fix: monthly cards and table show same +/- using prorated fund for current month

Backend: per-user missing/overtime in current month now calculated
against bizDaysToDate (working days up to today), not full month.

Frontend: monthly card percentage and fulfilled check also use
fund_to_date for current month.

Now both the yearly summary table and the monthly cards agree.

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

src/services/attendance.service.ts

@@ -406,7 +406,7 @@ export async function getWorkfund(year: number) {
         }
       }
 
-      const userFund = Math.max(0, (bizDays - holidayDays) * 8);
+      const userFund = Math.max(0, (bizDaysToDate - holidayDays) * 8);
       const workedRound = Math.round(worked * 10) / 10;
       const leaveHours = vacationHours + sickHours;
       const covered = Math.round((worked + leaveHours) * 10) / 10;