update expense-claims

backend/prisma/schema.prisma

@@ -302,8 +302,8 @@ model Leave {
   employeeId    String
   employee      Employee @relation(fields: [employeeId], references: [id])
   leaveType     String   // ANNUAL, SICK, UNPAID, EMERGENCY, etc.
-  startDate     DateTime @db.Date
-  endDate       DateTime @db.Date
+  startDate     DateTime @db.Timestamp(3)
+  endDate       DateTime @db.Timestamp(3)
   days          Int
   reason        String?
   status        String   @default("PENDING") // PENDING, APPROVED, REJECTED
@@ -523,6 +523,7 @@ model ExpenseClaim {
   approvedBy      String?
   approvedAt      DateTime?
   rejectedReason  String?
+  approvalNote    String?
 
   createdAt       DateTime  @default(now())
   updatedAt       DateTime  @updatedAt