Draft 0.4

Code blocks get colour: the fence lines go grey, and the code inside is coloured by the language you name after the fence (Swift, JavaScript/TypeScript, Python, shell, Go, Rust, the C family, Ruby, Lua, SQL, JSON, YAML, CSS, HTML and more). Mermaid diagrams now draw, using Pele: in the preview, and right in the editor, where eachmermaid block shows the diagram with buttons to switch to the source or both. The Preview button now opens side by side with the editor.

程式碼區塊有顏色了：那兩行變灰，裡面的程式碼依照 後面寫的語言上色（Swift、JavaScript／TypeScript、Python、shell、Go、Rust、C 系列、Ruby、Lua、SQL、JSON、YAML、CSS、HTML 等）。Mermaid 圖表現在會畫出來（用 Pele）：預覽裡有，編輯器裡也有，每個 ```mermaid 區塊顯示圖，右上角可切換成源碼或兩者並列。按預覽按鈕現在預設和編輯器左右分割。

Requires macOS 14 or later on Apple silicon. ／ 需要 macOS 14 以上、Apple 晶片。