R6.9: ElyMark headings step up from the body, all bold

Component 5954132 sizes headings by Typora's steps over the body.
Checked in a real Windows window with R6.7 and R6.8.

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

Cargo.toml

@@ -19,7 +19,7 @@ jiff = "0.2"
 anyhow = "1"
 directories = "6"
 dunce = "1"
-ely-gpui-component = { git = "https://git.zacharyzhang.com/ZacharyZhang-NY/Ely-GPUI-Components", rev = "9fb607beb4729e3e8173bd0d86eddb0d880e02f6" }
+ely-gpui-component = { git = "https://git.zacharyzhang.com/ZacharyZhang-NY/Ely-GPUI-Components", rev = "5954132e76631e63c86840ed4f450d25e0613143" }
 env_logger = "0.11"
 gpui = { package = "gpui-pre", version = "=0.3.8", default-features = false, features = ["stacker"] }
 gpui_platform = { package = "gpui-pre-platform", version = "=0.3.8", features = ["font-kit", "wayland", "x11"] }