Add PWA install prompt and offline fallback page

[Chuks-coderr]

Overview

SoroStream should be installable as a Progressive Web App on mobile and desktop. An install prompt and offline fallback page make the app feel native and accessible without an internet connection.

Problem

There is no PWA manifest or service worker. Users on mobile must open the app in a browser every time and cannot install it to their home screen. Offline visits show a browser error page.

Proposed Solution

• Add a manifest.json with app name, icons, theme color, and display: standalone
• Implement a service worker that caches the app shell for offline use
• Add an install prompt banner that appears after the user has visited twice
• Create a custom offline fallback page showing cached stream data when available

Acceptance Criteria

• App passes Lighthouse PWA audit with no critical failures
• Install prompt appears on the second visit on mobile browsers
• Offline fallback page displays instead of browser error when network is unavailable
• Service worker caches app shell assets and serves them offline
• Manifest icons are present at required sizes (192px, 512px)

[firstJOASH]

@firstJOASH has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

i can solve this issue
kindly assign me

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

[Diggardson270]

@Diggardson270 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Sorostream app looks like a great project, I see you have issues, let me solve this one for you
ETA: 3hrs

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Diggardson270 to this issue.

[Faithy5]

@Faithy5 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello. I would love to work on this project as I have hands-on experience on it. After reviewing the scope of this issue, I’m confident in my ability to deliver a complete, well-tested solution.

I’d be grateful for the opportunity to contribute and help advance this project. Thank you.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Faithy5 to this issue.

[OluwapelumiElisha]

@OluwapelumiElisha has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello,

I would like to work on this issue.

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

[Tim4evar]

@Tim4evar has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi maintainer, I’ve reviewed this issue and I would love to work on this. I am confident that I will be able to resolve it neatly.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Tim4evar to this issue.

[drips-wave]

Congratulations, @Neola06! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Neola06: 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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