Get Paid: unified transaction card

[BullishNode]

Stacked on the Nostr keys PR. One card per Get Paid entry, showing everything the server knows — there is no separate "payment" object, only the invoice, so the card no longer links out to a second screen.

• Every field of the history contract renders: receipt id (copyable, never presented as a chain txid), settlement kind stated explicitly, per-leg network, and the fiat-conversion override with all five 0.3 reasons (ambiguous_create now mapped and worded instead of falling through to "unknown").
• The invoice's own facts merge in via the invoices facade: status with supporting lines only when they add information, face amount, pricing, paid/remaining/overpaid, tolerance, rate locked until, absolute expiry, paid via/at, accepted rails, and a per-event payment history.
• Payer instructions render last and collapsed: lightning invoice, addresses, BIP21, per-rail payer amounts, quote rails, and the live payer quote rate — labelled distinctly from the R1 reference and R2 executed rates so the three can never be misread.
• Organized into titled sections in merchant-priority order; every fact appears exactly once; long values truncate in place and copy in full; empty sections render nothing.

Reference doc for every field and value: GETPAID_TRANSACTION_CARD_REFERENCE.md (kept out of the repo).