feat(db): mesh data model — meshes, members, invites, audit log

- pgSchema "mesh" with 4 tables isolating the peer mesh domain
- Enums: visibility, transport, tier, role
- audit_log is metadata-only (E2E encryption enforced at broker/client)
- Cascade on mesh delete, soft-delete via archivedAt/revokedAt

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/src/app/[locale]/(apps)/tts/layout.tsx

@@ -0,0 +1,27 @@
+import { getMetadata } from "~/lib/metadata";
+import { Header } from "~/modules/common/layout/header";
+import { ThemeSwitcher } from "~/modules/common/theme";
+
+export const generateMetadata = getMetadata({
+  title: "ai:tts.title",
+  description: "ai:tts.description",
+});
+
+export default function AgentLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  return (
+    <>
+      <Header className="bg-transparent">
+        <div className="flex items-center gap-1">
+          <ThemeSwitcher />
+        </div>
+      </Header>
+      <div className="@container relative flex h-full flex-col items-center contain-layout">
+        {children}
+      </div>
+    </>
+  );
+}