✨ **Enhance input validation and error handling across APIs**

- 🛠️ Refactored controllers to utilize `FiltersNumericIds` concern, ensuring secure numeric ID filtering and avoiding type-sensitive errors in queries.
- ➕ Added feature tests to validate robust input hardening for non-numeric or malformed query parameters (`user_id`, `selected[]`).
- 🔒 Introduced `PublicPropertyNotFoundException` handling in Livewire, returning 400 for invalid property probes and suppressing unnecessary log entries.
- ❌ Updated `MeetupEventController` to handle invalid date formats gracefully, aborting with a 400 response instead of 500.
- ✅ Expanded exception handling pipeline for enhanced resilience against malformed input, bot noise, and exploitable probes.

app/Http/Controllers/Api/CityController.php

@@ -2,6 +2,7 @@
 
 namespace App\Http\Controllers\Api;
 
+use App\Http\Controllers\Api\Concerns\FiltersNumericIds;
 use App\Http\Controllers\Controller;
 use App\Http\Requests\Api\StoreCityRequest;
 use App\Http\Requests\Api\UpdateCityRequest;
@@ -20,6 +21,8 @@ use Symfony\Component\HttpFoundation\Response;
 #[Group(name: 'Stammdaten', weight: 5)]
 class CityController extends Controller
 {
+    use FiltersNumericIds;
+
     /**
      * Städte auflisten und durchsuchen
      *
@@ -40,8 +43,7 @@ class CityController extends Controller
             )
             ->when(
                 $request->exists('selected'),
-                fn (Builder $query) => $query->whereIn('id',
-                    $request->input('selected', [])),
+                fn (Builder $query) => $query->whereIn('id', $this->numericIds($request)),
                 fn (Builder $query) => $query->limit(10)
             )
             ->get();