feat: migrate museum sales from NocoDB to Hono ERP API

- Replace NocoDB museum data (Districts/Museums/DailyStats) with ERP API
- Client fetches via server proxy (/api/erp/sales) — no credentials in browser
- Aggregate transaction-level ERP data into daily/museum/channel records
- Replace "district" dimension with "channel" (B2C/HiHala, POS, B2B, etc.)
- Add product-to-museum mapping (46 products → 6 museums)
- NocoDB retained only for PilgrimStats
- Remove old server/index.js (replaced by modular TS in server/src/)
- Update all components, types, and locale files

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

src/locales/en.json

@@ -33,11 +33,11 @@
   "filters": {
     "title": "Filters",
     "year": "Year",
-    "district": "District",
+    "channel": "Channel",
     "museum": "Museum",
     "quarter": "Quarter",
     "allYears": "All Years",
-    "allDistricts": "All Districts",
+    "allChannels": "All Channels",
     "allMuseums": "All Museums",
     "allQuarters": "All Quarters",
     "reset": "Reset Filters"
@@ -56,7 +56,7 @@
   },
   "dashboard": {
     "title": "Dashboard",
-    "subtitle": "Museum analytics from VivaTicket Sales Reports",
+    "subtitle": "Museum analytics from Hono ERP",
     "noData": "No data found",
     "noDataMessage": "No records match your current filters. Try adjusting your selection.",
     "quarterlyComparison": "Quarterly Comparison: 2024 vs 2025",
@@ -64,7 +64,7 @@
     "visitorsByMuseum": "Visitors by Museum",
     "revenueByMuseum": "Revenue by Museum",
     "quarterlyRevenue": "Quarterly Revenue (YoY)",
-    "districtPerformance": "District Performance",
+    "channelPerformance": "Channel Performance",
     "captureRateChart": "Capture Rate vs Umrah Pilgrims"
   },
   "table": {
@@ -146,11 +146,11 @@
     "visitors": "Visitors",
     "revenue": "Revenue",
     "quarterly": "Quarterly",
-    "district": "District",
+    "channel": "Channel",
     "captureRate": "Capture Rate"
   },
   "errors": {
-    "config": "The dashboard is not configured. Please set up the NocoDB connection.",
+    "config": "The dashboard is not configured. Please set up the ERP API connection.",
     "network": "Cannot reach the database server. Please check your internet connection.",
     "auth": "Access denied. The API token may be invalid or expired.",
     "timeout": "The database server is taking too long to respond. Please try again.",