This PR fixes an incorrect behavior in the model selector where we were
removing the focus from the selected item back to the very first item of
the list. Now, if you click/hit return on an item, focus is preserved
there. In other words, focus is always initially in the selected item.

### Before

https://github.com/user-attachments/assets/62b72b1f-4e32-4b4a-adff-dcf9a2c13a28

### After

https://github.com/user-attachments/assets/a8528933-da01-481a-96f3-0173a39a03c0

Release Notes:

- N/A

This PR caps the width of the model label in the selector trigger to a
certain size. This is fix the behavior of the popover dancing around,
given its popover position is anchored to a certain edge of the trigger,
and if the trigger size increases while you select different models with
different name lengths, the popover dances around.

### Before


https://github.com/user-attachments/assets/0854fa2b-9eb2-45fb-886d-bde1cd644dcf

### After

Note how even though the second item has the largest label, the popover
stays in place.


https://github.com/user-attachments/assets/06b60030-65dc-4f06-b486-3045042bbff0

Fixing that then means truncating the model name to keep it constrained
into a max-width.

<img width="500" alt="Screenshot 2025-01-27 at 11 38 14 AM"
src="https://github.com/user-attachments/assets/94ce9cc6-848c-4dac-86b8-321da75c3af3"
/>

Release Notes:

- N/A

This PR makes the model selector not render on top of its trigger.

<img width="800" alt="Screenshot 2025-01-27 at 12 02 01 PM"
src="https://github.com/user-attachments/assets/76c5ac6f-ae27-4b3d-a80a-3027042c75f8"
/>

Release Notes:

- N/A

When the out-of-tree file like `tasks.json` is-focus, tasks spawn with `ZED_WORKTREE_ROOT` unset.

Follow-up to: https://github.com/zed-industries/zed/pull/23425

Dev builds show panics related to completion label normalization

<details>
<summary>Panic</summary>

```
index out of bounds: the len is 103 but the index is 103
zed::reliability::init_panic_hook::{{closure}}::h78130eff43c84f6f+110375521
std::panicking::rust_panic_with_hook::hfe205f6954b2c97b+87457752
std::panicking::begin_panic_handler::{{closure}}::h6cb44b3a50f28c44+87456967
std::sys::backtrace::__rust_end_short_backtrace::hf1c1f2a92799bb0e+87449337
rust_begin_unwind+87456084
core::panicking::panic_fmt::h3d8fc78294164da7+7033011
core::panicking::panic_bounds_check::h9397cb495d89a72d+7033511
project::lsp_store::ensure_uniform_list_compatible_label::haf80316ce11edd67+72663592
project::lsp_store::populate_labels_for_completions::{{closure}}::hc93c3c540ef7d2d6+72642960
project::lsp_store::LspStore::completions::{{closure}}::{{closure}}::hb4b5432e24432ca8+72336627
async_task::raw::RawTask<F,T,S,M>::run::hf444c3dc07dd583b+68504803
<gpui::platform::linux::wayland::client::WaylandClient as gpui::platform::linux::platform::LinuxClient>::run::hbf5a316eb781a10d+50646579
gpui::platform::linux::platform::<impl gpui::platform::Platform for P>::run::hc85518d4552fc4cd+50496669
gpui::app::App::run::hca4e2eaf984ca6f6+109905269
zed::main::h849467ac1a6d32c9+110413414
std::sys::backtrace::__rust_begin_short_backtrace::h81b5ee155a7cf505+110835475
std::rt::lang_start::{{closure}}::h48a83f884cfb6865+110834761
std::rt::lang_start_internal::h5e7c81cecd7f0954+87382485
main+110425932
__libc_start_call_main+22789462491720
__libc_start_main_alias_1+22789462491915
_start+10436606
```
</details>

This can only happen when either `label.runs` or `label.filter_range`
has a range that's larger than the label text, which is an error.
Instead of panicking, log such errors and fall back to last index (which
is not really helpful, but still).

