feat: v0.4.0 四阶段迭代 — 安全加固 + 工程基线 + 架构重构 + 双 Provider 扩展

P0 安全修复:
- API Key 加密存储（safeStorage 密钥链，版本化前缀，历史明文平滑兼容）
- 间接提示注入防护（SecurityScanHook 工具结果深扫描，网络工具脱敏/本地工具警示分级）
- error:report IPC 断链修复（渲染进程错误上报落 electron-log + 审计）
- abort 信号贯通工具层（run_command/dev-tools 子进程随会话中断终止）
- run_command 沙箱加固（cd 系统目录/敏感文件读取拦截 + chcp 前缀剥离防解析退化）
- .env 真实生效（dotenv 回退加载，应用内配置优先）

P1 工程基础:
- ESLint 9 flat config + 全部 34 条存量 warnings 清零（零容忍基线）
- 测试基线 118 用例 11 文件（token/文件防护/权限/沙箱/注入/命令/引擎/注册表/审计链/摘要分层）
- test:electron 双模式（ELECTRON_RUN_AS_NODE 跑 Electron ABI，SQLite 套件全执行）
- SessionRecorder 多会话隔离 + 9 种 TRACE 事件补全（含最终轮 iteration_end）
- Provider 故障转移（重试耗尽/不可重试一次性切换 fallback + 前端通知）
- MCP 真就绪（等待全部连接完成再广播 tools:ready）
- SLO/HealthChecker 真实接入（60s 巡检 + 托盘状态）
- CONFIG_DEFAULTS 单一来源（消除 SEED 双源漂移）

P2 架构升级:
- handlers.ts 1940 行拆分为 13 个 IPC 域模块（防重入注册 + 多窗口广播）
- AgentEngineManager 每会话独立引擎（LRU 30 + adapter 工厂隔离 abort 信号）
- TaskOrchestrator EngineProvider 改造 + abortByParent 联动中断 SubAgent
- 会话摘要分层上下文（session_summaries 滚动摘要 + 截断游标清理防因果污染）
- 消息编辑重发/重新生成（truncateAfter IPC + store 动作 + UI）
- Markdown 导出 / WebSearch 并行抓取（并发 3）/ 记忆 TF 缓存 / 版本构建期注入

P3 能力扩展:
- OpenAI Adapter（o 系列推理模型 reasoning_effort/max_completion_tokens）
- Anthropic Adapter（原生 Messages API：tool_use 块/角色合并/thinking budget/图片 base64/SSE 事件机）
- 设置页/Onboarding 六 Provider 全链路接入

src/components/CommandPalette.tsx

@@ -3,7 +3,7 @@
  */
 
 import { useState, useEffect, useRef, useCallback, useMemo } from 'react';
-import { Dialog, DialogContent, InputBase, List, ListItemButton, ListItemIcon, ListItemText, Typography, Box, Divider } from '@mui/material';
+import { Dialog, InputBase, List, ListItemButton, ListItemIcon, ListItemText, Typography, Box, Divider } from '@mui/material';
 import { Search, MessageSquare, Settings, Plus, Trash2 } from 'lucide-react';
 import { useUIStore } from '@renderer/stores/ui-store';
 import { useSessionStore } from '@renderer/stores/session-store';

src/components/ContextMenu.tsx

@@ -175,14 +175,25 @@ function copyWithToast(text: string): void {
 export function createContextMenuItems(type: ContextMenuType, data?: unknown): ContextMenuItem[] {
   switch (type) {
     case 'message': {
-      const content = (data as { content?: string })?.content ?? '';
-      return [
+      const d = (data as { content?: string; role?: string }) ?? {};
+      const content = d.content ?? '';
+      const items: ContextMenuItem[] = [
         { id: 'copy', icon: Copy, label: '复制', action: () => copyWithToast(content) },
         { id: 'quote', icon: Quote, label: '引用回复', action: () => {
           const input = document.querySelector<HTMLTextAreaElement>('[data-chat-input]');
           if (input) { input.value = content.split('\n').map((l: string) => `> ${l}`).join('\n') + '\n\n'; input.dispatchEvent(new Event('input', { bubbles: true })); input.focus(); }
         }},
       ];
+      // P2-11: assistant 消息支持重新生成（删除最后一条用户消息后的回复并重发）
+      if (d.role === 'assistant') {
+        items.push({
+          id: 'regenerate',
+          icon: RotateCcw,
+          label: '重新生成',
+          action: () => { void useAgentStore.getState().regenerate(); },
+        });
+      }
+      return items;
     }
 
