Merge teacher composer actions into latest main

src/pages/Chat/TeacherChatPanel.tsx

@@ -16,7 +16,6 @@ import { TeacherReply } from './TeacherReply';
 import { MessageTimestamp } from './MessageTimestamp';
 import { ComposerVoiceButton } from './ComposerVoiceButton';
 import { useWorksVoiceInput } from '@/hooks/use-works-voice-input';
-import { TeacherModelSelect } from './TeacherModelSelect';
 import { useTeacherModelChoice } from '@/hooks/use-teacher-model-choice';
 
 // Preserve loaded pages and the reading anchor while moving between contacts.
@@ -635,8 +634,6 @@ function ProjectTeacherChatPanel({
             className="min-h-[60px] w-full resize-none border-0 bg-transparent text-[13px] leading-6 outline-none placeholder:text-muted-foreground/65" />
           <div className="mt-2 flex min-h-[68px] flex-wrap items-center justify-between gap-x-2 gap-y-2" data-testid="consultation-composer-actions">
             <div className="ml-auto flex min-w-0 max-w-full items-center gap-1" data-testid="teacher-composer-runtime-controls">
-              <TeacherModelSelect key={modelScope + (definition?.runtime ?? 'local')} runtime={definition?.runtime ?? 'local'} scope={modelScope} defaultModel={definition?.model.model_id}
-                modelId={modelChoice.modelId} onChange={modelChoice.select} disabled={busy || !topicEnabled || Boolean(running)} />
               <ComposerVoiceButton voiceInput={voiceInput} />
             {running ? <button type="button" className="rounded-lg border px-3 py-2 text-xs" onClick={() => void teacherApi.cancel(topicBase, endpointId, running.id).then(consume).catch(() => setError('暂时无法停止，请稍后重试。'))}>停止回复</button>
             : <button type="submit" aria-label="提问" title={busy ? '正在发送…' : '发送'} disabled={busy || !topicEnabled || !text.trim() || voiceInput.state !== 'idle'} className="consultation-send flex h-8 w-8 shrink-0 items-center justify-center rounded-full text-white disabled:opacity-30"><ArrowUp className="h-4 w-4" /></button>}