fix(frontend): 修复合并审阅发现的构建与契约问题

恢复 Vue TypeScript 生产构建，补齐可运行页面壳子，并修复文件树与 SSE 状态问题。

按 FastAPI Wire Contract 统一 Service DTO 映射，同时补充前端开发说明和问题修复复盘。

frontend/src/features/workspace/FileTreeNode.vue

@@ -0,0 +1,31 @@
+<script setup lang="ts">
+import type { FileNode } from '@/contracts'
+
+defineProps<{ node: FileNode; activePath: string | null }>()
+const emit = defineEmits<{
+  open: [node: FileNode]
+  contextMenu: [event: MouseEvent, node: FileNode]
+}>()
+</script>
+
+<template>
+  <div>
+    <div class="tree-node" :class="{ active: node.path === activePath }"
+      @click="emit('open', node)" @contextmenu="emit('contextMenu', $event, node)">
+      <span>{{ node.type === 'folder' ? (node.is_open ? '📂' : '📁') : '📄' }}</span>
+      <span class="name">{{ node.name }}</span>
+      <span v-if="node.is_dirty">●</span>
+    </div>
+    <div v-if="node.type === 'folder' && node.is_open" class="children">
+      <FileTreeNode v-for="child in node.children ?? []" :key="child.id" :node="child" :active-path="activePath"
+        @open="emit('open', $event)" @context-menu="(event, target) => emit('contextMenu', event, target)" />
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.tree-node { display: flex; align-items: center; gap: var(--space-xs); min-height: 28px; padding: 0 var(--space-sm); border-radius: var(--radius-sm); cursor: pointer; }
+.tree-node:hover, .tree-node.active { background: var(--color-background-secondary); }
+.name { min-width: 0; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.children { padding-left: var(--space-md); }
+</style>

frontend/src/features/workspace/FileTreePanel.vue

@@ -1,406 +1,117 @@
 <script setup lang="ts">
 import { ref } from 'vue'
-import { useWorkspaceStore } from '@/stores/workspace'
-import { useEditorStore } from '@/stores/editor'
 import { useRouter } from 'vue-router'
 import type { FileNode } from '@/contracts'
 import * as workspaceService from '@/services/workspaceService'
+import { useEditorStore } from '@/stores/editor'
+import { useWorkspaceStore } from '@/stores/workspace'
+import FileTreeNode from './FileTreeNode.vue'
 
 const workspaceStore = useWorkspaceStore()
 const editorStore = useEditorStore()
 const router = useRouter()
+const newItemType = ref<'file' | 'folder' | null>(null)
+const newItemName = ref('')
+const parentPath = ref('/')
+const contextTarget = ref<FileNode | null>(null)
+const contextMenuPosition = ref({ x: 0, y: 0 })
 
-const showNewMenu = ref(false)
-const newFileName = ref('')
-const newFolderName = ref('')
-const newFileParentPath = ref('')
-const showNewFileInput = ref(false)
-const showNewFolderInput = ref(false)
-const contextMenuPath = ref<string | null>(null)
-const showContextMenu = ref(false)
-const contextMenuPos = ref({ x: 0, y: 0 })
-const renamingPath = ref<string | null>(null)
-const renameValue = ref('')
-
-function toggleFolder(node: FileNode) {
-  workspaceStore.toggleFolder(node.path)
+function beginCreate(type: 'file' | 'folder', parent = '/') {
+  newItemType.value = type
+  newItemName.value = ''
+  parentPath.value = parent
 }
 
-async function openFile(node: FileNode) {
-  if (node.type === 'folder') {
-    toggleFolder(node)
-    return
+async function createItem() {
+  const rawName = newItemName.value.trim()
+  if (!rawName || !newItemType.value) return
+  if (newItemType.value === 'file') {
+    const name = rawName.endsWith('.md') ? rawName : `${rawName}.md`
+    const file = await workspaceService.createFile(parentPath.value, name, `# ${rawName}\n\n`)
+    workspaceStore.addFileToTree(parentPath.value, file)
+    workspaceStore.openFile(file.path)
+    await editorStore.loadFile(file.path)
+    await router.push('/workspace')
+  } else {
+    const folder = await workspaceService.createFolder(parentPath.value, rawName)
+    workspaceStore.addFileToTree(parentPath.value, folder)
   }
+  newItemType.value = null
+  newItemName.value = ''
+}
+
+async function openNode(node: FileNode) {
+  if (node.type === 'folder') return workspaceStore.toggleFolder(node.path)
   workspaceStore.openFile(node.path)
   await editorStore.loadFile(node.path)
-  router.push('/workspace')
+  await router.push('/workspace')
 }
 