     case 'tool-call': {
@@ -258,7 +269,7 @@ export function createContextMenuItems(type: ContextMenuType, data?: unknown): C
             showError('归档失败');
           }
         }},
-        { id: 'export', icon: FileDown, label: '导出', action: () => {
+        { id: 'export', icon: FileDown, label: '导出 JSON', action: () => {
           if (sid) window.metona?.sessions.getMessages(sid).then((msgs) => {
             const b = new Blob([JSON.stringify(msgs, null, 2)], { type: 'application/json' });
             const a = document.createElement('a'); a.href = URL.createObjectURL(b); a.download = `session-${sid}.json`; a.click();
@@ -267,6 +278,20 @@ export function createContextMenuItems(type: ContextMenuType, data?: unknown): C
             showError('导出失败');
           });
         }},
+        // P2-11: 导出 Markdown（人类可读格式）
+        { id: 'export-md', icon: FileDown, label: '导出 Markdown', action: async () => {
+          if (!sid) return;
+          try {
+            const msgs = await window.metona?.sessions.getMessages(sid);
+            const { buildSessionMarkdown, downloadMarkdown } = await import('@renderer/lib/export-markdown');
+            const title = useSessionStore.getState().sessions.find((x) => x.id === sid)?.title ?? '会话导出';
+            const md = buildSessionMarkdown(title, msgs as Array<{ id: string; role: string; content: string | null; toolCalls?: Array<{ name: string }>; attachments?: Array<{ name: string }>; timestamp: number }>);
+            downloadMarkdown(`session-${sid}.md`, md);
+          } catch (err) {
+            console.error('[ContextMenu]', err);
+            showError('导出失败');
+          }
+        }},
         { id: 'delete', icon: Trash2, label: '删除', action: async () => {
           if (!sid) return;
           // 用 MUI Dialog 替代原生 confirm()（Electron 下不可靠）

src/components/chat/AssistantMessage.tsx

@@ -41,7 +41,7 @@ function AssistantMessageImpl({ message, isStreaming }: AssistantMessageProps):
   //          新 isThinking = agentStatus === 'thinking'（agentStatus 在非流式时恒为 'idle'）
   const agentStatus = useAgentStore((s) => (isStreaming ? s.agentStatus : 'idle'));
 
-  const contextMenuItems = createContextMenuItems('message', { content });
+  const contextMenuItems = createContextMenuItems('message', { content, role: 'assistant' });
 
   const hasThinking = !!message.reasoningContent;
   const hasTools = !!message.toolCalls?.length;

src/components/chat/ChatInput.tsx

@@ -16,13 +16,13 @@ import { nanoid } from 'nanoid';
 import { useAgentStore } from '@renderer/stores/agent-store';
 import { useSessionStore } from '@renderer/stores/session-store';
 import { useUIStore } from '@renderer/stores/ui-store';
-import { formatTokens, formatFileSize } from '@renderer/lib/formatters';
+import { formatFileSize } from '@renderer/lib/formatters';
 
 const SLASH_COMMANDS = [
   { id: 'tool', label: '/tool', description: '选择工具' },
   { id: 'memory', label: '/memory', description: '搜索记忆' },
   { id: 'clear', label: '/clear', description: '清空会话' },
-  { id: 'export', label: '/export', description: '导出会话' },
+  { id: 'export', label: '/export', description: '导出 Markdown' },
 ];
 
 const IMAGE_TYPES = ['image/png', 'image/jpeg', 'image/gif', 'image/webp'];
@@ -49,7 +49,6 @@ export function ChatInput(): React.JSX.Element {
   const configLoaded = useAgentStore((s) => s.configLoaded);
   // v0.3.18 修复: 工具未就绪时禁用发送按钮
   const toolsReady = useAgentStore((s) => s.toolsReady);
-  const tokenUsage = useAgentStore((s) => s.tokenUsage);
   const currentSessionId = useSessionStore((s) => s.currentSessionId);
   const provider = useAgentStore((s) => s.provider);
 
