feat: implement find_all method in ChannelRepository and update related services and routes for public access

k-tv-frontend/hooks/use-channels.ts

@@ -9,8 +9,8 @@ export function useChannels() {
   const { token } = useAuthContext();
   return useQuery({
     queryKey: ["channels"],
-    queryFn: () => api.channels.list(token!),
-    enabled: !!token,
+    // Public endpoint — no token needed for TV viewing
+    queryFn: () => api.channels.list(token ?? ""),
   });
 }
 
@@ -85,8 +85,8 @@ export function useCurrentBroadcast(channelId: string) {
   const { token } = useAuthContext();
   return useQuery({
     queryKey: ["broadcast", channelId],
-    queryFn: () => api.schedule.getCurrentBroadcast(channelId, token!),
-    enabled: !!token && !!channelId,
+    queryFn: () => api.schedule.getCurrentBroadcast(channelId, token ?? ""),
+    enabled: !!channelId,
     refetchInterval: 30_000,
     retry: false,
   });
@@ -96,7 +96,7 @@ export function useEpg(channelId: string, from?: string, until?: string) {
   const { token } = useAuthContext();
   return useQuery({
     queryKey: ["epg", channelId, from, until],
-    queryFn: () => api.schedule.getEpg(channelId, token!, from, until),
-    enabled: !!token && !!channelId,
+    queryFn: () => api.schedule.getEpg(channelId, token ?? "", from, until),
+    enabled: !!channelId,
   });
 }