feat: ACP 协议版本 remote control (#293)

* fix: 添加 usage 字段缺失时的防御性防护

第三方 API（如智谱 GLM）在某些流式响应中不返回 usage 字段，
导致 usage.input_tokens 访问 undefined 崩溃并连锁影响后续所有请求。

- claude.ts: content_block_stop 创建消息时 fallback 到 EMPTY_USAGE
- LocalAgentTask.tsx: usage 为 undefined 时提前返回
- tokens.ts: getTokenCountFromUsage 加 null guard 和 ?? 0
- cost-tracker.ts: input_tokens/output_tokens 加 ?? 0

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: ACP Plan 展示 — 支持 session/update plan 类型的可视化

补全 PlanUpdate 类型定义（PlanEntry/Priority/Status），新建 PlanView 组件
渲染进度条、状态图标和优先级标签，在 ChatInterface 中处理 plan 更新逻辑。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: 穷鬼模式下跳过 verification agent 以节省 token

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* test: 补充 RCS 后端 + 前端测试覆盖 (+116 tests)

后端新增 3 个测试文件 (70 tests):
- automationState: normalize/snapshot/equals 纯函数
- client-payload: toClientPayload 协议转换
- transport-normalize: normalizePayload + extractContent

前端新增 2 个测试文件 (46 tests):
- utils: formatTime/statusClass/truncate/extractEventText 等
- api-client: getUuid/setUuid/api GET/POST 错误处理

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: RCS ACP 页面添加权限模式选择器 + 权限响应修复

- 新增权限模式选择器 UI（6种模式：默认/自动接受编辑/跳过权限/规划/不询问/自动判断）
- 权限模式通过 ACP _meta 从 web → acp-link → agent 全链路传递
- 修复 PermissionPanel 点击"允许"发送 cancelled 而非 selected 的 bug
- 权限模式和模型选择持久化到 localStorage
- acp-link 直接连接路径同步支持 permissionMode 透传

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: RCS Web UI 重构 + QR 修复 + ACP 扫描自动跳转

- RCS Web UI 组件全面重构: Dialog 迁移 Radix UI, lazy loading,
  主题系统改进, 组件样式优化
- IdentityPanel QR 码显示修复: requestAnimationFrame 延迟绘制
  解决 Radix Dialog Portal 挂载时序问题
- ACP QR 扫描自动跳转: IdentityPanel 扫描 ACP 格式 { url, token }
  后存储 sessionStorage 并跳转 /code/?acp=1
- 新增 ACPDirectView 组件: ACP 直连视图, 用 ACPClient 连接并
  渲染 ACPMain 聊天界面

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: ACP 权限管道改进 — 模式同步 + bypass 检测 + 统一权限流水线

- agent.ts: applySessionMode 同步 appState.toolPermissionContext.mode
- agent.ts: bypassPermissions 可用性检测 (非 root 或 sandbox 环境)
- permissions.ts: createAcpCanUseTool 接入 hasPermissionsToUseTool
  统一权限流水线, 替代原来分散的处理逻辑
- permissions.ts: 支持 onModeChange 回调, 模式变更时实时同步

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: acp-link 支持 permissionMode 默认值传递给 agent

客户端 (Zed/VS Code 等) 的 new_session 不一定携带 permissionMode,
导致 agent 收到 _meta: undefined, permission 回退到 default。

修复: handleNewSession 使用 fallback 链:
  客户端传值 > config.permissionMode > ACP_PERMISSION_MODE 环境变量

使用: ACP_PERMISSION_MODE=auto acp-link claude

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* docs: 更新文档及说明

* fix: 修复类型错误

* chore: 提交脚本

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/remote-control-server/web/src/pages/Dashboard.tsx

@@ -35,13 +35,8 @@ export function Dashboard({ onNavigateSession }: DashboardProps) {
     onNavigateSession(session.id);
   };
 
