Polish mobile layouts, extract ExpandableText, fix image sizing

- Stack title-hero poster/metadata vertically on mobile (flex-col md:flex-row),
  switch backdrop tall breakpoint from sm to md
- Extract bio expand/collapse logic into reusable ExpandableText component;
  use it in PersonHero and TitleHero
- Fix ContinueWatchingCard image to use fill + sizes instead of fixed
  width/height to avoid layout shift
- Add fade-out gradient on genre chip scrollbar edge on mobile
- Show scaled-down ambient glow on mobile instead of hiding it entirely
- Humanize knownForDepartment labels (Acting→Actor, Directing→Director, etc.)
- Change cast member name from truncate to line-clamp-2 for wrapping
- Hide tooltip arrow via [&>:last-child]:hidden instead of color-matching it
- Apply safe-area-inset padding to HeroBanner content on notched devices

components/ui/input.tsx

@@ -9,7 +9,7 @@ function Input({ className, type, ...props }: React.ComponentProps<"input">) {
       type={type}
       data-slot="input"
       className={cn(
-        "bg-input/20 dark:bg-input/30 border-input focus-visible:border-ring focus-visible:ring-ring/30 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:aria-invalid:border-destructive/50 file:text-foreground placeholder:text-muted-foreground h-7 w-full min-w-0 rounded-md border px-2 py-0.5 text-sm transition-colors outline-none file:inline-flex file:h-6 file:border-0 file:bg-transparent file:text-xs/relaxed file:font-medium focus-visible:ring-2 disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50 aria-invalid:ring-2 md:text-xs/relaxed",
+        "h-7 w-full min-w-0 rounded-md border border-input bg-input/20 px-2 py-0.5 text-sm outline-none transition-colors file:inline-flex file:h-6 file:border-0 file:bg-transparent file:font-medium file:text-foreground file:text-xs/relaxed placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-2 focus-visible:ring-ring/30 disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-2 aria-invalid:ring-destructive/20 md:text-xs/relaxed dark:bg-input/30 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40",
         className,
       )}
       {...props}