refresh locales after any change, not just a version update

locales/version.js

@@ -0,0 +1,14 @@
+import { createHash } from 'crypto';
+import locales from './index.js';
+
+// MD5 is acceptable because we don't need cryptographic security.
+const hash = createHash('md5');
+
+// Derive the version hash from locale content exclusively.
+// This avoids the problem of "stuck" translations after modifying locale files.
+const localesText = JSON.stringify(locales);
+hash.update(localesText, 'utf8');
+
+// We can't use regular base64 since this becomes part of a filename.
+// Base64URL avoids special characters that would cause an issue.
+export const localesVersion = hash.digest().toString('base64url');