feat(nav-category): support dynamic home grid categories in admin and uniapp

pwuniapp/common/api.js

@@ -564,6 +564,21 @@ export async function getBanners() {
   return null;
 }
 
+/**
+ * 获取首页金刚区活动品类导航列表 (配置化接口)
+ */
+export async function getNavCategories() {
+  try {
+    const res = await http.get('/nav-categories');
+    if (Array.isArray(res) && res.length > 0) {
+      return res;
+    }
+  } catch (err) {
+    console.warn('[API] 获取金刚区品类导航异常:', err.message);
+  }
+  return null;
+}
+