bump build number to 6

[h3nock]

Summary

Bumps the TestFlight build number from 4 to 6 for the release containing the compose bar with voice support (#23), active session switching (#21), SSH public key installation from connection setup (#8), ssh-rsa host key support (#9), and the server name capitalization fix (#16).

Build 5 was archived and uploaded but never distributed — #8 merged shortly after, so it was skipped in favour of a single build carrying everything. App Store Connect will not accept a replacement binary under a consumed build number, hence 4 → 6.

Testing

• CI green on the base commit (9aaa6d6)
• Release archive + export succeed, including the Verify GhosttyKit release mode gate (ReleaseFast confirmed by running the script directly, since xcodebuild swallows its stdout)
• Shipped bundle verified from the exported .ipa: CFBundleVersion 6, UIDeviceFamily [1], microphone and speech-recognition usage strings present, and install_authorized_key.sh present in Payload/Remux.app/ so Install SSH public keys on hosts from connection setup #8's installer has its script at runtime
• Built with stable Xcode 26.4.1 / iOS 26.4 SDK

The bump itself is a 3-line version change; no test suite was run against it locally.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated the iOS app’s build version from 4 to 6 for Debug and Release builds.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: c5cee2e8-02c2-40cd-a6b7-a716d892a131

📥 Commits

Reviewing files that changed from the base of the PR and between 9aaa6d6 and 1076ebd.

📒 Files selected for processing (2)

• Remux.xcodeproj/project.pbxproj
• project.yml

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📝 Walkthrough

Walkthrough

The project build version changes from 4 to 6 in project.yml and the Debug and Release Xcode build configurations.

Changes

Build version update

Layer / File(s)	Summary
Synchronize build version project.yml, Remux.xcodeproj/project.pbxproj	The project configuration and Debug and Release build settings update CURRENT_PROJECT_VERSION from 4 to 6.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• h3nock/remux#18: Updates CURRENT_PROJECT_VERSION in the same project files.

Suggested reviewers: obra

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: increasing the project build number from 4 to 6.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch agent/bump-build-6

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Latest commit:	1076ebd
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