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;