diff --git a/packages/drizzle-pkg/db.sqlite b/packages/drizzle-pkg/db.sqlite
index 3f8aa14..b1eb4fa 100644
Binary files a/packages/drizzle-pkg/db.sqlite and b/packages/drizzle-pkg/db.sqlite differ
diff --git a/server/api/file/upload.post.ts b/server/api/file/upload.post.ts
index b3b1bca..cfe679d 100644
--- a/server/api/file/upload.post.ts
+++ b/server/api/file/upload.post.ts
@@ -102,6 +102,8 @@ export default defineWrappedResponseHandler(async (event) => {
       const stem = path.parse(file.filename).name;
       const finalName = `${stem}.webp`;
       const finalPath = path.join(uploadDir, finalName);
+      // sharp 不允许输入与输出指向同一路径（常见于原图本身就是 webp）
+      const tempOutputPath = file.path === finalPath ? path.join(uploadDir, `${stem}-converted.webp`) : finalPath;
 
       try {
         await sharp(file.path)
@@ -113,11 +115,11 @@ export default defineWrappedResponseHandler(async (event) => {
             withoutEnlargement: true,
           })
           .webp({ quality: MEDIA_WEBP_QUALITY })
-          .toFile(finalPath);
+          .toFile(tempOutputPath);
       } catch (procErr) {
-        if (fs.existsSync(finalPath)) {
+        if (fs.existsSync(tempOutputPath)) {
           try {
-            fs.unlinkSync(finalPath);
+            fs.unlinkSync(tempOutputPath);
           } catch {
             /* ignore */
           }
@@ -126,6 +128,17 @@ export default defineWrappedResponseHandler(async (event) => {
         throw createError({ statusCode: 400, statusMessage: msg });
       }
 
+      if (tempOutputPath !== finalPath) {
+        if (fs.existsSync(finalPath)) {
+          try {
+            fs.unlinkSync(finalPath);
+          } catch {
+            /* ignore */
+          }
+        }
+        fs.renameSync(tempOutputPath, finalPath);
+      }
+
       if (file.path !== finalPath) {
         try {
           fs.unlinkSync(file.path);