[Rigidity]

The create offer page had become cluttered. This redesign takes its layout from ent-wallet's create offer screen:

• You offer / You request: two side-by-side cards with a ⇄ divider between them (they stack with ⇅ on narrow screens). Asset rows come first and the small "+ Token / + NFT / + Option" buttons sit below. An empty side shows a dashed placeholder.
• Offer Settings: each option is in its own card.
  • Network Fee: the fee input, with a note that it's required for request-only offers.
  • Expiration: a switch in the card header. When it's on, the existing duration / date & time input shows below it.
  • NFT Offers: "One offer" or "One offer per NFT". This card only appears when offering more than one NFT. It moved out of the asset list, where it was a switch.
  • Split coins first: a switch in the card header. When it's on, the split fee input shows below it. It's disabled, with an explanation, while each NFT gets its own offer.

The setting card (OfferSettingCard in src/components/OfferSettings.tsx) takes an optional switch for its header. The NFT Offers choice (OfferChoice) uses native radio inputs in a fieldset, so it doesn't add a dependency. What the page passes to offer creation is unchanged, and src/pages/MakeOffer.test.tsx checks the settings that reach the confirmation dialog.

Review

Two review loops, each run with separate correctness, tests and simplification reviewers. The second loop ran after the switch change and the rebase onto main. Neither found anything at major or above. Fixes from the second loop:

• OfferChoice no longer has per-option details or a disabled state, which nothing has used since expiration and coin splitting became switches.
• New tests check that both typed fees reach the confirmation dialog, and that an NFT row that hasn't been filled in doesn't count as an offered NFT.

Decisions to confirm

• Network fee always visible. ent-wallet hides its offer fee behind a checkbox. I kept the fee visible because Sage requires one for request-only offers and applies the default fee setting. Switching to a checkbox would only change MakeOffer.tsx.
• New wording for the labels and descriptions above.

New strings are wrapped with Lingui; the next release needs pnpm extract.