fix: 完善本地与网络图片渲染

apps/desktop/src/app-preload.ts

@@ -5,11 +5,13 @@ import {
   DESKTOP_GET_THEME_CSS,
   DESKTOP_GENERATE_PDF,
   DESKTOP_LIST_THEMES,
+  DESKTOP_OPEN_MARKDOWN,
   DESKTOP_RENDER_MARKDOWN,
   DESKTOP_SAVE_PDF
 } from "./channels.js";
 
 contextBridge.exposeInMainWorld("mdToPdfDesktop", {
+  openMarkdown: () => ipcRenderer.invoke(DESKTOP_OPEN_MARKDOWN),
   renderMarkdown: (input: MarkdownRenderRequest) =>
     ipcRenderer.invoke(DESKTOP_RENDER_MARKDOWN, input),
   listThemes: () => ipcRenderer.invoke(DESKTOP_LIST_THEMES),