add warning when trying to enable multiple themes

app/Facades/Plugins.php

@@ -20,6 +20,7 @@ use Filament\Panel;
  * @method static void enablePlugin(string|Plugin $plugin)
  * @method static void disablePlugin(string|Plugin $plugin)
  * @method static void updateLoadOrder(array<int, string> $order)
+ * @method static bool hasThemePluginEnabled()
  *
  * @see \App\Services\Helpers\PluginService
  */

app/Filament/Admin/Resources/PluginResource.php

@@ -104,6 +104,9 @@ class PluginResource extends Resource
                     ->icon('tabler-check')
                     ->color('success')
                     ->visible(fn (Plugin $plugin) => $plugin->canEnable())
+                    ->requiresConfirmation(fn (Plugin $plugin) => $plugin->isTheme() && Plugins::hasThemePluginEnabled())
+                    ->modalHeading('Theme already enabled')
+                    ->modalDescription('You already have a theme enabled. Enabling multiple themes can result in visual bugs. Do you want to continue?')
                     ->action(function (Plugin $plugin) {
                         Plugins::enablePlugin($plugin);
 

app/Models/Plugin.php

@@ -243,6 +243,11 @@ class Plugin extends Model implements HasPluginSettings
         return !str($this->panel_version)->startsWith('^');
     }
 
+    public function isTheme(): bool
+    {
+        return $this->category === 'theme';
+    }
+
     /** @return null|array<string, array{version: string, download_url: string}> */
     private function getUpdateData(): ?array
     {

app/Services/Helpers/PluginService.php

@@ -297,4 +297,16 @@ class PluginService
             ]);
         }
     }
+
+    public function hasThemePluginEnabled(): bool
+    {
+        $plugins = Plugin::query()->orderBy('load_order')->get();
+        foreach ($plugins as $plugin) {
+            if ($plugin->isTheme() && $plugin->isEnabled()) {
+                return true;
+            }
+        }
+
+        return false;
+    }
 }