Persist wallet pairing URIs to AsyncStorage for resilience

[kilodesodiq-arch]

Problem Statement. WalletContext exposes pairingUri but the URI is not durable
across app restarts. Operators losing the app during a pairing sequence lose context.

Technical Context.
app/mobile/src/contexts/WalletContext.tsx.

Expected Outcome. On URI generation, immediately persist to AsyncStorage under
@chainforge:pairing. On boot, restore.

Acceptance Criteria.

• Test simulates URI generation, kill app, restart, asserts restored.

Files or modules likely to be affected.
app/mobile/src/contexts/WalletContext.tsx.

Difficulty. Easy
Estimated effort. S

---

---

Backlog item #90 from `docs/maintainer-issue-backlog.md.

[Ayinkx1]

Hi i would like to work on this issue please assign to me
I can do it perfectly

[TheBigWealth89]

I would love to resolve this issue. Please assign it to me thanks

[grantfox-oss]

🦊 GrantFox — @TheBigWealth89 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 #298)
2. Your PR will be reviewed by the ChainForgee maintainers

Good luck! Track your progress on GrantFox.