feat(upload): raise image upload limit to 10MB

Made-with: Cursor

server/api/file/upload.post.ts

@@ -43,7 +43,7 @@ export default defineWrappedResponseHandler(async (event) => {
     const upload = multer({
       storage,
       limits: {
-        fileSize: 5 * 1024 * 1024, // 5MB 限制
+        fileSize: 10 * 1024 * 1024, // 10MB 限制
       },
       fileFilter: (req, file, cb) => {
         const allowedTypes = ['image/png', 'image/jpeg', 'image/jpg', 'image/webp'];