feat(platform): add Discord onboarding and Velocity gate

apps/web/src/app/page.tsx

@@ -4,7 +4,15 @@ const steps = [
   ["03", "Join the server", "Add your Java account and connect once approved."],
 ] as const;
 
-export default function HomePage() {
+export default async function HomePage({
+  searchParams,
+}: {
+  searchParams: Promise<{ portal?: string }>;
+}) {
+  const { portal } = await searchParams;
+  const inviteUrl = process.env.DISCORD_INVITE_URL?.trim();
+  const guildId = process.env.DISCORD_GUILD_ID?.trim();
+
   return (
     <main className="relative min-h-screen overflow-hidden bg-canvas text-ink">
       <div className="terrain" aria-hidden="true" />
@@ -22,6 +30,12 @@ export default function HomePage() {
           </span>
         </header>
 
+        {portal && (
+          <div className="mt-8 border border-accent bg-panel px-5 py-4 font-mono text-xs leading-6 shadow-[5px_5px_0_var(--color-accent)]">
+            The account portal starts in Discord. Join the server, then run <strong>/register</strong> or <strong>/account</strong> to receive your private sign-in link.
+          </div>
+        )}
+
         <section id="top" className="grid flex-1 items-center gap-14 py-20 lg:grid-cols-[1.15fr_0.85fr] lg:py-24">
           <div>
             <p className="mb-7 font-mono text-xs font-semibold uppercase tracking-[0.3em] text-accent">
@@ -57,6 +71,16 @@ export default function HomePage() {
               <span className="text-signal">&gt;</span> Open Discord and type <strong>/register</strong>
               <span className="cursor ml-1 inline-block h-4 w-2 bg-signal align-middle" />
             </div>
+            <div className="mt-5 grid gap-3 sm:grid-cols-2">
+              {inviteUrl ? (
+                <a className="border border-ink bg-accent px-4 py-3 text-center font-mono text-[10px] font-bold uppercase tracking-widest text-canvas" href={inviteUrl} rel="noreferrer" target="_blank">Join Discord server</a>
+              ) : (
+                <span className="border border-line px-4 py-3 text-center font-mono text-[10px] uppercase tracking-widest text-muted">Invite not configured</span>
+              )}
+              {guildId && (
+                <a className="border border-ink px-4 py-3 text-center font-mono text-[10px] font-bold uppercase tracking-widest" href={`discord://-/channels/${guildId}`}>Open Discord app</a>
+              )}
+            </div>
           </aside>
         </section>