Replaces `@silverwind/vue3-calendar-heatmap` with an inlined SVG
implementation. Renders pixel-identically to `main`, drops the
`onMounted` legend viewBox workaround, and uses tippy's
`createSingleton` for the hover tooltip. Adds an e2e test for tooltip
display.
This is a prereq for migrating tippy.js to
[floating-ui](https://github.com/floating-ui/floating-ui) to avoid
having two tooltip libs active.
<img width="861" height="168" alt="image"
src="https://github.com/user-attachments/assets/99343cf6-6e09-42c7-a80d-63dbf33cf56a"
/>
---
This PR was written with the help of Claude Opus 4.7
---------
Co-authored-by: Claude (Opus 4.7) <noreply@anthropic.com>
Co-authored-by: Nicolas <bircni@icloud.com>
Ran most of the Less files through the Less compiler and Prettier and
then followed up with a round of manual fixes.
The Less compiler had unfortunately stripped all `//` style comments
that I had to restore (It did preserve `/* */` comments). Other fixes
include duplicate selector removal which were revealed after the
transpilation and which weren't caught by stylelint before but now are.
Fixes: https://github.com/go-gitea/gitea/issues/15565