feat: [equipment] 점검항목 다른 주기로 복사 기능 추가

- 서비스: copyTemplatesToCycles 메서드 추가 (중복 항목 스킵)
- 컨트롤러: copyTemplates API 엔드포인트 추가
- UI: 다른 주기에 복사 버튼 + 체크박스 모달

resources/views/equipment/partials/tabs/inspection-items.blade.php

@@ -2,10 +2,17 @@
 <div class="bg-white rounded-lg shadow-sm p-6 mb-6">
     <div class="flex justify-between items-center mb-4 pb-2 border-b">
         <h2 class="text-lg font-semibold text-gray-800">점검항목 템플릿</h2>
-        <button onclick="document.getElementById('templateModal').classList.remove('hidden')"
-                class="bg-blue-600 hover:bg-blue-700 text-white px-3 py-1.5 rounded-lg text-sm transition">
-            + 항목 추가
-        </button>
+        <div class="flex gap-2">
+            <button onclick="openCopyModal()"
+                    class="bg-green-600 hover:bg-green-700 text-white px-3 py-1.5 rounded-lg text-sm transition"
+                    id="copyTemplateBtn" style="display: none;">
+                다른 주기에 복사
+            </button>
+            <button onclick="document.getElementById('templateModal').classList.remove('hidden')"
+                    class="bg-blue-600 hover:bg-blue-700 text-white px-3 py-1.5 rounded-lg text-sm transition">
+                + 항목 추가
+            </button>
+        </div>
     </div>
 
     @php
@@ -144,8 +151,45 @@ class="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded-lg">추가</bu
     </div>
 </div>
 
+<!-- 다른 주기에 복사 모달 -->
+<div id="copyTemplateModal" class="fixed inset-0 z-50 hidden">
+    <div class="fixed inset-0 bg-black/50" onclick="document.getElementById('copyTemplateModal').classList.add('hidden')"></div>
+    <div class="fixed inset-0 flex items-center justify-center p-4">
+        <div class="bg-white rounded-xl shadow-xl w-full max-w-md">
+            <div class="flex justify-between items-center p-6 border-b">
+                <h3 class="text-lg font-semibold">점검항목 복사</h3>
+                <button onclick="document.getElementById('copyTemplateModal').classList.add('hidden')" class="text-gray-400 hover:text-gray-600">&times;</button>
+            </div>
+            <div class="p-6">
+                <p class="text-sm text-gray-600 mb-4">
+                    <span id="copySourceLabel" class="font-semibold text-blue-700"></span> 점검항목을 선택한 주기에 복사합니다.
+                </p>
+                <div class="space-y-2 mb-6" id="copyTargetCycles">
+                    @foreach($allCycles as $code => $label)
+                        <label class="copy-cycle-option flex items-center gap-3 p-2 rounded-lg hover:bg-gray-50 cursor-pointer" data-cycle="{{ $code }}">
+                            <input type="checkbox" name="target_cycles[]" value="{{ $code }}"
+                                   class="w-4 h-4 text-blue-600 border-gray-300 rounded focus:ring-blue-500">
+                            <span class="text-sm text-gray-700">{{ $label }}</span>
+                            <span class="copy-cycle-count text-xs text-gray-400 ml-auto"></span>
+                        </label>
+                    @endforeach
+                </div>
+                <div class="flex justify-end gap-3">
+                    <button type="button" onclick="document.getElementById('copyTemplateModal').classList.add('hidden')"
+                            class="bg-gray-200 hover:bg-gray-300 text-gray-800 px-4 py-2 rounded-lg text-sm">취소</button>
+                    <button type="button" onclick="executeCopyTemplates()"
+                            class="bg-green-600 hover:bg-green-700 text-white px-4 py-2 rounded-lg text-sm" id="copyExecuteBtn">복사</button>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+
 <script>
+let currentTemplateTab = 'daily';
+
 function switchTemplateTab(cycle) {
+    currentTemplateTab = cycle;
     document.querySelectorAll('.tmpl-cycle-tab').forEach(btn => {
         if (btn.dataset.cycle === cycle) {
             btn.className = 'tmpl-cycle-tab px-3 py-1.5 rounded-md text-xs font-medium transition bg-white text-blue-700 shadow-sm';
@@ -156,8 +200,80 @@ function switchTemplateTab(cycle) {
     document.querySelectorAll('.tmpl-cycle-content').forEach(el => {
         el.classList.toggle('hidden', el.dataset.cycle !== cycle);
     });
-    // 모달의 주기 기본값도 전환
     const cycleSelect = document.getElementById('tmplInspectionCycle');
     if (cycleSelect) cycleSelect.value = cycle;
+    updateCopyButton();
 }
+
+function updateCopyButton() {
+    const btn = document.getElementById('copyTemplateBtn');
+    const content = document.querySelector(`.tmpl-cycle-content[data-cycle="${currentTemplateTab}"]`);
+    const hasItems = content && content.querySelector('table');
+    btn.style.display = hasItems ? '' : 'none';
+}
+
+function openCopyModal() {
+    const cycleLabels = @json($allCycles);
+    document.getElementById('copySourceLabel').textContent = cycleLabels[currentTemplateTab];
+
+    document.querySelectorAll('.copy-cycle-option').forEach(el => {
+        const code = el.dataset.cycle;
+        const checkbox = el.querySelector('input[type="checkbox"]');
+        if (code === currentTemplateTab) {
+            el.style.display = 'none';
+            checkbox.checked = false;
+        } else {
+            el.style.display = '';
+            checkbox.checked = false;
+            const countEl = el.querySelector('.copy-cycle-count');
+            const tab = document.querySelector(`.tmpl-cycle-tab[data-cycle="${code}"]`);
+            const badge = tab ? tab.querySelector('span') : null;
+            countEl.textContent = badge ? `${badge.textContent.trim()}개 항목` : '';
+        }
+    });
+
+    document.getElementById('copyTemplateModal').classList.remove('hidden');
+}
+
+function executeCopyTemplates() {
+    const checked = document.querySelectorAll('#copyTargetCycles input[type="checkbox"]:checked');
+    if (checked.length === 0) {
+        alert('복사할 주기를 선택해주세요.');
+        return;
+    }
+
+    const targetCycles = Array.from(checked).map(cb => cb.value);
+    const equipmentId = @json($equipment->id);
+    const btn = document.getElementById('copyExecuteBtn');
+    btn.disabled = true;
+    btn.textContent = '복사 중...';
+
+    fetch(`/api/admin/equipment/${equipmentId}/templates/copy`, {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/json',
+            'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').content,
+        },
+        body: JSON.stringify({
+            source_cycle: currentTemplateTab,
+            target_cycles: targetCycles,
+        }),
+    })
+    .then(res => res.json())
+    .then(data => {
+        if (data.success) {
+            alert(data.message);
+            location.reload();
+        } else {
+            alert(data.message || '복사 실패');
+        }
+    })
+    .catch(() => alert('오류가 발생했습니다.'))
+    .finally(() => {
+        btn.disabled = false;
+        btn.textContent = '복사';
+    });
+}
+
+document.addEventListener('DOMContentLoaded', () => updateCopyButton());
 </script>