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/components/ACPMain.tsx

@@ -7,13 +7,14 @@ import { MessageSquare, Plus, PanelLeftClose, PanelLeft } from "lucide-react";
 
 interface ACPMainProps {
   client: ACPClient;
+  agentId?: string;
 }
 
 /**
  * Main container — Anthropic sidebar + chat layout.
  * Sidebar: sectioned by recency, orange active state, warm raised bg.
  */
-export function ACPMain({ client }: ACPMainProps) {
+export function ACPMain({ client, agentId }: ACPMainProps) {
   const [sidebarCollapsed, setSidebarCollapsed] = useState(false);
 
   // Handle session selection
@@ -36,16 +37,16 @@ export function ACPMain({ client }: ACPMainProps) {
       {/* 侧边栏 — Anthropic warm sidebar, hidden on mobile */}
       <div
         className={cn(
-          "hidden md:flex flex-col border-r border-border bg-surface-1 transition-all duration-200 flex-shrink-0",
+          "hidden md:flex flex-col border-r border-border/60 bg-surface-1/50 transition-all duration-200 flex-shrink-0",
           sidebarCollapsed ? "w-12" : "w-64",
         )}
       >
         {/* 头部 */}
-        <div className="flex items-center justify-between px-3 py-3 border-b border-border">
+        <div className="flex items-center justify-between px-3 py-4">
           {!sidebarCollapsed && (
-            <span className="text-xs font-display font-medium text-text-muted uppercase tracking-wider px-1">会话</span>
+            <span className="text-xs font-display font-semibold text-text-muted uppercase tracking-widest px-1">会话</span>
           )}
-          <div className="flex items-center gap-0.5">
+          <div className={cn("flex items-center gap-0.5", sidebarCollapsed && "mx-auto")}>
             {!sidebarCollapsed && (
               <button
                 type="button"
@@ -82,7 +83,7 @@ export function ACPMain({ client }: ACPMainProps) {
 
       {/* 聊天区域 */}
       <div className="flex-1 flex flex-col min-w-0">
-        <ChatInterface client={client} />
+        <ChatInterface client={client} agentId={agentId} />
       </div>
     </div>
   );
@@ -170,11 +171,12 @@ function SidebarSessionList({
   const groups = groupByRecency(sorted);
 
   return (
-    <nav className="py-2" aria-label="历史会话">
-      {groups.map((group) => (
+    <nav className="py-1" aria-label="历史会话">
+      {groups.map((group, gi) => (
         <div key={group.label}>
-          <div className="px-3 py-1.5">
-            <span className="text-[10px] font-display font-medium uppercase tracking-widest text-text-muted">
+          {gi > 0 && <div className="mx-3 my-2 border-t border-border/40" />}
+          <div className="px-4 py-2">
+            <span className="text-[10px] font-display font-semibold uppercase tracking-widest text-text-muted/70">
               {group.label}
             </span>
           </div>
@@ -187,15 +189,15 @@ function SidebarSessionList({
                 onSelectSession(session);
               }}
               className={cn(
-                "w-full flex items-center gap-2 px-3 py-2 text-left transition-colors",
+                "w-full flex items-center gap-2.5 px-4 py-2 text-left transition-colors rounded-none",
                 session.sessionId === activeId
-                  ? "bg-brand/10 text-text-primary border-l-2 border-l-brand"
-                  : "text-text-secondary hover:bg-surface-1/50 hover:text-text-primary border-l-2 border-l-transparent",
+                  ? "bg-brand/8 text-text-primary"
+                  : "text-text-secondary hover:bg-surface-2/60 hover:text-text-primary",
               )}
               title={session.title || session.sessionId}
             >
-              <MessageSquare className="h-3.5 w-3.5 flex-shrink-0 text-text-muted" />
-              <span className="text-sm font-display truncate">
+              <MessageSquare className="h-3.5 w-3.5 flex-shrink-0 opacity-50" />
+              <span className="text-[13px] font-display truncate leading-snug">
                 {session.title && session.title.trim() ? session.title : "新会话"}
               </span>
             </button>