fix: avoid Object.hasOwn and structuredClone

src/sync/apply.ts

@@ -283,7 +283,7 @@ function isDeepEqual(left: unknown, right: unknown): boolean {
     const rightKeys = Object.keys(right as Record<string, unknown>);
     if (leftKeys.length !== rightKeys.length) return false;
     for (const key of leftKeys) {
-      if (!Object.hasOwn(right, key)) return false;
+      if (!hasOwn(right as Record<string, unknown>, key)) return false;
       if (
         !isDeepEqual(
           (left as Record<string, unknown>)[key],
@@ -298,3 +298,7 @@ function isDeepEqual(left: unknown, right: unknown): boolean {
 
   return false;
 }
+
+function hasOwn(target: Record<string, unknown>, key: string): boolean {
+  return Object.hasOwn(target, key);
+}

src/sync/mcp-secrets.ts

@@ -112,9 +112,6 @@ function isPlainObject(value: unknown): value is Record<string, unknown> {
 }
 
 function cloneConfig(config: Record<string, unknown>): Record<string, unknown> {
-  if (typeof structuredClone === 'function') {
-    return structuredClone(config);
-  }
   return JSON.parse(JSON.stringify(config)) as Record<string, unknown>;
 }
 
@@ -136,7 +133,7 @@ export function stripOverrideKeys(
   const result: Record<string, unknown> = { ...base };
 
   for (const [key, removeValue] of Object.entries(toRemove)) {
-    if (!Object.hasOwn(result, key)) continue;
+    if (!hasOwn(result, key)) continue;
     const currentValue = result[key];
     if (isPlainObject(removeValue) && isPlainObject(currentValue)) {
       const stripped = stripOverrideKeys(
@@ -160,3 +157,7 @@ export function stripOverrideKeys(
 export function hasOverrides(value: Record<string, unknown>): boolean {
   return Object.keys(value).length > 0;
 }
+
+function hasOwn(target: Record<string, unknown>, key: string): boolean {
+  return Object.hasOwn(target, key);
+}