fix: handle empty org_id gracefully in course-package-store + index.vue

- CoursePackageStore: don't show error when no orgId and unauth,
  just show empty state
- index.vue: only render CoursePackageStore when org_id is available
  in URL, otherwise show original login prompt

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

src/components/course-package-store.vue

@@ -87,14 +87,15 @@ export default defineComponent({
     const loadPackages = async () => {
       state.loading = true;
       state.error = false;
-      let ok: boolean;
       const orgId = resolvedOrgId.value;
       if (orgId) {
-        ok = await queryPublicPackages(orgId);
-      } else {
-        ok = isLoggedIn() ? await queryOrgPackages() : false;
+        const ok = await queryPublicPackages(orgId);
+        state.error = !ok;
+      } else if (isLoggedIn()) {
+        const ok = await queryOrgPackages();
+        state.error = !ok;
       }
-      state.error = !ok;
+      // No orgId and unauth: show empty state, not error
       state.loading = false;
       state.loaded = true;
     };

src/pages/index.vue

@@ -18,7 +18,8 @@
       </template>
       <van-empty v-else description="账号未启用或未通过注册审核" />
     </template>
-    <course-package-store v-if="!has_login" />
+    <course-package-store v-if="!has_login && urlOrgId" />
+    <van-empty v-if="!has_login && !urlOrgId" description="请返回微信小程序完成登录" />
   </div>
 </template>
 
@@ -127,6 +128,10 @@ export default defineComponent({
       { value: HtyBaseRoles.TEACHER, label: "老师" },
     ];
     const has_login = computed(() => !!store.current.hty_id);
+    const urlOrgId = computed(() => {
+      const params = new URLSearchParams(window.location.search);
+      return params.get('org_id') || '';
+    });
     const is_registered = computed(() => store.current.is_registered);
     const is_enabled = computed(() => store.current.enabled);
     const authorized = computed(() => userStatus === UserStates.Authorized);
@@ -189,7 +194,7 @@ export default defineComponent({
     return {
       is_registered, is_enabled, is_student, has_teacher,
       has_login, authorized, activeRoles, chooseRole, setRole, store,
-      initial_roles, scene
+      initial_roles, scene, urlOrgId
     }
   },
 });