fix footnote detection

src/markdown.rs

@@ -318,10 +318,14 @@ fn calculate_font_stats(lines: &[TextLine]) -> FontStats {
 
     for line in lines {
         for item in &line.items {
+            // Only count fonts >= 9pt as potential body text
+            // Smaller fonts are typically table cells, footnotes, or captions
+            if item.font_size >= 9.0 {
                 let size_key = (item.font_size * 10.0) as i32; // Round to 0.1
                 *size_counts.entry(size_key).or_insert(0) += 1;
             }
         }
+    }
 
     let most_common_size = size_counts
         .iter()