The Invisible Character That Cost Me Too Much Debugging Time
The Problem Imagine this: someone tells you they can’t log in. At first, it feels like the kind of bug you can squash before finishing your coffee. Maybe they fat-fingered their password. Maybe their browser cache is holding onto stale session cookies. Easy. Except it isn’t. You check the admin panel. The email is there: james.bond@mi6.com . Looks fine. The password hash matches what the user typed in. Logs show the request hitting the system cleanly. No obvious anomalies. And yet, every att