fix: [leave] 근속 기간 표시 형식 개선

- 소수점 float 대신 "1년 3개월", "2개월" 형태로 표시
- 1개월 미만인 경우 "1개월 미만" 표시

resources/views/hr/leaves/partials/balance.blade.php

@@ -21,7 +21,13 @@
                 $displayName = $employee?->display_name ?? $balance->user?->name ?? '-';
                 $department = $employee?->department;
                 $hireDate = $employee?->hire_date;
-                $yearsWorked = $hireDate ? \Carbon\Carbon::parse($hireDate)->diffInYears(now()) : null;
+                $tenureParts = null;
+                if ($hireDate) {
+                    $hire = \Carbon\Carbon::parse($hireDate);
+                    $tenureYears = (int) $hire->diffInYears(now());
+                    $tenureMonths = (int) $hire->copy()->addYears($tenureYears)->diffInMonths(now());
+                    $tenureParts = ['years' => $tenureYears, 'months' => $tenureMonths];
+                }
                 $remaining = $balance->total_days - $balance->used_days;
                 $rate = $balance->total_days > 0 ? round(($balance->used_days / $balance->total_days) * 100) : 0;
                 $barColor = $rate >= 90 ? 'bg-red-500' : ($rate >= 70 ? 'bg-amber-500' : 'bg-blue-500');
@@ -49,8 +55,16 @@
 
                 {{-- 근속 --}}
                 <td class="px-6 py-4 whitespace-nowrap text-center text-sm text-gray-700">
-                    @if($yearsWorked !== null)
-                        {{ $yearsWorked }}년
+                    @if($tenureParts !== null)
+                        @if($tenureParts['years'] > 0 && $tenureParts['months'] > 0)
+                            {{ $tenureParts['years'] }}년 {{ $tenureParts['months'] }}개월
+                        @elseif($tenureParts['years'] > 0)
+                            {{ $tenureParts['years'] }}년
+                        @elseif($tenureParts['months'] > 0)
+                            {{ $tenureParts['months'] }}개월
+                        @else
+                            1개월 미만
+                        @endif
                     @else
                         -
                     @endif