Migrate timeline slider to reka-ui, fix tap not skipping correctly

[pierosavi]

Closes music-assistant/backlog#67

Migrated Vuetify slider to Reka's https://reka-ui.com/docs/components/slider
Since Reka's doesn't support ticks for chapters, I extended the component to add the functionality as close as possible

Screencast_20260603_222910.webm

I kept the UI as similar as possible to Vuetify's
Externalized the chapter computer, added tests

Screencast_20260603_223148.webm

[pierosavi]

I just noticed the PR #1855 from @kissu , even though we fixed the same issue we had different approaches, I went with replacing the component with Reka slider and added chapter ticks

Happy to pull their bounce fix into my branch so we have the best of both worlds, waiting for confirmation from maintainers

[kissu]

Haha, different approaches indeed. 🤗
The team is also migrating away from Vuetify so that makes sense to help from that angle. 💯

[MarvinSchenkel]

Absolute gold that the frontend is getting some love from the community <3. Steven is a bit swamped so close to the 2.9 release, but we'll pick this up verrry soon after the release next Wednesday 🙏

[kissu]

Yeah I figured but those FE contributions can definitely wait some time. 😄
And yes, it could definitely use some help to get to the extra mile with the migration/tooling! 💖