Fix Event & EventType resource issues and apply formatting

- Fix EventType deletion error handling (constraint violations)
- Fix Event update error (package_id column missing)
- Fix Event Type dropdown options (JSON display issue)
- Fix EventPackagesRelationManager query error
- Add missing translations for deletion errors
- Apply Pint formatting

database/migrations/2025_09_01_000500_create_legal_pages.php

@@ -10,7 +10,7 @@ return new class extends Migration
     public function up(): void
     {
         // Legal Pages table
-        if (!Schema::hasTable('legal_pages')) {
+        if (! Schema::hasTable('legal_pages')) {
             Schema::create('legal_pages', function (Blueprint $table) {
                 $table->id();
                 $table->string('slug', 32);
@@ -86,7 +86,7 @@ return new class extends Migration
 
     private function impressumDe(): string
     {
-        return <<<MD
+        return <<<'MD'
 # Impressum
 
 Anbieter dieser Seiten:
@@ -223,4 +223,4 @@ Es gilt deutsches Recht. Gerichtsstand ist, soweit zulässig, der Sitz des Betre
 Stand: {$date}
 MD;
     }
-};
+};