Session 34: Design system Phase C — app shell, nav, routing, auth gate, footer, 404 (1818 tests)

VYNDR 2.0 conversion, Phase C (the frame every page sits inside). Frontend-only;
zero backend changes.

- Nav rewritten: new .wm Wordmark, mono uppercase links, More dropdown, search/
  bell/read-meter/avatar, Ticker under the bar. layout main paddingTop 64 -> 96.
- Routing: web/src/lib/routes.js (GATED/OPEN/HASH_ALIASES, isGatedRoute,
  resolveHashAlias). Client AuthGate bounces signed-out users off personal
  routes to /login?next=. HashRedirect maps #scan/#terminal to real routes.
- Footer rewritten to system voice + Detroit signature; mounted globally in
  layout (removed per-page dup).
- 404 converted to the north star (scanlines, crt-sweep, glitch wordmark, amber).
- Stub pages for terminal/compare/invite/help/about/notifications via RouteStub.

Honest reconciliations: auth gate is client-side (no auth-helpers pkg; session is
client-side Supabase); GATED narrowed to protect the free-scan funnel; did not
stub over existing real pages; redirect param is ?next= (what /login reads).

26 new tests. Backend 1792 -> 1818, 142 suites, zero regressions. Web build clean.

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

web/src/app/help/page.tsx

@@ -0,0 +1,13 @@
+import RouteStub from '@/components/vyndr/RouteStub';
+
+export const metadata = { title: 'Help' };
+
+export default function HelpPage() {
+  return (
+    <RouteStub
+      title="Help & FAQ"
+      arriving="SESSION 36"
+      blurb="Searchable answers on grades, reads, plans, and how to read the signal."
+    />
+  );
+}