diff --git a/CLAUDE.md b/CLAUDE.md
index 28629e8..b3c90a1 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -248,15 +248,70 @@ PDMS: {
 }
 ```
 
-## API接入流程
+## API接入流程（实战总结）
 
-今后新增CAD软件API的标准流程：
+**经验教训**：Store只管理状态，API调用在组件中执行，通知统一处理。
 
-1. **配置定义**: 在 `src/config/cad.js` 中添加软件配置
-2. **创建API服务**: 在 `src/services/` 中创建对应API文件
-3. **Store集成**: 在 `src/stores/cad.js` 中添加调用逻辑
+### 🔧 标准接入步骤
 
-所有API请求通过 `apiClient.js` 统一处理，自动获得日志记录和通知功能。
+1. **API服务层**（`src/services/xxxApi.js`）
+```javascript
+// 扩展现有API服务或新建
+async getCurrentModel() {
+  const url = buildApiUrl(this.softwareName, 'status')
+  return await apiClient.get(url, {
+    operationContext: {
+      software: 'Creo',           // 软件名
+      operation: '获取当前模型'    // 具体操作（用于通知）
+    }
+  })
+}
+```
+
+2. **Store状态管理**（`src/stores/cad.js`）
+```javascript
+// 只管理状态，不执行API调用
+const setCADConnection = (cadName, connected) => {
+  // 一次只能连接一个CAD
+  cadConnections.value.forEach(cad => cad.connected = false)
+  const targetCAD = getCADConnection(cadName)
+  if (targetCAD) targetCAD.connected = connected
+}
+```
+
+3. **组件中调用**（`src/components/xxx.vue`）
+```javascript
+// 组件负责API调用和状态更新
+const handleOperation = async () => {
+  const result = await creoApi.getCurrentModel()
+  // 通知自动显示，无需手动处理
+  // 根据需要更新状态
+  if (result.success) {
+    cadStore.setCADConnection('creo', true)
+  }
+}
+```
+
+### ⚠️ 关键避坑指南
+
+**❌ 常见错误**：
+- Store中执行API调用（职责混乱）
+- 组件中手动处理成功/失败通知（重复工作）
+- Store管理临时查询结果（不是状态）
+- 允许多个CAD同时连接（违反业务逻辑）
+
+**✅ 正确做法**：
+- Store纯状态管理：`cadConnections`、`setCADConnection()`
+- 组件执行业务：API调用、用户交互、状态更新
+- 通知自动化：`apiClient.js`统一处理成功/失败通知
+- 一次一连接：连接新CAD时自动断开其他
+
+### 🎯 核心原则
+
+- **职责分离**：Store管状态，组件调API
+- **通知统一**：`operationContext`自动生成通知
+- **状态约束**：业务规则在状态管理中体现
+- **错误暴露**：不用try-catch，让错误直接暴露
 
 ## 日志系统扩展
 
diff --git a/src/components/layout/CadSidebar.vue b/src/components/layout/CadSidebar.vue
index 8433441..59a05b2 100644
--- a/src/components/layout/CadSidebar.vue
+++ b/src/components/layout/CadSidebar.vue
@@ -50,7 +50,7 @@
             </label>
           </div>
           <div class="project-actions">
-            <button class="confirm-btn">
+            <button class="confirm-btn" @click="handleOpenModel">
               <i class="fas fa-folder-open"></i>
               打开模型
             </button>
@@ -65,6 +65,7 @@
 import { ref, computed } from 'vue'
 import { useCADStore } from '@/stores/cad'
 import CadSoftwareGrid from '@/components/ui/CadSoftwareGrid.vue'
+import creoApi from '@/services/creoApi'
 
 const cadStore = useCADStore()
 
@@ -92,9 +93,44 @@ const selectSoftware = (software) => {
 // }
 
 // 测试连接
-const testConnection = (software) => {
-  // 调用CAD store的连接测试方法
-  cadStore.toggleCADConnection(software)
+const testConnection = async (software) => {
+  // 设置连接中状态
+  cadStore.setCADConnecting(software, true)
+
+  // 目前只支持Creo
+  if (software === 'creo' || software === 'Creo') {
+    const result = await creoApi.testConnection()
+    cadStore.setCADConnection(software, result.success)
+  } else {
+    // 其他软件暂不支持
+    cadStore.setCADConnection(software, false)
+  }
+
+  cadStore.setCADConnecting(software, false)
+}
+
+// 处理打开模型
+const handleOpenModel = async () => {
+  const connectedCAD = cadStore.currentCAD