@@ -182,14 +181,12 @@ export function ChatInput(): React.JSX.Element {
       const cmd = trimmed.split(' ')[0].toLowerCase();
       if (cmd === '/clear') { useAgentStore.getState().clearMessages(); setInput(''); setAttachments([]); setShowSlashMenu(false); return; }
       if (cmd === '/export') {
-        const blob = new Blob([JSON.stringify(useAgentStore.getState().messages, null, 2)], { type: 'application/json' });
-        const url = URL.createObjectURL(blob);
-        const a = document.createElement('a');
-        a.href = url;
-        a.download = `session-${Date.now()}.json`;
-        a.click();
-        // v0.3.0 修复：释放 Blob URL，避免内存泄漏
-        URL.revokeObjectURL(url);
+        // P2-11: /export 改为导出 Markdown（人类可读），JSON 导出走会话右键菜单
+        import('@renderer/lib/export-markdown').then(({ buildSessionMarkdown, downloadMarkdown }) => {
+          const messages = useAgentStore.getState().messages;
+          const md = buildSessionMarkdown('会话导出', messages);
+          downloadMarkdown(`session-${Date.now()}.md`, md);
+        }).catch(() => {});
         setInput(''); setShowSlashMenu(false); return;
       }
       // v0.3.0: /tool — 打开设置面板的工具管理 Tab
@@ -217,7 +214,7 @@ export function ChatInput(): React.JSX.Element {
     }
 
     // 构建用户可见内容（纯文本 + 附件描述隐藏）
-    let messageContent = trimmed;
+    const messageContent = trimmed;
     const images: Array<{ url: string; detail?: 'low' | 'high' | 'auto' }> = [];
 
     // 附件元数据（用于 UI 渲染）

src/components/chat/SystemMessage.tsx

@@ -4,7 +4,6 @@
 
 import { Box, Typography } from '@mui/material';
 import type { ChatMessage } from '@renderer/stores/agent-store';
-import { formatTime } from '@renderer/lib/formatters';
 
 interface SystemMessageProps { message: ChatMessage; }
 

src/components/chat/ThoughtBlock.tsx

@@ -3,7 +3,7 @@
  */
 
 import { useState, useEffect } from 'react';
-import { Box, Typography, IconButton, Collapse } from '@mui/material';
+import { Box, IconButton, Collapse } from '@mui/material';
 import { ChevronDown, ChevronRight, Brain } from 'lucide-react';
 
 interface ThoughtBlockProps { content: string; defaultExpanded?: boolean; }

src/components/chat/UserMessage.tsx

@@ -6,8 +6,8 @@
  */
 
 import { useState, useCallback, useRef, useEffect } from 'react';
-import { Box, Typography, Avatar, Stack, TextareaAutosize } from '@mui/material';
-import { User, FileText, Image as ImageIcon, X } from 'lucide-react';
+import { Box, Typography, Avatar, Stack, TextareaAutosize, Button } from '@mui/material';
+import { User, FileText, Image as ImageIcon } from 'lucide-react';
 import type { ChatMessage, AttachmentInfo } from '@renderer/stores/agent-store';
 import { useAgentStore } from '@renderer/stores/agent-store';
 import { formatTime, formatFileSize } from '@renderer/lib/formatters';
@@ -21,16 +21,24 @@ export function UserMessage({ message }: UserMessageProps): React.JSX.Element {
   const [contextMenu, setContextMenu] = useState<{ x: number; y: number } | null>(null);
   const textareaRef = useRef<HTMLTextAreaElement>(null);
   const updateMessage = useAgentStore((s) => s.updateMessage);
+  // P2-11: 编辑重发（截断该消息之后的所有消息并重新发送修订内容）
+  const editAndResend = useAgentStore((s) => s.editAndResend);
+  const isStreaming = useAgentStore((s) => s.isStreaming);
 
   const handleDoubleClick = useCallback(() => { setEditing(true); setEditContent(message.content); }, [message.content]);
   const handleEditSave = useCallback(() => {
     if (editContent.trim() && editContent !== message.content) updateMessage(message.id, { content: editContent.trim() });
     setEditing(false);
   }, [editContent, message.content, message.id, updateMessage]);
+  const handleEditResend = useCallback(() => {
+    if (!editContent.trim()) return;
+    setEditing(false);
+    void editAndResend(message.id, editContent);
+  }, [editContent, editAndResend, message.id]);
   const handleEditKeyDown = useCallback((e: React.KeyboardEvent) => {
     if (e.key === 'Escape') { setEditing(false); setEditContent(message.content); }
-    if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) handleEditSave();
-  }, [handleEditSave, message.content]);
+    if (e.key === 'Enter' && (e.ctrlKey || e.metaKey) && !e.shiftKey) handleEditResend();
+  }, [handleEditResend, message.content]);
   useEffect(() => { if (editing) textareaRef.current?.focus(); }, [editing]);
 
   const hasAttachments = message.attachments && message.attachments.length > 0;
@@ -54,14 +62,22 @@ export function UserMessage({ message }: UserMessageProps): React.JSX.Element {
 
