v0.3.1

Changelog

• 05a35ad: ci: gofmt fixes for internal/api/http*.go (@css521)
• 632648c: docs: add GitHub Pages site with Chinese and English article (@css521)
• 5e8520e: fix: stop excluding GIF from Jekyll build (@css521)
• f5c8bf5: feat: zero-downtime auto-upgrade for the daemon (@css521)
• f96c96e: release: publish releases (non-draft) so "latest" resolves; date 0.3.1 (@css521)