fix(alibaba): update China mainland RPC endpoint and fix macOS build compatibility

[hezhongtang]

Summary / 摘要

EN:

• Update Alibaba China mainland RPC endpoint from bailian-beijing-cs.aliyuncs.com to bailian-cs.console.aliyun.com
• Update consoleSite identifier from BAILIAN_CONSOLE to BAILIAN_ALIYUN
• Add new cookie domain for the updated endpoint while retaining the old one for backward compatibility
• Move Linux test target behind #if os(Linux) conditional compilation in Package.swift
• Revert @Entry macro to explicit EnvironmentKey pattern for macOS build compatibility

中文：

• 更新阿里云中国大陆区 RPC 端点：bailian-beijing-cs.aliyuncs.com → bailian-cs.console.aliyun.com
• 更新 consoleSite 标识符：BAILIAN_CONSOLE → BAILIAN_ALIYUN
• 新增端点对应的 cookie 域名，同时保留旧域名以确保向后兼容
• 在 Package.swift 中将 Linux 测试 target 移至 #if os(Linux) 条件编译内
• 将 @Entry 宏还原为显式 EnvironmentKey 模式，修复 macOS 构建兼容性问题

Changes / 变更明细

Alibaba Endpoint Migration / 阿里云端点迁移

File / 文件	Change / 变更
AlibabaCodingPlanAPIRegion.swift	Update rpcBaseURL and consoleSite for .chinaMainland
AlibabaCodingPlanCookieImporter.swift	Add bailian-cs.console.aliyun.com to cookie domains
AlibabaCodingPlanProviderTests.swift	Add new domain to test stub allowlist

Build & Compatibility Fixes / 构建与兼容性修复

File / 文件	Change / 变更
Package.swift	Gate CodexBarLinuxTests behind #if os(Linux)
MenuHighlightStyle.swift	Revert @Entry to EnvironmentKey pattern

Code Review / 代码审查

Severity	Count	Status
CRITICAL	0	✅ Pass
HIGH	0	✅ Pass
MEDIUM	1	ℹ️ Info — SwiftTesting experimental flag inconsistency (follow-up)
LOW	1	📝 Note — old domain retained for backward compatibility

Verdict / 结论: APPROVE / 通过 ✅

Test Plan / 测试计划

• Build succeeds locally (swift build + compile_and_run.sh)
• CodexBar.app launches and runs correctly after rebuild
• Cookie import covers both old and new domains
• Test stubs updated to match new domain list
• Manual verification: Alibaba China mainland usage data loads correctly via new endpoint
• Manual verification: Cookie authentication works with the new bailian-cs.console.aliyun.com domain

[steipete]

Landed via temp rebase onto main.

• Gate: swiftformat Sources Tests; swiftlint --strict; pnpm check; swift build; swift test -q; ./Scripts/compile_and_run.sh
• Land commit: 9c66ed3
• Merge commit: aae3003

Thanks @hezhongtang!