refactor typescript wiring

webclient/src/polyfills.ts

@@ -0,0 +1,19 @@
+// Runtime polyfills that must execute before any other application module.
+// Import this file first from `src/index.tsx`.
+
+// ── BigInt.prototype.toJSON ───────────────────────────────────────────────────
+// Protobuf-ES maps proto `int64`/`uint64` fields to native `BigInt`. Those
+// land in Redux state (e.g. `ServerInfo_User.accountageSecs`,
+// `Response_Register.deniedEndTime`, the outbound `cmdId`), and any consumer
+// that JSON-stringifies state — notably the Redux DevTools browser
+// extension, but also logging and error-boundary dumps — throws with
+// "Do not know how to serialize a BigInt" because `BigInt.prototype` has no
+// `toJSON`. Installing one globally makes `JSON.stringify` coerce
+// `BigInt → string` instead of throwing. Coercion is lossy but only affects
+// serialized representations; the in-memory Redux state still holds real
+// `BigInt`s and every consumer reads them via the generated proto accessors.
+(BigInt.prototype as unknown as { toJSON: () => string }).toJSON = function bigIntToJSON() {
+  return this.toString();
+};
+
+export {};