fix: chart surat BigInt serialization error

Root Cause:
- PostgreSQL COUNT(*) returns BigInt (1n)
- Elysia cannot serialize BigInt to JSON
- Frontend receives error instead of data

Solution:
- Cast COUNT(*) to INTEGER in SQL query
- Changed: COUNT(*) as count
- To: COUNT(*)::INTEGER as count
- Now returns regular number instead of BigInt

Files changed:
- src/api/complaint.ts: Fixed service-trends endpoint

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

src/api/complaint.ts

@@ -123,7 +123,7 @@ export const complaint = new Elysia({
 					SELECT 
 						TO_CHAR("createdAt", 'Mon') as month,
 						EXTRACT(MONTH FROM "createdAt") as month_num,
-						COUNT(*) as count
+						COUNT(*)::INTEGER as count
 					FROM service_letter
 					WHERE "createdAt" > NOW() - INTERVAL '6 months'
 					GROUP BY month, month_num