Whoa... Your OS is just a pseudo-browser-nostr-client that can fetch note:s and maybe legacy web assets, render HTML/CSS and execute JavaScript.

All other nostr clients and apps are PWAs that the OS can retrieve from notes. Those PWAs can be their own nostr implementations or rely on the OS's built in nostr functionality and just display/interact with notes in specialized ways. It's notes all the way down.

nostr:nevent1qqs84yp5ppw758mthml5jvehzw9svjr3tnnnylmr7ddv76ycg8hg2jgpz9mhxue69uhkummnw3ezuamfdejj7q3qgcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqxpqqqqqqz0z4fex