Release Notes:

- N/A

This will allow Windows GPUI applications that utilise the native title
bar to support the dark mode variant when the system user has dark mode
enabled in their system settings. [Related Win32
information](https://learn.microsoft.com/en-us/windows/apps/desktop/modernize/ui/apply-windows-themes)

| Before  | After |
| ------------- | ------------- |
|
![image](https://github.com/user-attachments/assets/50f3d131-8f41-4b91-8012-f8120b150033)
|
![image](https://github.com/user-attachments/assets/a36a6c6b-a469-49ba-85a8-9b55db9ea20f)
|

Release Notes:

- N/A

---------

Co-authored-by: 张小白 <364772080@qq.com>

Release Notes:

- Added auto-completion support for snippet files.


![image](https://github.com/user-attachments/assets/ad165fc7-a6e7-426c-8892-f7004515dfc7)

Release Notes:

- N/A

Release Notes:

- N/A

Fix a bug where a GPUI macro still used `ModelContext`
Rename `AsyncAppContext` -> `AsyncApp`
Rename update_model, read_model, insert_model, and reserve_model to
update_entity, read_entity, insert_entity, and reserve_entity

Release Notes:

- N/A

Release Notes:

- N/A

Release Notes:

- N/A

Release Notes:

- N/A

Closes #23451

reverts #23117 for MinGW. collab can't be compiled for MinGW because
webrtc itself doesn't support MinGW compilers

Release Notes:

- N/A

In the Windows test environment, the paths generated by `temp_tree()`
are symlink paths, which causes certain tests to fail.

I later noticed that when opening a project, we seem to always use
`canonicalize` to normalize the paths, as shown here:
https://github.com/zed-industries/zed/pull/21039.

This PR adopts a similar approach for the test environment to address
the issue.

Release Notes:

- N/A

Release Notes:

- N/A

Closes #23621

Change was in #23378. Also adds a comment to clarify why this is
inconsistent with all other uses of `bindings_for_action`.

Release Notes:

- N/A

There's still a bit more work to do on this, but this PR is compiling
(with warnings) after eliminating the key types. When the tasks below
are complete, this will be the new narrative for GPUI:

- `Entity<T>` - This replaces `View<T>`/`Model<T>`. It represents a unit
of state, and if `T` implements `Render`, then `Entity<T>` implements
`Element`.
- `&mut App` This replaces `AppContext` and represents the app.
- `&mut Context<T>` This replaces `ModelContext` and derefs to `App`. It
is provided by the framework when updating an entity.
- `&mut Window` Broken out of `&mut WindowContext` which no longer
exists. Every method that once took `&mut WindowContext` now takes `&mut
Window, &mut App` and every method that took `&mut ViewContext<T>` now
takes `&mut Window, &mut Context<T>`

Not pictured here are the two other failed attempts. It's been quite a
month!

Tasks:

- [x] Remove `View`, `ViewContext`, `WindowContext` and thread through
`Window`
- [x] [@cole-miller @mikayla-maki] Redraw window when entities change
- [x] [@cole-miller @mikayla-maki] Get examples and Zed running
- [x] [@cole-miller @mikayla-maki] Fix Zed rendering
- [x] [@mikayla-maki] Fix todo! macros and comments
- [x] Fix a bug where the editor would not be redrawn because of view
caching
- [x] remove publicness window.notify() and replace with
`AppContext::notify`
- [x] remove `observe_new_window_models`, replace with
`observe_new_models` with an optional window
- [x] Fix a bug where the project panel would not be redrawn because of
the wrong refresh() call being used
- [x] Fix the tests
- [x] Fix warnings by eliminating `Window` params or using `_`
- [x] Fix conflicts
- [x] Simplify generic code where possible
- [x] Rename types
- [ ] Update docs

### issues post merge

- [x] Issues switching between normal and insert mode
- [x] Assistant re-rendering failure
- [x] Vim test failures
- [x] Mac build issue



Release Notes:

- N/A

---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Cole Miller <cole@zed.dev>
Co-authored-by: Mikayla <mikayla@zed.dev>
Co-authored-by: Joseph <joseph@zed.dev>
Co-authored-by: max <max@zed.dev>
Co-authored-by: Michael Sloan <michael@zed.dev>
Co-authored-by: Mikayla Maki <mikaylamaki@Mikaylas-MacBook-Pro.local>
Co-authored-by: Mikayla <mikayla.c.maki@gmail.com>
Co-authored-by: joão <joao@zed.dev>

The pattern in Zed and in other editors is to use `cmd` to modify some
file-opening action to open it in a split rather than in the current
pane.

