Tune caching: shorter revalidate, lighter fetches, on-demand purge.

Use paginated list fetches with stripped list payloads, recent-item helpers for carousels, fetch tags + POST /api/revalidate, and 5-minute page ISR instead of 1 hour.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/api/revalidate/route.ts

@@ -0,0 +1,69 @@
+import { revalidatePath, revalidateTag } from "next/cache";
+import { NextRequest, NextResponse } from "next/server";
+
+type RevalidateBody = {
+  /** Revalidate a fetch cache tag (portfolios, blogs, portfolio:slug, blog:slug, …). */
+  tag?: string;
+  /** Revalidate a path (/portfolios/foo, /, …). */
+  path?: string;
+  /** Shorthand: portfolios | blogs | all */
+  scope?: "portfolios" | "blogs" | "all";
+};
+
+/**
+ * On-demand cache purge — call after CMS publish/update.
+ *
+ * POST /api/revalidate
+ * Header: x-revalidate-secret: <REVALIDATE_SECRET>
+ * Body (JSON, optional): { "scope": "all" } | { "tag": "portfolios" } | { "path": "/portfolios/item" }
+ *
+ * nginx may still serve cached HTML for up to its TTL (5m) unless purged separately.
+ */
+export async function POST(req: NextRequest) {
+  const secret = process.env.REVALIDATE_SECRET;
+  if (!secret) {
+    return NextResponse.json({ ok: false, error: "REVALIDATE_SECRET not configured" }, { status: 503 });
+  }
+
+  const provided =
+    req.headers.get("x-revalidate-secret") ?? req.nextUrl.searchParams.get("secret");
+  if (provided !== secret) {
+    return NextResponse.json({ ok: false, error: "Unauthorized" }, { status: 401 });
+  }
+
+  let body: RevalidateBody = {};
+  try {
+    body = (await req.json()) as RevalidateBody;
+  } catch {
+    body = {};
+  }
+
+  const scope = body.scope ?? "all";
+  const revalidated: string[] = [];
+
+  if (body.tag) {
+    revalidateTag(body.tag);
+    revalidated.push(`tag:${body.tag}`);
+  } else if (body.path) {
+    revalidatePath(body.path);
+    revalidated.push(`path:${body.path}`);
+  } else if (scope === "portfolios" || scope === "all") {
+    revalidateTag("portfolios");
+    revalidatePath("/");
+    revalidatePath("/portfolios");
+    revalidatePath("/aboutus");
+    revalidatePath("/our-services");
+    revalidated.push("scope:portfolios");
+  }
+
+  if (scope === "blogs" || scope === "all") {
+    revalidateTag("blogs");
+    revalidateTag("blogs:news");
+    revalidatePath("/news");
+    revalidatePath("/blog");
+    revalidatePath("/news-and-blog");
+    revalidated.push("scope:blogs");
+  }
+
+  return NextResponse.json({ ok: true, revalidated, at: new Date().toISOString() });
+}