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/components/ACPDirectView.tsx

@@ -0,0 +1,86 @@
+import { useState, useEffect, useRef } from "react";
+import { ACPClient, DisconnectRequestedError } from "../acp/client";
+import type { ConnectionState } from "../acp/types";
+import { ACPMain } from "../../components/ACPMain";
+
+interface ACPDirectViewProps {
+  url: string;
+  token: string;
+  onBack: () => void;
+}
+
+export function ACPDirectView({ url, token, onBack }: ACPDirectViewProps) {
+  const [client, setClient] = useState<ACPClient | null>(null);
+  const [connectionState, setConnectionState] = useState<ConnectionState>("disconnected");
+  const [error, setError] = useState<string | null>(null);
+  const clientRef = useRef<ACPClient | null>(null);
+
+  useEffect(() => {
+    const acpClient = new ACPClient({ proxyUrl: url, token });
+
+    acpClient.setConnectionStateHandler((state, err) => {
+      setConnectionState(state);
+      setError(err || null);
+    });
+
+    clientRef.current = acpClient;
+    setClient(acpClient);
+
+    acpClient.connect().catch((e) => {
+      if (e instanceof DisconnectRequestedError) return;
+      setError((e as Error).message);
+      setConnectionState("error");
+    });
+
+    return () => {
+      acpClient.disconnect();
+      clientRef.current = null;
+      setClient(null);
+      setConnectionState("disconnected");
+    };
+  }, [url, token]);
+
+  return (
+    <div className="flex flex-1 flex-col overflow-hidden">
+      {error && connectionState === "error" && (
+        <div className="px-4 py-2 bg-status-error/10 text-status-error text-sm border-b">
+          {error}
+          <button
+            onClick={onBack}
+            className="ml-3 underline hover:no-underline"
+          >
+            Back to Dashboard
+          </button>
+        </div>
+      )}
+
+      {connectionState === "connecting" && (
+        <div className="flex-1 flex items-center justify-center">
+          <div className="text-center">
+            <div className="animate-spin h-8 w-8 border-2 border-brand border-t-transparent rounded-full mx-auto mb-3" />
+            <p className="text-text-muted text-sm">Connecting to ACP agent...</p>
+          </div>
+        </div>
+      )}
+
+      {connectionState === "error" && !client && (
+        <div className="flex-1 flex items-center justify-center">
+          <div className="text-center">
+            <p className="font-medium mb-1">Connection Failed</p>
+            <p className="text-text-muted text-sm mb-3">{error}</p>
+            <button
+              onClick={onBack}
+              className="rounded-lg bg-brand px-4 py-2 text-sm font-medium text-white hover:bg-brand-light transition-colors"
+            >
+              Back to Dashboard
+            </button>
+          </div>
+        </div>
+      )}
+
+      {client && connectionState === "connected" && (
+        <ACPMain client={client} />
+      )}
+    </div>
+  );
+}