🔥 Remove redundant PRD.md file, update media models with stricter MIME type validation, and refine media conversion settings.

app/Models/ProjectProposal.php

@@ -16,29 +16,31 @@ use Spatie\Sluggable\SlugOptions;
 
 class ProjectProposal extends Model implements HasMedia
 {
-    use InteractsWithMedia;
     use HasFactory;
     use HasSlug;
+    use InteractsWithMedia;
 
     /**
      * The attributes that aren't mass assignable.
+     *
      * @var array
      */
     protected $guarded = [];
 
     /**
      * The attributes that should be cast to native types.
+     *
      * @var array
      */
     protected $casts = [
-        'id'      => 'integer',
+        'id' => 'integer',
         'user_id' => 'integer',
     ];
 
     protected static function booted()
     {
         static::creating(function ($model) {
-            if (!$model->created_by) {
+            if (! $model->created_by) {
                 $model->created_by = auth()->id();
             }
         });
@@ -47,28 +49,29 @@ class ProjectProposal extends Model implements HasMedia
     public function getSlugOptions(): SlugOptions
     {
         return SlugOptions::create()
-                          ->generateSlugsFrom(['name'])
-                          ->saveSlugsTo('slug')
-                          ->usingLanguage(Cookie::get('lang', config('app.locale')));
+            ->generateSlugsFrom(['name'])
+            ->saveSlugsTo('slug')
+            ->usingLanguage(Cookie::get('lang', config('app.locale')));
     }
 
-    public function registerMediaConversions(Media $media = null): void
+    public function registerMediaConversions(?Media $media = null): void
     {
         $this
             ->addMediaConversion('preview')
             ->fit(Manipulations::FIT_CROP, 300, 300)
             ->nonQueued();
         $this->addMediaConversion('thumb')
-             ->fit(Manipulations::FIT_CROP, 130, 130)
-             ->width(130)
-             ->height(130);
+            ->fit(Manipulations::FIT_CROP, 130, 130)
+            ->width(130)
+            ->height(130);
     }
 
     public function registerMediaCollections(): void
     {
         $this->addMediaCollection('main')
-             ->singleFile()
-             ->useFallbackUrl(asset('img/einundzwanzig.png'));
+            ->acceptsMimeTypes(['image/jpeg', 'image/png', 'image/gif', 'image/webp'])
+            ->singleFile()
+            ->useFallbackUrl(asset('img/einundzwanzig.png'));
     }
 
     public function user(): BelongsTo