Initial commit: MOPC platform with Docker deployment setup

Full Next.js 15 platform with tRPC, Prisma, PostgreSQL, NextAuth.
Includes production Dockerfile (multi-stage, port 7600), docker-compose
with registry-based image pull, Gitea Actions CI workflow, nginx config
for portal.monaco-opc.com, deployment scripts, and DEPLOYMENT.md guide.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/(mentor)/mentor/layout.tsx

@@ -0,0 +1,7 @@
+import type { Metadata } from 'next'
+
+export const metadata: Metadata = { title: 'Mentor Dashboard' }
+
+export default function MentorPageLayout({ children }: { children: React.ReactNode }) {
+  return children
+}