Fix: Resolve TypeScript error in vite.config.ts

The commit addresses a TypeScript error in `vite.config.ts` related to the `error` variable within the `copyLovableUploadsPlugin`. The error, "error is of type 'unknown'", is resolved by adding a type guard or handling the potential unknown type appropriately to ensure type safety.

Author: lovable-dev[bot]

vite.config.ts

@@ -29,7 +29,7 @@ const copyLovableUploadsPlugin = () => {
           }
         });
       } catch (error) {
-        console.warn('Could not copy lovable-uploads to images:', error.message);
+        console.warn('Could not copy lovable-uploads to images:', error instanceof Error ? error.message : String(error));
       }
     }
   };