feat(leave) : forfait mid-year entry credits prorated repos + carried CP

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/State/EmployeeLeaveSummaryProvider.php

@@ -763,6 +763,33 @@ final readonly class EmployeeLeaveSummaryProvider implements ProviderInterface
     {
         $type = $phase->contractType;
         if (ContractType::FORFAIT === $type) {
+            $year = (int) $from->format('Y'); // période forfait = année civile
+
+            // Entrée en FORFAIT en cours d'année : repos proratisés + CP nets reportés de
+            // la phase précédente, au lieu de max(0, businessDays − 218) qui donnerait 0.
+            if ($this->isForfaitEntryYear($phase, $year)) {
+                $yearStart       = new DateTimeImmutable(sprintf('%d-01-01 00:00:00', $year));
+                $yearEnd         = new DateTimeImmutable(sprintf('%d-12-31 00:00:00', $year));
+                $rawYearHolidays = $this->buildRawPublicHolidayMap($yearStart, $yearEnd);
+
+                $businessDaysYear   = $this->countBusinessDays($yearStart, $yearEnd, $rawYearHolidays);
+                $businessDaysPeriod = $this->countBusinessDays($from, $to, $rawYearHolidays);
+
+                $repoDays  = $this->computeProratedForfaitRepoDays($businessDaysYear, $businessDaysPeriod);
+                $carriedCp = $this->resolveCarriedCpFromPriorPhase($employee, $phase);
+
+                return [
+                    'ruleCode'                => LeaveRuleCode::FORFAIT_218->value,
+                    'acquiredDays'            => $repoDays + $carriedCp,
+                    'acquiredSaturdays'       => 0.0,
+                    'accrualPerMonth'         => 0.0,
+                    'saturdayAccrualPerMonth' => 0.0,
+                    'countOnlyCp'             => false,
+                    'splitSaturdays'          => false,
+                ];
+            }
+
+            // Année pleine : calcul 218 existant (INCHANGÉ).
             // Business days for forfait must use the RAW holiday list (excluded holidays like
             // "Lundi de Pentecôte" / journée de solidarité still count as non-working days for
             // the 218-day legal target).