Add Data Export & Backup tab (wire existing #114 implementation)

[Nanle-code]

Labels: feature, dx, good first issue

Description

DataExport.jsx and useDataExport.js implement JSON/CSV export and backup import, but they are not registered in App.tsx TABS or the sidebar. Contributors cannot discover this feature.

Tasks

Add dataExport tab in src/App.tsx and nav entry in src/components/layout/Sidebar.jsx.
Surface export actions from Settings.jsx (link or embedded panel).
Ensure import uses src/lib/import.js (parseBackup, version checks).
Document flow in docs/api/dataExport.md.
Acceptance criteria

User exports account txs/ops/preferences from UI.

Import restores supported backup version with clear errors.

Hook tests or component test for happy path.
Files

src/components/dashboard/DataExport.jsx
src/hooks/useDataExport.js
src/lib/import.js, src/utils/export.js
src/App.tsx, src/components/layout/Sidebar.jsx
docs/api/dataExport.md

[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 take 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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