Lazy load content

[Pvsaint]

Summary

The Storybook design system integration is now fully set up and ready to go!
I have completed the task to mark the Wallet Demo Page as non-production.

closes #695
closes #693
closes #686
closes #628

Changes

Test Plan

Automated tests added or updated

• Unit tests (backend/src/**/*.spec.ts) — service/guard/decorator logic in isolation
• Integration / e2e tests (backend/test/**/*.e2e-spec.ts) — HTTP round-trips with mocked infrastructure
• Frontend component tests (frontend/src/**/*.test.{ts,tsx}) — React component behaviour
• Frontend e2e tests (frontend/e2e/**/*.spec.ts) — Playwright browser flows
• Contract tests (contract/) — Soroban/Rust unit tests via cargo test
• No new tests required — explain why: ___

How to run the tests locally

# Backend unit tests
cd backend && npm test

# Backend e2e tests (requires no live DB — uses in-memory mocks)
cd backend && npm run test:e2e

# Frontend component tests
cd frontend && npx vitest run

# Frontend e2e tests (requires dev server on :3000 and API on :3001)
cd frontend && npx playwright test

# Contract tests
cd contract && cargo test

Manual verification checklist

• Happy path works end-to-end in a local environment
• Error / edge cases handled gracefully (stale state, invalid input, disconnected wallet)
• No regressions in closely related API or UI flows
• Rate-limiting, auth guards, and feature flags behave as expected where touched
• Linting passes: cd backend && npm run lint / cd frontend && npm run lint

Related issues

Notes for reviewers

[drips-wave]

@Pvsaint Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

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