feat(admin): redesign the lending market detail and risk pages

What

Redesign of the two admin lending screens.

Market detail (/lending/markets/:id)

• Hero with market glyph, status, rail and "accrued N min ago"; four related KPI cards (supplied / borrowed / liquidity with utilisation meter / protocol equity with withdrawable).
• Tabs kept in ?tab=: Overview, Rate history, Configuration, Operations (Operations only with lending:operate). Configuration and Operations stay mounted so an in-flight mutation still reports after a tab switch.
• Overview: interactive rate curve (y scale, hover/keyboard probe), Balance panel (assets vs funding bars, payables with zero rows muted), collateral table with a shared-domain risk ladder.
• Rate history: time-scaled step chart with tooltip and series toggles; newest-first table with Show all.
• Configuration: rate model / risk params as percent figures with raw fractions, risk ladder, scheduled-version callout; compact custody grid.
• Operations: equity cards + danger zone (logic unchanged: idempotency keys, reasons, notice warnings).
• Removed dead "—" cells (Collateralization, Oracle Price, Reserves) and duplicated figures.

Risk & operations (/lending/risk)

• KPI strip (open alerts by severity, in liquidation, transfers waiting, liquidation engine) over five tabs: Attention, Liquidations, Transfers, Audit, Settings.
• Alert cards with human titles/explanations (en + vi) for 27 ops alert types, market/user chips, relative time, repeat count, details disclosure and a custody-mismatch comparison.
• Audit grouped by day with readable action labels; settings as cards; designed empty states and skeletons.

Shared: page tab strip + useTabParam hook, EmptyState, skeletons, copy button.

Status

• Final whole-branch review passed in 2 rounds (0 blocking, 0 should-fix).
• admin/: pnpm test 827/827, pnpm type-check clean, pnpm lint:check 0 errors, pnpm build green.
• No backend or API change.

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