Cherry-picked Fix inline assist deletion blocks (#15651)

After the changes in #15536, block decorations need to be given an
explicit height if their content doesn't consume height on its own. We
missed that inline transformation deletion decorations didn't do this,
creating weird results. This fixes the issue and prevents block
decorations from ever having a zero height. That helps avoid major
weirdness, but this still a bit of a gotcha.

We need to back port this to Preview Channel (0.147.x)

Release Notes:

- N/A

---------

Co-authored-by: Antonio <antonio@zed.dev>

Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Antonio <antonio@zed.dev>

We were reporting file count as worktree entry count, which led to us
missing some of the entries in /file command completion.

/cc @bennetbo

The other components that used `PathMatchCandidateSet` are
`/diagnostics` and file finder. File finder is unaffected, as it used
`Candidates::Files` - thus previously reported count was correct for it;
`/diagnostics` were using `::Entries` as well, so it could miss entries
just like `/files`.

Release Notes:

- Fixed /file and /diagnostics slash commands omitting entries in it's
completions menu.

Follow-up of https://github.com/zed-industries/zed/pull/14727

Release Notes:

- Fixed multi buffer context menus not showing properly

Co-authored-by: Max Brunsfeld <max@zed.dev>

Release Notes:

- N/A

Co-authored-by: Nathan <nathan@zed.dev>

This PR renames and added a new pane event to indicate the difference
between `removing` and `removed` event. This change is needed for the
debugger implementation, if you close a pane we have to send a
`terminateThread` request to the adapter because it's not supported to
reopen a pane. So when the pane is removing we have to know what thread
it is what is stored on the panel itself, so we have to be able to get
this information before the pane is actually removed.

So my idea how to fix this was by adding a new event called
`RemovedItem` which is a rename of `RemoveItem` which also makes a bit
more sense because the item is removed at that point. And seeing the
name `RemoveItem` does not really say that it's removed, more like we
are removing the item.

/cc @mikayla-maki

Release Notes:

- N/A

Release Notes:

- N/A

---------

Co-authored-by: Nathan <nathan@zed.dev>
Co-authored-by: Max <max@zed.dev>

Release Notes:

- N/A

There was/is some race condition that gets triggered only with the
zed.dev provider when opening the provider that would cause a
double-borrow on workspace.

This PR fixes the issue by cloning the workspace weakly. Turns out we
can go very far with just the weak reference.

We're still a bit unsure why exactly the race condition happened, since
it's hard to reproduce, but we're working on configuration
view/management in #15490 anyway.

Release Notes:

- N/A

Co-authored-by: Bennet <bennet@zed.dev>

- reverts commit 66ada3e44c047d828efbc269655476c12eefe876.
- change default `option_as_meta` to true

Before, we missed "successful" responses with the API errors, now they
are properly shown in the assistant panel.


![image](https://github.com/user-attachments/assets/0c0936af-86c2-4def-9a58-25d5e0912b97)


Release Notes:

- N/A

This is the revised version of #15527.

We also added new events to notify subscribers when new providers are
added or removed.

Co-Authored-by: Thorsten <thorsten@zed.dev>

Release Notes:

- N/A

---------

Co-authored-by: Thorsten <thorsten@zed.dev>
Co-authored-by: Thorsten Ball <mrnugget@gmail.com>

When used token count is below 80%, the Send button is displayed as
usual: no tooltip, regular style:


![image](https://github.com/user-attachments/assets/06198869-c49e-4231-b0cb-53b8f678c547)

When it exceeds 80% but below the `max_tokens` threshold, the button
starts to show as a warning, with the corresponding tooltip:

![warning](https://github.com/user-attachments/assets/83b02059-9610-4af7-97c6-9bca14364511)

When it is over the `max_token` threshold, the button starts to show as
an error, with another tooltip:

![error](https://github.com/user-attachments/assets/380d426a-cda9-4479-83e0-e018771291b6)

The buttons are not blocked in any case, in case the token calculation
is wrong, to allow using the assistant panel nonetheless.


Release Notes:

- N/A

Reverts zed-industries/zed#15527

We broke the assistant panel in the process...

