fix(version): 修正概览耗时与排名统计

apps/web/lib/work-hours.test.ts

@@ -0,0 +1,16 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import { calcActualElapsedHours, formatActualDuration } from './work-hours';
+
+test('calcActualElapsedHours uses real elapsed time with a half-hour minimum', () => {
+  assert.equal(calcActualElapsedHours('2026-06-22T09:00:00', '2026-06-22T09:10:00'), 0.5);
+  assert.equal(calcActualElapsedHours('2026-06-22T09:00:00', '2026-06-22T10:15:00'), 1.5);
+  assert.equal(calcActualElapsedHours('2026-06-22T10:00:00', '2026-06-22T09:00:00'), 0);
+});
+
+test('formatActualDuration converts hours to natural days', () => {
+  assert.equal(formatActualDuration(60.5), '60.5h（2.5天）');
+  assert.equal(formatActualDuration(0.5), '0.5h（0.02天）');
+  assert.equal(formatActualDuration(0), '0h（0天）');
+});