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>

packages/i18n/src/env.ts

@@ -0,0 +1,29 @@
+/* eslint-disable turbo/no-undeclared-env-vars */
+import { defineEnv } from "envin";
+import * as z from "zod";
+
+import { envConfig } from "@turbostarter/shared/constants";
+
+import { Locale } from "./types";
+
+import type { Preset } from "envin/types";
+
+export const preset = {
+  id: "i18n",
+  clientPrefix: "NEXT_PUBLIC_",
+  client: {
+    NEXT_PUBLIC_DEFAULT_LOCALE: z.string().optional().default(Locale.EN),
+  },
+  server: {
+    DEFAULT_LOCALE: z.string().optional(),
+  },
+} as const satisfies Preset;
+
+export const env = defineEnv({
+  ...envConfig,
+  ...preset,
+  env: {
+    DEFAULT_LOCALE: process.env.DEFAULT_LOCALE,
+    NEXT_PUBLIC_DEFAULT_LOCALE: process.env.NEXT_PUBLIC_DEFAULT_LOCALE,
+  },
+});