- Frontend: Only include streamSettings in toJson() for vmess, vless, trojan, shadowsocks, and hysteria protocols
- Frontend: Hide Stream tab in Advanced section for unsupported protocols
- Frontend: Clear streamSettings in Advanced tab when switching to unsupported protocols
- Frontend: Add CodeMirror JSON editor to config view in index page with mobile responsive design
- Backend: Add normalizeStreamSettings() to clear streamSettings for tunnel, mixed, http, tun, and wireguard protocols
- Backend: Apply normalization in AddInbound() and UpdateInbound()
- Backend: Add omitempty JSON tag to StreamSettings field to exclude null values from Xray config