feat(frontend): rebuild as Ambient/WebGL console with all pages + command palette

Ground-up rombak UI: hapus semua component/page lama, bangun ulang dengan
desain sistem Ambient (WebGL haze + drifting motes, signal-driven color)
di atas kontrak API/WS/type yang sudah ada.

- Design system: globals.css tokens + primitives (glass, button, badge,
  select, avatar, toast, chart SVG murni).
- Shell: nav rail, topbar (status WS + pill signal + theme), AppFrame.
- 8 halaman: dashboard, voice (orbital stage), media, messages (live feed +
  detail AI), moderation, analysis (search), recordings, + chatbot floating.
- Command palette (Cmd/Ctrl+K) untuk navigasi cepat.
- Server fetch di-page di-try/catch agar render graceful saat backend mati.

Verified: tsc clean, next build 8/8 halaman, semua route 200.

services/frontend/src/components/shell/ambient-app.tsx

@@ -0,0 +1,21 @@
+import { NavRail } from "./nav-rail";
+import { TopBar } from "./topbar";
+
+/**
+ * App chrome: slim nav rail + sticky top bar + scrollable content region.
+ * Sits above the fixed AmbientCanvas. Providers (Ambient + WS) are mounted in
+ * the route layout so every page shares one live link and signal context.
+ */
+export function AppFrame({ children }: { children: React.ReactNode }) {
+  return (
+    <div className="flex h-dvh w-full overflow-hidden">
+      <NavRail />
+      <div className="flex min-w-0 flex-1 flex-col">
+        <TopBar />
+        <main className="min-h-0 flex-1 overflow-y-auto px-5 pb-8">
+          {children}
+        </main>
+      </div>
+    </div>
+  );
+}