feat(scheduling): history view, execute/cancel lifecycle, CSV export, 7d trend

- Add 调度记录 modal: lists notifications by status, supports 标记已执行 (with
  after-mileage + notes) and 取消 for open records
- Add CSV export of filtered suggestions (UTF-8 BOM for Excel); top candidate
  per row picked by same-region > can-qualify preference
- Compute customer 7-day average alongside 30-day baseline in a single query;
  show trend indicator (up/down/flat) next to 客户日均 in list and detail card

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/modules/scheduling/csv-export.ts

@@ -0,0 +1,103 @@
+import type { SchedulingSuggestion, CandidateVehicle } from './types';
+
+function csvCell(v: string | number | null | undefined): string {
+  if (v === null || v === undefined) return '';
+  const s = typeof v === 'number' ? String(v) : v;
+  if (/[",\n\r]/.test(s)) return `"${s.replace(/"/g, '""')}"`;
+  return s;
+}
+
+function pickTopCandidate(s: SchedulingSuggestion): CandidateVehicle | null {
+  if (s.candidates.length === 0) return null;
+  const sameRegion = s.candidates.filter(c => c.isSameRegion);
+  const pool = sameRegion.length > 0 ? sameRegion : s.candidates;
+  return pool.find(c => c.canQualifyAfterSwap) ?? pool[0];
+}
+
+function pctString(rate: number): string {
+  return (rate * 100).toFixed(1) + '%';
+}
+
+function typeLabel(s: SchedulingSuggestion): string {
+  return s.type === 'replace_qualified' ? '里程高·换下' : '里程低·换走';
+}
+
+const HEADERS = [
+  '车牌号',
+  '业务部门',
+  '业务负责人',
+  '客户',
+  '车型',
+  '运营区域',
+  '调度类型',
+  '当前年里程(km)',
+  '年度考核(km)',
+  '年度完成率',
+  '客户30日均(km)',
+  '客户7日均(km)',
+  '剩余天数',
+  '最优候选车牌',
+  '候选当前里程(km)',
+  '候选替换后预估(km)',
+  '候选可达标',
+  '候选区域',
+  '通知状态',
+] as const;
+
+export function buildSuggestionsCsv(suggestions: SchedulingSuggestion[]): string {
+  const rows: string[] = [HEADERS.map(csvCell).join(',')];
+  for (const s of suggestions) {
+    const v = s.currentVehicle;
+    const top = pickTopCandidate(s);
+    const notifStatus =
+      s.candidates.find(c => c.notificationStatus === 'executed') ? '已执行'
+      : s.candidates.find(c => c.notificationStatus === 'sent') ? '待执行'
+      : '';
+    rows.push([
+      csvCell(v.plateNumber),
+      csvCell(v.department ?? ''),
+      csvCell(v.manager ?? ''),
+      csvCell(v.customer ?? ''),
+      csvCell(v.vehicleType),
+      csvCell(v.region),
+      csvCell(typeLabel(s)),
+      csvCell(Math.round(v.currentYearMileage)),
+      csvCell(Math.round(v.yearTarget)),
+      csvCell(pctString(v.completionRate)),
+      csvCell(Math.round(v.customerAvgDaily)),
+      csvCell(Math.round(v.customerAvgDaily7d)),
+      csvCell(v.daysLeft),
+      csvCell(top?.plateNumber ?? ''),
+      csvCell(top ? Math.round(top.totalMileage) : ''),
+      csvCell(top ? Math.round(top.predictedAfterSwap) : ''),
+      csvCell(top ? (top.canQualifyAfterSwap ? '是' : '否') : ''),
+      csvCell(top?.region ?? ''),
+      csvCell(notifStatus),
+    ].join(','));
+  }
+  return rows.join('\r\n');
+}
+
+export function downloadCsv(filename: string, csv: string): void {
+  // UTF-8 BOM so Excel opens Chinese characters correctly
+  const blob = new Blob(['\uFEFF', csv], { type: 'text/csv;charset=utf-8' });
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = filename;
+  document.body.appendChild(a);
+  a.click();
+  document.body.removeChild(a);
+  URL.revokeObjectURL(url);
+}
+
+export function exportSuggestionsCsv(suggestions: SchedulingSuggestion[], prefix = '调度建议'): void {
+  const now = new Date();
+  const y = now.getFullYear();
+  const m = String(now.getMonth() + 1).padStart(2, '0');
+  const d = String(now.getDate()).padStart(2, '0');
+  const hh = String(now.getHours()).padStart(2, '0');
+  const mm = String(now.getMinutes()).padStart(2, '0');
+  const csv = buildSuggestionsCsv(suggestions);
+  downloadCsv(`${prefix}_${y}${m}${d}_${hh}${mm}.csv`, csv);
+}