+  if (!connectedCAD) {
+    return
+  }
+
+  // 获取选中的模型来源选项
+  const selectedOption = document.querySelector('input[name="project-source"]:checked')?.value
+
+  if (selectedOption === 'current-project') {
+    // 查看当前模型
+    if (connectedCAD.id === 'creo') {
+      await creoApi.getCurrentModel()
+    }
+  } else {
+    // 打开文件
+    const filePath = prompt('请输入模型文件路径:')
+    if (filePath && connectedCAD.id === 'creo') {
+      await creoApi.openModelFile(filePath)
+    }
+  }
 }
 </script>
 
diff --git a/src/services/apiClient.js b/src/services/apiClient.js
index e1196d5..5ac47ea 100644
--- a/src/services/apiClient.js
+++ b/src/services/apiClient.js
@@ -185,6 +185,9 @@ class ApiClient {
 
     // 记录错误日志
     ApiLogger.log(context.method, context.url, context.requestData, errorResponse, duration)
+
+    // 执行后处理钩子（显示失败通知）
+    await PostProcessManager.process(errorResponse, { ...context, duration })
   }
 
   // 便捷方法
diff --git a/src/services/creoApi.js b/src/services/creoApi.js
index dc7d492..49480b3 100644
--- a/src/services/creoApi.js
+++ b/src/services/creoApi.js
@@ -11,7 +11,7 @@ class CreoApiService {
   }
 
   /**
-   * 测试Creo连接 - 唯一实现的功能
+   * 测试Creo连接
    * @returns {Promise<{success: boolean, data?: any, error?: string}>}
    */
   async testConnection() {
@@ -26,6 +26,39 @@ class CreoApiService {
       }
     })
   }
+
+  /**
+   * 获取当前模型状态
+   * @returns {Promise<{success: boolean, data?: any, error?: string}>}
+   */
+  async getCurrentModel() {
+    const url = buildApiUrl(this.softwareName, 'status')
+
+    return await apiClient.get(url, {
+      operationContext: {
+        software: 'Creo',
+        operation: '获取当前模型'
+      }
+    })
+  }
+
+  /**
+   * 打开模型文件
+   * @param {string} filePath - 模型文件路径
+   * @returns {Promise<{success: boolean, data?: any, error?: string}>}
+   */
+  async openModelFile(filePath) {
+    const url = buildApiUrl(this.softwareName, 'open')
+
+    return await apiClient.post(url, {
+      filePath: filePath
+    }, {
+      operationContext: {
+        software: 'Creo',
+        operation: '打开模型文件'
+      }
+    })
+  }
 }
 
 // 导出单例实例
diff --git a/src/stores/cad.js b/src/stores/cad.js
index a9c8720..8bd7e34 100644
--- a/src/stores/cad.js
+++ b/src/stores/cad.js
@@ -1,33 +1,7 @@
 import { defineStore } from 'pinia'
 import { ref, computed } from 'vue'
 import { getAllCADDefinitions, getDisplayableCADs } from '@/config/cad'
-import creoApi from '@/services/creoApi'
 
-// CAD存储常量配置
-const CAD_CONFIG = {
-  // 延时设置（毫秒）
-  CONNECTION_TIMEOUT: 1500,
-  MODEL_OPEN_TIMEOUT: 1000,
-  MODEL_EXPORT_TIMEOUT: 2000,
-  MODEL_REFRESH_TIMEOUT: 500,
-
-  // 时间计算（毫秒）
-  TIME_INTERVALS: {
-    MINUTES_30: 30 * 60 * 1000,
-    HOURS_2: 2 * 60 * 60 * 1000,
-    HOURS_24: 24 * 60 * 60 * 1000
-  },
-
-  // 默认文件大小
-  DEFAULT_FILE_SIZES: {
-    MECHANISM: '5.2MB',
-    GEAR: '1.2MB',
-    HOUSING: '3.8MB'
-  },
-
-  // 默认版本
-  DEFAULT_MODEL_VERSION: 'V1.0'
-}
 
 export const useCADStore = defineStore('cad', () => {
   // 从配置生成CAD软件连接状态
@@ -57,49 +31,6 @@ export const useCADStore = defineStore('cad', () => {
     return cadConnections.value.find(cad => cad.connected)
   })
 
-  // 已打开的模型列表
-  const openedModels = ref([
-    {
-      id: 1,
-      title: '机械装配体',
