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/package.json

@@ -11,7 +11,8 @@
   "dependencies": {
     "lucide-react": "^0.468.0",
     "react": "^18.3.1",
-    "react-dom": "^18.3.1"
+    "react-dom": "^18.3.1",
+    "recharts": "^3.9.2"
   },
   "devDependencies": {
     "@types/react": "^18.3.1",