fix: Charts tab now correctly shows the number of plots created

[creilly8]

Description

Closes issue #2603 .

There's no need to prep these specific plots. They all launch directly with no other menu, control, etc. Changed the action to plot_create.

Test by adding the Data Dictionary, Sample View, and/or Data Download to http://localhost:3000/?noheader=1&massnative=hg38-test,TermdbTest. The Charts tab should update accordingly.

Checklist

Check each task that has been performed or verified to be not applicable.

• Tests: added and/or passed unit and integration tests, or N/A
• Todos: commented or documented, or N/A
• Notable Changes: updated release.txt, prefixed a commit message with "fix:" or "feat:", added to an internal tracking document, or N/A

[xzhou82]

there are other plots that calls prepPlot(). this is the actual cause #2607

[creilly8]

there are other plots that calls prepPlot(). this is the actual cause #2607

@xzhou82 , this is the downstream effect of including plot_prep in nav -> https://github.com/stjude/proteinpaint/actions/runs/12795455953. I don't see these same errors in master. If no menu or separate control is launched then there is no need to use plot_prep.

[xzhou82]

thanks nav CI breaks. testing more

[creilly8]

Closing now that the changes in master clarified adding plot_prep does work. See changes in #2607.