Please delete this project and your comment.
If you want to be helpful, write native code that user can read, compile, and install, and persistently use without risk of backdoor-out-of-the blue.
I wouldn't trust this page with my passwords either, but not because of the reasons that you mention. I haven't checked, but maybe it is simple enough to read the code in its entirety and then self-host? If so, nothing wrong with that.
Content and dates can be changed.
Do 1password/lastpass extensions not include remote code/resources? Of course they do.
2. If you save this page to your disk, everything will still work offline.
But you need to make it easy to run on a local computer to convince the die hards. ;)
You created something cool and it pays tribute to a loved one.
Awesome.