Enable CustomInferenceEndpoints feature flag in stable (#11450)

## Description
<!-- Please remember to add your design buddy onto the PR for review, if
it contains any UI changes! -->

## Linked Issue
<!--
Link the GitHub issue this PR addresses. Before opening this PR, please
confirm:
-->
- [ ] The linked issue is labeled `ready-to-spec` or
`ready-to-implement`.
- [ ] Where appropriate, screenshots or a short video of the
implementation are included below (especially for user-visible or UI
changes).

## Testing
<!--
How did you test this change? What automated tests did you add? If you
didn't add any new tests, what's your justification for not adding any?

Manual testing is required for changes that can be manually tested, and
almost all changes can be manually tested. If your change can be
manually tested, please include screenshots or a screen recording that
show it working end to end.

You can run the app locally using `./script/run` - see WARP.md for more
details on how to get set up.
-->

- [ ] I have manually tested my changes locally with `./script/run`

### Screenshots / Videos
<!-- Attach screenshots or a short video demonstrating the change, where
appropriate. Remove this section if it is not relevant to your PR. -->

## Agent Mode
- [ ] Warp Agent Mode - This PR was created via Warp's AI Agent Mode

<!--
## Changelog Entries for Stable

The entries below will be used when constructing a soft-copy of the
stable release changelog. Leave blank or remove the lines if no entry in
the stable changelog is needed. Entries should be on the same line,
without the `{{` `}}` brackets. You can use multiple lines, even of the
same type. The valid suffixes are:

- NEW-FEATURE: for new, relatively sizable features. Features listed
here will likely have docs / social media posts / marketing launches
associated with them, so use sparingly.
- IMPROVEMENT: for new functionality of existing features.
- BUG-FIX: for fixes related to known bugs or regressions.
- IMAGE: the image specified by the URL (hosted on GCP) will be added to
Dev & Preview releases. For Stable releases, see the pinned doc in the
#release Slack channel.
- OZ: Oz-related updates. Use `CHANGELOG-OZ`. At most 4 Oz updates are
shown in-app per release.
- NONE: Explicitly opt out of changelog inclusion. Use `CHANGELOG-NONE`
for PRs that should never appear in the changelog (e.g. refactors,
internal tooling, CI changes). This prevents the changelog agent from
inferring an entry.

CHANGELOG-NEW-FEATURE: {{text goes here...}}
CHANGELOG-IMPROVEMENT: {{text goes here...}}
CHANGELOG-BUG-FIX: {{text goes here...}}
CHANGELOG-BUG-FIX: {{more text goes here...}}
CHANGELOG-IMAGE: {{GCP-hosted URL goes here...}}
CHANGELOG-OZ: {{text goes here...}}
CHANGELOG-NONE
-->

Co-authored-by: Oz <oz-agent@warp.dev>

Author: dagmfactory

app/Cargo.toml

@@ -649,6 +649,7 @@ default = [
     "handoff_cloud_cloud",
     "remote_codebase_indexing",
     "solo_user_byok",
+    "custom_inference_endpoints",
     "billing_and_usage_page_v2",
 ]
 # Enable this feature to automatically perform heap profiling.  NOTE: This will
@@ -951,6 +952,7 @@ hoa_notifications = []
 open_code_notifications = []
 transfer_control_tool = []
 skip_firebase_anonymous_user = []
+custom_inference_endpoints = []
 solo_user_byok = []
 billing_and_usage_page_v2 = []
 configurable_toolbar = []

app/src/features.rs

@@ -489,6 +489,8 @@ fn enabled_features() -> HashSet<FeatureFlag> {
         FeatureFlag::GitCredentialRefresh,
         #[cfg(feature = "remote_code_review")]
         FeatureFlag::RemoteCodeReview,
+        #[cfg(feature = "custom_inference_endpoints")]
+        FeatureFlag::CustomInferenceEndpoints,
     ]);
 
     flags

crates/warp_features/src/lib.rs

@@ -940,7 +940,6 @@ pub const DOGFOOD_FLAGS: &[FeatureFlag] = &[
     #[cfg(not(windows))]
     FeatureFlag::SshRemoteServer,
     FeatureFlag::DragTabsToWindows,
-    FeatureFlag::CustomInferenceEndpoints,
     FeatureFlag::RemoteCodebaseIndexing,
     FeatureFlag::RemoteCodeReview,
 ];