feat: optimize desktop client style

- light theme colors, fix chat cancel logic, add clear-context feedback, polish thinking step icon/order, and align channels empty state with the web console

desktop/src/renderer/src/components/MessageBubble.tsx

@@ -121,8 +121,15 @@ const MessageBubble: React.FC<MessageBubbleProps> = ({ message, onRegenerate, on
               muted, separated from the final answer by a dashed divider. */}
           {(hasSteps || hasLiveReasoning) && (
             <div className="mb-2.5 pb-2 border-b border-dashed border-default">
-              {hasLiveReasoning && <ThinkingStep content={message.reasoning!} streaming />}
               {hasSteps && <MessageSteps steps={message.steps!} />}
+              {/* Live reasoning is the current, not-yet-committed thinking, so it
+                  must render after all committed steps (tools/thinking), not at
+                  the very top of the bubble. */}
+              {hasLiveReasoning && (
+                <div className={hasSteps ? 'mt-1' : ''}>
+                  <ThinkingStep content={message.reasoning!} streaming />
+                </div>
+              )}
             </div>
           )}
 

desktop/src/renderer/src/components/MessageSteps.tsx

@@ -1,6 +1,7 @@
 import React, { useState } from 'react'
-import { ChevronRight, Loader2, Check, X, Brain } from 'lucide-react'
+import { ChevronRight, Loader2, Check, X, Lightbulb } from 'lucide-react'
 import type { MessageStep } from '../types'
+import { t } from '../i18n'
 import Markdown from './Markdown'
 
 /**
@@ -16,8 +17,8 @@ const ThinkingStep: React.FC<{ content: string; streaming?: boolean }> = ({ cont
         className="flex items-center gap-1.5 cursor-pointer hover:text-content-secondary select-none transition-colors"
         onClick={() => setExpanded((v) => !v)}
       >
-        <Brain size={12} className="flex-shrink-0" />
-        <span className="flex-1">{streaming ? 'Thinking…' : 'Thought for a moment'}</span>
+        <Lightbulb size={13} className={`flex-shrink-0 text-amber-400 ${streaming ? 'animate-pulse' : ''}`} />
+        <span className="flex-1">{streaming ? t('thinking_in_progress') : t('thinking_done')}</span>
         <ChevronRight size={11} className={`transition-transform opacity-50 ${expanded ? 'rotate-90' : ''}`} />
       </div>
       {expanded && (

desktop/src/renderer/src/i18n.ts

@@ -129,14 +129,17 @@ const translations: Record<string, Record<string, string>> = {
     msg_cancelled: '已中止',
     msg_self_learned: '自主学习',
     msg_stop: '停止',
+    thinking_in_progress: '思考中…',
+    thinking_done: '已深度思考',
     chat_clear_context: '清除上下文',
+    context_cleared: '— 以上内容已从上下文中移除 —',
     chat_load_earlier: '加载更早的消息',
     chat_send: '发送',
     chat_attach: '添加附件',
     slash_hint: '输入 / 查看命令',
     chat_welcome: '有什么可以帮你的？',
     chat_empty_hint: '发送一条消息开始对话',
-    welcome_subtitle: '我可以帮你解答问题、管理你的电脑、创建并执行技能，\n还能通过长期记忆不断成长。',
+    welcome_subtitle: '我可以帮你解决问题、管理你的电脑、创建并执行技能，\n还能通过长期记忆不断成长。',
     example_sys_title: '系统管理',
     example_sys_text: '查看工作空间里有哪些文件',
     example_task_title: '定时任务',
@@ -288,6 +291,8 @@ const translations: Record<string, Record<string, string>> = {
     channels_connected_section: '已连接',
     channels_available_section: '可添加',
     channels_empty_connected: '暂无已连接的通道',
+    channels_empty: '暂未接入任何通道',
+    channels_empty_desc: '点击右上角「接入通道」按钮，即可将 CowAgent 接入微信、飞书、钉钉等消息通道',
     channels_qr_hint: '该通道通过扫码登录，请前往 Web 控制台完成扫码连接',
     channels_save_ok: '已保存',
     channels_save_error: '保存失败',
@@ -512,7 +517,10 @@ const translations: Record<string, Record<string, string>> = {
     msg_cancelled: 'Cancelled',
     msg_self_learned: 'Self-learned',
     msg_stop: 'Stop',
+    thinking_in_progress: 'Thinking…',
+    thinking_done: 'Thought',
     chat_clear_context: 'Clear context',
+    context_cleared: '— Context above has been cleared —',
     chat_load_earlier: 'Load earlier messages',
     chat_send: 'Send',
     chat_attach: 'Attach file',
@@ -671,6 +679,8 @@ const translations: Record<string, Record<string, string>> = {
     channels_connected_section: 'Connected',
     channels_available_section: 'Available',
     channels_empty_connected: 'No connected channels yet',
+    channels_empty: 'No channels connected',
+    channels_empty_desc: 'Click "Add channel" above to connect CowAgent to WeChat, Feishu, DingTalk and more',
     channels_qr_hint: 'This channel uses QR login — please connect it from the Web console',
     channels_save_ok: 'Saved',
     channels_save_error: 'Failed to save',

desktop/src/renderer/src/index.css

@@ -27,21 +27,21 @@
   --danger-border: rgba(239, 68, 68, 0.3);
   --info: #3b82f6;
 
