diff --git a/server/routes/agent-chat.js b/server/routes/agent-chat.js
index a34e0bf..295a46b 100644
--- a/server/routes/agent-chat.js
+++ b/server/routes/agent-chat.js
@@ -807,12 +807,26 @@ function listSubAgentLogs(agentId, convId) {
 router.delete('/:agentId/conversations/:convId', (req, res) => {
   const { agentId, convId } = req.params;
   try {
-    const dir = path.join(getAgentDir(agentId), 'conversations', convId);
-    if (fs.existsSync(dir)) fs.rmSync(dir, { recursive: true, force: true });
+    const agentDir = getAgentDir(agentId);
+    // 1. 删除对话目录
+    const convDir = path.join(agentDir, 'conversations', convId);
+    if (fs.existsSync(convDir)) fs.rmSync(convDir, { recursive: true, force: true });
+    // 2. 删除关联的日志目录/文件
+    const logsDir = path.join(agentDir, 'logs');
+    if (fs.existsSync(logsDir)) {
+      for (const f of fs.readdirSync(logsDir)) {
+        if (f.includes(convId)) {
+          const fp = path.join(logsDir, f);
+          fs.rmSync(fp, { recursive: true, force: true });
+        }
+      }
+    }
+    // 3. 断开会话
     const key = `${agentId}:${convId}`;
     const entry = sessions.get(key);
     if (entry && entry.protocol) entry.protocol.disconnect();
     sessions.delete(key);
+    console.log(`[AgentChat] 🗑️ 已删除对话 ${agentId}/${convId}`);
     res.json({ success: true });
   } catch (err) { res.status(500).json({ error: err.message }); }
 });
@@ -901,6 +915,50 @@ router.get('/:agentId/file/*', (req, res) => {
   }
 });
 
+// PUT /api/agent/:agentId/file/* — 保存文件内容
+router.put('/:agentId/file/*', (req, res) => {
+  const filePath = req.params[0];
+  if (!filePath) return res.status(400).json({ error: 'file path required' });
+
+  const agentDir = getAgentDir(req.params.agentId);
+  const fullPath = path.join(agentDir, filePath);
+  if (!fullPath.startsWith(agentDir)) {
+    return res.status(403).json({ error: 'Access denied' });
+  }
+
+  try {
+    // 确保目录存在
+    const dir = path.dirname(fullPath);
+    if (!fs.existsSync(dir)) fs.mkdirSync(dir, { recursive: true });
+    fs.writeFileSync(fullPath, req.body.content || '', 'utf-8');
+    console.log(`[AgentChat] 💾 已保存文件 ${req.params.agentId}/${filePath}`);
+    res.json({ success: true, path: filePath });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// DELETE /api/agent/:agentId/file/* — 删除文件或文件夹
+router.delete('/:agentId/file/*', (req, res) => {
+  const filePath = req.params[0];
+  if (!filePath) return res.status(400).json({ error: 'file path required' });
+
+  const agentDir = getAgentDir(req.params.agentId);
+  const fullPath = path.join(agentDir, filePath);
+  if (!fullPath.startsWith(agentDir)) {
+    return res.status(403).json({ error: 'Access denied' });
+  }
+  if (!fs.existsSync(fullPath)) return res.status(404).json({ error: 'Not found' });
+
+  try {
+    fs.rmSync(fullPath, { recursive: true, force: true });
+    console.log(`[AgentChat] 🗑️ 已删除 ${req.params.agentId}/${filePath}`);
+    res.json({ success: true, path: filePath });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
 // GET/PUT /api/agent/:agentId/todo
 router.get('/:agentId/todo', (req, res) => {
   const fp = path.join(getAgentDir(req.params.agentId), 'todo.md');
diff --git a/web/src/components/FileNode.vue b/web/src/components/FileNode.vue
index 68ec1b5..4106faf 100644
--- a/web/src/components/FileNode.vue
+++ b/web/src/components/FileNode.vue
@@ -10,6 +10,7 @@
       <span class="tree-name">{{ node.name }}</span>
       <span v-if="node.type === 'file'" class="tree-size">{{ formatSize(node.size) }}</span>
       <span v-if="node.type === 'dir'" class="tree-count">{{ node.count }}</span>
+      <button class="tree-delete-btn" title="删除" @click.stop="handleDelete">🗑</button>
     </div>
     <template v-if="node.type === 'dir' && expanded && node.children">
       <FileNode
@@ -19,6 +20,7 @@
         :depth="depth + 1"
         :selected="selected"
         @select="(p) => $emit('select', p)"
+        @delete="(p) => $emit('delete', p)"
       />
     </template>
   </div>
@@ -33,7 +35,7 @@ const props = defineProps({
   selected: { type: String, default: null },
 })
 
-const emit = defineEmits(['select'])
+const emit = defineEmits(['select', 'delete'])
 const expanded = ref(props.depth < 1)
 
 const fileIcon = computed(() => {
@@ -50,6 +52,13 @@ function handleClick() {
   }
 }
 
