Fevga 1.7

• Fix: when every one of the computer's checkers was stuck right behind six of your points in a row (so your move had to open one of them), the board could highlight a destination that keeps the wall shut. Tapping it froze the turn. The board now offers only moves the rule allows.
• Rules audit: a new test (test/legality.mjs) re-implements the Fevga rules independently and checks, for every roll in thousands of positions, that the moves the game offers are exactly the legal ones: nothing legal missing, nothing illegal allowed.
• Includes 1.6's compact phone layout.
• Installs over 1.0 – 1.6 (same signing key) and keeps your games and settings.