feat(web): 移除 Settings 按钮，在 Header 直接显示工作目录

- 移除 ConfigPanel 及其入口按钮
- 在 Chat 页面 Header 左侧显示当前工作目录
- 初始化时并行获取会话列表和工作目录

packages/web/src/pages/Chat.tsx

@@ -3,7 +3,7 @@
  */
 
 import { useEffect, useRef } from 'react';
-import { WifiOff, MessageSquare, Settings, FolderOpen, Terminal, Plug, Zap, Bot, History, Server } from 'lucide-react';
+import { WifiOff, MessageSquare, FolderOpen, Terminal, Plug, Zap, Bot, History, Server, Folder } from 'lucide-react';
 import { motion, AnimatePresence } from 'framer-motion';
 import { toast } from 'sonner';
 import {
@@ -23,13 +23,14 @@ interface ChatPageProps {
   // 工具栏按钮
   showFileBrowser?: boolean;
   onToggleFileBrowser?: () => void;
-  onOpenConfig?: () => void;
   onOpenCommands?: () => void;
   onOpenMCP?: () => void;
   onOpenHooks?: () => void;
   onOpenAgents?: () => void;
   onOpenCheckpoints?: () => void;
   onOpenProviders?: () => void;
+  // Working Directory
+  workingDirectory?: string;
 }
 
 export function ChatPage({
@@ -39,13 +40,13 @@ export function ChatPage({
   responsive = false,
   showFileBrowser,
   onToggleFileBrowser,
-  onOpenConfig,
   onOpenCommands,
   onOpenMCP,
   onOpenHooks,
   onOpenAgents,
   onOpenCheckpoints,
   onOpenProviders,
+  workingDirectory,
 }: ChatPageProps) {
   const {
     messages,
@@ -152,8 +153,19 @@ export function ChatPage({
     <div className="flex-1 flex flex-col h-screen">
       {/* Header */}
       <div className="flex items-center justify-between px-4 md:px-6 py-3 border-b border-line bg-surface-subtle">
-        <h1 className="text-lg font-medium text-fg">Chat</h1>
-        <div className="flex items-center gap-3">
+        <div className="flex items-center gap-3 min-w-0">
+          <h1 className="text-lg font-medium text-fg flex-shrink-0">Chat</h1>
+          {/* Working Directory */}
+          {workingDirectory && (
+            <div className="flex items-center gap-1.5 text-sm text-fg-muted min-w-0">
+              <Folder size={14} className="flex-shrink-0 text-fg-subtle" />
+              <span className="truncate font-mono text-xs" title={workingDirectory}>
+                {workingDirectory}
+              </span>
+            </div>
+          )}
+        </div>
+        <div className="flex items-center gap-3 flex-shrink-0">
           {/* 上下文使用情况 - 紧凑模式 */}
           {sessionId && (
             <ContextUsage
@@ -168,7 +180,7 @@ export function ChatPage({
           <ConnectionStatus />
 
           {/* 工具栏按钮 */}
-          {(onOpenConfig || onToggleFileBrowser || onOpenCommands || onOpenMCP || onOpenHooks || onOpenAgents || onOpenCheckpoints || onOpenProviders) && (
+          {(onToggleFileBrowser || onOpenCommands || onOpenMCP || onOpenHooks || onOpenAgents || onOpenCheckpoints || onOpenProviders) && (
             <div className="flex items-center gap-1.5 border-l border-line-muted pl-3">
               {/* Checkpoints 按钮 */}
               {onOpenCheckpoints && (
@@ -248,19 +260,6 @@ export function ChatPage({
                 </motion.button>
               )}
 
-              {/* 配置按钮 */}
-              {onOpenConfig && (
-                <motion.button
-                  whileHover={{ scale: 1.1 }}
-                  whileTap={{ scale: 0.9 }}
-                  onClick={onOpenConfig}
-                  className="p-1.5 rounded-lg text-fg-muted hover:text-fg-secondary hover:bg-surface-muted transition-colors"
-                  title="Settings"
-                >
-                  <Settings size={20} />
-                </motion.button>
-              )}
-
               {/* 文件浏览器按钮 - 仅桌面端显示 */}
               {onToggleFileBrowser && (
                 <motion.button