PWA: service worker, offline shell, and install prompt

[Nanle-code]

Labels: pwa, performance

Description

public/manifest.json defines a installable PWA (standalone, icons), but there is no service worker. src/utils/offline.js is not integrated with install/update UX.

Tasks

Add Vite PWA plugin or lightweight custom SW caching index.html + static assets (not Horizon responses by default).
Register SW from src/main.jsx; show update banner when new version available.
beforeinstallprompt handler for “Install app” in Settings.jsx.
Fill manifest.json screenshots for store listing.
Acceptance criteria

Lighthouse PWA checks pass (installable, SW registered).

App shell loads offline; clear banner when network required for account data.
Files

public/manifest.json, index.html
src/main.jsx, src/utils/offline.js
vite.config.js
src/components/dashboard/Settings.jsx

[iBotayo]

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

I would like to work on this issue

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

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