Improve Explorer tx page Inputs/Transactions section

[begonaalvarezd]

the Inputs and Transactions cards on the tx page don't provide much value today - inputs show a raw ref/value with no indication of how they're used, and every PTB command except MoveCall just dumps a flattened arg string instead of anything readable.

for inspiration, check @Thoralf-M's vibecoded explorer, lots of good ideas there we want to bring over (adapted to our design system, not a straight port): https://github.com/Thoralf-M/iotatools/blob/develop/apps/explorer/src/pages/TransactionDetail.tsx

• proper rendering for every PTB command type, not just MoveCall - TransferObjects, SplitCoins, MergeCoins, Publish, Upgrade, MakeMoveVec currently fall back to a flattened arg string (Transaction.tsx + utils.ts in programmable-transaction-view/). object/address args should link out like MoveCall's do.
• show input -> command usage and result chaining: which command(s) consume each input, and which commands consume another command's Result/NestedResult. right now it's just raw Input(n)/Result(n) indices with no context.
• add object version + digest to InputsCard (currently just shows the object id)

follow-up issue will add a "pro mode" toggle on top of this for even more technical detail.