v0.1.2 - Build improvements

- Properly inject version and commit hash into Nix builds
- Fix version output showing 'unknown (built from source)'
- Version now correctly displays as 'herald version 0.1.2 (hash)'

artifacts

v0.1.1 - UI improvements

- Add light/dark theme support with media queries
- Add mobile responsive styling
- Unify keep alive page with site template
- Improve CSS organization

artifacts

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