feat: add ETC records and bill drilldowns

src/server/routes/energy/query.test.ts

@@ -7,6 +7,9 @@ import {
   parseHydrogenCustomerName,
   parseHydrogenStationId,
   parseEnergyDate,
+  parseEtcLimit,
+  parseEtcPage,
+  parseEtcSearch,
 } from './query.js';
 
 test('parses only non-negative integer station ids', () => {
@@ -57,6 +60,15 @@ test('parses only valid energy calendar dates', () => {
   assert.equal(parseEnergyDate(undefined), null);
 });
 
+test('bounds ETC list pagination and search input', () => {
+  assert.equal(parseEtcPage('3'), 3);
+  assert.equal(parseEtcPage('-1'), 1);
+  assert.equal(parseEtcLimit('5'), 10);
+  assert.equal(parseEtcLimit('500'), 100);
+  assert.equal(parseEtcSearch('  粤A  '), '粤A');
+  assert.equal(parseEtcSearch('x'.repeat(129)), null);
+});
+
 test('rejects invalid electric drill filters before querying data', async () => {
   const invalidDate = await app.request('/electric/orders?date=2026-02-31&customer=lingniu');
   assert.equal(invalidDate.status, 400);