diff --git a/hub/filelib-web/src/lib/FileEditor.svelte b/hub/filelib-web/src/lib/FileEditor.svelte
index 23dacb2..e3174a0 100644
--- a/hub/filelib-web/src/lib/FileEditor.svelte
+++ b/hub/filelib-web/src/lib/FileEditor.svelte
@@ -47,6 +47,11 @@
 
   async function save(): Promise<void> {
     if (file === null) return;
+    // 内容未变化时不提交,避免产生空 commit。
+    if (draft === file.content) {
+      toastOk("内容无变化,未提交");
+      return;
+    }
     try {
       const r = await api<{ version: string }>(`/database/api/projects/${projectId}/file/commits`, {
         method: "POST",