+function handleDelete() {
+  const label = props.node.type === 'dir' ? `文件夹 "${props.node.name}" 及其所有内容` : `文件 "${props.node.name}"`
+  if (confirm(`确定删除${label}？此操作不可撤销。`)) {
+    emit('delete', props.node.path)
+  }
+}
+
 function formatSize(bytes) {
   if (!bytes) return ''
   if (bytes < 1024) return `${bytes}B`
@@ -64,6 +73,7 @@ function formatSize(bytes) {
   transition: background 0.1s; user-select: none;
 }
 .tree-node:hover { background: var(--bg-surface-hover); }
+.tree-node:hover .tree-delete-btn { opacity: 1; }
 .tree-node.active { background: var(--bg-surface-active); }
 .tree-icon { font-size: 12px; flex-shrink: 0; width: 16px; text-align: center; }
 .tree-name {
@@ -73,4 +83,10 @@ function formatSize(bytes) {
 .is-dir .tree-name { font-weight: 600; color: var(--text-primary); }
 .tree-size { font-size: 9px; color: var(--text-faint); font-family: 'JetBrains Mono', monospace; }
 .tree-count { font-size: 9px; color: var(--text-faint); }
+.tree-delete-btn {
+  opacity: 0; border: none; background: transparent; cursor: pointer;
+  font-size: 10px; padding: 1px 3px; border-radius: 3px;
+  transition: all 0.15s; flex-shrink: 0; line-height: 1;
+}
+.tree-delete-btn:hover { background: rgba(239,68,68,0.15); transform: scale(1.15); }
 </style>
diff --git a/web/src/views/AgentChat.vue b/web/src/views/AgentChat.vue
index 32ed749..773824e 100644
--- a/web/src/views/AgentChat.vue
+++ b/web/src/views/AgentChat.vue
@@ -44,7 +44,10 @@
               :class="{ active: activeConvId === (conv.conversationId || conv.id) }"
               @click="switchConversation(conv.conversationId || conv.id)"
             >
-              <div class="conv-title">{{ conv.title || '新对话' }}</div>
+              <div class="conv-card-top">
+                <div class="conv-title">{{ conv.title || '新对话' }}</div>
+                <button class="conv-delete-btn" title="删除对话" @click.stop="deleteConversation(conv.conversationId || conv.id)">🗑</button>
+              </div>
               <div class="conv-meta">
                 <span class="conv-time">{{ formatTime(conv.updatedAt) }}</span>
                 <span class="conv-count">{{ conv.messageCount || conv.stats?.messageCount || 0 }} 条</span>
@@ -207,19 +210,26 @@
           <div class="col-scroll" v-if="fileTree">
             <div class="file-tree">
               <template v-for="node in fileTree.tree" :key="node.path">
-                <FileNode :node="node" :depth="0" :selected="selectedFile" @select="previewFile" />
+                <FileNode :node="node" :depth="0" :selected="selectedFile" @select="previewFile" @delete="deleteFile" />
               </template>
             </div>
           </div>
           <div v-else class="acp-empty">加载中...</div>
         </section>
 
-        <!-- 第4列: 文件预览 -->
+        <!-- 第4列: 文件编辑器 -->
         <aside class="acp-panel" style="flex:1;min-width:300px;">
-          <div class="col-header">👁️ {{ selectedFile || '预览' }}</div>
-          <div class="col-scroll">
-            <pre v-if="previewContent !== null" class="preview-code">{{ previewContent }}</pre>
-            <div v-else class="acp-empty">← 点击文件以预览</div>
+          <div class="col-header">
+            <span>✏️ {{ selectedFile || '编辑器' }}</span>
+            <div v-if="previewContent !== null" class="editor-actions">
+              <span v-if="fileDirty" class="dirty-badge">未保存</span>
+              <button v-if="fileDirty" class="editor-btn reset-btn" @click="resetPreview">↩ 重置</button>
+              <button v-if="fileDirty" class="editor-btn save-btn" @click="saveFile">💾 保存</button>
+            </div>
+          </div>
+          <div class="col-scroll editor-scroll">
+            <textarea v-if="previewContent !== null" v-model="editContent" class="editor-textarea" spellcheck="false"></textarea>
+            <div v-else class="acp-empty">← 点击文件以编辑</div>
           </div>
         </aside>
       </template>
@@ -303,6 +313,8 @@ const activeConvId = ref(null)
 const fileTree = ref(null)
 const selectedFile = ref(null)
 const previewContent = ref(null)
+const editContent = ref(null)
+const fileDirty = computed(() => editContent.value !== null && previewContent.value !== null && editContent.value !== previewContent.value)
 
