feat(launch): waitlist page, raw-WebGPU hero, supabase + vercel infra

The July 14 launch surface, previously uncommitted:
- /dashboard/launch raw-WebGPU particle "memory brain" hero (RawVestigeEngine,
  NeuralWordmark, dendrite sign) + DOM waitlist overlay with share/referral.
- Supabase waitlist client + migrations + welcome edge function; legacy waitlist
  archived under supabase/legacy.
- vercel.json deploy config, root-redirect env wiring, base-path config,
  graph-only route, Playwright launch verifiers.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

supabase/legacy/0001_waitlist.sql

@@ -0,0 +1,37 @@
+-- Vestige Pro waitlist capture.
+--
+-- One row per signup from the public /dashboard/waitlist form. The form POSTs
+-- through the `waitlist-join` Edge Function (service-role), NOT directly to this
+-- table, so Row-Level Security stays closed to anon clients while the function
+-- can insert. We keep the table minimal and queryable for launch-day export.
+
+create table if not exists public.waitlist (
+    id          uuid primary key default gen_random_uuid(),
+    email       text not null,
+    name        text,
+    plan        text,                       -- 'solo' | 'team' (free-form, not enforced)
+    priority    text,                       -- 'sync' | 'team-memory' | 'postgres' | 'support'
+    notes       text,
+    source      text default 'vestige-pro-waitlist',
+    user_agent  text,
+    -- Lowercased email for case-insensitive dedup. Generated so callers can't
+    -- desync it from `email`.
+    email_norm  text generated always as (lower(trim(email))) stored,
+    created_at  timestamptz not null default now()
+);
+
+-- One signup per email address. ON CONFLICT in the function turns a re-submit
+-- into a friendly "already on the list" instead of a duplicate row or an error.
+create unique index if not exists waitlist_email_norm_key
+    on public.waitlist (email_norm);
+
+-- Newest-first export / dashboards.
+create index if not exists waitlist_created_at_idx
+    on public.waitlist (created_at desc);
+
+-- RLS ON, no anon policies: the anon/public key can do NOTHING here directly.
+-- Only the service-role key used inside the Edge Function bypasses RLS to insert.
+alter table public.waitlist enable row level security;
+
+comment on table public.waitlist is
+    'Vestige Pro launch waitlist. Inserted only via the waitlist-join Edge Function (service-role). RLS blocks all anon access.';

supabase/legacy/README.md

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+# Legacy waitlist backend (archived)
+
+These files backed the **old** `/dashboard/waitlist` page (Canvas2D grid +
+support bot), which POSTed signups to the `waitlist-join` Edge Function using a
+service-role insert.
+
+The **live launch page** is `/dashboard/launch`. It uses a different, simpler
+architecture: direct browser inserts with the public anon key + insert-only RLS,
+plus `security definer` RPCs for the referral loop. See:
+
+- Schema + RPCs: `supabase/migrations/0002_launch_waitlist.sql`
+- Go-live runbook: `docs/launch/waitlist-setup.md`
+- Welcome/share email: `supabase/functions/waitlist-welcome/`
+
+Both schemas declared a table literally named `waitlist` with **incompatible**
+shapes (this one is `uuid` PK with `name/plan/notes`; the launch one is `bigint`
+PK with `referral_code/referred_by`). They cannot coexist in the same database
+under that name. The launch schema is the source of truth as of 2026-06-26.
+
+Kept for reference / in case the old page is ever revived (it would need its own
+table name). Nothing in the app references `waitlist-join` anymore.

