diff --git a/backend/community/serializers.py b/backend/community/serializers.py
index d510ca0..647f34c 100644
--- a/backend/community/serializers.py
+++ b/backend/community/serializers.py
@@ -6,7 +6,7 @@ from .utils import get_current_wechat_user
 class ActivitySerializer(serializers.ModelSerializer):
     display_banner_url = serializers.ReadOnlyField()
     signup_form_config = serializers.SerializerMethodField()
-    current_signups = serializers.ReadOnlyField()
+    current_signups = serializers.IntegerField(read_only=True)
     has_signed_up = serializers.SerializerMethodField()
     
     class Meta:
diff --git a/backend/shop/migrations/0028_fix_goodsid_schema.py b/backend/shop/migrations/0028_fix_goodsid_schema.py
new file mode 100644
index 0000000..7e7fc16
--- /dev/null
+++ b/backend/shop/migrations/0028_fix_goodsid_schema.py
@@ -0,0 +1,23 @@
+# Generated by Django 6.0.1 on 2026-02-12 14:26
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shop', '0027_wechatuser_is_star_wechatuser_title'),
+    ]
+
+    operations = [
+        # 1. 迁移旧数据：将 goodsid_id 的值复制到 config_id
+        migrations.RunSQL(
+            sql="UPDATE shop_order SET config_id = goodsid_id WHERE config_id IS NULL AND goodsid_id IS NOT NULL;",
+            reverse_sql="UPDATE shop_order SET goodsid_id = config_id WHERE goodsid_id IS NULL AND config_id IS NOT NULL;"
+        ),
+        # 2. 解除 goodsid_id 的非空限制，允许其为空（因为新代码不再写入此字段）
+        migrations.RunSQL(
+            sql="ALTER TABLE shop_order ALTER COLUMN goodsid_id DROP NOT NULL;",
+            reverse_sql="ALTER TABLE shop_order ALTER COLUMN goodsid_id SET NOT NULL;"
+        ),
+    ]
diff --git a/frontend/src/components/CreateTopicModal.jsx b/frontend/src/components/CreateTopicModal.jsx
index 143688e..6ffd63f 100644
--- a/frontend/src/components/CreateTopicModal.jsx
+++ b/frontend/src/components/CreateTopicModal.jsx
@@ -173,7 +173,7 @@ const CreateTopicModal = ({ visible, onClose, onSuccess, initialValues, isEditMo
       open={visible}
       onCancel={onClose}
       footer={null}
-      destroyOnClose
+      destroyOnHidden
       width={1000}
       centered
       maskClosable={false}
diff --git a/frontend/src/components/LoginModal.jsx b/frontend/src/components/LoginModal.jsx
index 49ee9cf..057f99c 100644
--- a/frontend/src/components/LoginModal.jsx
+++ b/frontend/src/components/LoginModal.jsx
@@ -64,7 +64,7 @@ const LoginModal = ({ visible, onClose, onLoginSuccess }) => {
       open={visible}
       onCancel={onClose}
       footer={null}
-      destroyOnClose
+      destroyOnHidden
       centered
     >
       <Form
diff --git a/frontend/src/pages/AIServices.jsx b/frontend/src/pages/AIServices.jsx
index 0d19caf..f466b40 100644
--- a/frontend/src/pages/AIServices.jsx
+++ b/frontend/src/pages/AIServices.jsx
@@ -36,7 +36,8 @@ const AIServices = () => {
   if (loading) {
       return (
           <div style={{ textAlign: 'center', padding: '100px 0' }}>
-              <Spin size="large" tip="Loading services..." />
+              <Spin size="large" />
+              <div style={{ marginTop: 20 }}>Loading services...</div>
           </div>
       );
   }
diff --git a/frontend/src/pages/Payment.jsx b/frontend/src/pages/Payment.jsx
index ffcff0e..1286aaa 100644
--- a/frontend/src/pages/Payment.jsx
+++ b/frontend/src/pages/Payment.jsx
@@ -111,7 +111,7 @@ const Payment = () => {
     }
   };
 
-  if (loading) return <div style={{ padding: 50, textAlign: 'center' }}><Spin size="large" tip="正在加载订单信息..." /></div>;
+  if (loading) return <div style={{ padding: 50, textAlign: 'center' }}><Spin size="large" /><div style={{ marginTop: 20 }}>正在加载订单信息...</div></div>;
 
   if (paySuccess) {
     return (
@@ -180,8 +180,9 @@ const Payment = () => {
                 <p style={{ color: '#666', fontSize: 14 }}>支付完成后将自动跳转</p>
               </>
             ) : (
-             <div style={{ padding: '40px 0' }}>
-               <Spin tip="正在生成支付二维码..." />
+             <div style={{ padding: '40px 0', textAlign: 'center' }}>
+               <Spin />
+               <div style={{ marginTop: 10 }}>正在生成支付二维码...</div>
              </div>
            )}
         </div>
diff --git a/frontend/src/pages/ServiceDetail.jsx b/frontend/src/pages/ServiceDetail.jsx
index f3a8e19..567ff27 100644
--- a/frontend/src/pages/ServiceDetail.jsx
+++ b/frontend/src/pages/ServiceDetail.jsx
@@ -64,7 +64,8 @@ const ServiceDetail = () => {
   if (loading) {
     return (
         <div style={{ textAlign: 'center', padding: '100px 0' }}>
-            <Spin size="large" tip="Loading..." />
+            <Spin size="large" />
+            <div style={{ marginTop: 20 }}>Loading...</div>
         </div>
     );
   }
diff --git a/frontend/src/pages/VCCourseDetail.jsx b/frontend/src/pages/VCCourseDetail.jsx
index 95b366b..da3d945 100644
--- a/frontend/src/pages/VCCourseDetail.jsx
+++ b/frontend/src/pages/VCCourseDetail.jsx
@@ -61,7 +61,8 @@ const VCCourseDetail = () => {
   if (loading) {
     return (
         <div style={{ textAlign: 'center', padding: '100px 0' }}>
-            <Spin size="large" tip="Loading..." />
+            <Spin size="large" />
+            <div style={{ marginTop: 20 }}>Loading...</div>
         </div>
     );
   }