documents and editor: a writing view - measure, font, scale, focus fading, typewriter centering

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

src/editor/mod.rs

@@ -33,6 +33,7 @@ mod tasks;
 mod tests;
 mod view;
 mod welcome;
+mod writing;
 
 pub use buffer::Buffer;
 pub use chat::InlineChat;