Editor discovery and one-click opening

Desktop Material discovers a broad curated set of installed Windows editors, including Visual Studio Code/VSCodium variants, JetBrains IDEs, Sublime Text, and Vim/Neovim front ends. Users may instead configure a custom Windows executable and arguments.

The chosen editor is available from repository rows, the Changes empty state, changed-file context menus, conflict rows, and the diff header. File actions open the selected path; repository actions open the working tree. Repository Settings can override the app-level editor without affecting another repo.

Discovery checks known application registrations or executable locations and never launches candidates merely to detect them. Launches use executable plus argument arrays instead of a command shell. Custom integrations have explicit timeout/output/error handling, and a missing executable routes to Preferences without changing Git state.

WSL-targeted Visual Studio Code entries are documented separately in WSL-aware editor opening.

Verification includes Windows editor discovery suites, custom integration argument tests, repository override tests, and the diff-header/context-menu UI tests. See Windows-only platform support for the release and CI boundary.