Add AWS Bedrock region selection support

[keyuchen21]

Summary

Closes #8506

Adds first-class AWS Bedrock region selection support. Users can now configure their preferred AWS region (e.g. us-east-1, eu-west-1) directly in Warp's AI settings, enabling Bedrock inference in any supported region.

Changes

• crates/ai/src/aws_credentials.rs — Added region field to AwsCredentials struct, fixed proto conversion (was hardcoding empty string), enhanced status card to display active region
• crates/ai/src/aws_credentials_tests.rs — New test file: 9 unit tests covering region storage, proto conversion, and UI display
• crates/ai/src/api_keys_tests.rs — Added tests for AWS credentials in API key request flow
• app/src/settings/ai.rs — Added aws_bedrock_region setting with TOML persistence and cloud sync
• app/src/ai/aws_credentials.rs — Updated load_aws_credentials_from_sdk() to accept region override, resolves from SDK when not set, subscribes to region setting changes
• app/src/settings_view/ai_page.rs — Added "AWS Region" text input to the Bedrock settings widget

How to use

1. Open Settings → AI (or press Cmd+,)
2. Scroll down to AWS Bedrock section (or search "bedrock")
3. Enable the "Use AWS Bedrock credentials" toggle
4. Set your AWS Profile (optional, leave blank for default)
5. Set your AWS Region (e.g. us-east-1, us-west-2, eu-west-1) — if left blank, the region is automatically resolved from your ~/.aws/config or AWS_REGION environment variable
6. Configure a Login Command (e.g. aws sso login) for credential refresh
7. Click Refresh to load credentials

Once loaded, the status card shows: "Credentials loaded · Region: us-east-1"

Region resolution priority:

1. Explicit value in the "AWS Region" field (highest priority)
2. AWS_REGION or AWS_DEFAULT_REGION environment variable
3. Region from ~/.aws/config for the configured profile

Test plan

• Unit tests pass: cargo nextest run -p ai (37 tests)
• Clippy clean on affected crates
• Manual: AWS Bedrock section renders with new Region input field
• Manual: Region field disabled when Bedrock toggle is off, enabled when on
• Manual: Set region, verify credentials load with correct region shown in status
• Manual: Leave region blank, verify SDK resolves from ~/.aws/config

CHANGELOG-NEW-FEATURE: Added AWS region selection to Bedrock settings for choosing inference region

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: kc4020.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[oz-for-oss]

@keyuchen21

This PR is not linked to an issue that is marked with ready-to-implement.

Issue-state enforcement details:

• Associated same-repo issues checked: Support AWS Bedrock (Claude) as a first-class AI provider #8506

• Required readiness label: ready-to-implement

Readiness check:

• Support AWS Bedrock (Claude) as a first-class AI provider #8506: missing ready-to-implement; readiness labels present: none

To continue, link this PR to a same-repo issue such as Closes #123 in the PR description, and make sure that issue has ready-to-implement.

Powered by Oz

[oz-for-oss]

@keyuchen21

This PR is not linked to an issue that is marked with ready-to-implement.

Issue-state enforcement details:

• Associated same-repo issues checked: #8506

• Required readiness label: ready-to-implement

Readiness check:

• #8506: missing ready-to-implement; readiness labels present: none

To continue, link this PR to a same-repo issue such as Closes #123 in the PR description, and make sure that issue has ready-to-implement.

Powered by Oz

[cla-bot]

Thank you for your pull request and welcome to our community. We require contributors to sign our Contributor License Agreement, and we don't seem to have the users @keyuchen21 on file. In order for us to review and merge your code, each contributor must visit https://cla.warp.dev to read and agree to our CLA. Once you have done so, please comment @cla-bot check to trigger another check.

[keyuchen21]

recheck

[keyuchen21]

@cla-bot check

[cla-bot]

Thank you for your pull request and welcome to our community. We require contributors to sign our Contributor License Agreement, and we don't seem to have the users @keyuchen21 on file. In order for us to review and merge your code, each contributor must visit https://cla.warp.dev to read and agree to our CLA. Once you have done so, please comment @cla-bot check to trigger another check.

[cla-bot]

The cla-bot has been summoned, and re-checked this pull request!

[keyuchen21]

@cla-bot check

[cla-bot]

The cla-bot has been summoned, and re-checked this pull request!

[keyuchen21]

Screenshot

Here is the AWS Bedrock settings section with the new AWS Region field:

Note: Fields are disabled because the 'Use AWS Bedrock credentials' toggle is off (requires workspace admin enablement). When enabled, all fields become interactive.

[woodcockjosh]

Watching

[github-actions]

Hi @keyuchen21 — a reviewer requested changes on this PR and it hasn't had activity from you in 11 days. When you get a chance, please push updates or reply to the review so a reviewer can take another look. Without activity, this PR will be automatically closed after 30 days of inactivity.

[keyuchen21]

"the ready-to-implement label on issue #8506" — that requires a Warp maintainer to add.