-function startNewFile(parentPath = '') {
-  newFileParentPath.value = parentPath
-  showNewFileInput.value = true
-  showNewMenu.value = false
-  newFileName.value = ''
+function openContextMenu(event: MouseEvent, node: FileNode) {
+  event.preventDefault()
+  event.stopPropagation()
+  contextTarget.value = node
+  contextMenuPosition.value = { x: event.clientX, y: event.clientY }
 }
 
-function startNewFolder(parentPath = '') {
-  newFileParentPath.value = parentPath
-  showNewFolderInput.value = true
-  showNewMenu.value = false
-  newFolderName.value = ''
-}
+function closeContextMenu() { contextTarget.value = null }
 
-async function createFile() {
-  if (!newFileName.value.trim()) return
-  const name = newFileName.value.endsWith('.md') ? newFileName.value : `${newFileName.value}.md`
-  const file = await workspaceService.createFile(newFileParentPath.value || '/', name, '# ' + newFileName.value + '\n\n')
-  workspaceStore.addFileToTree(newFileParentPath.value || '/', file)
-  workspaceStore.openFile(file.path)
-  await editorStore.loadFile(file.path)
-  showNewFileInput.value = false
-  newFileName.value = ''
-}
-
-async function createFolder() {
-  if (!newFolderName.value.trim()) return
-  const folder = await workspaceService.createFolder(newFileParentPath.value || '/', newFolderName.value)
-  workspaceStore.addFileToTree(newFileParentPath.value || '/', folder)
-  showNewFolderInput.value = false
-  newFolderName.value = ''
-}
-
-function onContextMenu(e: MouseEvent, node: FileNode) {
-  e.preventDefault()
-  contextMenuPath.value = node.path
-  contextMenuPos.value = { x: e.clientX, y: e.clientY }
-  showContextMenu.value = true
-}
-
-function closeContextMenu() {
-  showContextMenu.value = false
-  contextMenuPath.value = null
-}
-
-function startRename(node: FileNode) {
-  renamingPath.value = node.path
-  renameValue.value = node.name
-  showContextMenu.value = false
-}
-
-async function finishRename(node: FileNode) {
-  if (renameValue.value && renameValue.value !== node.name) {
-    await workspaceService.renameFile(node.path, renameValue.value)
-    node.name = renameValue.value
+async function renameTarget() {
+  const node = contextTarget.value
+  if (!node) return
+  const newName = window.prompt('新名称', node.name)?.trim()
+  if (newName && newName !== node.name) {
+    await workspaceService.renameFile(node.path, newName)
+    node.name = newName
   }
-  renamingPath.value = null
+  closeContextMenu()
 }
 
-async function deleteNode(node: FileNode) {
-  const confirmMsg = node.type === 'folder' ? `确定要删除文件夹 "${node.name}" 吗？` : `确定要删除笔记 "${node.name}" 吗？`
-  if (confirm(confirmMsg)) {
-    await workspaceService.deleteFile(node.path)
-    workspaceStore.removeFromTree(node.path)
-    if (node.type === 'file') {
-      workspaceStore.closeFile(node.path)
-    }
-  }
-  showContextMenu.value = false
-}
-
-function getFileIcon(name: string) {
-  if (name.endsWith('.md')) return '📄'
-  return '📄'
+async function deleteTarget() {
+  const node = contextTarget.value
+  if (!node) return
+  if (!window.confirm(`确定要删除“${node.name}”吗？`)) return closeContextMenu()
+  await workspaceService.deleteFile(node.path)
+  workspaceStore.removeFromTree(node.path)
+  if (node.type === 'file') workspaceStore.closeFile(node.path)
+  closeContextMenu()
 }
 </script>
 
