fix(reader): skip leading newlines after page split to prevent blank top/bottom

src/reader.rs

@@ -437,6 +437,11 @@ pub fn calculate_pages(text: &str, chars_per_line: usize, lines_per_page: usize)
             if split <= page_start {
                 split = i;
             }
+            if split < total {
+                // Skip leading newlines to prevent starting page with blank line
+                while split < total && chars[split] == '\n' {
+                    split += 1;
+                }
                 if split < total {
                     pages.push(split);
                     page_start = split;
@@ -446,6 +451,7 @@ pub fn calculate_pages(text: &str, chars_per_line: usize, lines_per_page: usize)
                 }
             }
         }
+    }
 
     if *pages.last().unwrap() < total {
         pages.push(total);