feat(storage): persist local images and unify clipboard copying

Add a private images disk with persistent container mounts and installation/upgrade setup, while routing avatar and project icon storage through it. Reuse the copy button component for API tokens and support clipboard copying through the shared helper.

app/Services/AvatarStorageService.php

@@ -71,7 +71,7 @@ class AvatarStorageService
     protected function disk(string $storageType, ?int $s3StorageId): FilesystemAdapter
     {
         if ($storageType !== 's3') {
-            return Storage::disk('local');
+            return Storage::disk('images');
         }
 
         $storage = S3Storage::query()->whereKey($s3StorageId)->where('is_usable', true)->first();