Hi Maintainers,

This PR introduces a large-scale update to Simplified Chinese (zh-CN) localization, with approximately 600 modifications across the i18n files.

I sincerely appreciate all the hard work and effort you have already put into the HomeBridge project. As a small contributor, I hope to do my part in helping improve and refine the Chinese translations, making the project more accessible and user-friendly for zh-CN users.

Thank you very much for your time and review.

• Correct settings.startup.keep_accessories_desc to indicate accessories are kept in cache after plugin uninstall
• Update settings.title_startup_options to “启动与环境”
• Improve wording for settings.mdns_advertiser_help
• Translate remaining strings in plugins.manage, status.uptime, and settings.terminal
• Standardize accessories.control.not_mute to “取消静音”
• Align users.setup_2fa_* error messages with source text
• Verify consistency of status.widget.hide_npm (Show npm Version)
• Full review of zh-CN.json confirms no English remnants (proper nouns excepted)

♻️ Current situation

• Minor inconsistencies and misinterpretations in Simplified Chinese localization (e.g., keep_accessories_desc, “Startup & Environment”, 2FA errors, not_mute, npm version label).
• No runtime logic affected.

💡 Proposed solution

• Align zh-CN with en.json: fix keep_accessories_desc (“kept in cache”), unify “Startup & Environment”, refine mdns help, standardize terms, and perform a full pass to remove English remnants (proper nouns excepted).
• Scope limited to ui/src/i18n/zh-CN.json.

⚙️ Release Notes

• Improved Simplified Chinese localization across Settings, Status, Plugins, and Users.
• No breaking changes; no migration required.

➕ Additional Information

• settings.startup.session_desc: “Number of seconds before the user is logged out of the UI. Default is 8 hours.”
• Proper nouns (e.g., Homebridge, npm) remain in English by convention.

Testing

• Manual: run UI, switch to Simplified Chinese, verify keys in Settings (Startup & Environment), Status (uptime, Show npm Version), Plugins, Users (2FA errors).
• No test changes required.

Reviewer Nudging

• Start with diff of ui/src/i18n/zh-CN.json; compare key semantics with en.json.
• Launch UI and spot-check the above pages for correct wording.