feat(currency-info): revamped new-UI token info layout

[bmc08gt]

Revamps the token/currency info page for the new UI (BetaFlags.newUI), per the Figma frames 9121-14267, 9137-9119, 9137-9343 and the notes below them. The legacy layout is untouched for the old UI.

Stacked on #584 (pushable buy flow). Review that one first; this retargets to main once it merges.

Layout (top → bottom)

• Hero bill card — reuses TokenCardView. Balance + appreciation pill when held; identity only when not.
• Action tiles — Give / Convert / Withdraw, or a single Get when the token isn't held.
• Recent — per-token activity preview (held tokens only); header opens the full history.
• Market Cap — reuses CurrencyInfoMarketCapSection as-is (value + monthly delta live inside the interactive chart).
• About — extracted into a reusable CurrencyInfoAboutSection (keeps ExpandableText expand/collapse) + social links.
• Created-at footer.

Title bar

• Leading Liquid Glass pill (icon, name, market cap) that appears only once the hero card's own title scrolls under the bar, tracked via onScrollGeometryChange.
• The item is faded rather than inserted/removed — churning toolbar items mid-transition wedges nav-bar layout.
• The capsule is drawn by the label (glassEffect(.regular, in: .capsule)) instead of the toolbar's platter: the system platter hugs its content and swallows most of the trailing inset the spec calls for. Measured against the spec — height 36pt (spec ~37), width 112pt (~107), trailing gap 21pt.
• Label uses semantic .primary/.secondary so the glass applies the system's vibrancy and stays legible over a bright bill card scrolling beneath.
• Top scroll edge set to .soft, so content fades under the bar instead of meeting a hard line. The bar background is deliberately left in place — hiding it removes the surface that effect renders into.

Behaviour

• USDF / Dollars: Convert + Withdraw only (Give ships separately), no market-cap chart, no created date, not shareable; About sits under Recent. Title uses the mint's name, so it reads "Dollars".
• Actions: Give → .give(mint); Convert / Get → the pushed buy flow (.buyCurrency, feat(buy): allow the buy flow to be pushed onto a host stack #584); Withdraw → .withdrawCurrency(mint), pre-selected.
• Top-right keeps the existing share button (no overflow menu); hidden for USDF.
• Per-token Recent loads through the view model (loadRecentActivities), keeping DB access out of the view.
• Spacing on this screen and the wallet snaps to the 4pt grid (2/6/10 → 4/8/12).

Fixes found while iterating on device

• Horizontal scrolling — the market-cap section cancelled the stack's inset with padding(.horizontal, -20), making that row wider than the viewport and letting the page pan sideways. Insets are now applied per section; the chart still bleeds edge to edge.

Testing

Built and run on the iPhone 17 simulator and on device (iOS 27). Driven with Maestro:

• All three variants render correctly (held community token, USDF, not-held).
• Title pill hidden at rest, revealed on scroll; measured against the spec.
• Horizontal swipe now produces a pixel-identical frame (was panning); chart still spans the full width.

Follow-ups (deliberately not here)

• Apple-Wallet expand transition from the wallet card (needs an overlay/matchedGeometryEffect architecture rather than a nav push).
• Dollars "bill" hero art (rotate 90°, left = top-of-bill, USDF colours).
• Recent rows reuse WalletActivityRow (single avatar) vs the frames' dual-token swap rows.
• The token card's appreciation pill (6/2) is the one remaining off-grid value; left alone as it was ported to match the Figma card spec.

[bmc08gt]

Superseded by #585 — same branch, rebased onto main after #584 merged. GitHub auto-closed this PR when its base branch (feat-pushable-buy-flow) was deleted on merge, and a closed PR cannot be reopened or retargeted.