Add TMDB image caching pipeline and resolve image URLs server-side

Introduce a local disk cache for TMDB images served through a proxy API
route (/api/images/[...path]), eliminating direct client-side CDN
dependencies. Images are cached by category (posters, backdrops, stills,
logos) and served with immutable cache headers.

Move all tmdbImageUrl() calls from client components to API routes and
server components so clients receive ready-to-use URLs. This removes the
need to expose TMDB_IMAGE_BASE_URL and IMAGE_CACHE_ENABLED via
next.config.ts env block. The landing page is split into a server
wrapper (app/page.tsx) and client component (components/landing-page.tsx).

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

lib/services/image-cache.ts

@@ -0,0 +1,209 @@
+import { existsSync, mkdirSync } from "node:fs";
+import { readFile, rename, writeFile } from "node:fs/promises";
+import path from "node:path";
+import { eq } from "drizzle-orm";
+import { db } from "@/lib/db/client";
+import { availabilityOffers, episodes, seasons, titles } from "@/lib/db/schema";
+
+export type ImageCategory = "posters" | "backdrops" | "stills" | "logos";
+
+const CATEGORY_SIZES: Record<ImageCategory, string> = {
+  posters: "w500",
+  backdrops: "w1280",
+  stills: "w1280",
+  logos: "w92",
+};
+
+const IMAGE_BASE_URL =
+  process.env.TMDB_IMAGE_BASE_URL || "https://image.tmdb.org/t/p";
+
+const CACHE_DIR = process.env.IMAGE_CACHE_DIR || "/data/images";
+
+export function imageCacheEnabled(): boolean {
+  return process.env.IMAGE_CACHE_ENABLED !== "false";
+}
+
+export function ensureImageDirs() {
+  for (const category of Object.keys(CATEGORY_SIZES)) {
+    const dir = path.join(CACHE_DIR, category);
+    if (!existsSync(dir)) {
+      mkdirSync(dir, { recursive: true });
+    }
+  }
+}
+
+export function isImageCached(
+  category: ImageCategory,
+  filename: string,
+): boolean {
+  return existsSync(getLocalImagePath(category, filename));
+}
+
+export function getLocalImagePath(
+  category: ImageCategory,
+  filename: string,
+): string {
+  return path.join(CACHE_DIR, category, path.basename(filename));
+}
+
+export async function readCachedImage(
+  category: ImageCategory,
+  filename: string,
+): Promise<Buffer | null> {
+  const filePath = getLocalImagePath(category, filename);
+  if (!existsSync(filePath)) return null;
+  return readFile(filePath);
+}
+
+export async function downloadAndCacheImage(
+  tmdbPath: string,
+  category: ImageCategory,
+): Promise<Buffer | null> {
+  const size = CATEGORY_SIZES[category];
+  const url = `${IMAGE_BASE_URL}/${size}${tmdbPath}`;
+
+  const res = await fetch(url);
+  if (!res.ok) return null;
+
+  const buffer = Buffer.from(await res.arrayBuffer());
+  const filename = path.basename(tmdbPath);
+  const finalPath = getLocalImagePath(category, filename);
+  const tmpPath = `${finalPath}.tmp.${Date.now()}`;
+
+  try {
+    await writeFile(tmpPath, buffer);
+    await rename(tmpPath, finalPath);
+  } catch {
+    // Best-effort cleanup
+  }
+
+  return buffer;
+}
+
+export async function fetchAndMaybeCache(
+  tmdbPath: string,
+  category: ImageCategory,
+): Promise<{ buffer: Buffer; contentType: string } | null> {
+  // Try local first
+  const filename = path.basename(tmdbPath);
+  const cached = await readCachedImage(category, filename);
+  if (cached) {
+    const ext = path.extname(filename).toLowerCase();
+    const contentType =
+      ext === ".png"
+        ? "image/png"
+        : ext === ".webp"
+          ? "image/webp"
+          : "image/jpeg";
+    return { buffer: cached, contentType };
+  }
+
+  // Fetch from TMDB
+  const size = CATEGORY_SIZES[category];
+  const url = `${IMAGE_BASE_URL}/${size}${tmdbPath}`;
+  const res = await fetch(url);
+  if (!res.ok) return null;
+
+  const buffer = Buffer.from(await res.arrayBuffer());
+  const contentType = res.headers.get("content-type") || "image/jpeg";
+
+  // Fire-and-forget save to disk
+  const finalPath = getLocalImagePath(category, filename);
+  const tmpPath = `${finalPath}.tmp.${Date.now()}`;
+  writeFile(tmpPath, buffer)
+    .then(() => rename(tmpPath, finalPath))
+    .catch(() => {});
+
+  return { buffer, contentType };
+}
+
+export async function cacheImagesForTitle(titleId: string) {
+  const title = await db
+    .select()
+    .from(titles)
+    .where(eq(titles.id, titleId))
+    .get();
+  if (!title) return;
+
+  const tasks: Promise<unknown>[] = [];
+
+  if (
+    title.posterPath &&
+    !isImageCached("posters", path.basename(title.posterPath))
+  ) {
+    tasks.push(downloadAndCacheImage(title.posterPath, "posters"));
+  }
+  if (
+    title.backdropPath &&
+    !isImageCached("backdrops", path.basename(title.backdropPath))
+  ) {
+    tasks.push(downloadAndCacheImage(title.backdropPath, "backdrops"));
+  }
+
+  // Season posters
+  if (title.type === "tv") {
+    const allSeasons = await db
+      .select()
+      .from(seasons)
+      .where(eq(seasons.titleId, titleId))
+      .all();
+    for (const s of allSeasons) {
+      if (
+        s.posterPath &&
+        !isImageCached("posters", path.basename(s.posterPath))
+      ) {
+        tasks.push(downloadAndCacheImage(s.posterPath, "posters"));
+      }
+    }
+  }
+
+  await Promise.allSettled(tasks);
+}
+
+export async function cacheEpisodeStills(titleId: string) {
+  const allSeasons = await db
+    .select()
+    .from(seasons)
+    .where(eq(seasons.titleId, titleId))
+    .all();
+
+  for (const s of allSeasons) {
+    const eps = await db
+      .select()
+      .from(episodes)
+      .where(eq(episodes.seasonId, s.id))
+      .all();
+
+    const tasks: Promise<unknown>[] = [];
+    for (const ep of eps) {
+      if (
+        ep.stillPath &&
+        !isImageCached("stills", path.basename(ep.stillPath))
+      ) {
+        tasks.push(downloadAndCacheImage(ep.stillPath, "stills"));
+      }
+    }
+    await Promise.allSettled(tasks);
+  }
+}
+
+export async function cacheProviderLogos(titleId: string) {
+  const offers = await db
+    .select()
+    .from(availabilityOffers)
+    .where(eq(availabilityOffers.titleId, titleId))
+    .all();
+
+  const tasks: Promise<unknown>[] = [];
+  const seen = new Set<string>();
+  for (const offer of offers) {
+    if (offer.logoPath) {
+      const basename = path.basename(offer.logoPath);
+      if (!seen.has(basename) && !isImageCached("logos", basename)) {
+        seen.add(basename);
+        tasks.push(downloadAndCacheImage(offer.logoPath, "logos"));
+      }
+    }
+  }
+  await Promise.allSettled(tasks);
+}