refactor(types): add TypeScript type assertion for channel API response

Add explicit type casting to handle potential channel data response formats, improving type safety and IDE autocomplete for Channel data structures.

src/pages/Channels.tsx

@@ -55,7 +55,7 @@ export default function Channels() {
     setLoading(true)
     try {
       const response = await channelsApi.getChannels()
-      const data = response.data.data
+      const data = response.data.data as Channel[] | { list: Channel[] } | undefined
       const list = Array.isArray(data) ? data : (data?.list || [])
       list.sort((a: Channel, b: Channel) => a.sort_order - b.sort_order)
       setChannels(list)