- MuiOutlinedInput hover override: was inheriting MUI's default
white outline in dark mode (too bright). Now uses an alpha-23%
white in dark and text.primary in light.
- TextInput: -webkit-autofill now repaints the input bg with
background.paper (instead of Chrome's harsh blue/yellow autofill
highlight), text in text.primary, with the standard 5000s-transition
trick to suppress the brief flash. Works in both modes.