-  const handleSelectEnvironment = useCallback((env: Environment) => {
-    if (env.worker_type === "acp") {
-      // Navigate to ACP agent detail page (same origin, shares UUID auth)
-      window.history.pushState(null, "", `/acp/agent/${env.id}`);
-      // Force page reload to load ACP app
-      window.location.href = `/acp/agent/${env.id}`;
-    }
+  const handleSelectEnvironment = useCallback((_env: Environment) => {
+    // ACP agents require WebSocket connection and cannot be navigated to directly
     // Bridge environments: no direct navigation (sessions are listed below)
   }, []);
 
@@ -51,6 +46,7 @@ export function Dashboard({ onNavigateSession }: DashboardProps) {
 
   return (
     <div className="mx-auto max-w-5xl px-4 py-8">
+      <h1 className="sr-only">Dashboard</h1>
       {/* Environments */}
       <section className="mb-10">
         <h2 className="mb-4 font-display text-lg font-semibold text-text-primary">Environments</h2>

packages/remote-control-server/web/src/pages/SessionDetail.tsx

@@ -6,6 +6,7 @@ import {
 } from "../api/client";
 import type { Session, SessionEvent } from "../types";
 import { isClosedSessionStatus, formatTime, cn } from "../lib/utils";
+import { Info } from "lucide-react";
 import { RCSChatAdapter } from "../lib/rcs-chat-adapter";
 import type { ThreadEntry, PendingPermission } from "../lib/types";
 import { StatusBadge } from "../components/Navbar";
@@ -25,7 +26,6 @@ import { TooltipProvider } from "../../components/ui/tooltip";
 import { ACPClient, DisconnectRequestedError } from "../acp/client";
 import { createRelayClient } from "../acp/relay-client";
 import { ACPMain } from "../../components/ACPMain";
-import { StatusDot } from "../../components/ui/connection-status";
 
 interface SessionDetailProps {
   sessionId: string;
@@ -246,6 +246,7 @@ export function SessionDetail({ sessionId }: SessionDetailProps) {
   return (
     <TooltipProvider>
       <div className="flex flex-1 flex-col overflow-hidden">
+        <h1 className="sr-only">{session.title || session.id}</h1>
         {/* Session Header */}
         <div className="border-b bg-surface-1 px-4 py-3">
           <div className="mx-auto max-w-5xl">
@@ -275,7 +276,7 @@ export function SessionDetail({ sessionId }: SessionDetailProps) {
                   className="flex items-center gap-1 rounded-md px-2 py-1 text-xs text-text-muted hover:bg-surface-2 hover:text-text-secondary transition-colors"
                   title="Session info"
                 >
-                  <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><circle cx="12" cy="12" r="10"/><path d="M12 16v-4"/><path d="M12 8h.01"/></svg>
+                  <Info className="h-3.5 w-3.5" />
                 </button>
                 <button
                   onClick={() => setTaskPanelOpen(!taskPanelOpen)}
@@ -434,24 +435,6 @@ function ACPSessionDetail({ sessionId, agentId }: { sessionId: string; agentId:
   return (
     <TooltipProvider>
       <div className="flex flex-1 flex-col overflow-hidden">
-        {/* Header */}
-        <div className="border-b bg-surface-1 px-4 py-3">
-          <div className="mx-auto max-w-5xl">
-            <div className="mb-1">
-              <a href="/code/" className="text-sm text-text-muted hover:text-text-secondary transition-colors no-underline">
-                &larr; Dashboard
-              </a>
-            </div>
-            <div className="flex items-center gap-3">
-              <StatusDot state={connectionState} />
-              <h2 className="font-display text-lg font-semibold text-text-primary">
-                {agentId}
-              </h2>
-              <span className="rounded-full bg-purple-100 px-2 py-0.5 text-xs font-medium text-purple-700">ACP</span>
-            </div>
-          </div>
-        </div>
-
         {error && connectionState === "error" && (
           <div className="px-4 py-2 bg-destructive/10 text-destructive text-sm border-b">
             {error}
@@ -478,7 +461,7 @@ function ACPSessionDetail({ sessionId, agentId }: { sessionId: string; agentId:
 
         {client && connectionState === "connected" && (
           <div className="flex-1 min-h-0">
-            <ACPMain client={client} />
+            <ACPMain client={client} agentId={agentId} />
           </div>
         )}
       </div>