feat(ai): 业务上下文感知与 A2UI 链路统一

- 新增代码内业务上下文元数据层（实体字典 + 三大闭环工作流）
- 新增 get_business_context / get_entity_schema / get_pending_tasks 运行时工具
- SYSTEM_PROMPT 与技能目录改为先查业务流程/待办再执行
- A2UI 增加 ai_a2ui_submissions 幂等表、表单过期、ui.artifact 事件
- 提交回灌携带 submissionId / fieldErrors / 下一步建议
- 前端 uiArtifacts 归一化与过期表单禁用

apps/server/src/ai-chat/ai-a2ui-submissions.service.spec.ts

@@ -0,0 +1,69 @@
+import { describe, expect, it, jest } from '@jest/globals';
+import { A2uiSubmissionsService } from './ai-a2ui-submissions.service';
+
+function createService(overrides: Record<string, unknown> = {}) {
+  const repo = {
+    findOne: jest.fn(),
+    save: jest.fn(async (value) => value),
+    create: jest.fn((value) => value),
+    ...overrides,
+  };
+  return { service: new A2uiSubmissionsService(repo as never), repo };
+}
+
+const submission = {
+  id: 1,
+  artifactId: 'form-1',
+  clientRequestId: '4d5c1c2a-1111-4222-8333-444455556666',
+  status: 'created',
+  resultJson: '{"ok":true}',
+  createdAt: new Date(),
+};
+
+describe('A2uiSubmissionsService', () => {
+  it('recordSubmission 首次提交创建记录并标记 created', async () => {
+    const { service, repo } = createService({
+      findOne: jest.fn().mockResolvedValue(null),
+    });
+    const result = await service.recordSubmission({
+      artifactId: submission.artifactId,
+      clientRequestId: submission.clientRequestId,
+      status: 'created',
+      resultJson: submission.resultJson,
+    });
+    expect(result.created).toBe(true);
+    expect(repo.save).toHaveBeenCalledWith(
+      expect.objectContaining({
+        artifactId: submission.artifactId,
+        clientRequestId: submission.clientRequestId,
+      }),
+    );
+  });
+
+  it('recordSubmission 同一 clientRequestId 重复提交返回既有记录且不重复创建', async () => {
+    const { service, repo } = createService({
+      findOne: jest.fn().mockResolvedValue(submission),
+    });
+    const result = await service.recordSubmission({
+      artifactId: submission.artifactId,
+      clientRequestId: submission.clientRequestId,
+      status: 'created',
+      resultJson: '{"ok":false}',
+    });
+    expect(result.created).toBe(false);
+    expect(result.submission).toEqual(submission);
+    expect(repo.save).not.toHaveBeenCalled();
+  });
+
+  it('findSubmission 透传查询条件', async () => {
+    const { service, repo } = createService({
+      findOne: jest.fn().mockResolvedValue(submission),
+    });
+    await expect(
+      service.findSubmission(submission.artifactId, submission.clientRequestId),
+    ).resolves.toEqual(submission);
+    expect(repo.findOne).toHaveBeenCalledWith({
+      where: { artifactId: submission.artifactId, clientRequestId: submission.clientRequestId },
+    });
+  });
+});