AstrBot Desktop v4.27.2

Automated desktop package release.

• Source: https://github.com/AstrBotDevs/AstrBot.git
• Ref: v4.27.2
• Mode: tag-poll
• Windows package formats: nsis installer and portable zip.
• Windows portable zip uses manual replacement updates and requires WebView2 to already exist on the host.

What's Changed

• fix: disable WebKit DMABuf renderer on Linux by @zouyonghe in #148
• fix: use astrbot-desktop as Linux package name by @zouyonghe in #149
• refactor: clarify desktop-managed backend markers by @zouyonghe in #150
• fix: prevent silent launch window flash by @zouyonghe in #151

Full Changelog: v4.26.4...v4.27.2