- In the project pane, a `click` opens a file, and a `cmd-click` opens
it in a split
- In the file finder, `enter` opens the file, and a `cmd-enter` opens it
in a split

It makes sense to me that if `alt-enter` opens a file from the excerpt,
that `cmd-alt-enter` opens it in a split, following the pattern above.

Note: I'm not auto-merging this, as others might disagree.
Note: I didn't touch the Vim binding.

Release Notes:

- Breaking Change: Changed `editor: open excerpts split` key binding to
`cmd-alt-enter` on macOS and `ctrl-alt-enter` on Linux.

Closes https://github.com/zed-industries/zed/issues/12024


https://github.com/user-attachments/assets/60ea3dbd-b594-4bf5-a44d-4bff925b815f

* Fixes incorrect line selection for certain corner cases

Before:

<img width="1728" alt="image"
src="https://github.com/user-attachments/assets/35aaee6c-c120-4bf1-9355-448a29d1b9b5"
/>

After:

<img width="1728" alt="image"
src="https://github.com/user-attachments/assets/abd97339-4594-4e8e-8605-50d74581ae86"
/>


* Reworks https://github.com/zed-industries/zed/pull/16420 to display
selection length with less performance overhead.
Improves the performance more, doing a single selections loop instead of
two.

* Fixes incorrect caret position display when text contains UTF-8 chars
with size > 1
Also fixes tooltop values for this case

* Fixes go to line to treat UTF-8 chars with size > 1 properly when
navigating

* Adds a way to fill go to line text editor with its tooltip on `Tab`

Release Notes:

- Fixed incorrect UTF-8 characters handling in `GoToLine` and caret
position

Follow-up to: https://github.com/zed-industries/zed/pull/23644

- Existing: `alt-enter` to open files from multi-buffer selections
- New: `alt-enter` to open multi-buffer from file selections

I updated the original PR changelog line.

Release Notes:

- N/A

Before: 


![bad](https://github.com/user-attachments/assets/ab20836a-b3bb-4b33-8ce4-eecc79d5f02f)


After:


![good](https://github.com/user-attachments/assets/40c328d1-2ef1-4a9b-9de9-9be9bba26756)


Release Notes:

- N/A

Bringing back part of #23631 which was reverted in #23636. Different but
related memory leak to what's described in #23008

Release Notes:

- N/A

Closes https://github.com/zed-industries/zed/issues/5126

Release Notes:

- Added an `editor: open selections in multibuffer` command.

New mechanism had introduced the following regressions:

* Windows tasks are not registering child exit properly, sometimes
getting stuck in dirty state (even with
https://github.com/zed-industries/zed/pull/23631):


https://github.com/user-attachments/assets/6d406f17-aa76-4012-9c3b-be72d6d5beae

* Overall, the terminal editing started to feel more sluggish, esp. in
regards to deletions (ctrl-w and backspace), tested on macOS:


https://github.com/user-attachments/assets/3a69fe2e-e394-45e8-8f51-0f5ac396cb24


Release Notes:

- N/A

Release Notes:

- N/A

<img
src="https://github.com/user-attachments/assets/cea93cfb-8a40-48c4-9d90-f1751c79603b"
width=400>



Release Notes:

- N/A

---------

Co-authored-by: Danilo <danilo@zed.dev>

Potentially fixes a bug where tasks are not marked as finished.

