For "operational" notes at volume, keeping that segregated with a different muscle memory and organizational thesis is a fine idea, having all secure notes in literally the same tool is probably an over-abstraction.

For that reason, I like this idea, but think I wouldn't drag Tauri into it, would rather it stay SwiftUI or such to minimize the dependency footprint. As suggested by the various Electron wallet app compromises, keep software supply chain libs away from most critical secrets please.

For those thinking "but I only want one secure store", a brief survey:

To point of other comment here, KeePassXC has supported item templates including for secure notes for some time:

https://github.com/keepassxreboot/keepassxc/issues/8228

This discussion of KeePassXC for notes also mentions BitWarden and ProtonPass:

https://guitarguy234.wordpress.com/2024/10/07/using-keepassx...

For what it's worth, 1Password Secure Note feature shares most features here:

https://1password.com/features/secure-notes/

Since we're talking AppleOS, Apple Notes also supports independently encrypted notes surprisingly thoroughly:

https://support.apple.com/en-gb/guide/security/sec1782bcab1/...

For a not-at-all-secured open clipping grabber in the sense it feeds an open knowledge base ecosystem tool storing your information in YAML properties headed Markdown text, consider:

https://obsidian.md/clipper