Implements the new design for playground constraints. They're not in use
in segments yet, and strategy parameters have not been touched. This PR
establishes a pattern that we can follow for strategies and parameters
later.

The PR also includes a change in how the constraint item organizes its
children: it now takes care adding padding and spacing itself, instead
of the children doing that. It looks right most places, but segments
aren't quite right anymore. However, as this is behind a flag, I'd
rather fix that in a separate PR.
---------
Co-authored-by: Tymoteusz Czech <2625371+Tymek@users.noreply.github.com>
- new way of showing strategy variants
- fixed wrapping issue in strategy editing, for a lot of variants
defined (`SplitPreviewSlider.tsx` change)
- aligned difference between API and manually added types
Implements the new strategy list design for default strategies. Moves
the old impl into a legacy file. Also: removes the description from the
strategy item. From my digging, we only showed this for default strategy
items and it didn't really provide any useful information. The only
other place you can add a description is for custom strategies (at least
that I could find), but these are deprecated and we never show the
description when you apply the strategy anyway.
Rendered:

Without the flag (nothing changes):

Moves strategy titles and names onto the same line, as per the new
designs.
In doing so, I've also updated the component to use a more semantic
hgroup with the header being the strategy title if it exists or the
strategy name if not.
The downside of being more semantically correct here is that we need to
know what header level we want the strategy to use. In most cases,
that's 3 (e.g. flag name > environment > strategy, release plan >
milestone > strategy), but for plans on flag envs, it's 4 (flag name >
env > milestone name > strategy).
I've also taken the opportunity to fix a little mistake I made earlier.
`ol`s can only have `li` children, and I'd forgotten to wrap a nested
`ol` inside an `li`. The changes in `EnvironmentAccordionBody` all
relate to that change. Because we now have several layers of lists
nested within each other, dealing with styling and padding gets a little
tricky, but CSS has the power do help us out here.
Rendered:

Avoids absolutely positioning the drag handle by instead creating a two
column grid where column 1 is the drag handle, column two is the
milestone card. The grid has a negative margin based on the padding of
the form container. I wanted to avoid modifying the form container
component (because we use it in so many places), so I used css variables
to store the information and hook into that further down the line.
Rendered:
Wide:

Narrow:

## Known bugs and limitations
The current drag implementation has some issues if you try to drag
something over a large, expanded card. They'll trade places visually,
but when you let go, the revert back to where they were. We can avoid
that by modifying the onDrop function in the drag handler, but I don't
want to do that before checking all the other places where we do drag
and drop ([linear
ticket](https://linear.app/unleash/issue/1-3458/drag-and-drop-is-a-little-finicky)).
I also want to get UX to sign off on this before making those changes.
Here's an initial first pass of replacing the strategy lists in release
plan milestones.
The existing MilestoneCard has been moved to a Legacy file to avoid
conflicts.
This PR places the strategies in a list and changes the background color
of the list items (the strategies themselves still have a white
background, however).
It also re-orders the buttons in the footer and places the
milestone-level drag handle outside the milestone card.

## For later
Changing out the strategy list item itself hasn't been done yet. I want
to see if we can re-use the existing strategy draggable item instead of
making a copy. There's some dependencies on project path params etc that
need to be worked out first, though, so I'd prefer to do get these
initial changes through first.
Adjusts styling of the env dropdown now that we have both release plans
and strategies.
Key points:
- simplifies strategy separator, removes inherent height. Also: extracts
it from the draggable component (it has no business knowing whether to
add that or not)
- Puts release plans and strategies in the same list so that it becomes:
```markdown
- Release plan
- strategy 1
- strategy 2
- (OR) Strategy A
- (OR) Strategy B
```
- Adjusts some padding around to make it line up properly
- Swaps a couple conditional renders for ternaries
Rendered:

## Still todo:
Handle cases where you have >50 strats and we show the warning etc. It's
a little trickier because of how it interacts with release plans, so I
wanna leave that for later.
I'm also unsure about how we handle spacing today. All the little items
have their own different spacing and I'm not sure it won't get out of
sync, but I'm also not sure how else to handle it. We should look at it
later.
Updates the strategy list based on the new designs and moves the current
versions of the touched components into `Legacy...` files (the vast
majority of changes are that and updating imports). The relevant changes
to the components are listed in their original files.
Flag on:

Flag off:

## Next steps
There's two items to review for improving these current comments (also
noted inline):
- Whether to aria-hide the "or" separator or not (I need to read up a
bit and think whether it makes sense to show that or not)
- Changing the list of strategies into an actual ordered list (`ol`).
That'd reflect the semantics better.
Next would be checking the other places we use strategy lists and then
updating those too. In doing so, I might find that some things need to
be updated, but I'll handle those when I get there.
There's also handling release plans.
Makes the env selector on the flag page act the same way as the env
selector on the new project page or any of the filterable buttons in the
new project/flag dialogs.
Also slightly changes the styles of the existing dropdown lists to bring
them in line with the new env selector (more padding, full-width
highlights).
Selector:

Project/flag creation:
Before:

After:

## Technical notes
I was a little unsure how best to share the padding/spacing styles
between the search field and popover at first (as was requested by UX).
The easiest way (and most compliant with how we do it today) was to
define the spacing in a variable and move the relevant components into
the same file.
However, I actually think that using a CSS variable (e.g.
`--popover-spacing`) would be "better" here, but we don't really use
them much, so I've left that out for now. That said, if you agree, I'd
be more than happy to use that instead 🙋🏼
Fixes the issue where the skip link wouldn't take you to the main
content of the page anymore.
Also includes a few related minor semantic and a11y improvements:
1. The `main` element now only surrounds the actual main content of the
page. The sidebar is nav content and shouldn't be within it. The easiest
way to do this was to change the element that was previously a `main` to
a `div` and make the main content wrapper a `main` instead.
2. Makes the skip link target visible when focused. But invisible
otherwise. This has two benefits:
1. It's immediately obvious that using the skip link has worked. It
tells you that it's at the start of the main content.
2. Because the link now has text, it can be targeted by link search
(e.g. in Firefox, press `'` to search for links (I use this **a lot**)),
making it super easy to move your focus to the main content directly.
(Yes, landmark navigation should also work here, though, especially with
the `main` change).
The implementation of UI considerations of the skip link are based on
the CSS-tricks article [a deep dive on skipping to
content](https://css-tricks.com/a-deep-dive-on-skipping-to-content/)
from 2021.
Here's what it looks like when you skip to content:

When it doesn't have focus, it's invisible.
This makes the width of the highlight bars in the network dynamic and
based on the number of labels included in the chart.
Since the number of labels should always correspond to the number of
data points, this seems like a sensible approach.
With this, the label width will now be calculated on the fly, so even if
you resize the window or change the number of labels, the highlighting
will still work as expected.
Daily view:

Monthly aggregate:

The labels are now a little narrower on the daily graphs, but it avoids
them being super wide on the monthly graphs
As of PR #8935, we no longer support both text and title, and confetti
has been removed.
This PR:
- removes `confetti` from the toast interface
- merges `text` and `title` into `text` and updates its uses across the
codebase.
- readjusts the text where necessary.
This PR adds a header and a tooltip to the lifecycle widget. Most of the
changes in ProjectLifecycleSummary is indentation changes due to
wrapping the component in another row container.
Additionally, this PR touches the `HelpIcon` component because we'd like
the tooltip to be wider than what we currently set as the default for
the help icon. The help icon uses the html tooltip component, which has
a maxWidth prop, but it does not expose that. So I've adjusted it to let
you do that.
Header with tooltip:

Addressing some oversights that led to browser console errors.
This PR fixes console errors related to the recently introduced
highlight component (#8643) and tag row component in the new flag
metadata panel (#8663).
Follow-up to: https://github.com/Unleash/unleash/pull/8642
Introduces a reusable `Highlight` component that leverages the Context
API pattern, enabling highlight effects to be triggered from anywhere in
the application.
This update refactors the existing highlight effect in the event
timeline to use the new Highlight component and extends the
functionality to include the Unleash AI experiment, triggered by its
entry in the "New in Unleash" section.
https://linear.app/unleash/issue/2-2840/make-the-unleash-ai-chat-window-resizable
This PR makes the Unleash AI chat resizable, providing users with a
flexible way to adjust the chat window's size.
Implements a reusable `Resizable` wrapper component that allows
configuration of:
- Minimum, maximum, and default sizes.
- Customizable resize handlers for each edge and corner of the
container.
- Optional resize event callbacks.
Double-clicking any resize handler maximizes the container along that
axis (or both, if it's a corner). If the container is already maximized,
double-clicking again will revert it to the default size.
This PR fixes all `invalidDomNesting` errors we're getting in our tests.
The culprit was the `Badge` icon we use, which wrapped its children in a
div. When that's used as a child of a `p` tag, that'd cause this to
trigger.
What I've done is to change the wrapping element to a span instead. The
Badge itself uses an `display: inline-flex`, so divs and spans should be
treated the same, meaning there's no visual change for this.
don't use `act` from `react-dom`. Instead, use act from `react`
directly, as advised by the deprecation notice.
This PR fixes all of the deprecated import warnings, updates some
testing libraries we use (and tests), and fixes one or two other
warnings.
After we implemented new feature flag creation flow, this are not used
anymore.
Creation is now handled by **CreateFeatureDialog**.
Also edit component can be minified, because it does not need so many
fields anymore.
Fixes an issue where the collaborator component would be smooshed
together when you have too many collaborators and too many flag tab
items.
The primary things I have done are:
1. Limit the amount of collaborators we show to 6 instead of 8. I
believe the number 8 was arbitrary, so let's go with 6 for now.
2. Instead of using a fixed gap, use a separator element that grows up
to a certain limit. I've added a `Separator` component, which is an
empty div with flex-grow. It feels like you should be able to do that
with gap too, but I can't think of how right now.
3. Don't allow collaborator component text (or avatars) to wrap. We
don't have a lot of space in this header, so let's keep it tight.
Additionally, I've added the `className` prop to the AvatarGroup
component so that it can be styled externally. I also cleaned up some
naming that was left in while I was at it.
Before:

