add user profile, profile vibe and trip vibe and social signal

components/shared/navbar.tsx

@@ -35,6 +35,12 @@ export function Navbar() {
           >
             Open Trip
           </Link>
+          <Link
+            href="/people"
+            className="rounded-lg px-3 py-1.5 text-sm font-medium text-neutral-600 transition-colors hover:bg-neutral-100 hover:text-neutral-800"
+          >
+            Cari Teman
+          </Link>
 
           {session?.user ? (
             <>
@@ -125,6 +131,13 @@ export function Navbar() {
             >
               Open Trip
             </Link>
+            <Link
+              href="/people"
+              onClick={() => setMenuOpen(false)}
+              className="rounded-lg px-3 py-2.5 text-sm font-medium text-neutral-700 transition-colors hover:bg-neutral-50"
+            >
+              Cari Teman
+            </Link>
 
             {session?.user ? (
               <>

components/shared/profile-nudge-banner.tsx

@@ -0,0 +1,41 @@
+import Link from "next/link";
+import { getServerSession } from "next-auth";
+import { authOptions } from "@/lib/auth";
+import { profileRepo } from "@/server/repositories/profile.repo";
+
+/**
+ * Server component banner: muncul di atas semua halaman ketika user sudah login
+ * tapi profil sosialnya kosong. Menjaga janji "kenalan dulu, gabung kemudian"
+ * dengan mendorong user mengisi minat/kota sebelum join trip.
+ */
+export async function ProfileNudgeBanner() {
+  const session = await getServerSession(authOptions);
+  if (!session?.user?.id) return null;
+
+  const profile = await profileRepo.findByUserId(session.user.id);
+  const hasMeaningfulProfile =
+    !!profile &&
+    (!!profile.bio?.trim() ||
+      !!profile.city?.trim() ||
+      profile.interests.length > 0);
+
+  if (hasMeaningfulProfile) return null;
+
+  return (
+    <div className="border-b border-amber-200 bg-amber-50">
+      <div className="mx-auto flex max-w-6xl flex-col items-start gap-2 px-4 py-2.5 text-xs sm:flex-row sm:items-center sm:justify-between sm:text-sm">
+        <p className="text-amber-900">
+          <span className="font-semibold">Lengkapi profil sosial kamu</span> —
+          bio, kota, dan minat. Calon teman trip akan lebih mudah kenal kamu
+          sebelum gabung bareng.
+        </p>
+        <Link
+          href="/profile"
+          className="shrink-0 rounded-lg bg-amber-600 px-3 py-1.5 text-xs font-semibold text-white hover:bg-amber-700"
+        >
+          Isi profil sekarang
+        </Link>
+      </div>
+    </div>
+  );
+}