refactor(ui): improve layout and accessibility in various components

- Updated the grid layout in the Home page for better responsiveness.
- Adjusted tabIndex handling in MultiSelect component to enhance accessibility.
- Added minimum width to the TopChannels table for consistent display.
- Refined notification recipient placeholder logic for cleaner code.

src/app/(home)/page.tsx

@@ -51,7 +51,7 @@ export default async function Home({ searchParams }: PropsType) {
 
         <RegionLabels />
 
-        <div className="col-span-12 grid xl:col-span-8">
+        <div className="col-span-12 grid min-w-0 xl:col-span-8">
           <Suspense fallback={<TopChannelsSkeleton />}>
             <TopChannels />
           </Suspense>