-      name: 'mechanism.asm',
-      version: 'V1.2',
-      source: 'SolidWorks',
-      openTime: new Date(Date.now() - CAD_CONFIG.TIME_INTERVALS.MINUTES_30),
-      size: CAD_CONFIG.DEFAULT_FILE_SIZES.MECHANISM,
-      path: '/models/mechanism.asm'
-    },
-    {
-      id: 2,
-      title: '齿轮零件',
-      name: 'gear.prt',
-      version: 'V2.0',
-      source: 'AutoCAD',
-      openTime: new Date(Date.now() - CAD_CONFIG.TIME_INTERVALS.HOURS_2),
-      size: CAD_CONFIG.DEFAULT_FILE_SIZES.GEAR,
-      path: '/models/gear.prt'
-    },
-    {
-      id: 3,
-      title: '外壳设计',
-      name: 'housing.prt',
-      version: 'V1.5',
-      source: 'Creo',
-      openTime: new Date(Date.now() - CAD_CONFIG.TIME_INTERVALS.HOURS_24),
-      size: CAD_CONFIG.DEFAULT_FILE_SIZES.HOUSING,
-      path: '/models/housing.prt'
-    }
-  ])
-
-  // 当前选中的模型
-  const selectedModel = ref(null)
-
-  // 模型操作状态
-  const modelOperations = ref({
-    isOpening: false,
-    isViewing: false,
-    isExporting: false
-  })
 
   // 获取可显示的CAD列表（根据显示模式）
   const displayableCADs = computed(() => {
@@ -122,184 +53,45 @@ export const useCADStore = defineStore('cad', () => {
     return cad ? cad.features.includes(feature) : false
   }
 
-  // 连接/断开CAD软件
-  const toggleCADConnection = async (cadName) => {
-    const cad = getCADConnection(cadName)
-    if (!cad || cad.connecting) return
-
-    // 设置连接中状态
-    cad.connecting = true
-
-    try {
-      // 只对Creo实现真实连接，其他软件不支持
-      if (cadName === 'creo' || cadName === 'Creo') {
-        const result = await creoApi.testConnection()
-
-        if (result.success) {
-          cad.connected = true
-          cad.lastConnected = new Date()
-        } else {
-          cad.connected = false
-          cad.lastConnected = null
-        }
-
-        return { success: result.success, connected: cad.connected, error: result.error }
-
-      } else {
-        // 其他软件直接返回不支持
-        return { success: false, error: `${cadName} 连接功能暂未实现` }
-      }
-
-    } catch (error) {
-      return { success: false, error: error.message }
-    } finally {
+  // 设置CAD连接状态（一次只能连接一个）
+  const setCADConnection = (cadName, connected) => {
+    // 先断开所有连接
+    cadConnections.value.forEach(cad => {
+      cad.connected = false
       cad.connecting = false
-    }
-  }
-
-  // 打开模型
-  const openModel = async (modelData) => {
-    modelOperations.value.isOpening = true
-    
-    try {
-      // 检查是否有对应的CAD连接
-      const sourceCAD = getCADConnection(modelData.source)
-      if (!sourceCAD || !sourceCAD.connected) {
-        throw new Error(`请先连接 ${modelData.source}`)
+      if (!connected) {
+        cad.lastConnected = null
       }
-
-      // 模拟打开过程
-      await new Promise(resolve => setTimeout(resolve, CAD_CONFIG.MODEL_OPEN_TIMEOUT))
-      
-      // 添加新模型
-      const newModel = {
-        id: Date.now(),
-        title: modelData.title || modelData.name,
-        name: modelData.name,
-        version: modelData.version || CAD_CONFIG.DEFAULT_MODEL_VERSION,
-        source: modelData.source,
-        openTime: new Date(),
-        size: modelData.size || '0MB',
-        path: modelData.path || ''
-      }
-      
-      openedModels.value.unshift(newModel)
-      
-      return { success: true, model: newModel }
