## Summary

- Store Windows window minimizable and resizable capabilities on
`WindowsWindowInner`.
- Prevent custom titlebar hit testing from returning minimize/maximize
button hit targets when the corresponding capability is disabled.
- Swallow disabled native non-client minimize/maximize button mouse
events so they cannot fall through to the default window procedure or
GPUI's manual `ShowWindowAsync` handling.

Fixes #52067.

## Validation

- `cargo fmt --package gpui_windows`
- `cargo check -p gpui_windows`
- `git diff --check`

Release Notes:

- Fixed disabled minimize and maximize window controls still activating
on Windows.