router guard: wrap in try/catch, add single-department auto-selection

- Wrap entire beforeEach guard in try/catch to prevent crashes from
  breaking navigation and leaving a blank page
- Add missing next() at end of try block so all code paths resolve
- Integrate switchDepartment() after loadMyDepartments() when exactly
  1 department is available, enabling transparent single-dept flow

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/main.ts

@@ -70,9 +70,10 @@ const parseCurrentOrgIdFromToken = (token: string | null): string | undefined =>
 };
 
 router.beforeEach(async (to, from , next) => {
+    try {
     document.title = to.meta.title as string;
     let { store, read, login, logout, chooseRole, getUnreadTongzhis, set_editing } = useUser();
-    let { store: orgStore, loadMyOrgs, switchOrg, loadMyDepartments } = useOrg();
+    let { store: orgStore, loadMyOrgs, switchOrg, loadMyDepartments, switchDepartment } = useOrg();
     set_editing(false)
     store.unionid = (store.unionid || cookie.get(HtyUnionIDToken) || '').toString();
     if (!store.current.hty_id) {
@@ -173,8 +174,10 @@ router.beforeEach(async (to, from , next) => {
                 if (currentAuthToken) {
                     window.localStorage.setItem(HtySudoToken, currentAuthToken);
                 }
-                // load departments after org switch (single-department transparent)
                 await loadMyDepartments();
+                if (orgStore.departments.length === 1 && orgStore.currentDepartmentId) {
+                    await switchDepartment(orgStore.currentDepartmentId);
+                }
             } else if (organizations.length > 1) {
                 await router.replace('/org/select');
                 next();
@@ -184,9 +187,11 @@ router.beforeEach(async (to, from , next) => {
             window.localStorage.setItem(CurrentOrgId, tokenOrgId);
             orgStore.currentOrgId = tokenOrgId;
         }
-        // load departments if not already loaded (after org context is established)
         if (orgStore.currentOrgId && orgStore.departments.length === 0) {
             await loadMyDepartments();
+            if (orgStore.departments.length === 1 && orgStore.currentDepartmentId) {
+                await switchDepartment(orgStore.currentDepartmentId);
+            }
         }
     }
 
@@ -197,7 +202,10 @@ router.beforeEach(async (to, from , next) => {
     }
 
     next();
+    } catch (e: any) {
+        window.localStorage.setItem('__guardError', e?.message || String(e));
+        next();
+    }
 })
 
 createApp(App).use(router).use(weixin).mount('#app')
-