Release v0.2.7

• Settings: Deleted prop-injected servers (e.g. the default GitHub Pages server) now stay removed after a page reload instead of reappearing on every visit. (@isomoes)
• UI: Removed session sharing actions from the session header to simplify the interface. (@isomoes)
• Settings: Narrowed built-in i18n support to English and Chinese, removing unmaintained locale files to improve translation quality going forward. (@isomoes)
• Docs: Refreshed the README and Quick Start guide with clearer setup instructions; removed unused internal documentation files. (@isomoes)