enhance booking window logic to support overnight desk configurations and update related UI components

apps/edr-freight-api/src/modules/train-scheduling/batch-window.util.spec.ts

@@ -121,6 +121,44 @@ describe('computeImportWindowTimes — first-window open respects office hours',
   });
 });
 
+describe('computeImportWindowTimes — overnight desk (open > close, wraps midnight)', () => {
+  // Overnight desk 08:00 → 07:00 next morning: open across [08:00, 24:00) and
+  // [00:00, 07:00). Only the daytime gap [07:00, 08:00) is shut.
+  const overnight = {
+    importWindowLeadDays: 3,
+    windowOpenHour: 8,
+    windowCloseHour: 7,
+    windowDurationHours: 6,
+  };
+
+  it('opens NOW in the evening side of the window (after open hour)', () => {
+    // Departs 06 Jul 10:00 EAT (07:00 UTC). Now = 05 Jul 20:00 EAT (17:00 UTC):
+    // ≥ 08:00 → desk open → open immediately.
+    const departure = new Date('2026-07-06T07:00:00.000Z');
+    const now = new Date('2026-07-05T17:00:00.000Z');
+    const { windowOpensAt } = computeImportWindowTimes(departure, overnight, now);
+    expect(windowOpensAt.toISOString()).toBe('2026-07-05T17:00:00.000Z');
+  });
+
+  it('opens NOW after midnight (before close hour)', () => {
+    // Departs 06 Jul 10:00 EAT (07:00 UTC). Now = 06 Jul 02:00 EAT (05 Jul 23:00
+    // UTC): < 07:00 → still inside the overnight window → open immediately.
+    const departure = new Date('2026-07-06T07:00:00.000Z');
+    const now = new Date('2026-07-05T23:00:00.000Z');
+    const { windowOpensAt } = computeImportWindowTimes(departure, overnight, now);
+    expect(windowOpensAt.toISOString()).toBe('2026-07-05T23:00:00.000Z');
+  });
+
+  it('waits until open hour in the daytime gap [close, open)', () => {
+    // Departs 06 Jul 10:00 EAT (07:00 UTC). Now = 05 Jul 07:30 EAT (04:30 UTC):
+    // in the shut daytime gap → opens 05 Jul 08:00 EAT (05:00 UTC).
+    const departure = new Date('2026-07-06T07:00:00.000Z');
+    const now = new Date('2026-07-05T04:30:00.000Z');
+    const { windowOpensAt } = computeImportWindowTimes(departure, overnight, now);
+    expect(windowOpensAt.toISOString()).toBe('2026-07-05T05:00:00.000Z');
+  });
+});
+
 describe('batch-window board windows (config-driven booking cycles)', () => {
   // Default rules: open 08:00 EAT, desk shuts 17:00, 3 days before departure,
   // 3h long, reopen 90m later.