diff --git a/apps/web/public/vite.svg b/apps/web/public/vite.svg
new file mode 100644
index 000000000..7f7809d44
--- /dev/null
+++ b/apps/web/public/vite.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
+  <rect width="64" height="64" rx="14" fill="#3b82f6"/>
+  <text x="32" y="44" font-size="34" text-anchor="middle">🦐</text>
+</svg>
diff --git a/apps/web/src/pages/auth/WechatOnboarding.tsx b/apps/web/src/pages/auth/WechatOnboarding.tsx
index 0b237243f..38c62f345 100644
--- a/apps/web/src/pages/auth/WechatOnboarding.tsx
+++ b/apps/web/src/pages/auth/WechatOnboarding.tsx
@@ -2,11 +2,12 @@
  * 微信新用户昵称引导页
  * 新微信用户首次登录后强制填写昵称，完成后才进入主界面
  */
-import React from "react"
+import React, { useRef } from "react"
 import { Form, Input, message } from "antd"
 import { Navigate, useNavigate } from "react-router-dom"
 import { useMutation } from "@tanstack/react-query"
 import { updateProfile } from "@/api/auth"
+import { getErrorMessage, isErrorMsgShown } from "@/api/errors"
 import { useAuthStore } from "@/store/authStore"
 import Button from "@/components/ui/Button"
 import "./Login.css"
@@ -22,6 +23,10 @@ const WechatOnboarding: React.FC = () => {
   const user = useAuthStore((state) => state.user)
   const hasAccessToken = Boolean(localStorage.getItem("access_token"))
   const [form] = Form.useForm<OnboardingFormValues>()
+  // 同步防连点守卫：antd loading 要等 React 重渲染后才禁用按钮，
+  // 连点两次时第一次的 mutation 刚触发、重渲染未发生，第二次 click 仍会进来
+  // （截图里 PATCH /me 405 出现两次就是连点导致的重复提交）
+  const submittingRef = useRef(false)
 
   const saveMutation = useMutation({
     mutationFn: (displayName: string) => updateProfile({ display_name: displayName }),
@@ -37,6 +42,8 @@ const WechatOnboarding: React.FC = () => {
   }
 
   const onFinish = async (values: OnboardingFormValues) => {
+    if (submittingRef.current) return
+    submittingRef.current = true
     try {
       const updated = await saveMutation.mutateAsync(values.display_name.trim())
       // 后端返回的 profile_completed 以最新资料为准，前端同步标记完善
@@ -45,9 +52,14 @@ const WechatOnboarding: React.FC = () => {
       const redirect = localStorage.getItem("login_redirect") || "/app/dashboard"
       localStorage.removeItem("login_redirect")
       navigate(redirect, { replace: true })
-    } catch {
-      message.error("保存失败，请重试")
+    } catch (err) {
+      // 透传后端真实原因（如接口异常/校验失败）；拦截器已弹过的不重复弹
+      if (!isErrorMsgShown(err)) {
+        message.error(`昵称保存失败：${getErrorMessage(err, "请稍后重试")}`)
+      }
+      submittingRef.current = false
     }
+    // 成功时页面跳走，不复位
   }
 
   return (
@@ -89,6 +101,7 @@ const WechatOnboarding: React.FC = () => {
               buttonSize="lg"
               htmlType="submit"
               loading={saveMutation.isPending}
+              disabled={saveMutation.isPending}
               style={{ width: "100%" }}
             >
               {saveMutation.isPending ? "保存中..." : "进入小虾智剪"}
diff --git a/apps/web/src/test/pages/auth/WechatOnboarding.test.tsx b/apps/web/src/test/pages/auth/WechatOnboarding.test.tsx
index 41c4fcfa9..548d7f52e 100644
--- a/apps/web/src/test/pages/auth/WechatOnboarding.test.tsx
+++ b/apps/web/src/test/pages/auth/WechatOnboarding.test.tsx
@@ -122,6 +122,54 @@ describe("WechatOnboarding 昵称引导页", () => {
     )
   })
 
+  it("连点提交按钮只触发一次请求（防重复提交）", async () => {
+    // mutation 挂起不立即完成，模拟慢网络下连续双击
+    let resolveSubmit: (v: unknown) => void = () => {}
+    updateProfileMock = vi.fn(
+      () =>
+        new Promise((resolve) => {
+          resolveSubmit = resolve
+        }),
+    )
+    renderPage()
+    fireEvent.change(screen.getByPlaceholderText("请输入您的昵称"), {
+      target: { value: "小虾用户" },
+    })
+    const btn = screen.getByText("进入小虾智剪")
+    fireEvent.click(btn)
+    // 第一次点击后立即再点（此时重渲染/loading 可能还没生效）
+    fireEvent.click(btn)
+    fireEvent.click(btn)
+    await waitFor(() => {
+      expect(updateProfileMock).toHaveBeenCalledTimes(1)
+    })
+    // 释放挂起的 Promise，避免泄漏
+    resolveSubmit({ id: "u1", display_name: "小虾用户", profile_completed: true })
+  })
+
+  it("提交失败后守卫复位，允许再次提交", async () => {
+    updateProfileMock = vi
+      .fn()
+      .mockRejectedValueOnce({
+        isAxiosError: true,
+        response: { status: 500, data: { detail: "服务内部错误" } },
+      })
+      .mockResolvedValueOnce({ id: "u1", display_name: "小虾用户", profile_completed: true })
+    renderPage()
+    fireEvent.change(screen.getByPlaceholderText("请输入您的昵称"), {
+      target: { value: "小虾用户" },
+    })
+    fireEvent.click(screen.getByText("进入小虾智剪"))
+    await waitFor(() => {
+      expect(updateProfileMock).toHaveBeenCalledTimes(1)
+    })
+    // 失败后再点一次，应能重新提交
+    fireEvent.click(screen.getByText("进入小虾智剪"))
+    await waitFor(() => {
+      expect(updateProfileMock).toHaveBeenCalledTimes(2)
+    })
+  })
+
   it("提交失败显示错误且不跳转", async () => {
     updateProfileMock = vi.fn(async () => {
       throw new Error("500")