         {/* 文本内容 */}
         {editing ? (
-          <TextareaAutosize ref={textareaRef} value={editContent} onChange={(e) => setEditContent(e.target.value)} onKeyDown={handleEditKeyDown} onBlur={handleEditSave} minRows={3} style={{ width: '100%', background: 'transparent', border: 'none', outline: 'none', color: 'inherit', fontSize: 13, lineHeight: 1.7, resize: 'none', fontFamily: 'inherit' }} />
+          <>
+            <TextareaAutosize ref={textareaRef} value={editContent} onChange={(e) => setEditContent(e.target.value)} onKeyDown={handleEditKeyDown} minRows={3} style={{ width: '100%', background: 'transparent', border: 'none', outline: 'none', color: 'inherit', fontSize: 13, lineHeight: 1.7, resize: 'none', fontFamily: 'inherit' }} />
+            <Stack direction="row" spacing={1} sx={{ mt: 1, alignItems: 'center' }}>
+              <Button size="small" variant="outlined" onClick={() => { setEditing(false); setEditContent(message.content); }}>取消</Button>
+              <Button size="small" variant="outlined" onClick={handleEditSave}>仅保存</Button>
+              <Button size="small" variant="contained" onClick={handleEditResend} disabled={isStreaming || !editContent.trim()}>保存并重发</Button>
+              <Typography variant="caption" sx={{ fontSize: 10, color: 'text.disabled' }}>重发将删除此消息之后的所有消息 · Ctrl+Enter</Typography>
+            </Stack>
+          </>
         ) : message.content ? (
           <Typography sx={{ whiteSpace: 'pre-wrap', fontSize: 13, lineHeight: 1.7, color: 'text.primary' }}>{message.content}</Typography>
         ) : null}
 
         <Typography variant="caption" sx={{ mt: 0.75, display: 'block', color: 'text.disabled' }}>{formatTime(message.timestamp)}</Typography>
       </Box>
-      {contextMenu && <ContextMenu x={contextMenu.x} y={contextMenu.y} items={createContextMenuItems('message', { content: message.content })} onClose={() => setContextMenu(null)} />}
+      {contextMenu && <ContextMenu x={contextMenu.x} y={contextMenu.y} items={createContextMenuItems('message', { content: message.content, role: 'user' })} onClose={() => setContextMenu(null)} />}
     </Stack>
   );
 }

src/components/layout/AgentMonitor.tsx

@@ -4,7 +4,7 @@
  * 完全使用 MUI 组件，Table 布局标签-值对。
  */
 
-import { Box, Typography, Stack, Table, TableBody, TableRow, TableCell, Chip } from '@mui/material';
+import { Box, Typography, Stack, Table, TableBody, TableRow, TableCell } from '@mui/material';
 import { Activity, Cpu } from 'lucide-react';
 import { useEffect, useMemo } from 'react';
 import { useAgentStore, type AgentStatus } from '@renderer/stores/agent-store';

src/components/layout/Header.tsx

@@ -32,6 +32,8 @@ const PROVIDER_LABELS: Record<string, string> = {
   agnes: 'Agnes',
   mimo: 'MiMo',
   ollama: 'Ollama',
+  openai: 'OpenAI',
+  anthropic: 'Anthropic',
 };
 
 export function Header(): React.JSX.Element {

src/components/layout/Sidebar.tsx

@@ -5,7 +5,7 @@
  */
 
 import { useState, useEffect, useMemo } from 'react';
-import { Box, Typography, Button, IconButton, TextField, Stack, Collapse, List, ListItemButton, ListItemIcon, ListItemText, Badge, Divider, Dialog, DialogTitle, DialogContent, DialogActions } from '@mui/material';
+import { Box, Typography, Button, IconButton, TextField, Collapse, List, ListItemButton, ListItemIcon, ListItemText, Badge, Divider, Dialog, DialogTitle, DialogContent, DialogActions } from '@mui/material';
 import Fuse from 'fuse.js';
 import { Plus, Search, MessageSquare, Pin, Wrench, ChevronDown, ChevronRight, Trash2 } from 'lucide-react';
 import { useSessionStore, type Session } from '@renderer/stores/session-store';

