新增游客查询默认的方法；

api/home/mySelections.js

@@ -140,6 +140,36 @@ class MySelectionsAPI {
             throw error
         }
     }
+
+    /**
+     * 游客查询默认自选股
+     * @param {Function} successCallback - 成功回调函数
+     * @param {Function} failCallback - 失败回调函数
+     * @returns {Promise}
+     */
+    static async getDefaultStocks(successCallback, failCallback = null) {
+        const url = '/api/homePage/userStock/getDefaultStocks'
+        
+        try {
+            const response = await http({
+                url: url,
+                method: 'POST',
+                data: {}
+            })
+            
+            console.log('游客查询默认自选股 - 响应:', response)
+            if (successCallback && typeof successCallback === 'function') {
+                successCallback(response)
+            }
+            return response
+        } catch (error) {
+            console.error('游客查询默认自选股 - 失败:', error)
+            if (failCallback && typeof failCallback === 'function') {
+                failCallback(error)
+            }
+            throw error
+        }
+    }
 }
 
 // 导出API类
@@ -150,5 +180,6 @@ export const {
     checkExist,
     getUserStockGroupList,
     getUserStockList,
-    getUserOrDefault
+    getUserOrDefault,
+    getDefaultStocks
 } = MySelectionsAPI