Was: 5-denom x8 chain (spur=1, bevel=8, cog=64, crown=512, sun=4096).
Now: 6-denom x8 chain with sprocket inserted between bevel and cog.
Verified in-game (user reported Sun = 64 Cogs, which only fits these
values: spur=1, bevel=8, sprocket=64, cog=512, crown=4096, sun=32768).
Plot purchase math (countCoins, takeCoins, giveCoins) was using the
old 5-denom map: cog would have been counted as 64 spurs when it's
actually 512, and sprockets weren't counted at all. Plot prices remain
at 100/250/600 spurs which are still appropriate small-change amounts;
user can edit PLOT_DEFS to raise once playtesting confirms desired
economy scale.