✨ Enhance meetup association and permissions management

- 🔍 Added `resolveInScope` method to `ResolvesEntities` for scoped entity resolution with stricter control.
- 👥 Introduced `AddMeetupToMineTool` MCP tool for adding external meetups to "My Meetups."
- 🛠️ Updated `ListMyMeetupsTool` and `ShowMyMeetupTool` to include both created and joined meetups.
- 📚 Updated `Meetup` model with `associatedWith` scope for querying user-related meetups.
- ✅ Expanded feature tests for meetup membership, creator permissions, and scoped tool usage.
- 🛡️ Unified access checks across Livewire and APIs to restrict editing meetup details to creators or super-admins.
- 🔗 Registered `AddMeetupToMineTool` in `EinundzwanzigServer`.

app/Models/Meetup.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
@@ -67,6 +68,17 @@ class Meetup extends Model implements HasMedia
                 $model->created_by = auth()->id();
             }
         });
+
+        // Der Ersteller wird automatisch als Leiter in die meetup_user-Pivot eingetragen,
+        // damit das Meetup einheitlich (MCP, REST-API, Livewire) in „Meine Meetups"
+        // erscheint – egal über welchen Pfad es angelegt wurde.
+        static::created(function (Meetup $model): void {
+            if ($model->created_by !== null) {
+                $model->users()->syncWithoutDetaching([
+                    $model->created_by => ['is_leader' => true],
+                ]);
+            }
+        });
     }
 
     public function getSlugOptions(): SlugOptions
@@ -109,6 +121,18 @@ class Meetup extends Model implements HasMedia
         return $this->belongsToMany(User::class);
     }
 
+    /**
+     * Meetups, die dem Nutzer zugeordnet sind: selbst erstellt (created_by) ODER
+     * Mitglied über die meetup_user-Pivot. Entspricht „Meine Meetups" im Portal.
+     */
+    public function scopeAssociatedWith(Builder $query, int $userId): void
+    {
+        $query->where(function (Builder $inner) use ($userId): void {
+            $inner->where('created_by', $userId)
+                ->orWhereHas('users', fn (Builder $user) => $user->whereKey($userId));
+        });
+    }
+
     public function city(): BelongsTo
     {
         return $this->belongsTo(City::class);