feat(review-ai): 平板 AI 助手面板 MVP

新增功能：
- src/api/review/ai.ts：5 个 AI API（摘要、重建、会话、流式问答、清空）
- 平板页右侧 AI 助手面板（toggleable 抽屉，三栏布局）
  - 摘要状态卡片：未生成/生成中（轮询4s）/已完成/失败
  - 结构化摘要展示：概述/目标/范围/计划/预算/来源文件
  - 共享问答区：历史消息加载 + 流式生成气泡
  - 4个快捷问题按钮
  - 停止生成 / 清空当前项目问答 按钮
  - 回车快捷发送

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

src/api/review/ai.ts

@@ -0,0 +1,99 @@
+import request from '@/config/axios'
+import { fetchEventSource } from '@microsoft/fetch-event-source'
+import { getAccessToken } from '@/utils/auth'
+import { config } from '@/config/axios/config'
+
+// ============================================================
+// 类型定义
+// ============================================================
+
+export const AI_SUMMARY_STATUS = {
+  NOT_BUILT: 0,
+  BUILDING: 1,
+  SUCCESS: 2,
+  FAILED: 3
+} as const
+
+export interface ReviewAiSummaryVO {
+  reviewMeetingProjectId: number
+  status: number
+  statusName: string
+  updatedTime: string | null
+  summaryMarkdown: string | null
+  sourceFileIds: number[]
+  errorMessage: string | null
+  summary: {
+    projectOverview: string
+    businessGoal: string
+    constructionScope: string
+    implementationPlan: string
+    budgetInfo: string
+    keyEntities: string[]
+    readingGuide: string[]
+    sourceFiles: string[]
+  } | null
+}
+
+export interface ReviewAiConversationVO {
+  conversationId: number
+  title: string
+  knowledgeId: number
+}
+
+// ============================================================
+// API 调用
+// ============================================================
+
+/** 获取评审项目 AI 摘要 */
+export const getProjectAiSummary = (reviewMeetingProjectId: number): Promise<ReviewAiSummaryVO> =>
+  request.get({ url: `/project/review-ai/project/${reviewMeetingProjectId}/summary` })
+
+/** 触发重建 AI 摘要（管理端） */
+export const rebuildProjectAiSummary = (reviewMeetingProjectId: number) =>
+  request.post({ url: `/project/review-ai/project/${reviewMeetingProjectId}/rebuild` })
+
+/** 打开 / 获取当前项目共享会话 */
+export const openProjectAiConversation = (
+  reviewMeetingProjectId: number
+): Promise<ReviewAiConversationVO> =>
+  request.post({ url: `/project/review-ai/project/${reviewMeetingProjectId}/conversation/open` })
+
+/** 清空当前项目共享会话消息 */
+export const clearProjectAiMessages = (reviewMeetingProjectId: number) =>
+  request.delete({ url: `/project/review-ai/project/${reviewMeetingProjectId}/chat/messages` })
+
+/**
+ * 流式发送评审项目 AI 消息
+ * 使用 fetchEventSource（axios 不支持 SSE）
+ */
+export const sendProjectAiChatStream = (
+  reviewMeetingProjectId: number,
+  conversationId: number,
+  content: string,
+  ctrl: AbortController,
+  onMessage: (event: any) => void,
+  onError: (error: any) => void,
+  onClose: () => void
+) => {
+  const token = getAccessToken()
+  return fetchEventSource(
+    `${config.base_url}/project/review-ai/project/${reviewMeetingProjectId}/chat/send-stream`,
+    {
+      method: 'post',
+      headers: {
+        'Content-Type': 'application/json',
+        Authorization: `Bearer ${token}`
+      },
+      openWhenHidden: true,
+      body: JSON.stringify({
+        conversationId,
+        content,
+        useContext: true
+      }),
+      onmessage: onMessage,
+      onerror: onError,
+      onclose: onClose,
+      signal: ctrl.signal
+    }
+  )
+}