ui: replace session sidebar emoji icons with antd icons

src/components/SessionSidebar.tsx

@@ -1,5 +1,6 @@
 import { useEffect, useState } from 'react';
 import { Button, List, Popconfirm, Input, App as AntApp, Tooltip, Empty, Segmented, Tag, Spin, Dropdown, Modal } from 'antd';
+import { DeleteOutlined, DownloadOutlined, InboxOutlined, EditOutlined, MessageOutlined, RollbackOutlined, ShareAltOutlined } from '@ant-design/icons';
 import dayjs from 'dayjs';
 import { ChatSession, SearchHit, SessionAPI } from '../api';
 
@@ -218,25 +219,27 @@ export default function SessionSidebar({ agentId, activeSessionId, onChange, ref
               <Button
                 type="text"
                 size="small"
+                icon={<EditOutlined />}
                 onClick={() => {
                   setEditingId(s.id);
                   setEditingTitle(s.title);
                 }}
-              >
-                ✏️
-              </Button>
+              />
             </Tooltip>
             <Tooltip title={tab === 'active' ? '归档' : '恢复'}>
-              <Button type="text" size="small" onClick={() => handleArchive(s, tab === 'active')}>
-                {tab === 'active' ? '📦' : '↩️'}
-              </Button>
+              <Button
+                type="text"
+                size="small"
+                icon={tab === 'active' ? <InboxOutlined /> : <RollbackOutlined />}
+                onClick={() => handleArchive(s, tab === 'active')}
+              />
             </Tooltip>
             <Dropdown
               trigger={['click']}
               menu={{
                 items: [
-                  { key: 'md', label: '⬇️ Markdown (.md)' },
-                  { key: 'json', label: '⬇️ JSON (.json)' }
+                  { key: 'md', label: 'Markdown (.md)' },
+                  { key: 'json', label: 'JSON (.json)' }
                 ],
                 onClick: ({ key }) => {
                   SessionAPI.exportSession(agentId, s.id, key as 'md' | 'json');
@@ -245,20 +248,14 @@ export default function SessionSidebar({ agentId, activeSessionId, onChange, ref
               }}
             >
               <Tooltip title="导出会话">
-                <Button type="text" size="small">
-                  ⬇️
-                </Button>
+                <Button type="text" size="small" icon={<DownloadOutlined />} />
               </Tooltip>
             </Dropdown>
             <Tooltip title="分享公开链接（任何人都可只读访问）">
-              <Button type="text" size="small" onClick={() => handleShare(s)}>
-                🔗
-              </Button>
+              <Button type="text" size="small" icon={<ShareAltOutlined />} onClick={() => handleShare(s)} />
             </Tooltip>
             <Popconfirm title="删除此会话（不可恢复）？" onConfirm={() => handleDelete(s.id)} okText="删除" cancelText="取消">
-              <Button type="text" size="small" danger>
-                🗑
-              </Button>
+              <Button type="text" size="small" danger icon={<DeleteOutlined />} />
             </Popconfirm>
           </div>
         )}
@@ -364,8 +361,22 @@ export default function SessionSidebar({ agentId, activeSessionId, onChange, ref
             value={tab}
             onChange={(v) => setTab(v as any)}
             options={[
-              { value: 'active', label: `💬 活跃 (${active.length})` },
-              { value: 'archived', label: `📦 归档 (${archived.length})` }
+              {
+                value: 'active',
+                label: (
+                  <span style={{ display: 'inline-flex', alignItems: 'center', gap: 6 }}>
+                    <MessageOutlined /> 活跃 ({active.length})
+                  </span>
+                )
+              },
+              {
+                value: 'archived',
+                label: (
+                  <span style={{ display: 'inline-flex', alignItems: 'center', gap: 6 }}>
+                    <InboxOutlined /> 归档 ({archived.length})
+                  </span>
+                )
+              }
             ]}
             style={{ marginBottom: 8 }}
           />