feat: [hr] 연차잔여 탭에 재직상태 필터 추가 (전체/재직자/퇴직자)

- 필터 기본값: 재직자 (active + leave)
- 퇴직자 선택 시 resigned만 표시
- 전체 선택 시 모든 상태 표시

app/Http/Controllers/Api/Admin/HR/LeaveController.php

@@ -229,10 +229,11 @@ public function balance(Request $request): JsonResponse|Response
         $year = $request->integer('year', now()->year);
         $sort = $request->input('sort', 'hire_date');
         $direction = $request->input('direction', 'asc');
-        $balances = $this->leaveService->getBalanceSummary($year, $sort, $direction);
+        $empStatus = $request->input('emp_status');
+        $balances = $this->leaveService->getBalanceSummary($year, $sort, $direction, $empStatus);
 
         if ($request->header('HX-Request')) {
-            return response(view('hr.leaves.partials.balance', compact('balances', 'year', 'sort', 'direction')));
+            return response(view('hr.leaves.partials.balance', compact('balances', 'year', 'sort', 'direction', 'empStatus')));
         }
 
         return response()->json([