fix(build): mark Payload-fetching pages as force-dynamic

Static prerender at build time fails when PAYLOAD_SECRET/DATABASE_URI
are unset. About/Projects/Contact + project detail all read from
Payload at request time — make that explicit.

src/app/(frontend)/about/page.tsx

@@ -6,6 +6,7 @@ import { RichText } from "@payloadcms/richtext-lexical/react";
 import { GridOverlay, TechChip } from "@/components/site";
 
 export const metadata: Metadata = { title: "About" };
+export const dynamic = "force-dynamic";
 
 type MediaDoc = {
   url?: string | null;

src/app/(frontend)/contact/page.tsx

@@ -7,6 +7,7 @@ import { GridOverlay, StatusTerminal } from "@/components/site";
 import { ContactForm } from "./ContactForm";
 
 export const metadata: Metadata = { title: "Contact" };
+export const dynamic = "force-dynamic";
 
 const ICON_MAP = {
   email: Mail,

src/app/(frontend)/projects/[slug]/page.tsx

@@ -8,6 +8,8 @@ import { RichText } from "@payloadcms/richtext-lexical/react";
 import { GridOverlay, TechChip } from "@/components/site";
 import type { Project, Media } from "@/payload-types";
 
+export const dynamic = "force-dynamic";
+
 type Params = { slug: string };
 
 function isMedia(val: unknown): val is Media {

src/app/(frontend)/projects/page.tsx

@@ -9,6 +9,7 @@ export const metadata: Metadata = {
   description:
     "A curated selection of industrial infrastructure, research platforms, and independent consultancy projects engineered for high-performance environments.",
 };
+export const dynamic = "force-dynamic";
 
 export default async function ProjectsIndexPage() {
   const payload = await getPayload({ config });