feat: 脚本管理页面（类似青龙面板）

- 新增脚本管理页面，左右分栏布局
- 集成 Monaco Editor 代码编辑器（语法高亮、行号、快捷键）
- 支持脚本 CRUD、运行、复制等操作
- 定时任务支持从脚本库导入脚本
- 新增 platform_scripts 表存储脚本

frontend/src/views/scheduled-tasks/index.vue

@@ -48,6 +48,11 @@ const form = reactive({
 const templateList = ref([])
 const templateDialogVisible = ref(false)
 
+// 脚本库
+const scriptLibList = ref([])
+const scriptLibDialogVisible = ref(false)
+const scriptLibLoading = ref(false)
+
 // 版本
 const versionsDialogVisible = ref(false)
 const versionsLoading = ref(false)
@@ -433,6 +438,33 @@ function applyTemplate(template) {
   ElMessage.success(`已应用模板：${template.name}`)
 }
 
+// ============ 脚本库功能 ============
+async function handleSelectFromScriptLib() {
+  scriptLibLoading.value = true
+  scriptLibDialogVisible.value = true
+  
+  try {
+    const res = await api.get('/api/scripts', { params: { size: 100 } })
+    scriptLibList.value = res.data.items || []
+  } catch (e) {
+    console.error('获取脚本库失败:', e)
+  } finally {
+    scriptLibLoading.value = false
+  }
+}
+
+async function applyScriptFromLib(script) {
+  try {
+    // 获取脚本完整内容
+    const res = await api.get(`/api/scripts/${script.id}`)
+    form.script_content = res.data.script_content || ''
+    scriptLibDialogVisible.value = false
+    ElMessage.success(`已导入脚本：${script.name}`)
+  } catch (e) {
+    console.error(e)
+  }
+}
+
 // ============ 版本功能 ============
 async function handleViewVersions(row) {
   currentVersionTaskId.value = row.id
@@ -739,11 +771,14 @@ onMounted(() => {
             <div class="script-editor-header">
               <div>
                 <el-button type="primary" link size="small" @click="handleShowSdkDocs">
-                  查看 SDK 文档
+                  SDK 文档
                 </el-button>
                 <el-button type="warning" link size="small" @click="handleSelectTemplate">
                   选择模板
                 </el-button>
+                <el-button type="success" link size="small" @click="handleSelectFromScriptLib">
+                  从脚本库导入
+                </el-button>
               </div>
               <el-button 
                 type="success" 
@@ -929,6 +964,46 @@ log('执行完成')"
       </template>
     </el-dialog>
     
+    <!-- 脚本库选择对话框 -->
+    <el-dialog v-model="scriptLibDialogVisible" title="从脚本库导入" width="700px">
+      <div v-loading="scriptLibLoading">
+        <div v-if="scriptLibList.length === 0 && !scriptLibLoading" class="empty-tip">
+          暂无脚本，请先在「脚本管理」页面创建
+        </div>
+        <div v-else class="script-lib-list">
+          <div 
+            v-for="script in scriptLibList" 
+            :key="script.id" 
+            class="script-lib-item"
+            @click="applyScriptFromLib(script)"
+          >
+            <div class="script-lib-header">
+              <span class="script-lib-name">{{ script.name }}</span>
+              <el-tag v-if="script.category" size="small" type="info">{{ script.category }}</el-tag>
+              <el-tag 
+                v-if="script.last_run_status" 
+                size="small" 
+                :type="script.last_run_status === 'success' ? 'success' : 'danger'"
+              >
+                {{ script.last_run_status }}
+              </el-tag>
+            </div>
+            <div class="script-lib-desc">{{ script.description || '暂无描述' }}</div>
+            <div class="script-lib-meta">
+              <span>{{ script.filename }}</span>
+              <span v-if="script.content_length">{{ script.content_length }} 字符</span>
+            </div>
+          </div>
+        </div>
+      </div>
+      <template #footer>
+        <el-button @click="scriptLibDialogVisible = false">取消</el-button>
+        <el-button type="primary" @click="$router.push('/scripts')">
+          管理脚本库
+        </el-button>
+      </template>
+    </el-dialog>
+
     <!-- 版本管理对话框 -->
     <el-dialog v-model="versionsDialogVisible" title="脚本版本历史" width="700px">
       <el-table v-loading="versionsLoading" :data="versionsList" style="width: 100%">
@@ -1206,6 +1281,51 @@ log('执行完成')"
   padding: 40px 0;
 }
 
+/* 脚本库列表 */
+.script-lib-list {
+  max-height: 450px;
+  overflow-y: auto;
+}
+
+.script-lib-item {
+  padding: 12px 16px;
+  border: 1px solid #e4e7ed;
+  border-radius: 8px;
+  margin-bottom: 8px;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.script-lib-item:hover {
+  border-color: #67c23a;
+  background: #f0f9eb;
+}
+
+.script-lib-header {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-bottom: 6px;
+}
+
+.script-lib-name {
+  font-weight: 600;
+  color: #303133;
+}
+
+.script-lib-desc {
+  font-size: 12px;
+  color: #606266;
+  margin-bottom: 6px;
+}
+
+.script-lib-meta {
+  display: flex;
+  gap: 16px;
+  font-size: 11px;
+  color: #909399;
+}
+
 /* 统计 */
 .stats-grid {
   display: grid;