feat(web): 行动收件箱前端 — API + Drawer + 列表页 + 路由

- actionInbox.ts: API 调用层，list + getThread
- ActionThreadDrawer: 上下文线程抽屉，时间线 + 操作按钮
- ActionInbox: 列表页，Tabs 筛选 + 分页 + 点击打开 Drawer
- App.tsx: 注册 /health/action-inbox 路由

apps/web/src/api/health/actionInbox.ts

@@ -0,0 +1,66 @@
+import client from '../client';
+import type { PaginatedResponse } from '../types';
+
+export type ActionType = 'ai_suggestion' | 'alert' | 'followup' | 'data_anomaly';
+export type ActionPriority = 'urgent' | 'high' | 'medium' | 'low';
+export type ActionStatus = 'pending' | 'in_progress' | 'completed' | 'dismissed';
+
+export interface ActionItem {
+  id: string;
+  action_type: ActionType;
+  priority: ActionPriority;
+  status: ActionStatus;
+  title: string;
+  summary: string;
+  patient_id: string;
+  patient_name: string;
+  source_ref: string;
+  created_at: string;
+  updated_at: string;
+}
+
+export interface ThreadEvent {
+  step: string;
+  label: string;
+  status: ActionStatus;
+  detail?: string;
+  timestamp?: string;
+  operator?: string;
+  link_to?: string;
+}
+
+export interface ActionDefinition {
+  key: string;
+  label: string;
+  variant: 'primary' | 'danger' | 'default';
+  api_endpoint?: string;
+}
+
+export interface ThreadResponse {
+  action_item: ActionItem;
+  thread: ThreadEvent[];
+  available_actions: ActionDefinition[];
+}
+
+export const actionInboxApi = {
+  list: async (params?: {
+    status?: string;
+    type?: string;
+    page?: number;
+    page_size?: number;
+  }) => {
+    const { data } = await client.get<{
+      success: boolean;
+      data: PaginatedResponse<ActionItem>;
+    }>('/health/action-inbox', { params });
+    return data.data;
+  },
+
+  getThread: async (sourceRef: string) => {
+    const { data } = await client.get<{
+      success: boolean;
+      data: ThreadResponse;
+    }>(`/health/action-inbox/${encodeURIComponent(sourceRef)}/thread`);
+    return data.data;
+  },
+};