feat(platform): add Discord onboarding and Velocity gate

apps/web/src/components/admin-sign-in-button.tsx

@@ -0,0 +1,15 @@
+"use client";
+
+import { signIn } from "next-auth/react";
+
+export function AdminSignInButton() {
+  return (
+    <button
+      className="w-full border border-ink bg-ink px-5 py-4 font-mono text-xs font-bold uppercase tracking-[0.16em] text-canvas transition-transform hover:-translate-y-0.5"
+      onClick={() => signIn("keycloak", { callbackUrl: "/admin" })}
+      type="button"
+    >
+      Continue with SSO
+    </button>
+  );
+}

apps/web/src/components/admin-sign-out-button.tsx

@@ -0,0 +1,15 @@
+"use client";
+
+import { signOut } from "next-auth/react";
+
+export function AdminSignOutButton() {
+  return (
+    <button
+      className="font-mono text-[10px] font-bold uppercase tracking-widest text-muted underline decoration-line underline-offset-4 hover:text-ink"
+      onClick={() => signOut({ callbackUrl: "/admin/login" })}
+      type="button"
+    >
+      Sign out
+    </button>
+  );
+}