Hello, Saltcorn developer!
I was surprised to find your resource, and it is very functional! Even better than some popular no-code platforms! But, unfortunately, I noticed that this platform is not being developed (or am I mistaken?)...
My first question is about code-free customization of the sidebar menu. Currently, it has a somewhat "fixed/standard" appearance - for example, I cannot change the color of the menu, I cannot make it "sticky" (so that the main menu container stays in one place and does not scroll asynchronously from the main page), move the sidebar collapse button up, freeze the menu logo header on top, etc.
How can I do this (apart from making global changes to HTML/CSS in the application's general settings)?
In conclusion, I can say that this is a very cool product with powerful "internal stuffing" (its functionality is so advanced that it is sufficient for creating fairly complex web systems for business). It lacks a little freedom in visual design. I would be happy to help within my capabilities (consulting as a user, testing capabilities).
Platform is definitely developed, look at the dates of the releases: https://www.npmjs.com/package/@saltcorn/cli?activeTab=versions
For more layout flexibility try another theme, e.g. tabler, material-design or any-bootstrap-theme