feat(login): 登录页改为微信一键登录并移除账密表单

src/pages/login/index.module.scss

@@ -42,7 +42,7 @@
   color: rgba(255, 255, 255, 0.85);
 }
 
-// 表单卡上浮叠在渐变区上
+// 登录卡上浮叠在渐变区上
 .form {
   margin: -120px 24px 0;
   padding: 48px 32px;
@@ -53,15 +53,6 @@
   flex-direction: column;
 }
 
-.input {
-  height: 100px;
-  background: $color-bg-gray;
-  border-radius: $radius-md;
-  padding: 0 32px;
-  margin-bottom: 24px;
-  font-size: 30px;
-}
-
 .submit {
   height: 96px;
   background: $color-primary-grad;

src/pages/login/index.tsx

@@ -1,8 +1,9 @@
 import { useState } from 'react'
-import { View, Text, Input } from '@tarojs/components'
-import { useAppDispatch } from '@/store/hooks'
+import { View, Text } from '@tarojs/components'
+import { useDidShow } from '@tarojs/taro'
+import { useAppDispatch, useAppSelector } from '@/store/hooks'
 import { setAuth } from '@/store/authSlice'
-import { login } from '@/api/auth'
+import { performWxLogin } from './wxLoginFlow'
 import { useToast } from '@/hooks/useToast'
 import { ROUTES } from '@/constants/routes'
 import { reLaunch } from '@/utils/navigation'
@@ -11,26 +12,28 @@ import styles from './index.module.scss'
 export default function Login() {
   const dispatch = useAppDispatch()
   const toast = useToast()
-  const [username, setUsername] = useState('')
-  const [password, setPassword] = useState('')
+  const token = useAppSelector((s) => s.auth.token)
   const [loading, setLoading] = useState(false)
 
-  const handleLogin = async () => {
-    if (!username || !password) {
-      toast.error('请填写完整')
-      return
-    }
+  // 已有 token 直接进首页（本期不做 checkLogin 校验，spec D5）
+  useDidShow(() => {
+    if (token && !loading) reLaunch(ROUTES.HOME)
+  })
+
+  const handleWxLogin = async () => {
+    if (loading) return
     setLoading(true)
     try {
-      const res = await login({ username, password })
-      dispatch(setAuth(res))
+      const { code, userInfo } = await performWxLogin()
+      dispatch(setAuth({ token: code, userInfo }))
       reLaunch(ROUTES.HOME)
-    } catch {
-      toast.error('登录失败')
-    } finally {
+    } catch (e) {
+      // code 失效/已用等场景：toast 后端 Message，用户重按按钮重新 Taro.login（code 一次性，重试安全）
+      toast.error(e instanceof Error && e.message ? e.message : '登录失败')
       setLoading(false)
     }
   }
+
   return (
     <View className={styles.page}>
       <View className={styles.hero}>
@@ -41,21 +44,8 @@ export default function Login() {
         <Text className={styles.slogan}>一起守护家人</Text>
       </View>
       <View className={styles.form}>
-        <Input
-          className={styles.input}
-          placeholder="账号"
-          value={username}
-          onInput={(e) => setUsername(e.detail.value)}
-        />
-        <Input
-          className={styles.input}
-          placeholder="密码"
-          password
-          value={password}
-          onInput={(e) => setPassword(e.detail.value)}
-        />
-        <View className={styles.submit} onClick={handleLogin}>
-          <Text className={styles.submitText}>{loading ? '登录中...' : '登录'}</Text>
+        <View className={styles.submit} onClick={handleWxLogin}>
+          <Text className={styles.submitText}>{loading ? '登录中...' : '微信一键登录'}</Text>
         </View>
       </View>
     </View>

src/pages/login/wxLoginFlow.ts

@@ -15,7 +15,14 @@ function resolveAppId(): string {
 // 微信一键登录主流程（spec D3）：
 // Taro.login 换一次性 code → 组装 appId/openId → 调 miniapp/login → 缓存响应中的 openId
 export async function performWxLogin(): Promise<WxLoginResult> {
-  const { code } = await Taro.login()
+  // Taro.login reject 时返回 { errMsg } 形状对象而非 Error，此处归一化为带 message 的 Error
+  let code: string
+  try {
+    const r = await Taro.login()
+    code = r.code
+  } catch (e) {
+    throw new Error(e instanceof Error ? e.message : '微信登录失败')
+  }
   if (!code) throw new Error('获取微信登录凭证失败')
   const openId = storage.get<string>(WX_OPENID_STORAGE_KEY) ?? undefined
   const result = await wxMiniappLogin({ appId: resolveAppId(), code, openId })

tests/unit/login/wxLoginFlow.spec.ts

@@ -77,6 +77,12 @@ describe('performWxLogin', () => {
     expect(mockWxMiniappLogin).not.toHaveBeenCalled()
   })
 
+  it('Taro.login reject（errMsg 形状）时抛带 message 的 Error', async () => {
+    mockLogin.mockRejectedValue({ errMsg: 'login:fail:cancel' })
+    await expect(performWxLogin()).rejects.toThrow('微信登录失败')
+    expect(mockWxMiniappLogin).not.toHaveBeenCalled()
+  })
+
   it('getAccountInfoSync 抛错时回退常量 appId', async () => {
     mockGetAccountInfo.mockImplementation(() => { throw new Error('not supported') })
     mockWxMiniappLogin.mockResolvedValue(result())