fix(mobile): distinguish auth failure from HR mismatch on position sync page

问题:登录态失效(token 冻结/无效,后端返 401)时,同步岗位页把认证错误
误显示成「人力系统中未匹配到当前手机号的在职岗位,请联系 HR」,员工被
困在该页无路可退。

修复:
- api.ts: 新增 ApiError(statusCode/bizCode) 类型化错误与 isAuthApiError,
  readPayload/parsePayloadText/XHR 路径统一抛出带状态码的错误,消息不变
- position.ts: fetchOrgPositionResult 返回四态判别结果
  matched/unmatched/unauthorized/error;hydratePositionFromOrg 行为不变
- position/index.vue: 按四态分支处理——
  · unauthorized -> 清除登录态并自动回登录页(保留 redirect)
  · error -> 提示「网络异常…请重试」,保留重试按钮
  · unmatched -> 才显示联系 HR 文案
  并新增「退出重新登录」链接(确认弹窗后清登录态回登录页),
  避免任何异常场景下用户被困无退出路径

验证(构建产物 + 生产 API,Playwright 五场景全过,截图见
.data/visual-audit-20260718/position-fix/):
S1 固定码真实登录->今日页(保洁岗匹配) S2 无效token->自动回登录
S3 断网->网络异常提示留在本页 S4 有效token->自动通过
S5 退出链接->确认->回登录且登录态已清

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

mobile-uni/src/pages/auth/position/index.vue

@@ -27,6 +27,10 @@
     <button class="confirm-button" :disabled="saving" @click="autoFillFromOrg">
       {{ saving ? '同步中…' : '重新同步岗位' }}
     </button>
+
+    <view class="logout-row">
+      <text class="logout-link" @click="logoutAndRelogin">退出重新登录</text>
+    </view>
   </view>
 </template>
 
@@ -34,12 +38,13 @@
 import { computed, ref } from 'vue';
 import { onLoad, onShow } from '@dcloudio/uni-app';
 import {
+  clearAuth,
   getAuth,
   isLoggedIn,
   rememberLoginRedirect,
   type UserPosition
 } from '@/services/auth';
-import { goToMobileTarget, hydratePositionFromOrg } from '@/services/position';
+import { fetchOrgPositionResult, goToMobileTarget } from '@/services/position';
 import { resetPageScroll } from '@/services/navigation';
 
 const redirect = ref('/pages/user/today/index');
@@ -52,22 +57,49 @@ const finish = () => {
   goToMobileTarget(redirect.value || '/pages/user/today/index');
 };
 
+const goLogin = () => {
+  rememberLoginRedirect(redirect.value);
+  uni.redirectTo({ url: '/pages/auth/login/index' });
+};
+
+const logoutAndRelogin = () => {
+  uni.showModal({
+    title: '退出重新登录',
+    content: '将清除当前登录状态并返回登录页，确认退出？',
+    confirmText: '退出',
+    cancelText: '再想想',
+    success: (res) => {
+      if (!res.confirm) return;
+      clearAuth();
+      goLogin();
+    }
+  });
+};
+
 const autoFillFromOrg = async () => {
   if (saving.value) return;
   if (!isLoggedIn()) {
-    rememberLoginRedirect(redirect.value);
-    uni.redirectTo({ url: '/pages/auth/login/index' });
+    goLogin();
     return;
   }
   saving.value = true;
   message.value = '';
   try {
-    const officialPosition = await hydratePositionFromOrg();
-    if (officialPosition) {
-      selectedPosition.value = officialPosition;
+    const result = await fetchOrgPositionResult();
+    if (result.status === 'matched') {
+      selectedPosition.value = result.position;
       finish();
       return;
     }
+    if (result.status === 'unauthorized') {
+      clearAuth();
+      goLogin();
+      return;
+    }
+    if (result.status === 'error') {
+      message.value = '网络异常，暂时没有同步到岗位。请检查网络后点击「重新同步岗位」重试。';
+      return;
+    }
     message.value = '人力系统中未匹配到当前手机号的在职岗位，请联系 HR 核对手机号、在职状态和岗位信息。';
   } finally {
     saving.value = false;
@@ -208,4 +240,16 @@ onShow(() => {
 .confirm-button[disabled] {
   opacity: 0.45;
 }
+
+.logout-row {
+  margin-top: 22px;
+  text-align: center;
+}
+
+.logout-link {
+  color: #8a93a0;
+  font-size: 15px;
+  text-decoration: underline;
+  padding: 10px 14px;
+}
 </style>