feat: 新增前端 API 客户端

- 新增 edit.ts: 图片编辑 API 客户端
- 新增 health.ts: 健康检查 API 客户端

frontend/src/api/edit.ts

@@ -0,0 +1,22 @@
+import { post } from './client'
+
+export interface EditImageRequest {
+  image: string // base64 编码
+  prompt: string
+  count?: number
+}
+
+export interface EditAssetResponse {
+  data: string // base64 编码
+  format: string
+}
+
+export interface EditImageResponse {
+  assets: EditAssetResponse[]
+}
+
+export async function editImage(
+  req: EditImageRequest,
+): Promise<EditImageResponse> {
+  return post<EditImageResponse>('/api/v1/images/edit', req)
+}

frontend/src/api/health.ts

@@ -0,0 +1,9 @@
+import { get } from './client'
+
+export interface HealthResponse {
+  status: string
+}
+
+export async function getHealth(): Promise<HealthResponse> {
+  return get<HealthResponse>('/api/v1/health')
+}