code quality improvements and improved file error handling

src/context/SightingFeedContext.ts

@@ -12,6 +12,8 @@ type SightingFeedContextType = {
   setSelectedSighting: (sighting: SightingType | SightingType | null) => void;
   setSightingModalOpen: (isSightingModalOpen: boolean) => void;
   isSightingModalOpen: boolean;
+  isError: boolean;
+  isLoading: boolean;
 };
 
 export const SightingFeedContext = createContext<