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/utils/index.ts

@@ -0,0 +1,57 @@
+import { logger } from "@turbostarter/shared/logger";
+
+import { config } from "../config";
+import { translations } from "../translations";
+
+import type { TranslationKey } from "../client";
+import type { DefaultNamespace, Namespace, i18n } from "i18next";
+
+export const loadTranslation = async (
+  locale: (typeof config.locales)[number],
+  namespace: (typeof config.namespaces)[number],
+) => {
+  try {
+    const data = await translations[locale][namespace]();
+
+    return data.default;
+  } catch {
+    logger.error(`Error while loading i18n file: ${locale}/${namespace}.json`);
+
+    return {};
+  }
+};
+
+export const isKey = <T extends Namespace = DefaultNamespace>(
+  key: string,
+  i18n?: i18n,
+  ns?: T,
+): key is TranslationKey<T> => {
+  return i18n?.exists(key, { ns }) ?? false;
+};
+
+export const isLocaleSupported = (
+  locale: string,
+): locale is (typeof config.locales)[number] => config.locales.includes(locale);
+
+export const getPathname = ({
+  locale,
+  path,
+  defaultLocale,
+}: {
+  locale: string;
+  path: string;
+  defaultLocale?: string;
+}) => {
+  const pathname = path.replace(
+    new RegExp(`^/(${config.locales.join("|")})`),
+    "",
+  );
+
+  if (locale === (defaultLocale ?? config.defaultLocale)) {
+    return pathname.startsWith("/") ? pathname : `/${pathname}`;
+  }
+
+  return `/${locale}${pathname.startsWith("/") ? pathname : `/${pathname}`}`;
+};
+
+export * from "./validation";