fix(storage): handle local storage in getCurrentBucketUrl()

Fixed bug where getCurrentBucketUrl() returned empty string for local
storage provider, which would cause broken file URLs if the save-media
endpoint was called with local storage.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: kaumudpa

libraries/nestjs-libraries/src/upload/s3.utils.ts

@@ -82,6 +82,9 @@ export function getCurrentBucketUrl(): string {
       return getS3BucketUrlFromEnv();
     case 'cloudflare':
       return (process.env.CLOUDFLARE_BUCKET_URL || '').replace(/\/$/, '');
+    case 'local':
+      // Local storage uses FRONTEND_URL/uploads as the base URL
+      return (process.env.FRONTEND_URL || '').replace(/\/$/, '') + '/uploads';
     default:
       return '';
   }