Add episode progress bar to title cards for in-progress TV shows

Shows a subtle progress bar at the bottom of title cards indicating
watched/total episodes, with a tooltip for exact counts. Uses a single
efficient SQL query with JOINs to batch-fetch progress for all visible
titles on the Explore page.

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

lib/actions/watchlist.ts

@@ -7,6 +7,7 @@ import { db } from "@/lib/db/client";
 import { userTitleStatus } from "@/lib/db/schema";
 import { importTitle } from "@/lib/services/metadata";
 import {
+  getEpisodeProgressByTmdbIds,
   getUserStatusesByTmdbIds,
   setTitleStatus,
 } from "@/lib/services/tracking";
@@ -19,6 +20,14 @@ export async function fetchUserStatuses(
   return getUserStatusesByTmdbIds(session.user.id, tmdbIds);
 }
 
+export async function fetchEpisodeProgress(
+  tmdbIds: { tmdbId: number; type: string }[],
+): Promise<Record<string, { watched: number; total: number }>> {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) return {};
+  return getEpisodeProgressByTmdbIds(session.user.id, tmdbIds);
+}
+
 export async function quickAddToWatchlist(
   tmdbId: number,
   type: "movie" | "tv",