feat: v1.9.0 — media download improvements, mobile image fix, website copy fix

feat: 添加飞书交流群入口 + 官网全站 emoji 替换为 SVG 图标 + 源码关于页面/引导弹窗飞书入口

fix: SSE proxy buffering (#19 #7) + clarify host placeholder (#17)

chore: bump version to v1.8.0

feat: add friendly error for Gateway rate limit (too many auth attempts)

fix: show friendly error immediately when Gateway is unavailable (stop 20s timeout overwrite)

feat: friendly error messages for Gateway connection failures (ECONNREFUSED, timeout, auth)

fix: persist firstRun state via SETUP_PENDING marker in .env (survives server restart)

feat: first-run password setup flow + change password in settings + security hardening

feat: auto-detect token on login page via /api/setup-hint (localhost only)

feat: auto-create .env with random token on first start + show token in logs + improve tips text

fix: install.sh read from /dev/tty for curl pipe compat (closes #14) + feat: add reload button in chat header (closes #16)

feat(h5): add tips section on login page to help users find connection info

refactor(send-prompt): replace eval with export and python3 with node

Merge pull request #12 from youyli03/script/send-prompt-by-script