UI mockups: introducing task_info and improving task_edit

### Describe your improvement idea or feature request

Often I'm tapping on a task to see it's details, without necessarily modifying anything. The task edit view is kind of lousy for that, as details are spread apart and span more than one screen. This set of mockups is a suggestion to address that. I would propose that on selecting a task from the task list, goes to task info view, and then, tapping on task details, goes to task edit view. On saving changes, the user should land back in task info (see changes summarized) then back to the list.
I've also illustrated a UI to create, view and edit annotations ( #382 ) although a simple text editor would be desirable.

### How would you like to see it implemented?

tedious UI fiddling

### Put here any screenshots or videos (optional)


### How can we contact you (optional)

_No response_

### Would you like to work on this issue?

None

### By submitting this issue, I have confirmed that:

- [X] I have starred the repo ⭐ and watched 👀 it on GitHub and followed the contribution guidelines.

Start by reviewing the existing task list, task edit view, and task selection and save navigation, then compare them with the attached task_info mockup. Done means selecting a task opens a separate information view, details lead to editing, saving returns to task info with changes summarized, and navigation can return to the list.

Written by the indexing model from the issue text.