chore: add larastan

app/Models/Device.php

@@ -142,6 +142,7 @@ class Device extends Model
     public function getNextPlaylistItem(): ?PlaylistItem
     {
         // Get all active playlists
+        /** @var \Illuminate\Support\Collection|Playlist[] $playlists */
         $playlists = $this->playlists()
             ->where('is_active', true)
             ->get();

app/Models/Playlist.php

@@ -60,6 +60,7 @@ class Playlist extends Model
         }
 
         // Get active playlist items ordered by display order
+        /** @var \Illuminate\Support\Collection|PlaylistItem[] $playlistItems */
         $playlistItems = $this->items()
             ->where('is_active', true)
             ->orderBy('order')

app/Models/PlaylistItem.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use Exception;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
@@ -138,7 +139,9 @@ class PlaylistItem extends Model
     {
         if (! $this->isMashup()) {
             return view('trmnl-layouts.single', [
-                'slot' => $this->plugin->render('full', false),
+                'slot' => $this->plugin instanceof Plugin
+                    ? $this->plugin->render('full', false)
+                    : throw new Exception('Invalid plugin instance'),
             ])->render();
         }