feat(web-admin): generate contract DOCX blob from prepared HTML

Co-authored-by: Cursor <cursoragent@cursor.com>

web-admin/src/utils/crm/contract-html-to-docx.ts

@@ -1,5 +1,33 @@
 /** 合同打印弹窗：HTML → DOCX 预处理与生成 */
 
+import HTMLtoDOCX from '@turbodocx/html-to-docx'
+
+const DOCX_MIME = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
+
+/**
+ * 将已预处理的合同 HTML 转为 DOCX Blob（浏览器下载用）。
+ * 调用方须先执行 prepareContractHtmlForDocx。
+ */
+export async function generateContractDocxBlob(
+  preparedHtml: string,
+  title?: string
+): Promise<Blob> {
+  const fullHtml = `<!DOCTYPE html><html><head><meta charset="UTF-8" /></head><body>${preparedHtml}</body></html>`
+  const result = await HTMLtoDOCX(fullHtml, null, {
+    orientation: 'portrait',
+    title: title || '合同',
+    margins: {
+      top: 720,
+      right: 720,
+      bottom: 720,
+      left: 720
+    }
+  })
+
+  if (result instanceof Blob) return result
+  return new Blob([result as ArrayBuffer], { type: DOCX_MIME })
+}
+
 export function parseContractSupplierCode(contractNo?: string | null): string {
   if (!contractNo) return 'SX'
   const match = String(contractNo).match(/^([A-Z]+)\/X-JT/)