Assets was one list holding two different kinds of thing. A fungible balance
answers "how much do I have"; a non-fungible one answers "which ones do I
hold", and they want different rows — an amount against a symbol, versus a
commitment and a capability. On a real chipnet wallet that meant 46 rows
where 32 of them were only ever going to say "1 NFT".
Split by what each category actually holds, so a category carrying both
appears in both — which is honest, because it really does hold both. Assets
counts categories; Certificates counts individual certificates, since "3"
should mean three things you hold rather than three groups.
Certificate rows carry the commitment, because it is the only thing that
distinguishes two certificates of the same category, and a MINTING or MUTABLE
tag, because "can still issue others" versus "is fixed" is worth seeing
without opening anything. A `none` capability is left unlabelled rather than
adding noise to every row.
"Certificates", not "NFTs": these are membership, licence and record tokens,
and NFT carries collectible-market baggage that misdescribes them. Ids and
data keys stay `nft` — that is the CashTokens protocol field, so it is
protocol name inside and product name on screen.
Two things caught while building it. `draw({})` was overwriting the "no
assets" empty state with an empty string, which is now the common case since
purely-non-fungible categories no longer appear there. And certificate rows
printed the category twice, as the title and again on the right — the right
column now only carries it when the row has a real name to lead with.
Metadata is looked up for every category, not just the fungible ones, so
naming a token also names its certificates.
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