fix: SFTP标签页离开后返回刷新状态丢失问题

.opencode/plans/2026-03-30-sftp-tab-cache-fix-plan.md

@@ -0,0 +1,63 @@
+# SFTP标签页状态保持修复实施计划
+
+> **For agentic workers:** REQUIRED: Use superpowers:subagent-driven-development (if subagents available) or superpowers:executing-plans to implement this plan. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** 修复SFTP标签页离开后再返回会刷新页面、丢失浏览状态的问题
+
+**Architecture:** 为SftpView组件添加keep-alive缓存，仅缓存SFTP相关页面，最大缓存10个实例避免内存占用过高，每个路由实例通过fullPath作为唯一key区分
+
+**Tech Stack:** Vue 3、Vue Router 4、Pinia
+
+---
+
+### Task 1: 为SftpView组件添加名称标识
+**Files:**
+- Modify: `frontend/src/views/SftpView.vue`
+
+- [ ] **Step 1: 添加组件名称**
+在script setup开头添加：
+```typescript
+defineOptions({ name: 'SftpView' })
+```
+
+---
+
+### Task 2: 修改MainLayout添加keep-alive缓存
+**Files:**
+- Modify: `frontend/src/layouts/MainLayout.vue:193-195`
+
+- [ ] **Step 1: 替换原RouterView代码**
+原代码：
+```vue
+<RouterView v-slot="{ Component }">
+  <component :is="Component" v-if="!showTerminalWorkspace" />
+</RouterView>
+```
+替换为：
+```vue
+<RouterView v-slot="{ Component }">
+  <keep-alive :include="['SftpView']" :max="10">
+    <component :is="Component" v-if="!showTerminalWorkspace" :key="$route.fullPath" />
+  </keep-alive>
+</RouterView>
+```
+
+---
+
+### Task 3: 验证修复效果
+**Files:**
+- Test: 手动验证 + 构建验证
+
+- [ ] **Step 1: 运行类型检查**
+Run: `cd frontend && npm run build`
+Expected: 构建成功，无类型错误
+
+- [ ] **Step 2: 手动测试功能**
+1. 启动开发服务，登录系统
+2. 打开任意连接的SFTP标签
+3. 浏览到任意子目录
+4. 切换到其他页面（如连接列表、终端）
+5. 切回SFTP标签，确认仍停留在之前浏览的子目录，状态未丢失
+6. 打开多个不同连接的SFTP标签，切换时确认各自状态独立保存
+
+---

frontend/src/layouts/MainLayout.vue

@@ -190,8 +190,10 @@ function handleSftpTabClose(tabId: string, connectionId: number, event: Event) {
       <div v-if="keepTerminalWorkspaceMounted" v-show="showTerminalWorkspace" class="h-full">
         <TerminalWorkspaceView :visible="showTerminalWorkspace" />
       </div>
-      <RouterView v-slot="{ Component }">
-        <component :is="Component" v-if="!showTerminalWorkspace" />
+      <RouterView v-slot="{ Component }">
+        <keep-alive :include="['SftpView']" :max="10">
+          <component :is="Component" v-if="!showTerminalWorkspace" :key="$route.fullPath" />
+        </keep-alive>
       </RouterView>
     </main>
   </div>

frontend/src/views/SftpView.vue

@@ -1,4 +1,5 @@
-<script setup lang="ts">
+<script setup lang="ts">
+defineOptions({ name: 'SftpView' })
 import { ref, computed, watch, onBeforeUnmount } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 import { useToast } from 'vue-toast-notification'