修正 .docx 佔位符跨 run 匹配：允許 <w:r> 帶屬性

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/contractService.js

@@ -130,7 +130,7 @@ async function removeWorkDir(workDir) {
 }
 
 // Word 會把佔位符拆成多個 run，用這個 pattern 允許相鄰字元之間出現 run 邊界 XML
-const RUN_BOUNDARY = '(?:</w:t></w:r>(?:<w:bookmarkStart[^/]*/?>|<w:bookmarkEnd[^/]*/?>)*<w:r>(?:<w:rPr>[\\s\\S]*?</w:rPr>)?<w:t[^>]*>)?';
+const RUN_BOUNDARY = '(?:</w:t></w:r[^>]*>(?:<w:bookmarkStart[^/]*/?>|<w:bookmarkEnd[^/]*/?>)*<w:r[^>]*>(?:<w:rPr>[\\s\\S]*?</w:rPr>)?<w:t[^>]*>)?';
 
 function buildPlaceholderPattern(placeholder) {
   const chars = [...placeholder].map((c) => c.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'));