Documents: inline code in a sixth-level heading keeps its own color

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/documents/document/tests/open_look.rs

@@ -66,7 +66,7 @@ fn open_front_matter_keeps_its_panel(cx: &mut TestAppContext) {
     keeps_its_panel("---\nkey: value\n---\n\nText.\n", cx);
 }
 
-/// Block 0 opens in place, its panel at the closed inset.
+/// Block 0 opens with its panel at the closed inset.
 fn keeps_its_panel(source: &str, cx: &mut TestAppContext) {
     let (closed, open, cx) = closed_then_open(source, cx);
     assert!(
@@ -137,6 +137,8 @@ fn an_open_sixth_heading_stays_muted(cx: &mut TestAppContext) {
         .color,
         fg
     );
+    let code = run("###### Quiet `Code`\n", "Code", cx);
+    assert_eq!(code.color, fg, "code keeps its own color");
 }
 
 /// The open text box's style for `kind`.

src/documents/markdown.rs

@@ -180,7 +180,7 @@ pub fn markdown_highlights(text: &str, cx: &App) -> Vec<(Range<usize>, Highlight
                 },
                 Mark::Code => Highlight {
                     background: Some(colors.sunken),
-                    ..plain
+                    ..Highlight::new(colors.fg)
                 },
                 Mark::Link => Highlight::new(colors.link),
                 Mark::Quote => Highlight::new(colors.fg_muted),