Merge teacher composer and compact prompt UI into main

src/pages/Chat/CodingChatPanel.tsx

@@ -47,6 +47,9 @@ import { CodingConversationHeader } from './CodingConversationHeader';
 import { CodingConversationTimeline } from './CodingConversationTimeline';
 import { CodingInteractionPanel } from './CodingInteractionPanel';
 import { CodingWelcomeHero } from './CodingWelcomeHero';
+import { CodingStartHeading } from './CodingStartHeading';
+import { CodingChatBody } from './CodingChatBody';
+import { CommunityInvitation } from '@/components/community/CommunityInvitation';
 import { createLocalConversationSnapshot } from './coding-chat-snapshot';
 import { useAuthStore } from '@/stores/auth';
 import { TeacherChatPanel } from './TeacherChatPanel';
@@ -676,6 +679,8 @@ export function CodingChatPanel({
     });
   }, [loginRecovery, activeProject, targetConversationId, entryLoadState, workspaceLoadState, handleRecovery, draftKey, onLoginRecoveryConsumed]);
   const autoCreating = Boolean(selectedAgent && creatingAgentIds[selectedAgent.id]);
+  const showWelcome = editable && !selectedConversation?.archivedAt && !running && runStatus === 'idle'
+    && (!targetConversationId || (entryLoadState === 'live' && snapshot?.nodes.length === 0));
 
   if (!activeProject && workspaceLoadState !== 'loading') {
     return (
@@ -770,9 +775,8 @@ export function CodingChatPanel({
           onRecover={async () => {
             if (targetConversationId) await handleRecovery(codingRecovery(runtimeError?.code).action, false);
           }}
-          browserOpen={agentBrowserOpen}
-          browserAvailable={Boolean(activeProject)}
-          onToggleBrowser={() => setAgentBrowserOpen((current) => !current)}
+          consultationAvailable={Boolean(activeProject)}
+          onToggleConsultation={() => setConsultationOpen((current) => !current)}
           projectName={activeProject?.name}
           consultationOpen={consultationOpen}
           teacherEntry={activeProject ? <TeacherCompanion companion={teacherCompanion} open={consultationOpen} onOpen={openTeacher} onToggle={toggleTeacher} bubbleRef={setTeacherBubble} introductionRef={setTeacherIntroduction} /> : undefined}
@@ -807,6 +811,7 @@ export function CodingChatPanel({
               }
             }} />
         </div>
+        <CodingChatBody welcome={showWelcome} hidden={agentBrowserOpen} bubble={teacherBubble}>
         <div id="classroom-chat-view" role="tabpanel" aria-labelledby="classroom-chat-tab" hidden={agentBrowserOpen} className="classroom-chat-view min-h-0 flex-1 flex-col">
 
         {(workspaceError || conversationMetadataError || connectionError) && (
@@ -829,7 +834,7 @@ export function CodingChatPanel({
           </div>
         )}
 
-        {targetConversationId
+        {showWelcome ? <CodingStartHeading /> : targetConversationId
           ? (
             <CodingConversationTimeline
               key={targetConversationId}
@@ -892,6 +897,7 @@ export function CodingChatPanel({
 
         </div>
         <div hidden={agentBrowserOpen} className="classroom-composer-view shrink-0">
+        {showWelcome && <CommunityInvitation />}
         {selectedConversation?.archivedAt ? (
           <div className="m-4 flex items-center justify-between gap-3 rounded-xl border bg-surface-subtle px-4 py-3 text-sm">
             <span>{running ? '此对话已归档，任务仍在运行。' : '此对话已归档，恢复后可继续聊天。'}</span>
@@ -959,6 +965,7 @@ export function CodingChatPanel({
           }}
         />}
         </div>
+        </CodingChatBody>
       </div>
 
       {consultationOpen && activeProject && (