feat: add district filter (Hiraa/AsSaffiyah) from static mapping

- ETL writes District column to NocoDB DailySales
- Museums mapped: Hiraa (Revelation, Holy Quraan, Trail, Makkah, VIP)
  AsSaffiyah (Creation Story, Best of Creation)
- District filter added to Dashboard and Comparison (cascades to museum)
- District Performance chart added (desktop + mobile)
- Locale keys added for both EN and AR

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/types.ts

@@ -18,6 +18,7 @@ export interface ERPSaleRecord {
 
 export interface AggregatedRecord {
   Date: string;
+  District: string;
   MuseumName: string;
   Channel: string;
   TicketType: 'single' | 'combo';