添加8.9页面

src/electron.d.ts

@@ -0,0 +1,10 @@
+// Electron API 类型声明
+interface ElectronAPI {
+  fetchPdf: (pdfUrl: string) => Promise<{ success: boolean; data?: string; error?: string }>;
+  printPdf: (pdfUrl: string) => Promise<{ success: boolean; error?: string }>;
+}
+
+interface Window {
+  electronAPI?: ElectronAPI;
+}
+