src/components/layout/StatusBar.tsx

@@ -18,7 +18,10 @@ export function StatusBar(): React.JSX.Element {
   const model = useAgentStore((s) => s.model);
   const tokenUsage = useAgentStore((s) => s.tokenUsage);
   const openSettings = useUIStore((s) => s.openSettings);
-  const [version, setVersion] = useState('v0.1.1');
+  // P2-12: 版本兜底改为构建期注入的 __APP_VERSION__（原硬编码 v0.1.1 过期）
+  const [version, setVersion] = useState(
+    typeof __APP_VERSION__ !== 'undefined' && __APP_VERSION__ ? `v${__APP_VERSION__}` : 'dev',
+  );
 
   useEffect(() => {
     // M-28 修复: 添加 cancelled 标志防止组件卸载后 setState

src/components/memory/MemoryViewer.tsx

@@ -346,7 +346,6 @@ function MemoryItemRow({
 }): React.JSX.Element {
   const type = item.type;
   const createdAt = getCreatedAt(item);
-  const importance = item.importance ?? 0;
 
   return (
     <Box

src/components/onboarding/OnboardingWizard.tsx

@@ -4,7 +4,7 @@
 
 import { useState, useEffect } from 'react';
 import { Dialog, DialogContent, Button, TextField, Select, MenuItem, Stepper, Step, StepLabel, Box, Typography, Stack, FormControl, InputLabel, IconButton, InputAdornment } from '@mui/material';
-import { ArrowRight, ArrowLeft, FolderOpen, Play, CheckCircle, Eye, EyeOff } from 'lucide-react';
+import { ArrowRight, ArrowLeft, CheckCircle, Eye, EyeOff } from 'lucide-react';
 import { useUIStore } from '@renderer/stores/ui-store';
 import { useAgentStore } from '@renderer/stores/agent-store';
 
@@ -75,6 +75,8 @@ export function OnboardingWizard(): React.JSX.Element | null {
     agnes: 1_000_000,
     mimo: 1_000_000,
     ollama: null,
+    openai: 128_000,
+    anthropic: 200_000,
   };
   // 上下文窗口校验：ollama 允许空，最小 512；其他 provider 最小 4096
   const ctxMin = provider === 'ollama' ? 512 : 4096;
@@ -163,6 +165,8 @@ export function OnboardingWizard(): React.JSX.Element | null {
                   <MenuItem value="agnes">Agnes AI</MenuItem>
                   <MenuItem value="mimo">MiMo (小米)</MenuItem>
                   <MenuItem value="ollama">Ollama (本地)</MenuItem>
+                  <MenuItem value="openai">OpenAI</MenuItem>
+                  <MenuItem value="anthropic">Anthropic</MenuItem>
                 </Select>
               </FormControl>
               <TextField size="small" label="API Base URL" value={baseURL} onChange={(e) => setBaseURL(e.target.value)} placeholder="如 https://api.deepseek.com" />

src/components/settings/SettingsModal.tsx

@@ -107,7 +107,7 @@ function useConfig<T>(key: string, defaultValue: T): [T, (v: T) => void] {
   return [value, set];
 }
 
-const PROVIDER_URLS: Record<string, string> = { deepseek: 'https://api.deepseek.com', agnes: 'https://apihub.agnes-ai.com/v1', mimo: 'https://api.xiaomimimo.com/v1', ollama: 'http://localhost:11434' };
+const PROVIDER_URLS: Record<string, string> = { deepseek: 'https://api.deepseek.com', agnes: 'https://apihub.agnes-ai.com/v1', mimo: 'https://api.xiaomimimo.com/v1', ollama: 'http://localhost:11434', openai: 'https://api.openai.com/v1', anthropic: 'https://api.anthropic.com' };
 
 function WorkspaceSettings() {
   const [workspacePath, setWorkspacePath] = useConfig('workspace.path', '');
@@ -365,7 +365,16 @@ function LLMSettings() {
   const [dsCtxWindow, setDsCtxWindow] = useState<number>(1000000);
   const [agnesCtxWindow, setAgnesCtxWindow] = useState<number>(1000000);
   const [mimoCtxWindow, setMimoCtxWindow] = useState<number>(1000000);
+  // P3: OpenAI/Anthropic contextWindow
+  const [oaCtxWindow, setOaCtxWindow] = useState<number>(128000);
+  const [anthropicCtxWindow, setAnthropicCtxWindow] = useState<number>(200000);
+  // P1: 故障转移 Provider 配置
+  const [fbProvider, setFbProvider] = useState<string>('');
+  const [fbModel, setFbModel] = useState<string>('');
+  const [fbApiKey, setFbApiKey] = useState<string>('');
+  const [fbBaseURL, setFbBaseURL] = useState<string>('');
   const [showKey, setShowKey] = useState(false);
+  const [showFbKey, setShowFbKey] = useState(false);
   const [loaded, setLoaded] = useState(false);
   const [saving, setSaving] = useState(false);
 
