feat: add kefintweaks watchlist integration properly

components/tv/TVWatchlistButton.tsx

@@ -0,0 +1,36 @@
+import { Ionicons } from "@expo/vector-icons";
+import type { BaseItemDto } from "@jellyfin/sdk/lib/generated-client";
+import React from "react";
+import { useWatchlist } from "@/hooks/useWatchlist";
+import { TVButton } from "./TVButton";
+
+export interface TVWatchlistButtonProps {
+  item: BaseItemDto;
+  disabled?: boolean;
+}
+
+/**
+ * KefinTweaks watchlist toggle (Likes-backed) for TV detail pages.
+ * Render only when settings.useKefinTweaks is enabled.
+ */
+export const TVWatchlistButton: React.FC<TVWatchlistButtonProps> = ({
+  item,
+  disabled,
+}) => {
+  const { isWatchlisted, toggleWatchlist } = useWatchlist(item);
+
+  return (
+    <TVButton
+      onPress={toggleWatchlist}
+      variant='glass'
+      square
+      disabled={disabled}
+    >
+      <Ionicons
+        name={isWatchlisted ? "bookmark" : "bookmark-outline"}
+        size={28}
+        color='#FFFFFF'
+      />
+    </TVButton>
+  );
+};

components/tv/index.ts

@@ -68,3 +68,5 @@ export { TVTrackCard } from "./TVTrackCard";
 // User switching
 export type { TVUserCardProps } from "./TVUserCard";
 export { TVUserCard } from "./TVUserCard";
+export type { TVWatchlistButtonProps } from "./TVWatchlistButton";
+export { TVWatchlistButton } from "./TVWatchlistButton";