Release Notes:

- N/A

Closes #12553

* [x] Fix `diff_hunk_before`
* [x] Fix failure to show deleted text when expanding hunk w/ cursor on
second line of the hunk
* [x] Failure to expand diff hunk below the cursor.
* [x] Delete the whole file, and expand the diff. Backspace over the
deleted hunk, panic!
* [x] Go-to-line now counts the diff hunks, but it should not
* [x] backspace at the beginning of a deleted hunk deletes too much text
* [x] Indent guides are rendered incorrectly 
* [ ] Fix randomized multi buffer tests

Maybe:
* [ ] Buffer search should include deleted text (in vim mode it turns
out I use `/x` all the time to jump to the next x I can see).
* [ ] vim: should refuse to switch into insert mode if selection is
fully within a diff.
* [ ] vim `o` command when cursor is on last line of deleted hunk.
* [ ] vim `shift-o` on first line of deleted hunk moves cursor but
doesn't insert line
* [x] `enter` at end of diff hunk inserts a new line but doesn't move
cursor
* [x] (`shift-enter` at start of diff hunk does nothing)
* [ ] Inserting a line just before an expanded hunk collapses it

Release Notes:


- Improved diff rendering, allowing you to navigate with your cursor
inside of deleted text in diff hunks.

---------

Co-authored-by: Conrad <conrad@zed.dev>
Co-authored-by: Cole <cole@zed.dev>
Co-authored-by: Mikayla <mikayla@zed.dev>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
Co-authored-by: Michael <michael@zed.dev>
Co-authored-by: Agus <agus@zed.dev>
Co-authored-by: João <joao@zed.dev>

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [tokio](https://tokio.rs)
([source](https://redirect.github.com/tokio-rs/tokio)) | dependencies |
minor | `1.42.0` -> `1.43.0` |
| [tokio](https://tokio.rs)
([source](https://redirect.github.com/tokio-rs/tokio)) |
workspace.dependencies | minor | `1.42.0` -> `1.43.0` |

---

### Release Notes

<details>
<summary>tokio-rs/tokio (tokio)</summary>

###
[`v1.43.0`](https://redirect.github.com/tokio-rs/tokio/releases/tag/tokio-1.43.0):
Tokio v1.43.0

[Compare
Source](https://redirect.github.com/tokio-rs/tokio/compare/tokio-1.42.0...tokio-1.43.0)

### 1.43.0 (Jan 8th, 2025)

##### Added

-   net: add `UdpSocket::peek` methods ([#&#8203;7068])
-   net: add support for Haiku OS ([#&#8203;7042])
-   process: add `Command::into_std()` ([#&#8203;7014])
-   signal: add `SignalKind::info` on illumos ([#&#8203;6995])
-   signal: add support for realtime signals on illumos ([#&#8203;7029])

##### Fixed

- io: don't call `set_len` before initializing vector in `Blocking`
([#&#8203;7054])
- macros: suppress `clippy::needless_return` in `#[tokio::main]`
([#&#8203;6874])
-   runtime: fix thread parking on WebAssembly ([#&#8203;7041])

##### Changes

-   chore: use unsync loads for `unsync_load` ([#&#8203;7073])
-   io: use `Buf::put_bytes` in `Repeat` read impl ([#&#8203;7055])
-   task: drop the join waker of a task eagerly ([#&#8203;6986])

##### Changes to unstable APIs

- metrics: improve flexibility of H2Histogram Configuration
([#&#8203;6963])
-   taskdump: add accessor methods for backtrace ([#&#8203;6975])

##### Documented

- io: clarify `ReadBuf::uninit` allows initialized buffers as well
([#&#8203;7053])
- net: fix ambiguity in `TcpStream::try_write_vectored` docs
([#&#8203;7067])
-   runtime: fix `LocalRuntime` doc links ([#&#8203;7074])
- sync: extend documentation for `watch::Receiver::wait_for`
([#&#8203;7038])
-   sync: fix typos in `OnceCell` docs ([#&#8203;7047])

