chart weekly display improvement #2013

Describe the bug

This looks strange

1 year	2years
https://npmx.dev/package/@sveltejs/kit?modal=chart&start=2025-03-10&end=2026-03-08	https://npmx.dev/package/@sveltejs/kit?modal=chart&start=2024-03-10&end=2026-03-08
Default view when we land	Adding 1 more year to the view (going to 2024)

Additional context

Looking at it closely, I saw:

• that weekly grouping is happening from start to the end. When the week is not full, the last week displayed is only 1 or 2 days... so it's really small.
• Prediction is available only for month & year

Two options to fix this (that I have already locally! ^^)

Option A

Group from End to start, and drop the partial starting week.

That's nice and easy to do. But:

• Everyday, values are changing in the weekly mode (I love it as it's last rooling week!)
• it's not that consistant with monthy & yearly view that has a prediction and work with set periods

Option B

Have a prediction for weekly as well!

In addition, this prediction could do a linear estimation based on the last X points (4 by default)

or (To keep the same package)

It's working pretty well with all view!!! 🚀