Hoàn thành bước 3.3. Interactive Workbook (The Core Viewer)

frontend/src/lib/api.ts

@@ -36,4 +36,13 @@ export const api = {
   uploadPdfs: (formData: FormData) =>
     request<import("@/types").PDFUploadResult[]>("/api/pdfs/upload", { method: "POST", body: formData }),
   deletePdf: (id: number) => request<void>(`/api/pdfs/${id}`, { method: "DELETE" }),
+
+  // Annotations
+  getAnnotation: (pdfId: number, page: number) =>
+    request<import("@/types").AnnotationData>(`/api/annotations/${pdfId}/${page}`),
+  upsertAnnotation: (pdfId: number, page: number, body: { canvas_data: object }) =>
+    request<import("@/types").AnnotationData>(`/api/annotations/${pdfId}/${page}`, {
+      method: "PUT",
+      body: JSON.stringify(body),
+    }),
 };