Optimize frontend: memoization, modern React hooks, reduced render overhead

- useTimeAgo: replace per-instance intervals with shared useSyncExternalStore ticker
- useTiltEffect: gate to fine-pointer devices, skip motion graphs on touch
- Carousel: bake WheelGesturesPlugin into primitive, remove from all consumers
- TitleSeasons: use memoized Set + precomputed progress map instead of Array.includes
- useSearch: stabilize results identity with useMemo
- CommandPalette: hoist shortcut grouping to module scope, stabilize effect deps
- StarRating: hoist static spring transition to module constant
- Settings toggles: use useOptimistic + useTransition for auto-rollback

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/(pages)/dashboard/_components/continue-watching-list.tsx

@@ -1,6 +1,5 @@
 "use client";
 
-import { WheelGesturesPlugin } from "embla-carousel-wheel-gestures";
 import {
   Carousel,
   CarouselContent,
@@ -19,7 +18,6 @@ export function ContinueWatchingList({
   return (
     <Carousel
       opts={{ align: "start", dragFree: true, containScroll: "trimSnaps" }}
-      plugins={[WheelGesturesPlugin({ forceWheelAxis: "x" })]}
       className="-mx-4 sm:-mx-0"
     >
       <CarouselContent className="px-4 sm:px-0">