Add Weekly Actuals directors report with charts

Full weekly actuals report matching the spreadsheet layout:
- Week summary table (Rooms/Dry/Wet vs Budget vs Last Year vs Last Week)
- Grouped bar chart + dept split pie chart
- 5-week rolling summary table
- Occupancy table by day of week (rooms, occ%, ARR, RevPAR)
- Month progress to date (totals + dept split) with progress bar chart
- 12-month turnover trend line chart by dept
- Utilities placeholder (pending meter readings app)

Budget values come from the forecasting API which distributes monthly
budget proportionally to daily sales — so high-demand weeks (e.g.
Christmas) carry a higher budget share. Gross shown as net × 1.20.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/api.ts

@@ -1,4 +1,4 @@
-import type { ReportMeta, ReportResult, WorksheetData, ForecastReportData } from './types'
+import type { ReportMeta, ReportResult, WorksheetData, ForecastReportData, WeeklyActualData } from './types'
 
 const BASE = '/reports/api'
 
@@ -30,6 +30,12 @@ export function runReport(id: string, dateFrom: string, dateTo: string): Promise
   })
 }
 
+// ── Weekly Actuals API ──────────────────────────────────────────────────────
+
+export function getWeeklyActual(weekEnding: string): Promise<WeeklyActualData> {
+  return request<WeeklyActualData>(`/weekly-actual/${weekEnding}`)
+}
+
 // ── Directors Forecast API ──────────────────────────────────────────────────
 
 export function dfGetWorksheet(year: number, month: number): Promise<WorksheetData> {