UX foundation W2 — editorial layout (home / send / activity)

[hellno]

Wave 2 of the UX foundation overhaul (DESIGN.md v2).

Apply the editorial language (type + whitespace + hairlines, no card-default; oversized mono hero; cockpit rows):

• Wallet home: big mono balance hero, no cards, holdings ledger, compact agent presence row (links to the agent surface), cleaned action row.
• Send confirm: transaction-as-hero (amount + recipient dominate), caution_line danger/caution, the ⌘↵ key-cap confirm + arm-delay (replace hold-to-confirm).
• Activity: editorial audit-log rows + STOP (lean scope), single-line clamped rows, status glyphs, day bands.

DoD: fmt / just check / test / no new deps / native screenshots. Golden ref: deckard-editorial-v3.html + deckard-agent-v4.html.