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

tests/e2e/fixtures/teacher-discussion-api.ts

@@ -1,7 +1,7 @@
 // Deterministic responses for layout/interaction tests only; never imported by the app.
 import type { TeacherDefinition, TeacherTopic, TeacherSend, TeacherDiscussionAction } from '../../../shared/coding-teacher';
 import type { TeacherDiscussionContent } from '../../../shared/teacher-discussion';
-const definition: TeacherDefinition = { schema_version: 1, teacher_id: 'coding-teacher', name: '麦洛老师', description: '', avatar_id: 'avatar-01', welcome_message: '', suggested_questions: [], system_prompt: '测试', skills: [], model: { model_id: 'fixture', reasoning_choice: { mode: 'default' } }, limits: { max_input_tokens: 8000, max_output_tokens: 1500 } };
+const definition: TeacherDefinition = { schema_version: 1, teacher_id: 'coding-teacher', name: '麦洛智能体', description: '', avatar_id: 'avatar-01', welcome_message: '', suggested_questions: [], system_prompt: '测试', skills: [], model: { model_id: 'fixture', reasoning_choice: { mode: 'default' } }, limits: { max_input_tokens: 8000, max_output_tokens: 1500 } };
 const samples: Record<string, TeacherDiscussionContent> = {
   ideas: { kind: 'ideas', title: '我的小狗世界', items: [{ id: 'dog', text: '养一只自己的小狗', state: 'kept' }, { id: 'breed', parentId: 'dog', text: '是一只柯基', state: 'kept' }, { id: 'garden', text: '有一片可以种东西的花园', state: 'kept' }, { id: 'food', parentId: 'garden', text: '种出来的东西可以喂小狗', state: 'suggested' }] },
   structure: { kind: 'structure', title: '小狗和花园怎么连起来？', nodes: [{ id: 'world', label: '我的小狗世界' }, { id: 'dog', label: '照顾小狗', parentId: 'world' }, { id: 'breed', label: '一只柯基', parentId: 'dog', relation: '它的样子' }, { id: 'garden', label: '种植花园', parentId: 'world' }, { id: 'food', label: '收获食物，喂给小狗', parentId: 'garden', relation: '收获后' }] },
@@ -9,7 +9,7 @@ const samples: Record<string, TeacherDiscussionContent> = {
   comparison: { kind: 'comparison', title: '哪一种更像你想要的小狗？', columns: [{ id: 'click', label: '点了才回应' }, { id: 'active', label: '会主动找我' }], rows: [{ id: 'home', label: '刚回到家的时候', cells: [{ columnId: 'click', text: '等我点一下，才跳起来。' }, { columnId: 'active', text: '看见我就跑过来，还带着玩具。' }] }, { id: 'busy', label: '我忙着种东西的时候', cells: [{ columnId: 'click', text: '安静等着，不打扰我。' }, { columnId: 'active', text: '有时来蹭一蹭，可能也会打断我。' }] }] },
 };
 const scenario = new URLSearchParams(location.search).get('kind') ?? 'ideas';
-let current: TeacherTopic = { schemaVersion: 1, revision: 1, id: 'discussion-fixture', accountId: 'fixture', projectId: 'fixture', sourceConversationId: 'project', role: 'teacher', definition, version: 1, createdAt: 'now', updatedAt: 'now', requests: Array.from({ length: 8 }, (_, i) => ({ id: `r${i}`, text: i === 7 ? '我还没想好，我们边聊边想。' : '我希望这个游戏更有意思。', references: [], createdAt: 'now', sourceCursor: { workerGeneration: 0, seq: i }, sourceCapturedAt: 'now', includedSourceMessageIds: [], omittedMessages: 0, status: 'completed', response: i === 7 ? '可以，我们先把已经想到的放在一起。哪里还不确定，就留着继续聊。' : '先从你最在意的一个小地方开始想。', ...(scenario === 'ordinary' && i === 7 ? { suggestedQuestions: ['有什么好玩的想法？'] } : {}) })), ...(samples[scenario] ? { discussion: { id: 'tool', revision: 1, status: 'active', content: structuredClone(samples[scenario]), ...(scenario === 'structure' ? { previousIdeas: structuredClone(samples.ideas) as Extract<TeacherDiscussionContent, { kind: 'ideas' }> } : {}) } } : {}) };
+let current: TeacherTopic = { schemaVersion: 1, revision: 1, id: 'discussion-fixture', accountId: 'fixture', projectId: 'fixture', sourceConversationId: 'project', definition, version: 1, createdAt: 'now', updatedAt: 'now', requests: Array.from({ length: 8 }, (_, i) => ({ id: `r${i}`, text: i === 7 ? '我还没想好，我们边聊边想。' : '我希望这个游戏更有意思。', references: [], createdAt: 'now', sourceCursor: { workerGeneration: 0, seq: i }, sourceCapturedAt: 'now', includedSourceMessageIds: [], omittedMessages: 0, status: 'completed', response: i === 7 ? '可以，我们先把已经想到的放在一起。哪里还不确定，就留着继续聊。' : '先从你最在意的一个小地方开始想。', ...(scenario === 'ordinary' && i === 7 ? { suggestedQuestions: ['有什么好玩的想法？'] } : {}) })), ...(samples[scenario] ? { discussion: { id: 'tool', revision: 1, status: 'active', content: structuredClone(samples[scenario]), ...(scenario === 'structure' ? { previousIdeas: structuredClone(samples.ideas) as Extract<TeacherDiscussionContent, { kind: 'ideas' }> } : {}) } } : {}) };
 const stream = Object.assign(new EventTarget(), { close() {}, onerror: null, onopen: null });
 let timer: ReturnType<typeof setTimeout> | undefined;
 const snapshot = () => { current.revision++; stream.dispatchEvent(new MessageEvent('snapshot', { data: JSON.stringify(current) })); };
@@ -63,3 +63,5 @@ export const teacherApi = {
   cancel: async () => { clearTimeout(timer); current.requests.at(-1)!.status = 'cancelled'; snapshot(); return structuredClone(current); },
 };
 export const teacherTopicsPath = () => '/fixture';
+
+export const legacyTopicBase = (base: string) => base;