fix some other bugs of iam

apps/user-app/src/views/user/IamCallback.vue

@@ -7,13 +7,20 @@ import { useSessionStore } from '../../stores/session'
 const router = useRouter()
 const session = useSessionStore()
 
+function backToCaller() {
+  sessionStorage.setItem('gb_iam_sso_skip', '1')
+  const saved = sessionStorage.getItem('gb_iam_return')
+  sessionStorage.removeItem('gb_iam_return')
+  const path = saved && saved.startsWith('/') && !saved.startsWith('//') ? saved : '/'
+  return router.replace(path)
+}
+
 onMounted(async () => {
   const params = new URLSearchParams(window.location.search)
   sessionStorage.removeItem('gb_iam_sso_checked')
 
   if (params.get('error') || !params.get('code') || !params.get('state')) {
-    sessionStorage.setItem('gb_iam_sso_skip', '1')
-    await router.replace({ name: 'login' })
+    await backToCaller()
     return
   }
 
@@ -28,8 +35,7 @@ onMounted(async () => {
     }
     await router.replace({ name: 'home' })
   } catch {
-    sessionStorage.setItem('gb_iam_sso_skip', '1')
-    await router.replace({ name: 'login' })
+    await backToCaller()
   }
 })
 </script>