I like your presentation. Clear and clean.
While a current fantasy, I’d take this further and remove apps altogether rather than fixing the UI to better flow between apps.
My OPINION: People use a computer to accomplish something. Said differently, what people “want” from a computer is the accomplishment not the act of using apps to produce the accomplishment. Using this idea, it’s fair to say that people don’t want apps, they want results. Now for balance (in my fantasy ;) some folks enjoy and get something out of the production process beyond the result. The “act of creating” something with a computer can be an end or means in itself.
I came to this from focusing on the sometime mindnumbing number of actions it takes to produce something and have taken even more actions to save a few actions using automation programs like Keyboard Maestro (KM). This is only productive in the long run. In the near term it makes way way more work than it saves.
A big shift to simplify and reduce actions was to demote Apple Mail to utility status. This lead to the idea of all apps as utilities or better yet, system extentions. App functionality as system extentions allows for removing the Menu Bar/Dock/Finder/Desktop/Windows as anything you want to do is always available, always right at hand (or cursor location as the case my be) and the system evolves from that premise.
One actuality I can take now is to automate the moving of all incoming mail to the desktop with KM and use Hazel to move some of that to designated folders, leaving only that which needs addressing.
Then I build automation around using TextEdit (TE) as my primary word processor. Other word processing such as here or in social media or texting gets saved as TE docs and filed in my “one and only” Finder filing structure (FFS).
Now, actually, I still use multiple databases and their corresponding filing structures (Photos, Contacts, Calendar, Safari bookmarks, etc.) but still pull what I need from them and store in my “one and only” FFS.
While currently a small step towards eliminating apps, just getting to eliminate Mail’s filing structure is a grand simplification by not mantaining and referencing two filing systems (Finder’s and Mail’s).
Reimagining the total UI opens new perspectives on the actual current UI in a way that may not be available looking from moving the current UI forward.
I’ve found thinking from the end results back to the current UI without the constraint of the “app” paradigm is quite liberating. Your reimagined UI looks like it could remove some of the friction and distances of the current app paradigm which would be welcomed by at least some.