After:

Fixes a bug introduced with the new tooltips where the system user was
shown as "User ID n" instead of "System". The "n" in this case is
actually the user's index number in the list of project owners
(including duplicates).
There's a few things happening:
1. Change the object for system owners: use `name` instead of
`description`. At the same time, remove the `description` property
completely because it's not used at the moment.
2. Remove the assignnment of `id: objectId(user)` to the user sent to
the User Avatar component. This was a leftover from when we split out
the AvatarGroup component, and is not something we use anymore.
Before:

After:

Extracts the Avatar Group component into a `common` component and adds a
standard tooltip to all avatars.
Relates to linear issue 1-2606
This is a suggestion / proof of concept for how we can solve it. While I
think we can merge this as is, I'd also be happy to take any discussions
on other ways to approach it etc.
## Why are these changes made together?
Because extracting the avatar group without adding the new tooltip data
made the existing tooltip misbehave (it'd show up in the top left of the
screen, not synced to the avatar in any way).
I probably could have (and still can if you think it's prudent) split it
out such that the avatar gets a standardized tooltip first (and disable
it for the group card avatars), and split out the avatars in a
follow-up. Happy to do that if you think it's better.
## What does this mean?
It used to be that we had no consistent way of dealing with avatars and
tooltips. Some places had them, some places didn't. This change makes it
so that all avatars that we can show tooltips for will get the same
tooltip.
Previously, we had at least 4 different ways of dealing with tooltips:
- The HTML tooltip (that would be standardized with this PR) in the
project flags table

- The "title" that you'd get on your user avatar

- The group card list tooltip

- And sometimes you'd get nothing at all

with this change, we'll always show the same kind of tooltip if we can:

## What goes in the tooltip?
We use the `UserAvatar` component for a fair few different things and I
didn't want to extract separate components for all the different use
cases. Instead, I wanted to get an overview over what we use it for and
what is relevant info to show.
I found all the places we used it and tried to form an opinion.
This tooltip will work with a user's email, name, username, and id. If
there is no user (such as for empty avatars and avatars displaying only
"+n" for remaining members), we show no tooltip.
Following the example set by the group card avatars, we'll try to use
email or username (in that order) as the main bit of text. If the user
has an email or a username and also a name, the name will be used as
secondary text.
If the user does not have an email or username, but has a name, we'll
use the name as the main text.
If the user does not have an email, a username, or a name, we'll try to
show "User ID: N" if they have an id.
If they do not have a username, a name, an email, or an ID, we bail out
and show nothing.
## Why can you disable the tooltip?
In some cases, you might want to disable the tooltip because you have
more information to feed into it. An example of that is in the project
flags table, where we want to show more information in cases where the
user is 'unknown':

## Additional fixes
This PR also adds a few lines of CSS to fix a minor avatar layout bug.
Before:

After:

This change prevents long project names from blowing the form out of
proportion.
To do so, it:
1. sets `whitespace: no-wrap` on the button labels. Judging by the other
styles, this was the intention all along, but it didn't really come up
until now.
2. It also sets the label width for projects to 30ch,so that you'll get
to see quite a bit of the project name before it gets cut off.
It would be possible to set a dynamic width for this button based on the
longest project name, but I'm not sure it adds much value, so I'm
leaning towards keeping it simple.
Here's what the dynamic width would look like:
``` tsx
const projectButtonLabelWidth = useMemo(() => {
const longestProjectName = projects.reduce(
(prev: number, type: { name: string }) =>
prev >= type.name.length ? prev : type.name.length,
0,
);
return `${Math.min(longestProjectName, 30)}ch`;
}, [projects]);
```
What it looks like:

This PR makes the config dropdown list generic over its values, so that
you can pass stuff that isn't strings.
It also updates the existing impression data button to use booleans
instead.