Hermetiska integrationstester + auto-hushall i onboarding (size, i18n, locations)

apps/api/src/lib/i18n.ts

@@ -0,0 +1,31 @@
+import { readFileSync } from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+const cache: Record<string, Record<string, string>> = {};
+
+/**
+ * Minimal server-side i18n lookup into the mobile app's common.json files.
+ * Falls back to the requested key if the translation is missing.
+ */
+export function t(key: string, languageTag: string): string {
+  const lang = (languageTag.split("-")[0] ?? languageTag).toLowerCase();
+  let dict = cache[lang];
+  if (!dict) {
+    try {
+      const file = path.resolve(
+        __dirname,
+        "../../../../apps/mobile/src/locales",
+        lang,
+        "common.json",
+      );
+      dict = JSON.parse(readFileSync(file, "utf8")) as Record<string, string>;
+    } catch {
+      dict = {};
+    }
+    cache[lang] = dict;
+  }
+  return dict[key] ?? key;
+}