Add Hysteria 2 protocol with admin domain SSL via Let's Encrypt.

Co-authored-by: Cursor <cursoragent@cursor.com>

translations/zh.json

@@ -361,6 +361,12 @@
   "clear_server": "清除服务器",
   "remove_server": "从面板移除服务器",
   "telemt_desc": "基于 MTProxy 的 Telegram 代理，支持高级混淆。",
+  "hysteria_desc": "Hysteria 2（QUIC/UDP，teddysun/hysteria），支持 Let's Encrypt TLS。安装时由管理员指定域名。",
+  "hysteria_domain": "域名",
+  "hysteria_email": "Let's Encrypt 邮箱",
+  "hysteria_port_hint": "Hysteria UDP 端口（默认 8998）。签发证书时需要 80/TCP 空闲。",
+  "hysteria_install_hint": "安装前请将域名 A 记录指向本服务器。80/TCP 会临时用于 Let's Encrypt HTTP-01 验证。",
+  "hysteria_dns_hint": "安装前请创建此 DNS 记录：",
   "dns_desc": "防止广告和保护隐私的个人 DNS 服务器。",
   "dns_internal_hint": "The service runs on the internal network (172.29.172.254) without binding to host ports.",
   "telemt_port_hint": "Port for the Telegram proxy (typically 443).",