@@ -378,7 +387,7 @@ function LLMSettings() {
         return;
       }
       try {
-        const [p, m, k, u, nc, ds, ag, mi] = await Promise.all([
+        const results = await Promise.all([
           window.metona.config.get('llm.provider'),
           window.metona.config.get('llm.model'),
           window.metona.config.get('llm.apiKey'),
@@ -387,8 +396,16 @@ function LLMSettings() {
           window.metona.config.get('deepseek.contextWindow'),
           window.metona.config.get('agnes.contextWindow'),
           window.metona.config.get('mimo.contextWindow'),
+          window.metona.config.get('openai.contextWindow'),
+          window.metona.config.get('anthropic.contextWindow'),
+          // P1: 故障转移配置
+          window.metona.config.get('llm.fallbackProvider'),
+          window.metona.config.get('llm.fallbackModel'),
+          window.metona.config.get('llm.fallbackApiKey'),
+          window.metona.config.get('llm.fallbackBaseURL'),
         ]);
         if (cancelled) return;
+        const [p, m, k, u, nc, ds, ag, mi, oa, an, fbp, fbm, fbk, fbu] = results;
         setProvider((p as string) ?? '');
         setModel((m as string) ?? '');
         setApiKey((k as string) ?? '');
@@ -397,6 +414,12 @@ function LLMSettings() {
         if (typeof ds === 'number' && ds > 0) setDsCtxWindow(ds);
         if (typeof ag === 'number' && ag > 0) setAgnesCtxWindow(ag);
         if (typeof mi === 'number' && mi > 0) setMimoCtxWindow(mi);
+        if (typeof oa === 'number' && oa > 0) setOaCtxWindow(oa);
+        if (typeof an === 'number' && an > 0) setAnthropicCtxWindow(an);
+        setFbProvider((fbp as string) ?? '');
+        setFbModel((fbm as string) ?? '');
+        setFbApiKey((fbk as string) ?? '');
+        setFbBaseURL((fbu as string) ?? '');
       } catch (err) {
         console.error('[SettingsModal]', err);
       } finally {
@@ -423,8 +446,12 @@ function LLMSettings() {
       if (agnesCtxWindow != null && agnesCtxWindow > 0) useAgentStore.setState({ contextWindow: agnesCtxWindow });
     } else if (provider === 'mimo') {
       if (mimoCtxWindow != null && mimoCtxWindow > 0) useAgentStore.setState({ contextWindow: mimoCtxWindow });
+    } else if (provider === 'openai') {
+      if (oaCtxWindow != null && oaCtxWindow > 0) useAgentStore.setState({ contextWindow: oaCtxWindow });
+    } else if (provider === 'anthropic') {
+      if (anthropicCtxWindow != null && anthropicCtxWindow > 0) useAgentStore.setState({ contextWindow: anthropicCtxWindow });
     }
-  }, [provider, numCtx, dsCtxWindow, agnesCtxWindow, mimoCtxWindow]);
+  }, [provider, numCtx, dsCtxWindow, agnesCtxWindow, mimoCtxWindow, oaCtxWindow, anthropicCtxWindow]);
 
   // ===== 字段级 inline 校验 =====
   // Base URL：非空时必须以 http:// 或 https:// 开头（避免漏写协议头导致发消息时报 Invalid URL）
@@ -436,12 +463,16 @@ function LLMSettings() {
   const dsCtxError = !Number.isFinite(dsCtxWindow) || dsCtxWindow < 4096;
   const agnesCtxError = !Number.isFinite(agnesCtxWindow) || agnesCtxWindow < 4096;
   const mimoCtxError = !Number.isFinite(mimoCtxWindow) || mimoCtxWindow < 4096;
+  const oaCtxError = !Number.isFinite(oaCtxWindow) || oaCtxWindow < 4096;
+  const anthropicCtxError = !Number.isFinite(anthropicCtxWindow) || anthropicCtxWindow < 4096;
 
