fix: markdown解析bug

apps/desktop/src/components/EnhancedMarkdownRenderer.tsx

@@ -99,13 +99,13 @@ export const EnhancedMarkdownRenderer: React.FC<EnhancedMarkdownRendererProps> =
       return null;
     }
 
-    // 计算节点在原始文本中的字符偏移位置 
-    const nodeStartOffset = node.range?.start?.offset || 0;
-    const nodeEndOffset = node.range?.end?.offset || 0;
+    // 计算节点在原始文本中的字节偏移位置（与grounding数据的字节偏移匹配）
+    const nodeStartOffset = node.range?.start?.byte_offset || 0;
+    const nodeEndOffset = node.range?.end?.byte_offset || 0;
+
     // 查找与当前节点位置重叠的grounding支持信息
-      
     const relatedSupports = groundingMetadata.grounding_supports.filter(support => {
-      // 这里是字符串二进制的offset
+      // grounding数据使用字节偏移
       const segmentStart = support.segment.startIndex;
       const segmentEnd = support.segment.endIndex;
 
@@ -113,7 +113,11 @@ export const EnhancedMarkdownRenderer: React.FC<EnhancedMarkdownRendererProps> =
       // 检查节点范围与grounding片段是否有重叠
       return hasOverlap;
     });
-
+    console.log({
+      relatedSupports,
+      nodeStartOffset,
+      nodeEndOffset
+    })
     if (relatedSupports.length > 0) {
       // 获取相关的来源信息
       const relatedSources = relatedSupports.flatMap(support =>