supabase/legacy/waitlist-join/index.ts

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+// Vestige Pro waitlist capture — Supabase Edge Function (Deno).
+//
+// The public /dashboard/waitlist form POSTs JSON here. This function:
+//   1. Handles CORS preflight (the form is served from a different origin).
+//   2. Validates the email and rejects honeypot/bot submissions.
+//   3. Inserts one row per email into public.waitlist (dedup on re-submit).
+//   4. Optionally sends a confirmation email via Resend.
+//
+// Secrets (set with `supabase secrets set`, NEVER committed):
+//   SUPABASE_URL, SUPABASE_SERVICE_ROLE_KEY  — auto-injected by Supabase
+//   RESEND_API_KEY                           — optional; if unset, skip email
+//   WAITLIST_FROM_EMAIL                      — optional; defaults below
+//   WAITLIST_ALLOWED_ORIGIN                  — optional CORS allowlist (comma-sep)
+
+import { createClient } from "jsr:@supabase/supabase-js@2";
+
+const DEFAULT_FROM = "Vestige <waitlist@vestige.dev>";
+
+function corsHeaders(origin: string | null): HeadersInit {
+  const allow = (Deno.env.get("WAITLIST_ALLOWED_ORIGIN") ?? "")
+    .split(",")
+    .map((s) => s.trim())
+    .filter(Boolean);
+  // If an allowlist is configured and the origin isn't on it, fall back to the
+  // first allowed origin (so browsers see a definite, non-wildcard value).
+  const allowedOrigin =
+    allow.length === 0 ? "*" : (origin && allow.includes(origin) ? origin : allow[0]);
+  return {
+    "Access-Control-Allow-Origin": allowedOrigin,
+    "Access-Control-Allow-Methods": "POST, OPTIONS",
+    "Access-Control-Allow-Headers": "content-type",
+    "Content-Type": "application/json",
+  };
+}
+
+interface WaitlistPayload {
+  name?: string;
+  email?: string;
+  plan?: string;
+  priority?: string;
+  notes?: string;
+  source?: string;
+  companySite?: string; // honeypot — must be empty
+}
+
+const EMAIL_RE = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+
+async function sendConfirmation(email: string, name: string) {
+  const key = Deno.env.get("RESEND_API_KEY");
+  if (!key) return; // email is optional; capture still succeeds without it
+  const from = Deno.env.get("WAITLIST_FROM_EMAIL") ?? DEFAULT_FROM;
+  const greeting = name ? `Hi ${name},` : "Hi,";
+  try {
+    await fetch("https://api.resend.com/emails", {
+      method: "POST",
+      headers: {
+        "Authorization": `Bearer ${key}`,
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify({
+        from,
+        to: email,
+        subject: "You're on the Vestige Pro list",
+        text:
+          `${greeting}\n\nYou're on the Vestige Pro early-access list. ` +
+          `We'll email you before launch with your invite.\n\n— The Vestige team`,
+      }),
+    });
+  } catch (_err) {
+    // Never fail the signup because the email provider hiccuped.
+  }
+}
+
+Deno.serve(async (req) => {
+  const origin = req.headers.get("origin");
+  const headers = corsHeaders(origin);
+
+  if (req.method === "OPTIONS") {
+    return new Response(null, { status: 204, headers });
+  }
+  if (req.method !== "POST") {
+    return new Response(JSON.stringify({ ok: false, error: "method_not_allowed" }), {
+      status: 405,
+      headers,
+    });
+  }
+
+  let body: WaitlistPayload;
+  try {
+    body = await req.json();
+  } catch {
+    return new Response(JSON.stringify({ ok: false, error: "invalid_json" }), {
+      status: 400,
+      headers,
+    });
+  }
+
+  // Honeypot: real users never fill this hidden field. Pretend success so bots
+  // get no signal, but write nothing.
+  if (body.companySite && body.companySite.trim()) {
+    return new Response(JSON.stringify({ ok: true, deduped: false }), { status: 200, headers });
+  }
+
+  const email = (body.email ?? "").trim();
+  if (!EMAIL_RE.test(email)) {
+    return new Response(JSON.stringify({ ok: false, error: "invalid_email" }), {
+      status: 400,
+      headers,
+    });
+  }
+
+  const supabase = createClient(
+    Deno.env.get("SUPABASE_URL")!,
+    Deno.env.get("SUPABASE_SERVICE_ROLE_KEY")!,
+  );
+
+  // Insert; on email conflict, treat as already-joined (idempotent, friendly).
+  const row = {
+    email,
+    name: (body.name ?? "").trim() || null,
+    plan: (body.plan ?? "").trim() || null,
+    priority: (body.priority ?? "").trim() || null,
+    notes: (body.notes ?? "").trim() || null,
+    source: (body.source ?? "vestige-pro-waitlist").trim(),
+    user_agent: req.headers.get("user-agent")?.slice(0, 400) ?? null,
+  };
+
+  const { error } = await supabase.from("waitlist").insert(row);
+
+  if (error) {
+    // 23505 = unique_violation on email_norm → already on the list.
+    if (error.code === "23505") {
+      return new Response(JSON.stringify({ ok: true, deduped: true }), { status: 200, headers });
+    }
+    console.error("waitlist insert failed:", error);
+    return new Response(JSON.stringify({ ok: false, error: "storage_failed" }), {
+      status: 500,
+      headers,
+    });
+  }
+
+  // Fire-and-forget confirmation; the signup is already committed.
+  await sendConfirmation(email, row.name ?? "");
+
+  return new Response(JSON.stringify({ ok: true, deduped: false }), { status: 200, headers });
+});