fix(routing): serialize route updates and correct VPN-gated route application

ts/config/classes.target-profile-manager.ts

@@ -33,6 +33,13 @@ export class TargetProfileManager {
     routeRefs?: string[];
     createdBy: string;
   }): Promise<string> {
+    // Enforce unique profile names
+    for (const existing of this.profiles.values()) {
+      if (existing.name === data.name) {
+        throw new Error(`Target profile with name '${data.name}' already exists (id: ${existing.id})`);
+      }
+    }
+
     const id = plugins.uuid.v4();
     const now = Date.now();