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/ai-elements/conversation.tsx

@@ -28,7 +28,7 @@ export const ConversationContent = ({
   ...props
 }: ConversationContentProps) => (
   <StickToBottom.Content
-    className={cn("mx-auto flex max-w-3xl flex-col gap-4 p-4 min-w-0", className)}
+    className={cn("mx-auto flex max-w-3xl flex-col gap-2 px-4 py-8 sm:px-8 sm:py-12 min-w-0", className)}
     {...props}
   />
 );
@@ -49,18 +49,18 @@ export const ConversationEmptyState = ({
 }: ConversationEmptyStateProps) => (
   <div
     className={cn(
-      "flex size-full flex-col items-center justify-center gap-3 p-8 text-center",
+      "flex size-full flex-col items-center justify-center gap-4 p-8 text-center",
       className
     )}
     {...props}
   >
     {children ?? (
       <>
-        {icon && <div className="text-muted-foreground">{icon}</div>}
-        <div className="space-y-1">
-          <h3 className="font-medium text-sm">{title}</h3>
+        {icon && <div className="text-text-muted">{icon}</div>}
+        <div className="space-y-2">
+          <h3 className="font-semibold text-base font-display text-text-primary">{title}</h3>
           {description && (
-            <p className="text-muted-foreground text-sm">{description}</p>
+            <p className="text-text-muted text-sm leading-relaxed max-w-xs">{description}</p>
           )}
         </div>
       </>

packages/remote-control-server/web/components/ai-elements/permission-request.tsx

@@ -47,7 +47,7 @@ export function ToolPermissionButtons({ requestId, options, onRespond, className
   };
 
   return (
-    <div className={cn("p-3 border-t border-warning-border/30 border-l-3 border-l-warning-border bg-warning-bg/50", className)}>
+    <div className={cn("p-3 border-t border-warning-border/30 bg-warning-bg/50", className)}>
       <div className="flex items-center gap-2 mb-2">
         <ShieldAlertIcon className="size-4 text-warning-text" />
         <span className="text-xs font-medium text-warning-text">

packages/remote-control-server/web/components/ai-elements/reasoning.tsx

@@ -9,7 +9,7 @@ import {
 import { cn } from "../../src/lib/utils";
 import { BrainIcon, ChevronDownIcon } from "lucide-react";
 import type { ComponentProps, ReactNode } from "react";
-import { createContext, memo, useContext, useEffect, useState } from "react";
+import { createContext, memo, useCallback, useContext, useEffect, useState } from "react";
 import { Shimmer } from "./shimmer";
 
 interface ReasoningContextValue {
@@ -77,8 +77,12 @@ export const Reasoning = memo(
     }, [isStreaming, startTime, setDuration]);
 
     // Auto-open when streaming starts, auto-close when streaming ends (once only)
+    // Respect prefers-reduced-motion: skip animation auto-close
+    const prefersReducedMotion = typeof window !== "undefined"
+      && window.matchMedia("(prefers-reduced-motion: reduce)").matches;
+
     useEffect(() => {
-      if (defaultOpen && !isStreaming && isOpen && !hasAutoClosed) {
+      if (!prefersReducedMotion && defaultOpen && !isStreaming && isOpen && !hasAutoClosed) {
         const timer = setTimeout(() => {
           setIsOpen(false);
           setHasAutoClosed(true);
@@ -86,7 +90,7 @@ export const Reasoning = memo(
 
         return () => clearTimeout(timer);
       }
-    }, [isStreaming, isOpen, defaultOpen, setIsOpen, hasAutoClosed]);
+    }, [isStreaming, isOpen, defaultOpen, setIsOpen, hasAutoClosed, prefersReducedMotion]);
 
     const handleOpenChange = (newOpen: boolean) => {
       setIsOpen(newOpen);

packages/remote-control-server/web/components/ai-elements/shimmer.tsx

@@ -3,11 +3,9 @@
 import { cn } from "../../src/lib/utils";
 import { motion } from "motion/react";
 import {
-  type CSSProperties,
   type ElementType,
   type JSX,
   memo,
-  useMemo,
 } from "react";
 
 export interface TextShimmerProps {
@@ -23,37 +21,22 @@ const ShimmerComponent = ({
   as: Component = "p",
   className,
   duration = 2,
-  spread = 2,
 }: TextShimmerProps) => {
   const MotionComponent = motion.create(
     Component as keyof JSX.IntrinsicElements
   );
 
-  const dynamicSpread = useMemo(
-    () => (children?.length ?? 0) * spread,
-    [children, spread]
-  );
-
   return (
     <MotionComponent
-      animate={{ backgroundPosition: "0% center" }}
+      animate={{ opacity: [0.5, 1, 0.5] }}
       className={cn(
-        "relative inline-block bg-[length:250%_100%,auto] bg-clip-text text-transparent",
-        "[--bg:linear-gradient(90deg,#0000_calc(50%-var(--spread)),var(--color-background),#0000_calc(50%+var(--spread)))] [background-repeat:no-repeat,padding-box]",
+        "relative inline-block text-muted-foreground",
         className
       )}
-      initial={{ backgroundPosition: "100% center" }}
-      style={
-        {
-          "--spread": `${dynamicSpread}px`,
-          backgroundImage:
-            "var(--bg), linear-gradient(var(--color-muted-foreground), var(--color-muted-foreground))",
-        } as CSSProperties
-      }
       transition={{
         repeat: Number.POSITIVE_INFINITY,
         duration,
-        ease: "linear",
+        ease: "easeInOut",
       }}
     >
       {children}