Dark mode fixes.

The "Attest" wordmark in the header was drawn in near-black on the dark background — 1.04:1 against it, which is to say invisible. It follows the theme now.

Labels on disabled buttons sat at 2.4:1 on their own grey. Disabled buttons have their own text colour now, in both themes.

The copy icon rendered as a solid block instead of an outline.

Fixed: with PIN protection enabled, the copy button next to your private key did nothing when clicked — no message, no explanation why. It works now.

New: a PIN-protected private key can be copied out. Copying opens the PIN window, which puts the key on your clipboard and tells you which account it belongs to. Until now, turning PIN protection on meant your key could never leave Attest.

Also fixed: Save key could be clicked with an empty field and reported success without having saved anything.

New logo and bug fixes