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/admin/src/components/AiChat/provider.ts

@@ -8,6 +8,7 @@ import { usePermissionStore } from '../../store/permission/permissionStore';
 import { useUserStore } from '../../store/user/userStore';
 import type {
   AiAttachment,
+  AiArtifactSchema,
   AiChatInput,
   AiChatMessage,
   AiChartSchema,
@@ -34,6 +35,7 @@ interface AiSsePayload {
   durationMs?: number | null;
   attachment?: AiAttachment;
   form?: AiFormSchema;
+  artifact?: AiArtifactSchema;
   review?: AiReviewSchema;
   chart?: AiChartSchema;
   preflight?: AiImportPreflight;
@@ -62,6 +64,7 @@ function emptyAssistant(): AiChatMessage {
     toolRuns: [],
     attachments: [],
     forms: [],
+    uiArtifacts: [],
   };
 }
 
@@ -165,10 +168,50 @@ function applyMessagePayload(
     message.charts,
     (nested.metadata?.a2uiChart as AiChartSchema | AiChartSchema[] | undefined) ?? payload.chart,
   );
+  const artifacts = nested.metadata?.uiArtifacts;
+  if (Array.isArray(artifacts)) {
+    for (const artifact of artifacts) {
+      if (artifact && typeof artifact === 'object' && typeof artifact.id === 'string') {
+        mergeArtifactIntoMessage(message, artifact as AiArtifactSchema);
+      }
+    }
+  }
   message.replyToMessageId = nested.replyToMessageId ?? message.replyToMessageId;
   message.metadata = nested.metadata ?? message.metadata;
 }
 
+/**
+ * 将统一 artifact 归入 uiArtifacts，并按类型派发到 legacy 列表。
+ */
+export function mergeArtifactIntoMessage(
+  message: AiChatMessage,
+  artifact: AiArtifactSchema,
+): AiChatMessage {
+  message.uiArtifacts = mergeById<AiArtifactSchema>(message.uiArtifacts, artifact);
+  const payload =
+    artifact.payload && typeof artifact.payload === 'object'
+      ? (artifact.payload as Record<string, unknown>)
+      : {};
+  if (artifact.type === 'form') {
+    message.forms = mergeForms(message.forms, payload as unknown as AiFormSchema);
+  } else if (artifact.type === 'review') {
+    message.reviews = mergeById<AiReviewSchema>(
+      message.reviews,
+      payload as unknown as AiReviewSchema,
+    );
+  } else if (artifact.type === 'chart') {
+    message.charts = mergeById<AiChartSchema>(
+      message.charts,
+      payload as unknown as AiChartSchema,
+    );
+  } else if (artifact.type === 'import_preflight') {
+    message.metadata = { ...message.metadata, a2uiImportPreflight: payload };
+  } else if (artifact.type === 'import_wizard') {
+    message.metadata = { ...message.metadata, a2uiImportWizard: payload };
+  }
+  return message;
+}
+
 export function reduceAiSseMessage(
   originMessage: AiChatMessage | undefined,
   chunk?: AiSseChunk,
@@ -198,6 +241,8 @@ export function reduceAiSseMessage(
     message.reviews = mergeById<AiReviewSchema>(message.reviews, payload.review);
   } else if (event === 'ui.chart' && payload.chart) {
     message.charts = mergeById<AiChartSchema>(message.charts, payload.chart);
+  } else if (event === 'ui.artifact' && payload.artifact) {
+    mergeArtifactIntoMessage(message, payload.artifact);
   } else if (event === 'ui.import_preflight' && payload.preflight) {
     message.metadata = { ...message.metadata, a2uiImportPreflight: payload.preflight };
   } else if (event === 'ui.import_wizard' && payload.wizard) {
@@ -319,6 +364,7 @@ export class GongxueAiChatProvider extends AbstractChatProvider<
 > {
   /** Routes events that target another (already streamed) message. */
   onExternalReview?: (messageId: number, review: AiReviewSchema) => void;
+  onExternalArtifact?: (messageId: number, artifact: AiArtifactSchema) => void;
 
   constructor(url: string, onSettled?: (result?: { ok: boolean; aborted?: boolean }) => void) {
     super({
@@ -404,6 +450,30 @@ export class GongxueAiChatProvider extends AbstractChatProvider<
 
   transformMessage(info: TransformMessage<AiChatMessage, AiSseChunk>): AiChatMessage {
     const { event, payload } = parseSsePayload(info.chunk);
+    if (
+      event === 'ui.artifact' &&
+      payload.artifact &&
+      typeof payload.messageId === 'number' &&
+      info.originMessage?.id !== payload.messageId
+    ) {
+      this.onExternalArtifact?.(payload.messageId, payload.artifact);
+      return info.originMessage ?? emptyAssistant();
+    }
+    if (
+      event === 'ui.form' &&
+      payload.form &&
+      typeof payload.messageId === 'number' &&
+      info.originMessage?.id !== payload.messageId
+    ) {
+      this.onExternalArtifact?.(payload.messageId, {
+        id: payload.form.id,
+        type: 'form',
+        status: payload.form.status ?? 'pending',
+        messageId: payload.messageId,
+        payload: payload.form,
+      });
+      return info.originMessage ?? emptyAssistant();
+    }
     if (
       event === 'ui.review' &&
       payload.review &&