fix(api): handle varying API response formats in channels data retrieval

Add defensive check to handle both direct array responses and nested list format from API, ensuring consistent channel data display regardless of response structure.

src/pages/Channels.tsx

@@ -55,8 +55,8 @@ export default function Channels() {
     setLoading(true)
     try {
       const response = await channelsApi.getChannels()
-      const list = response.data.data
-      // 按 sort_order 排序
+      const data = response.data.data
+      const list = Array.isArray(data) ? data : (data?.list || [])
       list.sort((a: Channel, b: Channel) => a.sort_order - b.sort_order)
       setChannels(list)
     } catch (error) {