feat: block launching profiles for incompatible systems

src/types.ts

@@ -27,6 +27,7 @@ export interface BrowserProfile {
   note?: string; // User note
   sync_enabled?: boolean; // Whether sync is enabled for this profile
   last_sync?: number; // Timestamp of last successful sync (epoch seconds)
+  host_os?: string; // OS where profile was created ("macos", "windows", "linux")
 }
 
 export type SyncStatus = "Disabled" | "Syncing" | "Synced" | "Error";