Release Notes:

- N/A

Co-authored-by: Bennet <bennet@zed.dev>

Release Notes:

- N/A

Co-authored-by: Bennet <bennet@zed.dev>

Something seems to have broke on `main` in last few days.

Bug was reproducible like this:

- Open assistant panel
- Choose provider that wasn't authenticated
- See auth prompt
- Close the tab (!) in the assistant panel
- Reactivate the assistant panel
- Bug: panel is blank!

This fixes the bug by consolidating the behavior of checking credentials
and showing auth prompt.

Release Notes:

- N/A

With zed.dev provider becoming more popular, it helps alleviate
confusion when showing not only the model name but also the provider
name.

Release Notes:

- N/A

This fixes an issue where the window's hovered state would be incorrect,
causing the cursor not to update because it would think the window
wasn't hovered ([relevant
check](https://github.com/zed-industries/zed/blob/a03beeeb5bcce3fbb464a5d2a06a6ae47e8dda92/crates/gpui/src/window.rs#L3016-L3017)).

The code here doesn't really seem to make sense, since there's already
the `XinputEnter` and `XinputLeave` events that indicate mouse focus
state on the window. The properties change event wouldn't necessarily
indicate when mouse focus changes.

Thanks @Emc2356 for reporting this on the Discord and helping figure out
the issue!
 
Release Notes:

- Linux: Fixed the cursor sometimes not changing on X11

This PR adds a new `GET /billing/subscriptions` endpoint to collab for
retrieving the subscriptions to display on the account settings page.

Release Notes:

- N/A

This PR makes it so we always construct a real HTTP client in the
`ExtensionBuilder`.

This used to be the case, but was inadvertently changed in
https://github.com/zed-industries/zed/pull/15470.

Release Notes:

- N/A

This PR updates the user menu to show the user's current plan.

Also adds a new RPC message to send this information down to the client
when Zed starts.

This is behind a feature flag.

Release Notes:

- N/A

---------

Co-authored-by: Max <max@zed.dev>

- Disable Terminal ctrl-a (conflicts with readline).
- Standardize modifier order to use ctrl-shift instead of shift-ctrl to match existing keys.
- Move ctrl-shift-c (collab) to \!Terminal context (fix flickering in terminal right click menu).
- Consolidate two Terminal blocks in linux keybind

This PR reworks how we process Stripe events for reconciliation
purposes.

The previous approach in #15480 turns out to not be workable, on account
of the Stripe event IDs not being strictly in order. This meant that we
couldn't reliably compare two arbitrary event IDs and determine which
one was more recent.

This new approach leans on the guidance that Stripe provides for
webhooks events:

> Webhook endpoints might occasionally receive the same event more than
once. You can guard against duplicated event receipts by logging the
[event IDs](https://docs.stripe.com/api/events/object#event_object-id)
you’ve processed, and then not processing already-logged events.
>
> https://docs.stripe.com/webhooks#handle-duplicate-events

We now record processed Stripe events in the `processed_stripe_events`
table and use this to filter out events that have already been
processed, so we do not process them again.

When retrieving events from the Stripe events API we now buffer the
unprocessed events so that we can sort them by their `created` timestamp
and process them in (roughly) the order they occurred.

Release Notes:

- N/A

Release Notes:

- N/A

Release Notes:

- N/A

Release Notes:

- Fixed editor::AcceptPartialInlineCompletion keybind to match VSCode
([#15487](https://github.com/zed-industries/zed/issues/15487)).

Release Notes:

- N/A

Release Notes:

- N/A


Currently, the `img` element provided by GPUI only supports FilePath or
URL, but in actual applications we need to let `img` load an image
embedded in Assets.

The `svg` element can currently support this, but `img` cannot.

For example:

We have such an Assets directory:

```
assets
|- icons
|- images
|--- foo.png
```

```rs
// If give a path, considered an Asset
img("images/foo.png");
// If give a URI, considered a Remote image
img("https://foo.bar/images/foo.png");
// If give a PathBuf, considered a Local file
img(PathBuf::from("path/to/foo.png"));
```


## Example test

```
cargo run -p gpui --example image 
```

<img width="827" alt="image"
src="https://github.com/user-attachments/assets/e45dcf7f-4626-4fb0-aca9-9b6e1045a952">

---------

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

We also eliminate the `completion` crate and moved its logic into
`LanguageModelRegistry`.