   // 是否存在阻断保存的错误（API Key 为空只警告，不阻断 — 允许先填其他字段再回来填 key）
   const hasBlockingError = urlError || modelHasSpace || numCtxError ||
     (provider === 'deepseek' && dsCtxError) ||
     (provider === 'agnes' && agnesCtxError) ||
-    (provider === 'mimo' && mimoCtxError);
+    (provider === 'mimo' && mimoCtxError) ||
+    (provider === 'openai' && oaCtxError) ||
+    (provider === 'anthropic' && anthropicCtxError);
 
   // 切换 Provider 时：清空 apiKey + 清空 model + 自动填充默认 URL
   // 不同 Provider 的 key/model 互不通用，避免用旧值调用新 API 导致 401 / model not found
@@ -477,10 +508,6 @@ function LLMSettings() {
         return;
       }
       // v0.3.9: 批量保存，避免串行保存中间态触发 reloadAdapter 失败
-      // 旧实现：串行 config:set 8 次，provider 切换后第 1 步会清空 apiKey，
-      // 此时 reloadAdapter 读到空 apiKey 返回 false，前端 toast 报"配置不全"，
-      // 但所有字段实际已写入，第二次点保存才显示"已保存"。
-      // 新实现：一次性传所有字段，后端先写入全部，最后统一 reloadAdapter 一次。
       const entries: Array<{ key: string; value: unknown }> = [
         { key: 'llm.provider', value: provider },
         { key: 'llm.model', value: model },
@@ -490,6 +517,13 @@ function LLMSettings() {
         { key: 'deepseek.contextWindow', value: dsCtxWindow },
         { key: 'agnes.contextWindow', value: agnesCtxWindow },
         { key: 'mimo.contextWindow', value: mimoCtxWindow },
+        { key: 'openai.contextWindow', value: oaCtxWindow },
+        { key: 'anthropic.contextWindow', value: anthropicCtxWindow },
+        // P1: 故障转移 Provider（主 Provider 失败时切换）
+        { key: 'llm.fallbackProvider', value: fbProvider },
+        { key: 'llm.fallbackModel', value: fbModel },
+        { key: 'llm.fallbackApiKey', value: fbApiKey },
+        { key: 'llm.fallbackBaseURL', value: fbBaseURL },
       ];
       const r = await setBatch(entries);
       if (r && !r.success) {
@@ -524,6 +558,8 @@ function LLMSettings() {
           <MenuItem value="agnes">Agnes AI</MenuItem>
           <MenuItem value="mimo">MiMo (小米)</MenuItem>
           <MenuItem value="ollama">Ollama (本地)</MenuItem>
+          <MenuItem value="openai">OpenAI</MenuItem>
+          <MenuItem value="anthropic">Anthropic</MenuItem>
         </Select>
       </FormControl>
       <TextField
@@ -540,7 +576,7 @@ function LLMSettings() {
         label="模型名称"
         value={model}
         onChange={(e) => setModel(e.target.value)}
-        placeholder="如 deepseek-v4-pro、qwen3:latest"
+        placeholder="如 deepseek-v4-pro、gpt-4o、claude-sonnet-4-5"
         error={modelHasSpace}
         helperText={modelHasSpace ? '模型名称不能包含空格' : ' '}
       />
@@ -615,6 +651,85 @@ function LLMSettings() {
           helperText={mimoCtxError ? '最小值为 4096' : '默认 1000000（1M），用于上下文压缩判断'}
         />
       )}
+      {provider === 'openai' && (
+        <TextField
+          size="small"
+          label="上下文窗口 (contextWindow)"
+          type="number"
+          value={oaCtxWindow}
+          onChange={(e) => setOaCtxWindow(Number(e.target.value) || 128000)}
+          placeholder="如 128000、200000、1000000"
+          slotProps={{ htmlInput: { min: 4096, step: 4096 } }}
+          error={oaCtxError}
+          helperText={oaCtxError ? '最小值为 4096' : 'gpt-4o 默认 128K，gpt-4.1 默认 1M'}
+        />
+      )}
+      {provider === 'anthropic' && (
+        <TextField
+          size="small"
+          label="上下文窗口 (contextWindow)"
+          type="number"
+          value={anthropicCtxWindow}
+          onChange={(e) => setAnthropicCtxWindow(Number(e.target.value) || 200000)}
+          placeholder="如 200000"
+          slotProps={{ htmlInput: { min: 4096, step: 4096 } }}
+          error={anthropicCtxError}
+          helperText={anthropicCtxError ? '最小值为 4096' : 'Claude 默认 200K'}
+        />
+      )}
+
+      {/* ===== P1: 故障转移 Provider（主 Provider 请求失败时自动切换） ===== */}
+      <Divider />
+      <Typography variant="subtitle2" sx={{ fontWeight: 600 }}>故障转移（可选）</Typography>
+      <Typography variant="caption" sx={{ color: 'text.secondary' }}>
+        主 Provider 请求失败（重试耗尽或密钥失效）时自动切换到备用 Provider 重发。留空禁用。
+      </Typography>
+      <FormControl size="small"><InputLabel>备用 Provider</InputLabel>
+        <Select value={fbProvider} label="备用 Provider" onChange={(e) => {
+          const v = e.target.value;
+          setFbProvider(v);
+          setFbModel('');
+          setFbApiKey('');
+          setFbBaseURL(PROVIDER_URLS[v] ?? '');
+        }}>
+          <MenuItem value=""><em>禁用</em></MenuItem>
+          <MenuItem value="deepseek">DeepSeek</MenuItem>
+          <MenuItem value="agnes">Agnes AI</MenuItem>
+          <MenuItem value="mimo">MiMo (小米)</MenuItem>
+          <MenuItem value="ollama">Ollama (本地)</MenuItem>
+          <MenuItem value="openai">OpenAI</MenuItem>
+          <MenuItem value="anthropic">Anthropic</MenuItem>
+        </Select>
+      </FormControl>
+      {fbProvider && (
+        <>
+          <TextField
+            size="small"
+            label="备用 Base URL"
+            value={fbBaseURL}
+            onChange={(e) => setFbBaseURL(e.target.value)}
+            placeholder="如 https://api.deepseek.com"
+          />
+          <TextField
+            size="small"
+            label="备用模型名称"
+            value={fbModel}
+            onChange={(e) => setFbModel(e.target.value)}
+            placeholder="如 deepseek-v4-flash"
+          />
+          {fbProvider !== 'ollama' && (
+            <TextField
+              size="small"
+              label="备用 API Key"
+              type={showFbKey ? 'text' : 'password'}
+              value={fbApiKey}
+              onChange={(e) => setFbApiKey(e.target.value)}
+              placeholder="sk-..."
+              slotProps={{ input: { endAdornment: <IconButton size="small" onClick={() => setShowFbKey(!showFbKey)}>{showFbKey ? <EyeOff size={14} /> : <Eye size={14} />}</IconButton> } }}
+            />
+          )}
+        </>
+      )}
 
