Incorrectly disabled "Commit directly to the main branch." UI selection with a branch rule

[ivan-usov]

Description

1. Create a repository, add an empty file foo_file
2. Add a branch rule that protects the main branch, but "unprotects" this file:

3. Edit foo_file via gitea UI. The "Commit directly to the main branch." is greyed out, even though it's possible to push the change directly to the main branch in that situation. Pushing a commit via git cli works as expected.

Screenshots

Gitea Version

Version: 1.27.0+dev-210-g67f86bc3fe

Can you reproduce the bug on the Gitea demo site?

Yes

Operating System

Ubuntu 24.04

Browser Version

Firefox 150.0.2 (64-bit)