 <template>
-  <div class="file-tree-panel" @click="closeContextMenu">
-    <div class="panel-toolbar">
-      <div class="toolbar-left">
-        <button class="tool-btn" @click="startNewFile" title="新建笔记">
-          <span>➕</span>
-        </button>
-        <button class="tool-btn" @click="startNewFolder" title="新建文件夹">
-          <span>📁</span>
-        </button>
-      </div>
-      <button class="tool-btn" title="刷新">
-        <span>🔄</span>
-      </button>
+  <section class="file-tree-panel" @click="closeContextMenu">
+    <div class="toolbar">
+      <button type="button" title="新建笔记" @click.stop="beginCreate('file')">＋📄</button>
+      <button type="button" title="新建文件夹" @click.stop="beginCreate('folder')">＋📁</button>
     </div>
-
-    <div class="new-input" v-if="showNewFileInput">
-      <input
-        v-model="newFileName"
-        type="text"
-        placeholder="笔记名称"
-        @keyup.enter="createFile"
-        @keyup.esc="showNewFileInput = false"
-        autofocus
-      />
+    <form v-if="newItemType" class="new-item" @submit.prevent="createItem">
+      <input v-model="newItemName" :placeholder="newItemType === 'file' ? '笔记名称' : '文件夹名称'" autofocus />
+      <button type="submit">创建</button>
+      <button type="button" @click="newItemType = null">取消</button>
+    </form>
+    <div class="tree">
+      <FileTreeNode v-for="node in workspaceStore.fileTree" :key="node.id" :node="node"
+        :active-path="workspaceStore.activeFilePath" @open="openNode" @context-menu="openContextMenu" />
     </div>
-    <div class="new-input" v-if="showNewFolderInput">
-      <input
-        v-model="newFolderName"
-        type="text"
-        placeholder="文件夹名称"
-        @keyup.enter="createFolder"
-        @keyup.esc="showNewFolderInput = false"
-        autofocus
-      />
-    </div>
-
-    <div class="tree-container">
-      <template v-for="node in workspaceStore.fileTree" :key="node.id">
-        <div class="tree-node-wrapper">
-          <TreeNode :node="node" :depth="0" @open="openFile" @toggle="toggleFolder" @context-menu="onContextMenu"
-            :renaming-path="renamingPath" :rename-value="renameValue"
-            @rename-start="startRename" @rename-finish="finishRename"
-            @delete-node="deleteNode"
-            @new-file="startNewFile" @new-folder="startNewFolder" />
-        </div>
-      </template>
-    </div>
-
     <Teleport to="body">
-      <div v-if="showContextMenu" class="context-menu"
-        :style="{ left: contextMenuPos.x + 'px', top: contextMenuPos.y + 'px' }"
-        @click.stop>
-        <button @click="() => { const n = workspaceStore.activeFile; if (n) startRename(n) }">✏️ 重命名</button>
-        <button @click="() => { const n = workspaceStore.activeFile; if (n) deleteNode(n) }" class="danger">🗑️ 删除</button>
+      <div v-if="contextTarget" class="context-menu"
+        :style="{ left: `${contextMenuPosition.x}px`, top: `${contextMenuPosition.y}px` }" @click.stop>
+        <button @click="renameTarget">重命名</button>
+        <button class="danger" @click="deleteTarget">删除</button>
       </div>
     </Teleport>
-  </div>
+  </section>
 </template>
 
