
             ...parent::share($request),
             'name' => config('app.name'),
@@ -45,6 +59,7 @@ class HandleInertiaRequests extends Middleware
             'auth' => [
                 'user' => $request->user(),
             ],
+            'supportedLocales' => $supportedLocales,
             'sidebarOpen' => ! $request->hasCookie('sidebar_state') || $request->cookie('sidebar_state') === 'true',
         ];
     }