feat(termux): launch 侧同样改写 arm64 natives；真机跑通 MC 1.20.4

- Library::linux_arm64_native_name 收敛改写规则，install 与 launch 共用
- presenter/CLI 的 classpath 组装：1.19+ 的独立 natives 条目按 arm64 坐标
  找文件并进 classpath；≤1.18 的 natives 表条目仍归 natives::collect
- 真机验证：ull install 1.20.4（740MB）→ glibc Temurin 21 + arm64 natives +
  softpipe GL，MC 主菜单在 termux-x11 中渲染（窗口 854x480）
- 已知非致命：narrator flite 缺失、LWJGL JNI 版本告警、oshi cpuVendor NPE

crates/core/src/game/install/libraries.rs

@@ -159,10 +159,8 @@ struct Arm64Native {
 
 /// Linux arm64：把 `org.lwjgl:<module>:<version>:natives-linux` 改写成 arm64。
 fn linux_arm64_native_entry(library: &Library, env: &Environment) -> Option<Arm64Native> {
-    if env.os != "linux" || env.arch != "arm64" || !library.name.starts_with("org.lwjgl:") {
-        return None;
-    }
-    let base = library.name.strip_suffix(":natives-linux")?;
+    let name = library.linux_arm64_native_name(env)?;
+    let base = name.strip_suffix(":natives-linux-arm64")?;
     let mut parts = base.split(':');
     let group = parts.next()?;
     let artifact = parts.next()?;
@@ -179,7 +177,7 @@ fn linux_arm64_native_entry(library: &Library, env: &Environment) -> Option<Arm6
         relative.to_string_lossy().replace('\\', "/")
     );
     Some(Arm64Native {
-        name: format!("{base}:natives-linux-arm64"),
+        name,
         relative,
         url,
     })