feat(user): 添加关于页隐藏开发者登录功能

- 在底部版权信息连续点击11次时弹出开发者登录弹窗
- 登录方式采用手机号加短信验证码，复用现有登录API
- 点击计数器使用useRef实现，3秒无操作自动重置
- 第4次及以后点击显示剩余步数提示，前3次触发轻震动反馈
- 登录成功后同步React登录态，关闭弹窗并重置表单
- 弹窗中使用NutUI组件，实现验证码发送和倒计时功能

src/utils/privacy.ts

@@ -0,0 +1,79 @@
+import Taro from '@tarojs/taro'
+
+/**
+ * 在调用隐私相关 API / 组件前，确保用户已完成微信隐私协议授权。
+ * 基础库 3.16.1+ 强制要求，未授权会抛 errno:112 / buttonId is wrong 等错误。
+ * 旧基础库或不支持隐私协议的版本直接放行。
+ */
+export const ensurePrivacyAuthorized = (): Promise<void> => {
+  return new Promise((resolve) => {
+    const wxAny: any = Taro
+    if (typeof wxAny.requirePrivacyAuthorize !== 'function') {
+      resolve()
+      return
+    }
+    if (typeof wxAny.getPrivacySetting === 'function') {
+      wxAny.getPrivacySetting({
+        success: (res: any) => {
+          if (res && res.needAuthorization) {
+            wxAny.requirePrivacyAuthorize({
+              success: () => resolve(),
+              fail: () => resolve(),
+            })
+          } else {
+            resolve()
+          }
+        },
+        fail: () => resolve(),
+      })
+    } else {
+      wxAny.requirePrivacyAuthorize({
+        success: () => resolve(),
+        fail: () => resolve(),
+      })
+    }
+  })
+}
+
+/**
+ * 打开官方隐私协议页面（半屏协议）。
+ * 返回是否成功打开。
+ */
+export const openPrivacyContract = (): Promise<boolean> => {
+  return new Promise((resolve) => {
+    const wxAny: any = Taro
+    if (typeof wxAny.openPrivacyContract !== 'function') {
+      resolve(false)
+      return
+    }
+    wxAny.openPrivacyContract({
+      success: () => resolve(true),
+      fail: () => resolve(false),
+    })
+  })
+}
+
+/**
+ * 检查当前用户是否需要同意隐私协议。
+ */
+export const checkPrivacyAuthorization = (): Promise<{
+  needAuthorization: boolean
+  isAuthorization: boolean
+}> => {
+  return new Promise((resolve) => {
+    const wxAny: any = Taro
+    if (typeof wxAny.getPrivacySetting !== 'function') {
+      resolve({ needAuthorization: false, isAuthorization: true })
+      return
+    }
+    wxAny.getPrivacySetting({
+      success: (res: any) => {
+        resolve({
+          needAuthorization: !!res?.needAuthorization,
+          isAuthorization: !!res?.isAuthorization,
+        })
+      },
+      fail: () => resolve({ needAuthorization: false, isAuthorization: true }),
+    })
+  })
+}