feat(tokens): revamped v2 currency-info layout

[bmc08gt]

Summary

Ports the iOS currency-info revamp (code-ios-app#585) to Android's new UI. Gated on FeatureFlag.NewUi; the legacy token-info screen is untouched for the old UI. PR 1 of the two-part port (this is the layout; the Apple-Wallet card-expand animation is the follow-up).

New CurrencyInfoContentV2 (LazyColumn), top → bottom — all reusing existing components:

• Hero bill card (TokenCard) — balance + appreciation when held, identity only when not
• Action tiles — Give / Convert / Withdraw; a single Get when not held; USDF = Convert + Withdraw (no Give — ships separately, per iOS)
• Recent — per-token activity preview (ActivityFeedRow), held only
• Market Cap + chart (MarketCapSection), non-USDF
• About — description (ExpandableText) + social chips
• Created-at footer, non-USDF
• Scroll-revealed leading title pill (icon + name + market cap), fades in on scroll

The screen hosts its app bar as the CodeScaffold topBar and does not apply the top inset, so content scrolls under the bar with a short soft top fade. Actions reuse existing pushes (Give sheet, Swap-buy, Withdrawal) — no buy-flow plumbing needed (buy is already pushable on Android, unlike iOS).

Data: adds a bounded per-token recent-activity query — MessageDao.observeRecentForMint, MessageDataSource.observeRecent(mint, limit), ActivityFeedCoordinator.recentTransactions(mint, limit) — surfaced as TokenInfoViewModel.State.transactions (read off IO so the page arrives in one pass).

All sizing/type via grid/staticGrid/typography/shape/color tokens, so it rescales when the grid moves to 4pt.

Verified on device (emulator)

• Held (Jeffy): hero + appreciation, Give/Convert/Withdraw, Recent, Market Cap + chart, About + social chip, created footer; title pill reveals on scroll; content scrolls under the bar.
• USDF (Dollars): Convert + Withdraw only, no chart, no created footer, About after Recent, no share button.
• Not held (Denarii): single Get tile, identity card, no Recent.

Deliberate deviations from the Figma (following the iOS PR decisions)

• USDF omits the Give tile.
• Top-right keeps the share button (hidden for USDF), not the "…" overflow the mockups show.