- Gutter shows both relative offset and absolute line number (like vim number + relativenumber)
- Viewport is cursor-driven with no ScrollArea: cursor stays centered, top/bottom zones clamp naturally
- Scroll wheel moves cursor instead of viewport, j/k scrolling works correctly
- Markdown files render as rich text in Navigate mode (pulldown-cmark), raw source with word-wrap in Edit mode
- Added markdown theme tokens to EditorTheme for headings, code blocks, blockquotes, links

@@ -582,1 +582,4 @@
 
+    /// Search forward for `pattern` starting after `from`. Wraps around.
+    /// Returns the position of the first char of the match, or None.
+    pub fn search_forward(&self, from: Position, pattern: &str) -> Option<Position> {

@@ -0,0 +407,4 @@
+            ..Default::default()
+        };
+        // Pad with thin spaces for visual breathing room
+        self.job.append("\u{2009}", 0.0, format.clone());