chore: 版本号 0.2.4（里程碑快照；本批含存档截图/强调色/回车提交/GPU 门禁/签名就绪度）

README.md

@@ -5,7 +5,7 @@
 > **Official project home**: <https://github.com/AskaEth/Unlucky-Launcher> ｜ downloads, issues and
 > release notes all live there: <https://github.com/AskaEth/Unlucky-Launcher/releases>
 >
-> **Version in this README: `0.2.3`** — `unlucky-launcher --version` prints the same number.
+> **Version in this README: `0.2.4`** — `unlucky-launcher --version` prints the same number.
 
 Unlucky Launcher is a free, open-source **Minecraft: Java Edition** launcher written in Rust
 (Apache-2.0). It ships as **one native binary per platform** — no installer, no bundled runtime, no