Offline mode and request queue for flaky networks

[Nanle-code]

Labels: pwa, resilience

Description

src/utils/offline.js exists but is not a first-class UX. Power users on poor connections need queued actions and cached read-only data.

Tasks

Service worker or navigator.onLine integration for read-only cached accounts.
Queue failed Horizon writes with retry via src/lib/errorHandling/RetryManager.ts.
Banner component in src/App.tsx when offline.
Acceptance criteria

Offline shows last cached account overview from src/lib/cacheManager.ts.

Queued simulate/build operations replay when online.
Files

src/utils/offline.js
src/lib/cacheManager.ts, src/lib/cache.js
src/lib/errorHandling/RetryManager.ts
src/App.tsx

[Manuelshub]

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

Hello maintainer @Nanle-code, I'd love to work on this issue, can I take a stab at it??

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Manuelshub to this issue.

[drips-wave]

Congratulations, @Manuelshub! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @Manuelshub: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

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