No offline/PWA support — app is unusable without a live network connection

[ndii-dev]

No service worker, no manifest.json beyond whatever Next.js scaffolds by default, no offline fallback UI. A wallet app benefits from at least being able to show last-known balances/transaction history when offline, even if sending requires connectivity.

Definition of done:

• Service worker caching last-fetched balance/transaction state
• Explicit, tested offline UI state (not a blank error page)
• Send/off-ramp actions clearly disabled (not silently failing) when offline

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Before opening a PR for this issue, read CONTRIBUTING.md.

This is not a starter-issue. The Definition of done above is the full
acceptance criteria, not a subset to sample from — a PR that addresses part
of it is an unfinished issue, not a smaller one. Your PR must include, in
the PR description itself:

• Root cause / design-decision rationale in your own words — not a restatement of this issue
• Every Definition of done bullet above addressed explicitly, with a one-line note on how
• Evidence the code actually runs: pasted test/build output, a screen recording or before/after screenshots for UI changes, or real (non-mocked) logs for network/contract-facing work
• New or updated tests included and shown passing (paste the output)
• Any adjacent/related behavior this issue calls out re-verified, not assumed unaffected

PRs missing these will be sent back before review, not reviewed and rejected — please do this up front.

[iamb8t0-oss]

Hi i would like to work on this issue

[od-hunter]

Hi can i be assigned this issue please? I've gone through the description and I'm up for the task. Kindly assign me please.

[grantfox-oss]

🦊 GrantFox — @iamb8t0-oss has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #94)
2. Your PR will be reviewed by the Orbit-Wal maintainers

Good luck! Track your progress on GrantFox.