[Issue #294] Perf: Optimistic UI Updates for Contributions

[Ogstevyn]

After submitting a contribution, the UI waits for the full Soroban round-trip (5-10 seconds) before updating.\n\nOn contribution submit, optimistically update the paid balance immediately. Show Confirming on-chain... indicator. On confirmation, replace optimistic value. On failure, roll back and show error.\n\nAcceptance Criteria: After clicking Contribute, the paid amount updates instantly in the UI before chain confirmation.\n\nFiles: components/escrow/ContributeForm.tsx (Modify), app/escrow/[contractId]/page.tsx (Modify)

[habnark]

@habnark has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

hello can i be assign to this issue please

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[Agbeleshe]

@Agbeleshe has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hello, can I handle this? I have experience optimizing React and Next.js applications for performance, including bundle size reduction, code splitting, lazy loading, and Lighthouse score improvements. After reviewing the issue, I understand that the goal is to prevent Three.js from being included in the initial landing page bundle by converting DottedSurface to use dynamic imports with React.lazy and Suspense, allowing the component to load only after the page becomes interactive. I can update components/ui/dotted-surface.tsx and app/page.tsx to implement an efficient lazy-loading strategy, provide an appropriate loading fallback, and verify that the Three.js bundle is deferred from the critical rendering path. I will also validate the impact through bundle analysis and Lighthouse testing to ensure the optimization delivers the expected performance improvement while preserving the existing user experience. I focus on writing clean, maintainable frontend code with measurable performance gains and am available to start immediately. I would appreciate the opportunity to contribute and look forward to hearing from you.

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