Release Notes:

- N/A

---------

Co-authored-by: Nathan <nathan@zed.dev>

Same as /tabs command outputs them

Before:
![Screenshot 2024-07-30 at 16 52
11](https://github.com/user-attachments/assets/acf1c79e-4607-41fc-bd5e-b20dc668eff4)

![Screenshot 2024-07-30 at 16 52
03](https://github.com/user-attachments/assets/dd7fa42f-3ba8-4f1c-9420-2a0246df64b7)

After:
![Screenshot 2024-07-30 at 16 53
16](https://github.com/user-attachments/assets/ee866ecb-2142-4303-9385-c6b856310d43)

![Screenshot 2024-07-30 at 16 53
21](https://github.com/user-attachments/assets/d42b9c77-d5e9-4aaf-8de9-3b160078e622)


Release Notes:

- N/A

This PR improves our Stripe event handling by keeping track of the last
event we've seen for each record.

The `billing_customers` and `billing_subscriptions` tables both have a
new `last_stripe_event_id` column. When we apply an event to one of
these records, we store the event ID that was applied.

Then, when we are going through events we can ignore any event that has
an ID that came before the `last_stripe_event_id` (based on the
lexicographical ordering of the IDs).

Release Notes:

- N/A

This PR makes it easier to specify custom models for the Google, OpenAI,
and Anthropic provider:

Before (google):

```json
{
  "language_models": {
    "google": {
      "available_models": [
        {
          "custom": {
            "name": "my-custom-google-model",
            "max_tokens": 12345
          }
        }
      ]
    }
  }
}
```

After (google):

```json
{
  "language_models": {
    "google": {
      "available_models": [
        {
          "name": "my-custom-google-model",
          "max_tokens": 12345
        }
      ]
    }
  }
}
```

Before (anthropic):

```json
{
  "language_models": {
    "anthropic": {
      "available_models": [
        {
          "custom": {
            "name": "my-custom-anthropic-model",
            "max_tokens": 12345
          }
        }
      ]
    }
  }
}
```

After (anthropic):

```json
{
  "language_models": {
    "anthropic": {
      "version": "1",
      "available_models": [
        {
          "name": "my-custom-anthropic-model",
          "max_tokens": 12345
        }
      ]
    }
  }
}

```

The settings will be auto-upgraded so the old versions will continue to
work (except for Google since that one has not been released).

/cc @as-cii 

Release Notes:

- N/A

---------

Co-authored-by: Thorsten <thorsten@zed.dev>

This simplifies `PathWithPosition` by making the common use case
concrete and removing the manual, incomplete Windows path parsing.
Windows paths also don't get '/'s replaced by '\\'s anymore to limit the
responsibility of the code to just parsing out the suffix and creating
`PathBuf` from the rest. `Path::file_name()` is now used to extract the
filename and potential suffix instead of manual parsing from the full
input. This way e.g. Windows paths that begin with a drive letter are
handled correctly without platform-specific hacks.

Release Notes:

- N/A

Previously, the following lead to a bug:

1. Set OpenAI key
2. Switch to Anthropic
3. Restart Zed
4. Switch provider to OpenAI -> get prompted for authentication prompt

With this change, you won't get prompted for the OpenAI key again.

Release Notes:

- N/A

Co-authored-by: Bennet <bennet@zed.dev>

Release Notes:

- N/A

Additionally, I've generalized the implementation of tab switcher so
that - instead of explicitly listing panels it supports (at the time of
writing it was just the terminal panel and nothing else), it now relies
on Panel::pane trait method. As long as that's implemented, you get a
tab switcher support for free.

Release Notes:

- Added support for tab switcher in Assistant panel.

This adds the optional `PRESERVED_KEYS` constant to the `Settings`
trait,
which allows users of the trait to specify which keys should be written
to
the settings file, even if their current value matches the default
value.

That's useful for tagged settings that have, for example, a `"version"`
field
that should always be present in the user settings file, so we can then
reparse
the user settings based on the version.

