fix: allow selecting agent on /chat in h5

src/pages/chat/components/ChatPageH5.tsx

@@ -86,29 +86,29 @@ export default function ChatPageH5({ logic }: { logic: ChatPageLogicOutput }) {
       </Drawer>
 
       <section className="chat-main h5-chat-main">
+        <div style={{ padding: '8px 12px', borderBottom: '1px solid var(--color-border)' }}>
+          <Space>
+            <Button size="small" onClick={() => setAgentDrawerOpen(true)}>
+              智能体
+            </Button>
+            <Button size="small" disabled={!agent} onClick={() => setOutlineDrawerOpen(true)}>
+              大纲
+            </Button>
+            <Button size="small" disabled={!id} onClick={() => setHistoryDrawerOpen(true)}>
+              历史对话
+            </Button>
+            <Button size="small" type="primary" disabled={!id} onClick={handleNewSession}>
+              新建会话
+            </Button>
+          </Space>
+        </div>
+
         {!agent ? (
           <div style={{ flex: 1, display: 'flex', alignItems: 'center', justifyContent: 'center' }}>
             <Empty description="请选择一个智能体开始对话" />
           </div>
         ) : (
           <>
-            <div style={{ padding: '8px 12px', borderBottom: '1px solid var(--color-border)' }}>
-              <Space>
-                <Button size="small" onClick={() => setAgentDrawerOpen(true)}>
-                  智能体
-                </Button>
-                <Button size="small" onClick={() => setOutlineDrawerOpen(true)}>
-                  大纲
-                </Button>
-                <Button size="small" onClick={() => setHistoryDrawerOpen(true)}>
-                  历史对话
-                </Button>
-                <Button size="small" type="primary" onClick={handleNewSession}>
-                  新建会话
-                </Button>
-              </Space>
-            </div>
-
             <ChatHeader
               agent={agent}
               useStream={sender.useStream}