feat(consultation): unify server-distributed agents without fixed roles

tests/e2e/fixtures/teacher-preview-layout.tsx

@@ -34,8 +34,8 @@ export function Layout() {
       </main>
       {open && <aside id="coding-consultation-dock" className="classroom-consultation-dock consultation-pane shrink-0 border-l p-5" style={{ width }}>
         <p className="mb-8 text-sm">老师对话（布局测试）</p>
-        <label className="block text-xs">老师栏宽度<input aria-label="老师栏宽度" type="range" min="320" max="640" value={width} onChange={(event) => setWidth(Number(event.target.value))} /></label>
-        <button className="mt-6 text-xs" onClick={() => setOpen(false)}>关闭老师栏</button>
+        <label className="block text-xs">智能体栏宽度<input aria-label="智能体栏宽度" type="range" min="320" max="640" value={width} onChange={(event) => setWidth(Number(event.target.value))} /></label>
+        <button className="mt-6 text-xs" onClick={() => setOpen(false)}>关闭智能体栏</button>
       </aside>}
     </div>
     <footer className="flex shrink-0 gap-5 border-t p-2 text-xs">