I have shipped features that looked beautiful and worked perfectly with a mouse, only to discover later that they were nearly impossible to use with a keyboard. It felt like building a grand stone keep with polished banners and glowing torches, then realizing I forgot to add doors. Users could admire it from afar, but they could not enter. Fixing keyboard navigation after the fact is humbling. It forces me to examine every assumption I made about interaction. It also reminds me that accessibility is not an optional side quest. It is part of the main campaign. When I return to an existing codebase to repair keyboard support, I approach…