feat: link mac client to shared gateway proxy

src/server/clientSettings.js

@@ -4,6 +4,9 @@ import { settings } from "./config.js";
 
 const DEFAULT_CLIENT_SETTINGS = {
   homeBypassEnabled: false,
+  sharedProxyEnabled: false,
+  sharedProxyControlUrl: "",
+  sharedProxy: null,
 };
 
 function normalizeProxyPort(value, fallback = settings.proxyPort) {
@@ -38,10 +41,45 @@ function writeJson(filePath, value) {
   fs.writeFileSync(filePath, JSON.stringify(value, null, 2), "utf8");
 }
 
+function normalizeUrl(value) {
+  const raw = String(value || "").trim();
+  if (!raw) return "";
+  try {
+    const url = new URL(raw);
+    if (!["http:", "https:"].includes(url.protocol)) return "";
+    url.hash = "";
+    url.search = "";
+    return url.toString().replace(/\/$/, "");
+  } catch {
+    return "";
+  }
+}
+
+function normalizeSharedProxy(value) {
+  if (!value || typeof value !== "object") return null;
+  const host = String(value.host || "").trim();
+  const port = Number.parseInt(value.port, 10);
+  const protocol = value.protocol === "http" ? "http" : "socks5";
+  if (!host || !Number.isInteger(port) || port <= 0 || port > 65535) {
+    return null;
+  }
+  return {
+    host,
+    port,
+    protocol,
+    checkedAt: value.checkedAt || null,
+  };
+}
+
 export function normalizeClientSettings(input = {}) {
+  const sharedProxy = normalizeSharedProxy(input.sharedProxy);
+  const sharedProxyEnabled = Boolean(input.sharedProxyEnabled && sharedProxy);
   return {
     homeBypassEnabled: Boolean(input.homeBypassEnabled),
     proxyPort: normalizeProxyPort(input.proxyPort),
+    sharedProxyEnabled,
+    sharedProxyControlUrl: normalizeUrl(input.sharedProxyControlUrl),
+    sharedProxy,
   };
 }