Okay, here's a Proof of Concept of how it could work hosted somewhere else. It remembers your list but does *not* include the pictures (though they could be re-added by hosting them somewhere else (one of the wikis?) or maybe there's a way to add them to codepen or some similar site). Also, you need to have third-party cookies enabled in your browser for it to remember your checklist, which is... not ideal. But anyone could create their own (free) codepen account and add a pretend wave to see what's involved and if it's something you feel like doing a few times per year. If someone went down this route I'd help them optimize this page a little further from this quick-and-dirty PoC.
https://codepen.io/drewbenn/full/jOOyjEx
If you want to import your list, use the Share button on my normal page and take everything starting with the question mark and add it to the end of that link, so you'd get like:
https://codepen.io/drewbenn/full/jOOyjEx...ff&wave2=f .....
Then hit the Save button on the codepen page and go back to the first link I shared to see that it restored your full checklist.
To see the code, hit the "Change View" button at the top and change to "Editor View." You only need to look at the html code for now, so make that first pane wider, and scroll through that if you want to see the guts of how waves are added.
https://codepen.io/drewbenn/full/jOOyjEx
If you want to import your list, use the Share button on my normal page and take everything starting with the question mark and add it to the end of that link, so you'd get like:
https://codepen.io/drewbenn/full/jOOyjEx...ff&wave2=f .....
Then hit the Save button on the codepen page and go back to the first link I shared to see that it restored your full checklist.
To see the code, hit the "Change View" button at the top and change to "Editor View." You only need to look at the html code for now, so make that first pane wider, and scroll through that if you want to see the guts of how waves are added.