fix: only h1 headings force page break, not all heading levels

src/reader.rs

@@ -181,7 +181,7 @@ pub fn recalculate_pages(
                 current_height += needed;
             }
 
-            if block.heading_level >= 1 && i + 1 < section.blocks.len() {
+            if block.heading_level == 1 && i + 1 < section.blocks.len() {
                 page_block_ranges.push((page_start_block, i + 1));
                 page_start_block = i + 1;
                 current_height = 0.0;