SourceGit 2026.08 allalaadimine

What's Changed
- Support to exclude modified/deleted files while discarding local changes.
- Upgrade dependencies
- `AvaloniaUI` to `11.3.13` and build AvaloniaEdit with it.
- `CommunityToolkit.Mvvm` to `8.4.2`
- `LiveChartsCore.SkiaSharpView.Avalonia` to `2.0.0`
- `OpenAI` to `2.10.0`
- Add a context menu entry `Checkout New Branch` for selected stash to run `git stash branch <branch_name> <stash>` command.
- Support to search remote branch in `Set Tracking Branch` and `Add Worktree` popup.
- Dynamic loading and choosing AI model in assistant dialog.
- Fix the issue that duplicated repo may be added when scanning repositories on case-insensitive platform.
- Set `User-Agent` to an empty string when communicating with `OpenAI API` compatible service.
- Allow using arrow down key to directly select branch while searching in `BranchSelector`.
- Fix the issue that failed to create pull request if the remote's URL contains account part.
- Auto-select the new HEAD after reword.
- Allow editing repository's display name and bookmark from the context menu of selected tab.
- Better word division for line-based diff.
- Fix the issue that staged files do not update after committing with `--amend` enabled successfully.
- BREAKING CHANGE: auto-fetch is a global setting instead of per-repo setting now.
- Several other UI/UX changes.