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/agent-tools/agent-tools.module.ts

@@ -32,6 +32,10 @@ import { ExpensesModule } from '../expenses/expenses.module';
 import { ClassroomsModule } from '../classrooms/classrooms.module';
 import { ClassroomRentalsModule } from '../classroom-rentals/classroom-rentals.module';
 import { SyncModule } from '../sync/sync.module';
+import { BusinessContextService } from '../agent-context/business-context.service';
+import { PendingTasksService } from '../agent-context/pending-tasks.service';
+import { GetBusinessContextTool, GetEntitySchemaTool } from '../agent-context/get-business-context.tool';
+import { GetPendingTasksTool } from '../agent-context/get-pending-tasks.tool';
 
 /**
  * Agent Tools feature module.
@@ -66,6 +70,11 @@ import { SyncModule } from '../sync/sync.module';
   providers: [
     AgentToolRegistry,
     AgentToolExecutor,
+    BusinessContextService,
+    PendingTasksService,
+    GetBusinessContextTool,
+    GetEntitySchemaTool,
+    GetPendingTasksTool,
     SearchStudentsTool,
     GetStudentBasicTool,
     AgentBusinessScopeFactory,
@@ -107,9 +116,15 @@ export class AgentToolsModule implements OnModuleInit {
     private readonly searchClassroomsTool: SearchClassroomsTool,
     private readonly searchClassroomRentalsTool: SearchClassroomRentalsTool,
     private readonly getSyncStatusTool: GetSyncStatusTool,
+    private readonly businessContextTool: GetBusinessContextTool,
+    private readonly entitySchemaTool: GetEntitySchemaTool,
+    private readonly pendingTasksTool: GetPendingTasksTool,
   ) {}
 
   onModuleInit(): void {
+    this.registry.register(this.businessContextTool);
+    this.registry.register(this.entitySchemaTool);
+    this.registry.register(this.pendingTasksTool);
     this.registry.register(this.searchTool);
     this.registry.register(this.getTool);
     this.registry.register(this.searchClassesTool);