This PR is a port of https://github.com/zed-industries/zed/pull/23551 to
Zed Stable.

Release Notes:

- Added support for DeepSeek to the Assistant.

Cherry-picked Avoid panics when normalizing completion label with
invalid ranges (#23712)

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

Co-authored-by: Kirill Bulatov <kirill@zed.dev>

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

This is a backport of https://github.com/zed-industries/zed/pull/23555
to Stable, as we couldn't cherry-pick the fix cleanly.

Release Notes:

- Fixed a potential panic in handling of Git statuses.

Cherry-picked Fix LSP violation when dismissing server notifications
(#23531)

Part of https://github.com/zed-industries/zed/issues/22606
Closes https://github.com/zed-industries/zed/issues/23509

When a user sees an odd notification from the language server like

<img width="508" alt="image"

src="https://github.com/user-attachments/assets/6f5ef1aa-0f09-4705-a02a-aaf81dd8620c"
/>

they usually dismiss that.

Zed uses channels to wait and handle user interactions with such
notifications, and, due to `?`, sends back
```json
{"jsonrpc":"2.0","id":1,"error":{"message":"receiving from an empty and closed channel"}}
```

which is not spec-compliant:

https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#window_showMessageRequest

> Response:
>
> * result: the selected

[MessageActionItem](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#messageActionItem)
| null if none got selected.
> * error: code and message set in case an exception happens during
showing a message.

Unfortunately, vtsls (and, potentially, others) crash if receive such
non-compliant requests, and do not get back.

After the fix, the message is correct:
```json
{"jsonrpc":"2.0","id":1,"result":null}
```


Release Notes:

- Fixed vtsls crashing on notification dismiss

Co-authored-by: Piotr Osiewicz <piotr@zed.dev>

Co-authored-by: Kirill Bulatov <kirill@zed.dev>
Co-authored-by: Piotr Osiewicz <piotr@zed.dev>

- Closes: https://github.com/zed-industries/zed/issues/22521
- Follow-up to: https://github.com/zed-industries/zed/pull/22376

Cherry-picked Fix completion labels becoming overly large due to LSP
completion items with newlines (#23407)

Reworks https://github.com/zed-industries/zed/pull/23030 and
https://github.com/zed-industries/zed/pull/15087
Closes https://github.com/zed-industries/zed/issues/23352
Closes https://github.com/zed-industries/zed/issues/23310 

Zed's completion items use `label` from LSP completion items as a base
to show in the list:

https://github.com/zed-industries/zed/blob/d290da7dac922fdc67c4774cdd371fba23fe62e3/crates/project/src/lsp_store.rs#L4371-L4374

Besides that, certain language plugins append `detail` or
`label_details.description` as a suffix:

https://github.com/zed-industries/zed/blob/d290da7dac922fdc67c4774cdd371fba23fe62e3/crates/languages/src/vtsls.rs#L178-L188

Either of these 3 properties may return `\n` (or multiple) in it,
spoiling Zed's completion menu, which uses `UniformList` to render those
items: a uniform list uses common, minimum possible height for each
element, and `\n` bloats that overly.

Good approach would be to use something else:
https://github.com/zed-industries/zed/issues/21403 but that has its own
drawbacks and relatively hard to use instead (?).

We could follow VSCode's approach and move away all but `label` from
`CodeLabel.text` to the side, where the documentation is, but that does
not solve the issue with `details` having newlines.

So, for now, sanitize all labels and remove any newlines from them. If
newlines are found, also replace whitespace sequences if there's more
than 1 in a row.

Later, this approach can be improved similarly to how Helix and Zed's
inline completions do: rendering a "ghost" text, showing the
completion's edit applied to the editor.

Release Notes:

- Fixed completion labels becoming overly large due to LSP completion
items with newlines

Co-authored-by: Kirill Bulatov <kirill@zed.dev>

- Closes: https://github.com/zed-industries/zed/issues/22322

Related issue: https://github.com/zed-industries/zed/issues/20167

Release Notes:

- Changed the default keybinding to accept partial inline completions
from `ctrl-right` to `ctrl-cmd-right` on macOS, because `ctrl-right` is
already bound to jump to the end of the line.

