fix(admin): 修复注册设置PUT接口——由独立query参数改为接收JSON body

根因：PUT /admin/users/register-settings 参数定义为 phone_required: bool = None 等独立query参数，
但前端发送的是 JSON body {"phone_required":true,"email_required":true}。
FastAPI无法把JSON body映射到独立参数 → 全部收到None → 循环跳过 → DB无更新(提示成功但无效)。
修复：参数改为 body: dict 统一接收JSON，用 body.get() 取值更新 RegisterSetting 表。

backend/python/app/api/admin/users.py

@@ -121,57 +121,48 @@ async def get_register_settings(
 
 @router.put("/register-settings")
 async def update_register_settings(
-    phone_required: bool = None,
-    phone_sms_required: bool = None,
-    email_required: bool = None,
-    email_verify_required: bool = None,
-    real_name_required: bool = None,
-    aliyun_access_key: str = None,
-    aliyun_secret_key: str = None,
-    aliyun_endpoint: str = None,
-    sms_sign_name: str = None,
-    sms_template_code: str = None,
+    body: dict,
     admin_user=Depends(get_current_admin),
     db: Session = Depends(get_db),
 ):
-    """更新注册设置"""
+    """更新注册设置（接收 JSON Body）"""
     setting = db.query(RegisterSetting).first()
     if not setting:
         setting = RegisterSetting(
             id=str(uuid.uuid4()),
-            phone_required=phone_required if phone_required is not None else True,
-            phone_sms_required=phone_sms_required if phone_sms_required is not None else True,
-            email_required=email_required if email_required is not None else True,
-            email_verify_required=email_verify_required if email_verify_required is not None else True,
-            real_name_required=real_name_required or False,
-            aliyun_access_key=aliyun_access_key,
-            aliyun_secret_key=aliyun_secret_key,
-            aliyun_endpoint=aliyun_endpoint,
-            sms_sign_name=sms_sign_name,
-            sms_template_code=sms_template_code,
+            phone_required=body.get("phone_required", True),
+            phone_sms_required=body.get("phone_sms_required", True),
+            email_required=body.get("email_required", True),
+            email_verify_required=body.get("email_verify_required", True),
+            real_name_required=body.get("real_name_required", False),
+            aliyun_access_key=body.get("aliyun_access_key"),
+            aliyun_secret_key=body.get("aliyun_secret_key"),
+            aliyun_endpoint=body.get("aliyun_endpoint"),
+            sms_sign_name=body.get("sms_sign_name"),
+            sms_template_code=body.get("sms_template_code"),
         )
         db.add(setting)
     else:
-        if phone_required is not None:
-            setting.phone_required = phone_required
-        if phone_sms_required is not None:
-            setting.phone_sms_required = phone_sms_required
-        if email_required is not None:
-            setting.email_required = email_required
-        if email_verify_required is not None:
-            setting.email_verify_required = email_verify_required
-        if real_name_required is not None:
-            setting.real_name_required = real_name_required
-        if aliyun_access_key is not None:
-            setting.aliyun_access_key = aliyun_access_key
-        if aliyun_secret_key is not None:
-            setting.aliyun_secret_key = aliyun_secret_key
-        if aliyun_endpoint is not None:
-            setting.aliyun_endpoint = aliyun_endpoint
-        if sms_sign_name is not None:
-            setting.sms_sign_name = sms_sign_name
-        if sms_template_code is not None:
-            setting.sms_template_code = sms_template_code
+        if "phone_required" in body:
+            setting.phone_required = body["phone_required"]
+        if "phone_sms_required" in body:
+            setting.phone_sms_required = body["phone_sms_required"]
+        if "email_required" in body:
+            setting.email_required = body["email_required"]
+        if "email_verify_required" in body:
+            setting.email_verify_required = body["email_verify_required"]
+        if "real_name_required" in body:
+            setting.real_name_required = body["real_name_required"]
+        if "aliyun_access_key" in body:
+            setting.aliyun_access_key = body["aliyun_access_key"]
+        if "aliyun_secret_key" in body:
+            setting.aliyun_secret_key = body["aliyun_secret_key"]
+        if "aliyun_endpoint" in body:
+            setting.aliyun_endpoint = body["aliyun_endpoint"]
+        if "sms_sign_name" in body:
+            setting.sms_sign_name = body["sms_sign_name"]
+        if "sms_template_code" in body:
+            setting.sms_template_code = body["sms_template_code"]
         setting.updated_at = datetime.now()
 
     db.commit()