 // ─── Load ───
 
@@ -407,8 +419,45 @@ async function previewFile(filePath) {
     if (r.ok) {
       const data = await r.json()
       previewContent.value = data.content
+      editContent.value = data.content
+    }
+  } catch { previewContent.value = '(加载失败)'; editContent.value = previewContent.value }
+}
+
+function resetPreview() {
+  editContent.value = previewContent.value
+}
+
+async function saveFile() {
+  if (!agentId.value || !selectedFile.value) return
+  try {
+    const r = await fetch(`/api/agent/${agentId.value}/file/${selectedFile.value}`, {
+      method: 'PUT',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ content: editContent.value }),
+    })
+    if (r.ok) {
+      previewContent.value = editContent.value
+      // Refresh file tree to update sizes
+      await loadFileTree()
     }
-  } catch { previewContent.value = '(加载失败)' }
+  } catch (e) { console.error('Save file error:', e) }
+}
+
+async function deleteFile(filePath) {
+  if (!agentId.value) return
+  try {
+    const r = await fetch(`/api/agent/${agentId.value}/file/${filePath}`, { method: 'DELETE' })
+    if (r.ok) {
+      // If the deleted file was being previewed, clear the editor
+      if (selectedFile.value === filePath || selectedFile.value?.startsWith(filePath + '/')) {
+        selectedFile.value = null
+        previewContent.value = null
+        editContent.value = null
+      }
+      await loadFileTree()
+    }
+  } catch (e) { console.error('Delete file error:', e) }
 }
 
 function newConversation() {
@@ -449,6 +498,24 @@ async function switchConversation(convId) {
 
 function quickSend(text) { inputText.value = text; handleSend() }
 
+async function deleteConversation(convId) {
+  if (!confirm('确定删除这个对话？对话内容和日志将被永久清除。')) return
+  try {
+    const r = await fetch(`/api/agent/${agentId.value}/conversations/${convId}`, { method: 'DELETE' })
+    if (r.ok) {
+      conversations.value = conversations.value.filter(c => (c.conversationId || c.id) !== convId)
+      if (activeConvId.value === convId) {
+        activeConvId.value = null
+        messages.value = []
+        streamContent.value = ''
+        subAgents.value = {}
+        subLogList.value = []
+        acpLog.value = []
+      }
+    }
+  } catch (e) { console.error('Delete conv error:', e) }
+}
+
 // ─── Chat (SSE) ───
 
 async function handleSend() {
@@ -678,8 +745,15 @@ onMounted(async () => {
   margin-bottom: 2px; border: 1px solid transparent;
 }
 .conv-card:hover { background: var(--accent-bg); }
+.conv-card:hover .conv-delete-btn { opacity: 1; }
 .conv-card.active { background: var(--accent-bg); border-color: var(--border-active); }
-.conv-title { font-size: 11px; font-weight: 600; color: var(--text-secondary); margin-bottom: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.conv-card-top { display: flex; align-items: center; gap: 4px; }
+.conv-title { font-size: 11px; font-weight: 600; color: var(--text-secondary); margin-bottom: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; min-width: 0; }
+.conv-delete-btn {
+  opacity: 0; border: none; background: transparent; cursor: pointer; font-size: 11px;
+  padding: 2px 4px; border-radius: 4px; transition: all 0.15s; flex-shrink: 0; line-height: 1;
+}
+.conv-delete-btn:hover { background: rgba(239,68,68,0.15); transform: scale(1.15); }
 .conv-meta { display: flex; align-items: center; gap: 6px; }
 .conv-time { font-size: 9px; color: var(--text-faint); }
 .conv-count { font-size: 9px; color: var(--text-faint); }
@@ -806,4 +880,28 @@ onMounted(async () => {
 
 /* Preview (detail mode col 4) */
 .preview-code { font-family: 'JetBrains Mono', 'Menlo', monospace; font-size: 11px; line-height: 1.6; color: var(--text-secondary); white-space: pre-wrap; word-break: break-all; margin: 0; padding: 4px; }
+
+/* Editor */
+.editor-scroll { display: flex; flex-direction: column; flex: 1; padding: 0 !important; }
+.editor-textarea {
+  flex: 1; width: 100%; border: none; outline: none; resize: none;
+  background: var(--bg-code); color: var(--text-secondary);
+  font-family: 'JetBrains Mono', monospace; font-size: 11px;
+  line-height: 1.6; padding: 10px; box-sizing: border-box;
+  tab-size: 2;
+}
+.editor-textarea:focus { background: var(--bg-input-focus); }
+.editor-actions { display: flex; align-items: center; gap: 4px; }
+.dirty-badge {
+  font-size: 8px; padding: 1px 5px; border-radius: 4px;
+  background: rgba(251,191,36,0.15); color: var(--yellow-text); font-weight: 600;
+}
+.editor-btn {
+  border: none; padding: 2px 7px; border-radius: 4px; font-size: 10px;
+  cursor: pointer; transition: all 0.15s; font-weight: 600;
+}
+.reset-btn { background: var(--bg-input); color: var(--text-muted); }
+.reset-btn:hover { background: var(--bg-surface-hover); }
+.save-btn { background: var(--accent); color: #fff; }
+.save-btn:hover { box-shadow: 0 2px 8px rgba(16,185,129,0.3); }
 </style>