Feature stage labels disappear when version is removed from path

[blink-so]

Issue Description

When removing the version from the path, the feature stage labels disappear, seemingly because it doesn't know the current version (the veresion picker is also confused).

Additional Context

• The version picker is also empty when this occurs
• Expected behavior: Should default to mainline when version is removed
• Actual behavior: Feature stage labels disappear entirely

Reproduction

See attached screen recording for visual demonstration of the issue.

[phorcys420]

Screen.Recording.2025-07-28.at.01.25.02.mov