feat: add coming-soon page and update navigation links and middleware routes

src/app/coming-soon/page.tsx

@@ -0,0 +1,37 @@
+'use client';
+
+import Link from 'next/link';
+import { CommonHeader } from '@/components/layout/CommonHeader';
+import { Footer } from '@/components/layout/Footer';
+
+export default function ComingSoonPage() {
+  return (
+    <div className="min-h-screen bg-white flex flex-col">
+      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-6 w-full">
+        <CommonHeader />
+      </div>
+
+      <main className="flex-1 flex items-center justify-center px-4">
+        <div className="text-center max-w-[500px]">
+          <div className="w-16 h-16 bg-[#e58625]/10 rounded-full flex items-center justify-center mx-auto mb-6">
+            <span className="text-[32px]">🚧</span>
+          </div>
+          <h1 className="font-fractul font-bold text-[30px] text-[#00293d] mb-3">
+            Coming Soon
+          </h1>
+          <p className="font-serif text-[14px] text-[#00293d]/70 leading-relaxed mb-8">
+            This page is under development. Stay tuned for updates.
+          </p>
+          <Link
+            href="/"
+            className="inline-flex items-center justify-center px-6 h-[46px] bg-[#e58625] rounded-[15px] font-fractul font-bold text-[16px] text-[#00293d] hover:bg-[#d47720] transition-colors"
+          >
+            Go Back Home
+          </Link>
+        </div>
+      </main>
+
+      <Footer />
+    </div>
+  );
+}