Exclude macOS process lookup from iOS

[yiguodev]

Summary

• restrict the Darwin libproc process lookup implementation to macOS
• add an iOS fallback that reports process lookup as unsupported
• keep macOS process-based routing behavior unchanged

Why

Go's darwin build constraint also matches GOOS=ios. As a result, the macOS implementation imported proc_pidinfo, proc_pidfdinfo, and proc_pidpath into iOS binaries even though these APIs are not exposed through the public iOS SDK. This can trigger App Store Guideline 2.5.1 validation or review failures.

Validation

• go test ./common/net -count=1
• CGO_ENABLED=0 go test ./common/net -count=1
• go test ./app/router ./proxy/tun -count=1
• verified GOOS=ios selects find_process_ios.go
• verified the iOS archive contains no proc_pid* symbols while the macOS archive still does

[RPRX]

路由 process for Linux 对于 TUN 入站也兼容一下吧，你测测

[Copilot]

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