fix: git pull first then compare versions (avoid CDN cache)

release: v1.2.1 - show version on startup

feat: show version number on every startup

fix: show pass status before confirmation prompt

release: v1.2.0

docs: sync README with script behavior and add Compatibility section

refactor: remove stale implementation notes from section headers

fix: improve pass/fail messages and fix garbled Chinese characters

fix: use refs/heads/master path for GitHub raw URL

feat: add version management, auto-update check, and --guard-update command

fix: replace all ipinfo.io references with ip-api.com in script, setup wizard, and README

fix: switch L3 fallback from ipinfo.io to ip-api.com, fix DEFER failure summary

fix: show usage hints on verification failure

docs: add Claude domain proxy rules with quick-copy snippets

docs: bilingual README, redact real IPs