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/services/etlSync.ts

@@ -1,6 +1,6 @@
 import { fetchSales } from './erpClient';
 import { discoverTableIds, deleteRowsByMonth, deleteAllRows, insertRecords } from './nocodbClient';
-import { getMuseumsFromProduct, getChannelLabel } from '../config/museumMapping';
+import { getMuseumsFromProduct, getChannelLabel, getDistrict } from '../config/museumMapping';
 import type { ERPSaleRecord, AggregatedRecord } from '../types';
 
 function generateMonthBoundaries(startYear: number, startMonth: number): Array<[string, string]> {
@@ -51,12 +51,14 @@ export function aggregateTransactions(sales: ERPSaleRecord[]): AggregatedRecord[
           ? museums.filter(m => m !== museum).join(', ')
           : '';
         const ticketType = isCombo ? 'combo' : 'single';
+        const district = getDistrict(museum);
         const key = `${date}|${museum}|${channel}|${ticketType}`;
 
         let entry = map.get(key);
         if (!entry) {
           entry = {
             Date: date,
+            District: district,
             MuseumName: museum,
             Channel: channel,
             TicketType: ticketType,