Ground work for page editor

frontend/src/types/pageEditor.ts

@@ -0,0 +1,27 @@
+export interface PDFPage {
+  id: string;
+  pageNumber: number;
+  thumbnail: string;
+  rotation: number;
+  selected: boolean;
+  splitBefore?: boolean;
+}
+
+export interface PDFDocument {
+  id: string;
+  name: string;
+  file: File;
+  pages: PDFPage[];
+  totalPages: number;
+}
+
+export interface PageOperation {
+  type: 'rotate' | 'delete' | 'move' | 'split' | 'insert';
+  pageIds: string[];
+  data?: any;
+}
+
+export interface UndoRedoState {
+  operations: PageOperation[];
+  currentIndex: number;
+}