🔥 Remove Laravel Sail, Docker, and related setup, migrate to simplified local development environment

- **Removed:** `docker-compose.yml`, Sail-specific Dockerfiles, and related scripts for PHP 8.3 setup.
- **Updated:** Documentation to reflect a shift from Docker to a direct PHP-based local development workflow.
- **Removed:** `laravel/sail` dependency from `composer.lock`.
- **Implemented:** `#[Locked]` Livewire attribute across components for read-only properties.
- **Added:** Feature tests to ensure locked properties cannot be tampered with.

resources/views/livewire/courses/create-edit-events.blade.php

@@ -6,6 +6,7 @@ use App\Models\Course;
 use App\Models\CourseEvent;
 use App\Models\Venue;
 use App\Traits\SeoTrait;
+use Livewire\Attributes\Locked;
 use Livewire\Attributes\Validate;
 use Livewire\Component;
 
@@ -17,6 +18,7 @@ class extends Component {
     public Course $course;
     public ?CourseEvent $event = null;
 
+    #[Locked]
     public $country = 'de';
 
     public string $fromDate = '';

resources/views/livewire/courses/edit.blade.php

@@ -5,6 +5,7 @@ use App\Models\Course;
 use App\Models\Lecturer;
 use App\Traits\SeoTrait;
 use Illuminate\Validation\Rule;
+use Livewire\Attributes\Locked;
 use Livewire\Attributes\Validate;
 use Livewire\Component;
 use Livewire\WithFileUploads;
@@ -25,9 +26,14 @@ class extends Component {
     public ?int $lecturer_id = null;
     public ?string $description = null;
 
-    // System fields (read-only)
+    // System fields (read-only) - locked to prevent client-side tampering
+    #[Locked]
     public ?int $created_by = null;
+
+    #[Locked]
     public ?string $created_at = null;
+
+    #[Locked]
     public ?string $updated_at = null;
 
     public function mount(): void

resources/views/livewire/lecturers/edit.blade.php

@@ -4,6 +4,7 @@ use App\Attributes\SeoDataAttribute;
 use App\Models\Lecturer;
 use App\Traits\SeoTrait;
 use Illuminate\Validation\Rule;
+use Livewire\Attributes\Locked;
 use Livewire\Attributes\Validate;
 use Livewire\Component;
 use Livewire\WithFileUploads;
@@ -34,9 +35,14 @@ class extends Component {
     public ?string $node_id = null;
     public ?string $paynym = null;
 
-    // System fields (read-only)
+    // System fields (read-only) - locked to prevent client-side tampering
+    #[Locked]
     public ?int $created_by = null;
+
+    #[Locked]
     public ?string $created_at = null;
+
+    #[Locked]
     public ?string $updated_at = null;
 
     public function mount(): void

resources/views/livewire/meetups/create-edit-events.blade.php

@@ -5,6 +5,7 @@ use App\Enums\RecurrenceType;
 use App\Models\Meetup;
 use App\Models\MeetupEvent;
 use App\Traits\SeoTrait;
+use Livewire\Attributes\Locked;
 use Livewire\Attributes\Validate;
 use Livewire\Component;
 
@@ -16,6 +17,7 @@ class extends Component {
     public Meetup $meetup;
     public ?MeetupEvent $event = null;
 
+    #[Locked]
     public $country = 'de';
 
     public string $startDate = '';

resources/views/livewire/meetups/edit.blade.php

@@ -6,6 +6,7 @@ use App\Models\Country;
 use App\Models\Meetup;
 use App\Traits\SeoTrait;
 use Illuminate\Validation\Rule;
+use Livewire\Attributes\Locked;
 use Livewire\Attributes\Validate;
 use Livewire\Component;
 use Livewire\WithFileUploads;
@@ -42,9 +43,14 @@ class extends Component {
     public ?string $github_data = null;
     public bool $visible_on_map = false;
 
-    // System fields (read-only)
+    // System fields (read-only) - locked to prevent client-side tampering
+    #[Locked]
     public ?int $created_by = null;
+
+    #[Locked]
     public ?string $created_at = null;
+
+    #[Locked]
     public ?string $updated_at = null;
 
     // New City Modal

resources/views/livewire/services/create.blade.php

@@ -4,6 +4,7 @@ use App\Attributes\SeoDataAttribute;
 use App\Enums\SelfHostedServiceType;
 use App\Livewire\Forms\ServiceForm;
 use App\Traits\SeoTrait;
+use Livewire\Attributes\Locked;
 use Livewire\Attributes\Validate;
 use Livewire\Component;
 use Livewire\WithFileUploads;
@@ -13,7 +14,9 @@ new
 class extends Component {
     use SeoTrait;
 
+    #[Locked]
     public string $country = 'de';
+
     public ServiceForm $form;
 
     public function mount(): void