Here is an approach: Kirika

I’ve been happily using it in the last two months, and you point made me worry for the first time. Thanks for it!

But overall, I love the interface and will stay on it - maybe double-checking the backup routine now.

Try usememos.com with well-defined keywords. The search works well, the calendar view is helpful and It even has an integration using Open API.

Very simple and powerful tool.