       {/* Save 按钮：批量提交，取消 onChange 实时落库 */}
       <Stack direction="row" spacing={1} sx={{ mt: 1, alignItems: 'center' }}>
@@ -1230,7 +1345,6 @@ function LogsSettings() {
         }
       } catch (e) {
         // 获取失败不阻塞 UI
-        // eslint-disable-next-line no-console
         console.warn('[LogsSettings] Failed to get app data path:', e);
       } finally {
         if (!cancelled) setLogPathLoading(false);

src/components/trace/TraceStep.tsx

@@ -62,7 +62,6 @@ export function TraceStep({ step, isCurrent }: TraceStepProps): React.JSX.Elemen
   };
 
   const color = TRACE_STATE_COLORS[step.state] ?? '#8b8fa7';
-  const label = TRACE_STATE_LABELS[step.state] ?? step.state;
   const duration = step.completedAt ? step.completedAt - step.startedAt : null;
 
   // 构建状态进度链（如 "思考 → 执行 → 观察"）

src/components/workspace/WorkspaceViewer.tsx

@@ -14,7 +14,7 @@ import {
   Box, Typography, Stack, Accordion, AccordionSummary, AccordionDetails,
   IconButton, Chip, Alert, Tooltip, Divider,
 } from '@mui/material';
-import { FolderOpen, RefreshCw, ChevronDown, FileText, Folder, CheckCircle2, XCircle } from 'lucide-react';
+import { FolderOpen, RefreshCw, ChevronDown, Folder, CheckCircle2, XCircle } from 'lucide-react';
 import { useAgentStore } from '@renderer/stores/agent-store';
 import { formatTime, formatFileSize } from '@renderer/lib/formatters';