Capture the (easy-to-forget) logo recolour + theme-preview flow,
- new `notes_to_self/svgtool.py`: a headless-firefox svg helper
(`colors`/`recolor`/`preview`/`page`); its `page --theme
dark|light` injects a `localStorage` pin so a pydata `auto`-mode
build renders its dark variant in a screenshot — the only way to
verify theme-adaptive bits headlessly,
- `howtodocs.md`: a "Tweaking the logo" table (which file +
`color:` knob per context) and an `svgtool` section that breaks
down the `--theme` trick for the sphinx-rusty.
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Gud Boi