Co-authored-by: Antonio <antonio@zed.dev>
Co-authored-by: Kirill <kirill@zed.dev>
Co-authored-by: Bennet <bennet@zed.dev>

Cherry-picked editor: Hide horizontal scrollbar if not visible (#23337)

This PR fixes two visual issues, that were caused by the fact that we
were always painting the horizontal scrollbar even if there is no
horizontal scrolling possible

Obscuring deleted lines when using the inline assistant:


https://github.com/user-attachments/assets/f8460c3f-403e-40a6-8622-65268ba2d875

Cutting off text even when horizontal scrolling is not possible:


https://github.com/user-attachments/assets/23c909f7-1c23-4693-8edc-40a2f089d4a8

This issue was only present in some themes (e.g. Nord, Catpuccin)


Closes #22716

Release Notes:

- Fixed an issue where horizontal scrollbars of editors would always be
painted (even if there is no horizontal scrolling to be done)

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

Cherry-picked Fix accepting partial inline completion (#23312)

Release Notes:

- Fixed a bug that could prevent accepting a partial inline completion.

Co-authored-by: Antonio Scandurra <me@as-cii.com>

- See:
https://github.com/zed-industries/zed/issues/22674#issuecomment-2593133447

Release Notes:

- macos: Added `fn-f` keyboard shortcut for fullscreen toggle.

Only run actions dependency-review-action if running in a PR action.

This broke when run as part of action for commit on main and on a
preview branch:
- https://github.com/zed-industries/zed/actions/runs/12793068921/job/35664998296
- https://github.com/zed-industries/zed/actions/runs/12793045639

Originally introduced in:
- https://github.com/zed-industries/zed/pull/21424

But was only tested with `merge_group` which has since been reverted.

This PR removes some comments in the `project_panel` that are just
restating what the code is doing.

Release Notes:

- N/A

These checks were not functioning as intended. Notably tests were
skipped for today's hotfix release of Preview
[v0.169.2-pre](https://github.com/zed-industries/zed/actions/runs/12790602047):

Separately these checks were flawed as they would only be considered
"docs only" if the diff between the PR branch base and main also did not
have any subsequent non-docs changes.

Reverting until we can figure out something better.

Today's Preview hotfix timed out during notarization:
- https://github.com/zed-industries/zed/actions/runs/12790602047/job/35656767355

I want to use this to implement ! in vim, so move it from terminal_view
to task, and split windows/non-windows more cleanly.

Release Notes:

- N/A

Closes #ISSUE

Release Notes:

- Fixed highlighting of ["tool"
directives](https://tip.golang.org/doc/go1.24#tools) in go.mod

Add `phi4` maximum context length (128K).
By default this clamps to `16384` but if you have enough video memory
you can set it higher or connect to a non-local machine via settings:

```json
"language_models": {
  "ollama": {
    "api_url": "http://localhost:11434",
    "available_models": [
      {
        "name": "phi4",
        "display_name": "Phi4 64K",
         "max_tokens": 65536
      }
    ]
  }
}
```

Release Notes:

- Improve support for Phi4 with ollama.

https://github.com/zed-industries/zed/pull/22934#issuecomment-2592239448
and myself had noted quite an increase in junk logging after that:


https://github.com/user-attachments/assets/b678d4ec-c301-4d0e-9a12-99aa7f6da0a2


Release Notes:

- N/A

Instead of eagerly calling `to_offset` on the anchor ranges for each
diagnostic in the direction of the search, work lazily in terms of
anchors and convert to offsets at the very end.

Release Notes:

- N/A

Fixes #22674

Release Notes:

- Fixed a bug binding to `fn-X` (where X is a printing key) on macOS

Release Notes:

- N/A

Co-authored-by: Agus <agus@zed.dev>
Co-authored-by: Bennet <bennet@zed.dev>
Co-authored-by: Antonio <antonio@zed.dev>

Release Notes:

- N/A

---------

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

Release Notes:

- N/A

---------

Co-authored-by: Thorsten <thorsten@zed.dev>
Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Agus Zubiaga <hi@aguz.me>

Closes #23042

Release Notes:

- Fixed inline completions (Copilot, Supermaven, ...) still being
visible sometimes after leaving Vim's insert mode.

