dev(runtime-host): build target-aware host packages

[M4n5ter]

Summary

Development Desktop setup now resolves Runtime Host packages against the target environment instead of the Desktop process platform.

• make the development package target an explicit, typed resolver input and cache archives per target
• probe SSH host OS/architecture before development setup or update
• keep WSL framed-stdio packages peer-less, so Windows-to-WSL development does not require Rust, Zig, or a host-native addon
• build supported Linux cross-target addons with cargo-zigbuild, with actionable prerequisite and unsupported-target failures
• leave published release packaging unchanged

Fixes #4085

中文说明

开发版 Desktop setup 现在按目标环境解析 Runtime Host package，不再错误地使用 Desktop 进程所在平台。

• 将开发 package target 变成显式、类型安全的 resolver 输入，并按 target 缓存 archive
• 在开发版 SSH setup/update 前探测目标 OS/架构
• WSL framed-stdio 使用不含 direct-peer addon 的 package，因此 Windows 到 WSL 的开发流程不要求 Rust、Zig 或宿主机 native addon
• 支持的 Linux 跨目标 addon 使用 cargo-zigbuild；缺少依赖或目标不支持时尽早给出可操作错误
• 正式发布的打包行为保持不变

关闭 #4085。

Verification

• npm run lint
• npm run format:check
• npm run typecheck
• mise x node@24.18.1 -- npm run check:release — 110 passed
• affected compiled Desktop suites — 40 passed
• built a real none development archive and verified it contains no direct-peer prebuild
• built a real linux-arm64 archive from Linux x64 and verified its addon is an AArch64 ELF
• Windows Electron → fresh Maka-Test WSL setup, project selection, and real session completed with WSL_TARGET_PACKAGE_OK; the generated WSL archive contained no direct-peer prebuild and no Cargo/Zig process ran

中文验证说明

• lint、format、typecheck 均通过
• release check 110 项通过，受影响 Desktop suite 40 项通过
• 实际构建并检查了 peer-less WSL archive 与 Linux x64 → arm64 跨目标 archive
• 在 Windows Electron 中重新安装并连接 Maka-Test WSL，成功选择项目并完成真实 session；WSL archive 不含 direct-peer prebuild，且未启动 Cargo/Zig

AI use

Select exactly one:

• No generative tool made a substantive contribution
• Generative tooling made a substantive contribution

Tool(s) and scope: Codex implemented the target-aware resolver, SSH target preflight, packaging changes, focused tests, and cross-platform verification.

Checklist

• Tests cover the change and fail without it
• Lint, format, typecheck and the affected suites pass locally

Does this PR entail a change in behavior?

• Yes — described under Summary above
• No

[jackwener]

I reviewed exact head 32316a4ed6b5627846d469b22f8d4adbbf443daf and found no blocking issue.

Development package selection now follows the target environment instead of the Desktop process, with build/cache ownership separated by target. WSL deliberately selects the peer-less archive; development SSH performs a bounded target probe before resolving its archive; supported cross-target peer builds are explicit and fail early when prerequisites or targets are unsupported. Published release packaging remains on its existing all-target path. The current-main synthetic merge is clean, and the exact-head test and quality checks are green; the separate package workflow was still running when I submitted this review.

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