UiPath hit a $35 billion market cap selling software robots that broke every time a button moved. That company is the key to understanding why every AI player has shipped an "agent browser" in the last 12 months, with Gumloop joining today. The old RPA bots automated websites by memorizing pixel coordinates and HTML selectors. If a developer renamed a field or shifted a menu, the bot died, and enterprises hired entire consulting teams whose only job was keeping thousands of these fragile…