Implement video feed feature with components, hooks, and utility functions

src/features/dashboard/hooks/useSightingList.ts

@@ -7,6 +7,7 @@ export const useSightingList = () => {
   const { videoFeedQuery } = useVideoFeed();
   const latestSighting = videoFeedQuery?.data;
   const lastProcessedRef = useRef<number>(-1);
+  const isLoading = videoFeedQuery?.isPending;
 
   useEffect(() => {
     if (!latestSighting || latestSighting.ref === undefined || latestSighting.ref === -1) return;
@@ -22,5 +23,5 @@ export const useSightingList = () => {
       });
     }
   }, [latestSighting, latestSighting?.ref]);
-  return { sightingList };
+  return { sightingList, isLoading };
 };