fix: don't use h1 anchor in search result URLs

h1 represents the page itself, not a section. Text following h1
should link to the page without a #fragment. h2–h6 anchors are
preserved as before.

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

Author: spicyfalafel

src/scraper.ts

@@ -258,7 +258,8 @@ export async function scrapePage(
         }
 
         // Save anchor from heading for text content that follows
-        lastHeadingAnchor = element.id || undefined;
+        // lvl1 (h1) is the page itself, not a section — don't use its anchor
+        lastHeadingAnchor = level >= 2 ? (element.id || undefined) : undefined;
         break;
       }
     }