feat(leave) : show presence days in header for non-forfait, bound to contract start

Non-forfait header now shows '{weeklyHours} heures ({presence} présence)'.
Presence (presenceDaysByMonth/presenceDaysToToday) is bounded to the employee's
contract start so business days before hire are not counted (Dylan CDD: 43.5,
was 246). No change for employees present before the exercise or for forfait
(already capped at phase start). Leave summary now eager-loaded for any employee
with a leave tab to feed the header.

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

src/State/EmployeeLeaveSummaryProvider.php

@@ -148,25 +148,31 @@ final readonly class EmployeeLeaveSummaryProvider implements ProviderInterface
             );
         }
 
+        // La présence est bornée au début de contrat de l'employé : on ne compte pas comme
+        // « présents » les jours ouvrés antérieurs à l'embauche (cas d'une entrée en cours
+        // d'exercice, ex. CDD). Sans effet pour un employé présent depuis avant l'exercice,
+        // ni pour le forfait (déjà capé au début de phase).
+        $presenceFrom = $this->resolveEarliestContractStartWithinRange($employee, $periodFrom, $periodTo) ?? $periodFrom;
+
         // Forfait-only: leaves taken from N-1 stock do NOT decrement presence days.
         // For non-forfait, previousYearTakenDays is always 0, so the budget has no effect.
         $n1AbsencesBudget             = $yearSummary['previousYearTakenDays'];
         $summary->presenceDaysByMonth = $this->computePresenceDaysByMonth(
             $employee,
-            $periodFrom,
+            $presenceFrom,
             $periodTo,
             $n1AbsencesBudget
         );
 
         // Same logic as presenceDaysByMonth but bounded at today: number of presence days
-        // accumulated from leave year start up to today (inclusive).
+        // accumulated from contract start up to today (inclusive).
         $today                        = new DateTimeImmutable('today');
         $cappedTo                     = $today < $periodTo ? $today : $periodTo;
-        $summary->presenceDaysToToday = $today < $periodFrom
+        $summary->presenceDaysToToday = $today < $presenceFrom
             ? 0.0
             : array_sum($this->computePresenceDaysByMonth(
                 $employee,
-                $periodFrom,
+                $presenceFrom,
                 $cappedTo,
                 $n1AbsencesBudget
             ));