Implements client-side validation of constraint values before you can
add them to a constraint.
I've removed the extra server-side validation that used to happen for
each specific constraint, because the surrounding form itself uses
server side validation to check every constraint every time there's a
change. This is what controls disabling the submit button etc.
I wanna make the next PR a bit of a followup cleanup now that it's
clearer what properties we do and don't need.
<img width="371" alt="image"
src="https://github.com/user-attachments/assets/7c98708f-fcbe-40ca-8590-bb0f5b2ad167"
/>
<img width="361" alt="image"
src="https://github.com/user-attachments/assets/503d4841-d910-4e8e-b0ef-a3d725739534"
/>
Adds an "add value" with popover input for single-value fields
(numerical and semver operators).
The implementation re-uses the popover from the multi-value constraint
operators, so I've extracted it for re-use.
All current input types:
<img width="779" alt="image"
src="https://github.com/user-attachments/assets/ad522e4d-72ba-402c-ad7c-8609ef2fb3a8"
/>
For the new one, opening the popover when there's a value will
pre-select the value, so you can override it by typing immediately:
<img width="297" alt="image"
src="https://github.com/user-attachments/assets/31d18f9e-6ef9-4450-9d63-ca5034b59f19"
/>
Buttons look pretty identical:
<img width="784" alt="image"
src="https://github.com/user-attachments/assets/d96b0b0d-0cbb-4262-9ca8-4ec919cbfafb"
/>
## Discussion points
### Input type
I haven't set an input type anywhere on the popover yet. In theory, we
could use input type "number" for numerical inputs and I think it's
worth looking at that, but we don't do in the old implementation either.
I've added a task for it.
### Weird esc handling
This implementation uses a chip for the button/value display for the
single. In almost all cases it works exactly as I'd expect, but closing
the popover with esc moves your focus to the top of `body`.
Unfortunately, this isn't something we can address directly (trust me,
I've tried), but the good news is that this was fixed in mui v6. The
current major is v7, so we probably want to update before too long,
which will also fix this. More info in the MUI docs:
https://mui.com/material-ui/migration/upgrade-to-v6/#chip
I think that for the single value entry, losing focus on esc is a fair
tradeoff because it handles swapping states etc so gracefully. For the
multi-value operators, however, esc is the only way to close the
popover, so losing focus when you do that is not acceptable to me. As
such, I'll leave the multi-value input as a button for now instead.
(It's also totally fine because the button never updates or needs to
change).
Fixes a few small styling issues with the constraint value chips:
- Background color was wrong
- They shouldn't have a border when they're not focused
Different styles:
1. Keyboard focus
2. Mouse hover
3. No focus
4. No focus
5. Add values button for reference.
<img width="405" alt="image"
src="https://github.com/user-attachments/assets/ded98393-a7a8-4d4a-81ff-63a3f4d32184"
/>
Removes the condition to hide the value list if we use legal values.
In doing so, I also realized that focus handling when you delete the
last item in the constraint values list doesn't work if the add values
button isn't there (which it shouldn't be for legal values and more). So
I've hidden the add values button when it doesn't do anythnig helpful
(or for cases where we don't have designs yet). In cases where you don't
have the add values button and you delete the last constraint value,
we'll move the focus to the "delete constraint" button (that was easier
than making sure we pass refs all the way down into the operator select,
but we can change that later).
To facilitate this (refs coming from the parent component), I refactored
the value list component to accept the add values widget as a child (and
extracted it to its own file).