Co-Authored-By: Thorsten <thorsten@zed.dev>

Release Notes:

- N/A

---------

Co-authored-by: Thorsten <thorsten@zed.dev>

Release Notes:

- N/A

---------

Co-authored-by: Nathan <nathan@zed.dev>

Broke CI after merging #14842 

Release Notes:

- N/A

Co-authored-by: Thorsten <thorsten@zed.dev>

## Before 

https://github.com/user-attachments/assets/affb8407-a20e-4258-a8f7-b271da5d7b77

## After

https://github.com/user-attachments/assets/654fe7b9-330a-40c8-8885-72e69fa85b0a

Release Notes:

- Hide blinking cursor when window is deactivated ([4710](https://github.com/zed-industries/zed/issues/4710))

# Summary

This commit implements Github Copilot Chat support within the existing
Assistant panel/framework. It required a little bit of trickery and
internal API modification, as Copilot doesn't use the same
authentication-style as all of the existing providers, opting to use
OAuth and a short lived API key instead of a straight API key. All
existing Assistant features should work.

Release Notes:
- Added Github Copilot Chat support
([#4673](https://github.com/zed-industries/zed/issues/4673)).

## Screenshots
<img width="1552" alt="A screenshot showing a conversation between a
user and Github Copilot Chat within the Zed editor."
src="https://github.com/user-attachments/assets/73eaf6a2-792b-4c40-a7fe-f763bd6417d7">

---------

Co-authored-by: Bennet Bo Fenner <bennet@zed.dev>

This PR lays the initial groundwork for using the Stripe events API to
reconcile the data in our system with what's in Stripe.

We're using the events API over webhooks so that we don't need to stand
up the associated infrastructure needed to handle webhooks effectively
(namely an asynchronous job queue).

Since we haven't configured the Stripe API keys yet, we won't actually
spawn the reconciliation background task yet, so this is currently a
no-op.

Release Notes:

- N/A

This PR adds a new `billing_customers` table to hold the billing
customers.

Previously we were storing both the `stripe_customer_id` and
`stripe_subscription_id` in the `billable_subscriptions` table. However,
this creates problems when we need to correlate subscription events back
to the subscription record, as we don't know the user that the Stripe
event corresponds to.

By moving the `stripe_customer_id` to a separate table we can create the
Stripe customer earlier in the flow—before we create the Stripe Checkout
session—and associate that customer with a user. This way when we
receive events down the line we can use the Stripe customer ID to
correlate it back to the user.

We're doing some destructive actions to the `billing_subscriptions`
table, but this is fine, as we haven't started using them yet.

Release Notes:

- N/A

This PR adds a new `POST /billing/subscriptions/manage` endpoint that
can be used to manage a billing subscription.

The endpoint accepts a `github_user_id` to identify the user, as well as
an optional `subscription_id` for managing a specific subscription. If
`subscription_id` is not provided, it try and use the active
subscription, if there is only one.

Right now the endpoint only supports cancelling an active subscription.
This is done by passing `"intent": "cancel"` in the request body.

The endpoint will return the URL to a Stripe customer portal session,
which the caller can redirect the user to.

Here's an example of how to call it:

```sh
curl -X POST "http://localhost:8080/billing/subscriptions/manage" \
     -H "Authorization: <ADMIN_TOKEN>" \
     -H "Content-Type: application/json" \
     -d '{"github_user_id": 12345, "intent": "cancel"}'
```

Release Notes:

- N/A

This PR adds a new `POST /billing/subscriptions` endpoint that can be
used to initiate a billing subscription.

The endpoint will use the provided `github_user_id` to look up a user,
generate a Stripe Checkout session, and then return the URL.

The caller would then redirect the user to the URL to initiate the
checkout flow.

Here's an example of how to call it:

```sh
curl -X POST "http://localhost:8080/billing/subscriptions" \
     -H "Authorization: <ADMIN_TOKEN>" \
     -H "Content-Type: application/json" \
     -d '{"github_user_id": 12345}'
```

Release Notes:

- N/A

Super simple piping of logs from the Jupyter kernels to the Zed logs.

Release Notes:

- Added logging of stderr from Jupyter kernels to the Zed logs