Implement push notification system with PWA support

[Smartdevs17]

Description

Build a push notification system using VAPID protocol with service workers for Progressive Web App, delivering real-time payment and dispute notifications to users.

Acceptance Criteria

• VAPID key generation and management
• Push notification subscription management (subscribe/unsubscribe)
• Service worker registration with push event handling
• Notification categories with user preferences
• Click tracking and deep linking from notifications
• Fallback to in-app notifications when push unavailable

Technical Scope

• frontend/service-worker.ts
• frontend/components/PWAInstallPrompt.tsx
• backend/src/services/vapid.ts
• backend/src/services/push.ts
• backend/src/routes/push.ts
• Edge: notification permission revocation, service worker update cycle, notification grouping

[OmniZlatoon]

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

Good day maintainer, please I am committed to my work on drips and I assure you the job completion on time .I would love to work on this issue maintainer. Please Assign me and I'll get the job done.

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

[jadonamite]

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

Hi maintainer can i work on this issue I have read your requirements and i am ready to jump on this and send out the fix for your review ASAP

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

[oscar24357]

@oscar24357 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

hello maintainer, i would like to work on this issue, can you please assign me to it, thank you

ℹ️ Repo Maintainers: To accept this application, review their application or assign @oscar24357 to this issue.

[Caritajoe18]

@Caritajoe18 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

hello @Smartdevs17,
I am experience in typescript and would like to work on this issue,
Kindly assign to me.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Caritajoe18 to this issue.

[Tobiloba0]

@Tobiloba0 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi maintainer, I would love to work on this issue.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Tobiloba0 to this issue.

[drips-wave]

Congratulations, @Tobiloba0! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @Tobiloba0: 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

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