feat: telemetry consent, webhook delivery log panel, responsive table…

[arandomogg]

Summary

• Completes telemetry consent settings UI (anonymous usage & error reporting toggle with localStorage persistence, [UI/UX & Dashboard Enhancements] Anonymous Usage & Telemetry Collection Consent #757)
• Adds webhook delivery log history panel with expandable per-row drawer showing status codes, request payloads, and response headers ([UI/UX & Dashboard Enhancements] Webhook Delivery Log History Panel #745)
• Fixes mobile-optimised responsive tables: adds missing <tr> wrapper in TransactionsTable so rows render correctly on all screen widths ([UI/UX & Dashboard Enhancements] Mobile-optimized Responsive Tables #756)
• Adds offline transaction preparation to the client library — prepareOfflineTransaction builds and persists signed XDRs to storage while offline; FluidQueue can flush them on reconnection ([Architecture & Database] Support Offline Transaction Preparation #716)

Changes by issue

#757 — Anonymous Usage & Telemetry Collection Consent

• TelemetryConsentSettings component, telemetry-consent.ts utility, and telemetry-consent.test.ts were already authored on this branch; this commit wires up the missing <div> wrapper in dashboard/page.tsx so the consent section renders inside a correctly structured layout.

#745 — Webhook Delivery Log History Panel

• Rewrote WebhookDeliveryLog.tsx: fixed CopyButton text= → value= prop bug; removed non-existent variant prop from StatusBadge; replaced the global payload footer with a per-row expandable drawer that shows request payload, response headers, and event payload side-by-side in a three-column grid.
• Extended StatusBadge to accept WebhookDeliveryStatus (adds the "retrying" tone mapped to amber with pulse animation).
• Added requestPayload and responseHeaders fields to all sample records in webhook-delivery-logs-data.ts to satisfy the type definition.
• Created lib/webhook-delivery-logs-data.test.ts (7 unit tests covering pagination, field presence, status coverage, and edge cases); all 11 admin-dashboard unit tests pass.

#756 — Mobile-optimised Responsive Tables

• Fixed missing <tr className="align-top"> opening tag inside TransactionsTable's FragmentRow map — without it the browser was forced to infer table structure, breaking cell alignment and the mobile disclosure expansion on narrow viewports.
• Tables already collapse wide columns behind responsive breakpoints (md:hidden, lg:table-cell, xl:table-cell) and expand into card-style <dl> rows on screens below 768 px via the MobileDisclosure pattern.

#716 — Support Offline Transaction Preparation

• Added client/src/offline-tx.ts: pure, storage-adapter–based module with prepareOfflineTransaction, getPendingOfflineTransactions, removePreparedTransaction, clearPreparedTransactions, getPendingCount, and validatePreparedTransaction. No network access is required; XDRs are serialised to the provided storage key and can be submitted later via FluidQueue.add.
• Exported all public symbols and types from client/src/index.ts.
• Created client/src/testUtils/__tests__/offline-tx.test.ts (12 unit tests); all pass.

Test plan

• Run npm run test:unit in admin-dashboard/ — 11 tests pass
• Run npx vitest run src/testUtils/__tests__/offline-tx.test.ts in client/ — 12 tests pass
• Navigate to /admin/dashboard — confirm telemetry toggle renders and layout links are correctly spaced
• Navigate to /admin/webhooks/logs — click "Details" on any row; confirm request payload, response headers, and event payload appear in the drawer
• Resize browser below 768 px on dashboard — confirm transaction rows collapse and "View details" expands the mobile disclosure correctly

closes #757
closes #745
closes #756
closes #716

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