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

tests/unit/coding-teacher-model.test.ts

@@ -76,13 +76,14 @@ describe('teacher published reasoning wire contract', () => {
     const fetch = setup();
     const config = definition({ mode: 'disabled' });
     config.limits.max_input_tokens = 3000;
+    config.system_prompt = '运营配置的超长说明。'.repeat(1000);
     const source = { messages: [], cursor: { workerGeneration: 1, seq: 1 }, capturedAt: 'now' };
     const prepared = await prepareTeacherModel(account, config, {
       projectPath: tmpdir(), source, assertCurrent: () => undefined,
     });
     expect(() => compileTeacherContext(config, source, [], '你好', [], prepared.inputLimit,
       'question', discussionInstructions({ definition: config } as TeacherTopic), true))
-      .toThrow('老师配置或当前整理内容超过上下文预算');
+      .toThrow('智能体配置或当前整理内容超过上下文预算');
     expect(fetch).not.toHaveBeenCalled();
   });
 
@@ -185,7 +186,7 @@ describe('teacher published reasoning wire contract', () => {
   ])('keeps rejecting unsupported choice %j', async (choice, canDisable) => {
     const fetch = setup(Boolean(canDisable));
     await expect(prepareTeacherModel(account, definition(choice)))
-      .rejects.toThrow('老师所用思考选项已不可用，请联系运营调整。');
+      .rejects.toThrow('智能体所用思考选项已不可用，请联系运营调整。');
     expect(fetch).not.toHaveBeenCalled();
   });
 });