-  /* Light theme — aligned with the web console (Tailwind gray/slate palette) */
+  /* Light theme — aligned with the web console: gray surfaces/borders + slate text */
   --bg-base: #f9fafb;        /* app background (gray-50) */
   --bg-surface: #ffffff;     /* panels, cards */
-  --bg-surface-2: #f1f5f9;   /* nested surfaces, hover fills (slate-100) */
+  --bg-surface-2: #f3f4f6;   /* nested surfaces, hover fills (gray-100) */
   --bg-elevated: #ffffff;    /* popovers, menus, modals */
-  --bg-inset: #f1f5f9;       /* inputs, code blocks (slate-100) */
+  --bg-inset: #f3f4f6;       /* inputs, code blocks (gray-100) */
 
   --text-primary: #1e293b;   /* headings, primary text (slate-800) */
   --text-secondary: #475569; /* body, labels (slate-600) */
   --text-tertiary: #64748b;  /* hints, captions (slate-500) */
   --text-disabled: #94a3b8;  /* slate-400 */
 
-  --border-default: #e2e8f0; /* slate-200 */
-  --border-strong: #cbd5e1;  /* slate-300 */
-  --border-subtle: #f1f5f9;  /* slate-100 */
+  --border-default: #e5e7eb; /* gray-200 (web console border) */
+  --border-strong: #d1d5db;  /* gray-300 */
+  --border-subtle: #f3f4f6;  /* gray-100 */
 
   --overlay: rgba(0, 0, 0, 0.4);
   --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);

desktop/src/renderer/src/pages/ChannelsPage.tsx

@@ -13,6 +13,7 @@ import {
   Headset,
   Hash,
   AtSign,
+  RadioTower,
 } from 'lucide-react'
 import { t, localizedLabel } from '../i18n'
 import apiClient from '../api/client'
@@ -147,7 +148,25 @@ const ChannelsPage: React.FC<ChannelsPageProps> = ({ baseUrl }) => {
           ) : (
             <div className="space-y-3">
               {connected.length === 0 && !addOpen ? (
-                <p className="text-sm text-content-tertiary py-2">{t('channels_empty_connected')}</p>
+                <div className="flex flex-col items-center justify-center text-center py-16 px-6">
+                  <span className="w-16 h-16 rounded-2xl bg-info/10 flex items-center justify-center mb-4">
+                    <RadioTower size={26} className="text-info" />
+                  </span>
+                  <p className="text-content-secondary font-medium">{t('channels_empty')}</p>
+                  <p className="text-sm text-content-tertiary mt-1.5 max-w-sm leading-relaxed">
+                    {t('channels_empty_desc')}
+                  </p>
+                  {available.length > 0 && (
+                    <div className="mt-5">
+                      <Btn variant="primary" onClick={openAdd}>
+                        <span className="flex items-center gap-1.5">
+                          <Plus size={15} />
+                          {t('channels_add')}
+                        </span>
+                      </Btn>
+                    </div>
+                  )}
+                </div>
               ) : (
                 connected.map((ch) => <ChannelCard key={ch.name} channel={ch} onChanged={loadChannels} />)
               )}

desktop/src/renderer/src/pages/ChatPage.tsx

@@ -278,16 +278,30 @@ const ChatPage: React.FC<ChatPageProps> = ({ baseUrl }) => {
           </div>
         ) : (
           <div className="py-3 max-w-3xl mx-auto">
-            {messages.map((msg) => (
-              <MessageBubble
-                key={msg.id}
-                message={msg}
-                onRegenerate={handleRegenerate}
-                onEdit={handleEdit}
-                onDelete={handleDelete}
-                onMediaLoad={handleMediaLoad}
-              />
-            ))}
+            {messages.map((msg) =>
+              msg.kind === 'divider' ? (
+                <div key={msg.id} className="flex items-center gap-3 px-6 py-3 text-content-tertiary">
+                  <span
+                    className="flex-1 h-px"
+                    style={{ background: 'linear-gradient(to right, transparent, var(--border-strong), transparent)' }}
+                  />
+                  <span className="text-xs whitespace-nowrap">{t('context_cleared')}</span>
+                  <span
+                    className="flex-1 h-px"
+                    style={{ background: 'linear-gradient(to right, transparent, var(--border-strong), transparent)' }}
+                  />
+                </div>
+              ) : (
+                <MessageBubble
+                  key={msg.id}
+                  message={msg}
+                  onRegenerate={handleRegenerate}
+                  onEdit={handleEdit}
+                  onDelete={handleDelete}
+                  onMediaLoad={handleMediaLoad}
+                />
+              )
+            )}
             <div ref={bottomRef} />
           </div>
         )}