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

Release Notes:

- N/A

---------

Co-authored-by: Danilo <danilo@zed.dev>
Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Thorsten Ball <mrnugget@gmail.com>

Old:

```settings.json
{
  "features": {
    "inline_completion_provider": "zeta"
  }
}
```

New & cool:

```settings.json
{
  "features": {
    "inline_completion_provider": "zed"
  }
}
```

Release Notes:

- N/A

Release Notes:

- (temporarily) Removes the linux "save file as root" feature while we
figure out bugs.

Updates https://github.com/zed-industries/zed/pull/22045

This fixes a bug that prevents unstaging added files.

I've also removed the batching/debouncing logic in the long-running task
that launches the git invocations---I added this originally but I don't
think it's really necessary.

Release Notes:

- N/A

This PR moves the `IconDecoration` and `DecoratedIcon` components to
their own modules.

Release Notes:

- N/A

This PR pulls the directory and chevron icons out of the
`IconTheme::file_icons` collection and promotes them to named fields.

This makes things less stringly-typed when looking up these icons.

Release Notes:

- N/A

This PR cleans up some doc comments for the `AppContext.

Release Notes:

- N/A

This PR adds the initial concept of an `IconTheme` and refactors
`FileIcons` to use it to resolve the icons.

The `IconTheme` will ultimately be used to allow users to select a
different set of icons to use. Currently, however, this is just laying
the foundation for that work.

The association between file types and icons is now handled by the icon
theme when we resolve file icons. This mapping has been moved out of
`file_types.json` and into `icon_theme.rs`.

Release Notes:

- N/A

This PR adjusts the design of the assistant 2 threads with the goal of
reducing visual busyness. My intention is to remove the amount of lines
and borders given it is a relatively tight space. It also refines the
"generating" floating container style, finally leveraging linear
gradients that were recently added to GPUI! Now, we only display headers
for "you" messages. Assistant responses will be rendered right in the
panel; not bounded by a card container.

<img width="800" alt="Screenshot 2025-01-14 at 7 08 39 PM"
src="https://github.com/user-attachments/assets/a8ffa780-0ef2-4d4b-ae19-3f02fd2d63a6"
/>

Release Notes:

- N/A

Release Notes:

- N/A

- Reverts zed-industries/zed#22904
- See also: https://github.com/zed-industries/zed/issues/8580

After using it full-time for a day I very much think an implicit "mark
mode" when the emacs base keymap is enabled is the wrong approach.

Release Notes:

- Reverted "Add emacs keybindings for mark emulation" #23146 (main only)

#### Release Notes:

- Added support for [LM Studio](https://lmstudio.ai/) to the Assistant.

#### Quick demo:


https://github.com/user-attachments/assets/af58fc13-1abc-4898-9747-3511016da86a

#### Future enhancements:
- wire up tool calling (new in [LM Studio
0.3.6](https://lmstudio.ai/blog/lmstudio-v0.3.6))

---------

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

Release Notes:

- N/A

- Clicking checkbox in the header stages or unstages all changes
- Adds tooltips to header checkbox
- Addis the ability for checkboxes to have tooltips
- Ensure an entry in the list is always selected
- Hide revert all button for now

Release Notes:

- N/A

This just opens the file for the selected `GitListEntry` right now;
we'll add back integration with the project diff view later.

Release Notes:

- N/A

---------

Co-authored-by: Nate <nate@zed.dev>

Turns the "esc to cancel" label into a button so it can be dispatched
via click or keyboard. The keybinding isn't hardcoded anymore.

![CleanShot 2025-01-14 at 13 44
22@2x](https://github.com/user-attachments/assets/a947f58b-7de2-400b-b95a-384b78c79697)


Release Notes:

- N/A