Push notifications

[afonsomota]

Description

This PR sets up a PWA service worker and implements push notifications as a mobile/desktop app.

Type of Change

• Bug fix (fixes an issue)
• New feature (adds functionality)
• Breaking change (breaks existing functionality)
• Documentation/Translation update

Related Issues

Implementation suggestion for discussion #228

Fixes #

Testing

How did you test this?
Some backend code tests regarding the push notification subscription and unsubscription. Also manually tested in MacOS and iOS the push functionality,

Commands run:

• npm run pre-push (linting + formatting + tests)
• Tested manually in browser
• Tested on mobile (if UI changes)

Screenshots

Checklist

• This is not an AI slop crap, I know what I am doing
• Code follows project style guidelines
• Self-reviewed my own code
• Added/updated tests (if applicable)
• Updated documentation (if needed)
• Database migrations included and tested (if applicable)
• Translation keys added and synced (if applicable)

[afonsomota]

Two things for discussion:

• I tried to make the app workable offline (PWA), but did not had time to complete that. There is a lot of code on cache, offline page and the SW is dynamically change to get the proper name for main.js. I can remove this to make the PR cleaner, but it should be simpler to start from here if I or someone goes for offline support in the future.

• There is a test notification functionality. Thought it was handy to stay since there is a lot of issues regarding app notification authorization in the OS. I used it for testing, but left it. We can hide it or remove it if you want.

[afonsomota]

Merged with main and did the necessary changes from routes to modules. Tests passed locally.