-<script lang="ts">
-import { defineComponent, h } from 'vue'
-import type { FileNode } from '@/contracts'
-
-const TreeNode = defineComponent({
-  name: 'TreeNode',
-  props: {
-    node: { type: Object as () => FileNode, required: true },
-    depth: { type: Number, default: 0 },
-    renamingPath: { type: String, default: null },
-    renameValue: { type: String, default: '' },
-  },
-  emits: ['open', 'toggle', 'context-menu', 'rename-start', 'rename-finish', 'delete-node', 'new-file', 'new-folder'],
-  setup(props, { emit }) {
-    const isActive = (path: string) => {
-      const { useWorkspaceStore } = require('@/stores/workspace')
-      return useWorkspaceStore().activeFilePath === path
-    }
-
-    const handleClick = () => {
-      emit('open', props.node)
-    }
-
-    const handleContextMenu = (e: MouseEvent) => {
-      emit('context-menu', e, props.node)
-    }
-
-    const finishRename = () => {
-      emit('rename-finish', props.node)
-    }
-
-    return () => {
-      const isFolder = props.node.type === 'folder'
-      const isOpen = props.node.is_open
-      const isRenaming = props.renamingPath === props.node.path
-      const active = isActive(props.node.path)
-
-      return h('div', { class: 'tree-node' }, [
-        h('div', {
-          class: ['node-row', { active, folder: isFolder, open: isOpen }],
-          style: { paddingLeft: `${props.depth * 16 + 8}px` },
-          onClick: handleClick,
-          onContextmenu: handleContextMenu,
-        }, [
-          h('span', { class: 'chevron' }, isFolder ? (isOpen ? '▼' : '▶') : ''),
-          h('span', { class: 'node-icon' }, isFolder ? (isOpen ? '📂' : '📁') : '📄'),
-          isRenaming
-            ? h('input', {
-                class: 'rename-input',
-                value: props.renameValue,
-                autofocus: true,
-                onBlur: finishRename,
-                onKeyup: (e: KeyboardEvent) => {
-                  if (e.key === 'Enter') finishRename()
-                  if (e.key === 'Escape') emit('rename-finish', props.node)
-                },
-              })
-            : h('span', { class: 'node-name' }, props.node.name),
-        ]),
-        isFolder && isOpen && props.node.children && props.node.children.length
-          ? h('div', { class: 'node-children' },
-              props.node.children.map((child) =>
-                h(TreeNode, {
-                  key: child.id,
-                  node: child,
-                  depth: props.depth + 1,
-                  renamingPath: props.renamingPath,
-                  renameValue: props.renameValue,
-                  onOpen: (n: FileNode) => emit('open', n),
-                  onToggle: (n: FileNode) => emit('toggle', n.path),
-                  onContextmenu: (e: MouseEvent, n: FileNode) => emit('context-menu', e, n),
-                  onRenameStart: (n: FileNode) => emit('rename-start', n),
-                  onRenameFinish: (n: FileNode) => emit('rename-finish', n),
-                  onDeleteNode: (n: FileNode) => emit('delete-node', n),
-                  onNewFile: (p: string) => emit('new-file', p),
-                  onNewFolder: (p: string) => emit('new-folder', p),
-                })
-              )
-            )
-          : null,
-      ])
-    }
-  },
-})
-
-export default {}
-</script>
-
 <style scoped>
-.file-tree-panel {
-  height: 100%;
-  display: flex;
-  flex-direction: column;
-  font-size: var(--font-size-sm);
-}
-
-.panel-toolbar {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  padding: var(--space-sm) var(--space-md);
-  border-bottom: 1px solid var(--color-border-subtle);
-}
-
-.toolbar-left {
-  display: flex;
-  gap: 2px;
-}
-
-.tool-btn {
-  width: 28px;
-  height: 28px;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  border-radius: var(--radius-sm);
-  color: var(--color-text-secondary);
-  font-size: 14px;
-  transition: all var(--motion-fast);
-
-  &:hover {
-    background: var(--color-background-hover);
-    color: var(--color-text-primary);
-  }
-}
-
-.new-input {
-  padding: var(--space-sm) var(--space-md);
-
-  input {
-    width: 100%;
-    padding: 4px 8px;
-    background: var(--color-background-secondary);
-    border: 1px solid var(--color-border-focus);
-    border-radius: var(--radius-sm);
-    font-size: 13px;
-    outline: none;
-  }
-}
-
-.tree-container {
-  flex: 1;
-  overflow-y: auto;
-  overflow-x: hidden;
-  padding: var(--space-xs) 0;
-}
-
-.tree-node {
-  user-select: none;
-}
-
-.node-row {
-  display: flex;
-  align-items: center;
-  gap: 4px;
-  height: 28px;
-  padding-right: var(--space-md);
-  cursor: pointer;
-  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
-  margin-right: 4px;
-  transition: background var(--motion-fast);
-
-  &:hover {
-    background: var(--color-background-hover);
-  }
-
-  &.active {
-    background: var(--color-accent-soft);
-    color: var(--color-accent-primary);
-  }
-}
-
-.chevron {
-  width: 14px;
-  font-size: 9px;
-  color: var(--color-text-tertiary);
-  flex-shrink: 0;
-}
-
-.node-icon {
-  font-size: 14px;
-  flex-shrink: 0;
-}
-
-.node-name {
-  flex: 1;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-  color: var(--color-text-primary);
-}
-
-.rename-input {
-  flex: 1;
-  padding: 2px 4px;
-  font-size: 13px;
-  background: var(--color-surface-primary);
-  border: 1px solid var(--color-border-focus);
-  border-radius: var(--radius-sm);
-  outline: none;
-}
-
-.context-menu {
-  position: fixed;
-  z-index: var(--z-dropdown);
-  background: var(--color-surface-elevated);
-  border: 1px solid var(--color-border-default);
-  border-radius: var(--radius-md);
-  padding: 4px;
-  box-shadow: var(--shadow-lg);
-  min-width: 140px;
-  display: flex;
-  flex-direction: column;
-
-  button {
-    text-align: left;
-    padding: 6px 10px;
-    font-size: 13px;
-    color: var(--color-text-primary);
-    border-radius: var(--radius-sm);
-
-    &:hover {
-      background: var(--color-background-hover);
-    }
-
-    &.danger {
-      color: var(--color-error);
-    }
-  }
-}
+.file-tree-panel { height: 100%; }
+.toolbar { display: flex; gap: var(--space-xs); padding: var(--space-sm); border-bottom: 1px solid var(--color-border-subtle); }
+button { border: 0; border-radius: var(--radius-sm); padding: var(--space-xs) var(--space-sm); background: transparent; color: inherit; cursor: pointer; }
+button:hover { background: var(--color-background-secondary); }
+.new-item { display: flex; gap: var(--space-xs); padding: var(--space-sm); }
+.new-item input { min-width: 0; flex: 1; }
+.tree { padding: var(--space-xs); }
+.context-menu { position: fixed; z-index: 1000; display: grid; min-width: 130px; padding: var(--space-xs); border: 1px solid var(--color-border-default); border-radius: var(--radius-md); background: var(--color-background-primary); box-shadow: var(--shadow-md); }
+.context-menu button { text-align: left; }
+.context-menu .danger { color: var(--color-danger, #d33); }
 </style>