-    } catch (error) {
-      return { success: false, error: error.message }
-    } finally {
-      modelOperations.value.isOpening = false
-    }
-  }
-
-  // 关闭模型
-  const closeModel = (modelId) => {
-    const index = openedModels.value.findIndex(m => m.id === modelId)
-    if (index > -1) {
-      const closedModel = openedModels.value[index]
-      openedModels.value.splice(index, 1)
-      
-      // 清除选中状态
-      if (selectedModel.value?.id === modelId) {
-        selectedModel.value = null
-      }
-      
-      return { success: true, model: closedModel }
-    }
-    return { success: false, error: '模型未找到' }
-  }
-
-  // 选择模型
-  const selectModel = (modelId) => {
-    const model = openedModels.value.find(m => m.id === modelId)
-    selectedModel.value = model || null
-    return selectedModel.value
-  }
-
-  // 获取模型列表
-  const getModelsBySource = (source) => {
-    return openedModels.value.filter(model => model.source === source)
-  }
-
-  // 导出模型
-  const exportModel = async (modelId, format = 'step') => {
-    modelOperations.value.isExporting = true
-    
-    try {
-      const model = openedModels.value.find(m => m.id === modelId)
-      if (!model) {
-        throw new Error('模型未找到')
-      }
-
-      // 模拟导出过程
-      await new Promise(resolve => setTimeout(resolve, CAD_CONFIG.MODEL_EXPORT_TIMEOUT))
-      
-      return { 
-        success: true, 
-        model,
-        exportPath: `/exports/${model.name}.${format}`
-      }
-    } catch (error) {
-      return { success: false, error: error.message }
-    } finally {
-      modelOperations.value.isExporting = false
-    }
-  }
-
-  // 刷新模型列表
-  const refreshModels = async () => {
-    // 模拟刷新过程
-    await new Promise(resolve => setTimeout(resolve, CAD_CONFIG.MODEL_REFRESH_TIMEOUT))
-    
-    // 更新时间显示
-    openedModels.value.forEach(() => {
-      // 保持原有时间，只是触发界面更新
     })
-    
-    return { success: true }
+
+    // 设置指定CAD的连接状态
+    const targetCAD = getCADConnection(cadName)
+    if (targetCAD) {
+      targetCAD.connected = connected
+      if (connected) {
+        targetCAD.lastConnected = new Date()
+      }
+    }
   }
 
-  // 获取统计信息
-  const getStatistics = computed(() => {
-    const totalModels = openedModels.value.length
-    const bySource = {}
-    
-    openedModels.value.forEach(model => {
-      if (!bySource[model.source]) {
-        bySource[model.source] = 0
-      }
-      bySource[model.source]++
-    })
-    
-    return {
-      totalModels,
-      bySource,
-      connectedCADs: cadConnections.value.filter(cad => cad.connected).length
+  // 设置CAD连接中状态
+  const setCADConnecting = (cadName, connecting) => {
+    const cad = getCADConnection(cadName)
+    if (cad) {
+      cad.connecting = connecting
     }
-  })
+  }
 
   return {
     // 状态
     cadConnections,
-    openedModels,
-    selectedModel,
     currentCAD,
-    modelOperations,
-    getStatistics,
-
-    // 配置驱动的计算属性
     displayableCADs,
 
     // 方法
     getCADConnection,
     cadSupportsFeature,
-    toggleCADConnection,
-    openModel,
-    closeModel,
-    selectModel,
-    getModelsBySource,
-    exportModel,
-    refreshModels
+    setCADConnection,
+    setCADConnecting
   }
 })
\ No newline at end of file