[bug] macOS 26.1 “Source Mode” badge is clipped by the window’s rounded corner (Typora 1.12.2)

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Version: 1.12.2 (7519)
OS: macOS 26.1 (25B78) “Tahoe”
Hardware: Mac (Apple silicon)

Summary

When entering Source Mode, Typora shows a rounded “Source Mode” pill in the top-right of the editor’s titlebar area. On macOS 26, app windows have larger system-level rounded corners. The pill is positioned flush against the window’s top-right edge and uses a different corner radius from the window’s mask. As a result, the pill is partially clipped by the window corner and looks visually cut off.

Steps to Reproduce

1. Launch Typora 1.12.2 on macOS 26.1 (25B78).
2. Open any document.
3. Enter View → Source Code Mode (or press ⌘/).
4. Ensure the window is not maximized to the display edges; observe the top-right of the window.

Expected

• The “Source Mode” indicator is fully visible, not intersecting the window’s rounded corner.
• Its shape and radius align with the window’s corner or it is inset enough to avoid clipping.

Actual

• The “Source Mode” pill sits on the very edge of the window.
• Because macOS 26 increases the window corner radius, the system corner mask cuts into the pill, producing a visibly cropped corner.