erga 0.30.0 — one bar, one key each

Download erga-0.30.0-arm64.dmg, drag to Applications, then:

xattr -dr com.apple.quarantine /Applications/erga.app

Changed

• Every control moved to one bar at the foot of the window, console-style:
  solo, max·eco·min, the pool, copy address, change address, back up, report a
  bug — each with a keycap showing the key that also does it. The header keeps
  the name, the version, the licence, the status and the batteries.

Added

• Hotkeys. space presses the crystal; s solo; m cycles max→eco→min;
  p switches the pool; c copies the address; a opens the address screen;
  b backs up the seed; r reports a bug; esc leaves the full-window
  screens. Keys are matched by physical position, so a Cyrillic layout mines
  exactly like a Latin one; letters never fire while a text field has focus.
• The pool control is one pill that cycles — with two verified pools, cycling
  is choosing.

Zero clippy findings; 21 tests.