first pass of merging in warp (doesn't build)

crates/editor/test_fixtures/README.md

@@ -14,3 +14,9 @@ The `images/` directory contains sample images and a test markdown file (`image_
 - Empty alt text
 
 To test image rendering, open `images/image_test.md` in Warp.
+
+## ToC Navigation
+
+`toc_anchor_test.md` covers manual validation for Markdown fragment link navigation (case-insensitive heading matching and scrolling).
+
+To test, open `toc_anchor_test.md` in Warp's Markdown viewer and click the table-of-contents links.

crates/editor/test_fixtures/toc_anchor_test.md

@@ -0,0 +1,29 @@
+# Markdown ToC Manual Test
+
+Use this file in a Warp notebook to verify fragment link navigation.
+
+## Table of contents
+
+- [Basic heading](#Basic heading)
+- [Mixed Case](#Mixed CASE Heading)
+- [Bottom target](#Bottom target)
+
+## Basic heading
+
+Expected: clicking `Basic heading` scrolls here via case-insensitive heading match.
+
+## Mixed CASE Heading
+
+Expected: clicking `Mixed Case` scrolls here (case-insensitive).
+
+## Scroll padding section 1
+
+This filler makes scrolling visible.
+
+## Scroll padding section 2
+
+This filler makes scrolling visible.
+
+## Bottom target
+
+Expected: clicking `Bottom target` from the TOC scrolls near the bottom.