✨ Refactor components and models:

- 🔥 Removed deprecated `placeholder-pattern` component.
- 🧹 Simplified and cleaned up Blade views by removing unused comments and sections.
- 🗂️ Extracted `SetsCreatedBy` concern for DRY and reused it across models.
- 🔧 Consolidated configuration for Horizon `authorized_nostr_keys`.
- 🧪 Migrated media conversion to use new Spatie enums for clarity.
- ♻️ Replaced repetitive link rendering with dynamic rendering in meetups and services views.

app/Models/MeetupEvent.php

@@ -4,6 +4,7 @@ namespace App\Models;
 
 use App\Enums\RecurrenceType;
 use App\Enums\RsvpStatus;
+use App\Models\Concerns\SetsCreatedBy;
 use App\Observers\MeetupEventObserver;
 use Illuminate\Database\Eloquent\Attributes\ObservedBy;
 use Illuminate\Database\Eloquent\Builder;
@@ -16,6 +17,7 @@ use Illuminate\Support\Collection;
 class MeetupEvent extends Model
 {
     use HasFactory;
+    use SetsCreatedBy;
 
     /**
      * The attributes that aren't mass assignable.
@@ -47,15 +49,6 @@ class MeetupEvent extends Model
         'recurrence_type' => RecurrenceType::class,
     ];
 
-    protected static function booted()
-    {
-        static::creating(function ($model) {
-            if (! $model->created_by) {
-                $model->created_by = auth()->id();
-            }
-        });
-    }
-
     /**
      * Termine, die der Nutzer bearbeiten darf: selbst angelegt ODER Leader des
      * zugehörigen Meetups (deckungsgleich mit MeetupEventPolicy::update).