feat: Egern 增加默认 sni

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.15.2",
+  "version": "2.15.3",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and ShadowRocket.",
   "main": "src/main.js",
   "scripts": {

backend/src/core/proxy-utils/producers/egern.js

@@ -72,6 +72,9 @@ export default function Egern_Producer() {
                 return true;
             })
             .map((proxy) => {
+                if (proxy.tls && !proxy.sni) {
+                    proxy.sni = proxy.server;
+                }
                 if (proxy.type === 'http') {
                     proxy = {
                         type: 'http',