Receive-chain gap 200 and change-chain gap 100 everywhere a chain is
walked: daemon /balance (new gapInternal, cap 200), Blockbook xpub
queries, history ownership set, and the signing-key derivation in Send so
anything the scan finds is spendable.
Trailing-zero trimming now applies to the hero balance and assets row
only; history, details and the send review keep eight decimals. The hero
number no longer wraps — long balances step down in size.
Price feed defaults on; existing configs flipped once via the v3 marker.