feat: 实现 DOCX 媒体预处理与跨端 PNG 捕获

apps/web/src/paged-preview-frame.ts

@@ -3,6 +3,7 @@ import {
   isPagedPreviewRenderRequest,
   PAGED_PREVIEW_MESSAGE_SCOPE,
   PagedDocumentRuntime,
+  renderDocxMediaCapturePlan,
   resolveMermaidOutputMode,
   resolvePagedRenderTarget,
   type PagedPreviewFrameMessage,
@@ -137,6 +138,13 @@ window.__mdToPdfRender = async (
   }
   return result;
 };
+window.__mdToPdfRenderDocxMedia = (payload, dimensions) =>
+  renderDocxMediaCapturePlan(
+    runtime,
+    previewRoot,
+    payload,
+    dimensions
+  );
 document.documentElement.dataset.runtimeReady = "true";
 
 const desktopPdfBridge = window.__mdToPdfDesktopPdf;

apps/web/src/vite-env.d.ts

@@ -1,6 +1,7 @@
 /// <reference types="vite/client" />
 
 import type {
+  DocxMediaCapturePlan,
   PagedDocumentPayload,
   PagedDocumentRenderResult,
   RenderedMarkdownDocument,
@@ -96,5 +97,12 @@ declare global {
   interface Window {
     mdToPdfDesktop?: DesktopApplicationBridge;
     __mdToPdfDesktopPdf?: DesktopPdfRuntimeBridge;
+    __mdToPdfRenderDocxMedia?: (
+      payload: PagedDocumentPayload,
+      dimensions: {
+        contentWidthPx: number;
+        contentHeightPx: number;
+      }
+    ) => Promise<DocxMediaCapturePlan>;
   }
 }