[#&#8203;6874]: https://redirect.github.com/tokio-rs/tokio/pull/6874

[#&#8203;6963]: https://redirect.github.com/tokio-rs/tokio/pull/6963

[#&#8203;6975]: https://redirect.github.com/tokio-rs/tokio/pull/6975

[#&#8203;6986]: https://redirect.github.com/tokio-rs/tokio/pull/6986

[#&#8203;6995]: https://redirect.github.com/tokio-rs/tokio/pull/6995

[#&#8203;7014]: https://redirect.github.com/tokio-rs/tokio/pull/7014

[#&#8203;7029]: https://redirect.github.com/tokio-rs/tokio/pull/7029

[#&#8203;7038]: https://redirect.github.com/tokio-rs/tokio/pull/7038

[#&#8203;7041]: https://redirect.github.com/tokio-rs/tokio/pull/7041

[#&#8203;7042]: https://redirect.github.com/tokio-rs/tokio/pull/7042

[#&#8203;7047]: https://redirect.github.com/tokio-rs/tokio/pull/7047

[#&#8203;7053]: https://redirect.github.com/tokio-rs/tokio/pull/7053

[#&#8203;7054]: https://redirect.github.com/tokio-rs/tokio/pull/7054

[#&#8203;7055]: https://redirect.github.com/tokio-rs/tokio/pull/7055

[#&#8203;7067]: https://redirect.github.com/tokio-rs/tokio/pull/7067

[#&#8203;7068]: https://redirect.github.com/tokio-rs/tokio/pull/7068

[#&#8203;7073]: https://redirect.github.com/tokio-rs/tokio/pull/7073

[#&#8203;7074]: https://redirect.github.com/tokio-rs/tokio/pull/7074

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "after 3pm on Wednesday" in timezone
America/New_York, Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about these
updates again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

Release Notes:

- N/A

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS45Mi4wIiwidXBkYXRlZEluVmVyIjoiMzkuOTIuMCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Release Notes:

- N/A

Closes #19706

Release Notes:

- Improved editor horizontal autoscroll to now place the cursor to the
left of the scrollbar rather than under it.

- Closes: https://github.com/zed-industries/zed/issues/20183

Adds a keybinding for opening/toggling focus to the git panel

Release Notes:

- N/A

Also changed rust tasks to be less mouthful.

Release Notes:

- Shortened Rust task labels.
- Task modal will now use full task label when it does not require
truncation.

This PR add a "Configure a Provider" button if the user gets to the
assistant panel with no provider configured. Then, upon configuring it,
they'll see a similar welcome message.

| No provider | Empty state |
|--------|--------|
| <img width="1233" alt="Screenshot 2025-01-24 at 12 25 48 PM"
src="https://github.com/user-attachments/assets/2f3c602f-9e46-4c79-95cd-4bb3717f68a3"
/> | <img width="1233" alt="Screenshot 2025-01-24 at 12 26 01 PM"
src="https://github.com/user-attachments/assets/a4a204dd-9531-45ab-89a2-f1d84f375a7b"
/> |

Release Notes:

- N/A

Just fine-tuning spacing, icon size and color, and ensure they're are
consistent throughout.

Release Notes:

- N/A

Closes #ISSUE

Release Notes:

- N/A

That's specifically when we're not rendering the user menu with an
Avatar. We were previously rendering a `ButtonLike` with unnecessary
flex styles there. Just a little fine-tune.

Release Notes:

- N/A

This PR disables the Assistant 2 Submit button when either there is no
message written in the editor or there's no model selected. To guide the
user, there will be a tooltip displayed on top of the button to indicate
what to do.

Release Notes:

- N/A

Just fine-tuning the copywriting and design here.

| Before | After |
|--------|--------|
| <img width="1233" alt="Screenshot 2025-01-24 at 9 28 30 AM"
src="https://github.com/user-attachments/assets/ca91a985-8a20-4ece-b0e4-3a6779db2fda"
/> | <img width="1233" alt="Screenshot 2025-01-24 at 9 27 49 AM"
src="https://github.com/user-attachments/assets/edc9c2ef-4ae0-4caf-a496-9887748673c9"
/> |

Release Notes:

- N/A

Doing this to enable customization in the Assistant 2 context picker.

Release Notes:

- N/A

Closes #23008

Release Notes:

- Fixed case where the terminal can leak memory when it produces events
at a faster rate than could be processed.

This PR adds persistence for threads in Assistant2.

Threads are now persisted to an LMDB database.

Release Notes:

- N/A

Fixes #23398 
Closes #23398

We'll bail on searches of files that we know are binary (thus even if we
were to find a match in them, they'd be thrown away by buffer loader).

Release Notes:

- Improved project search performance in worktrees with binary files