feat(ujust): wire flutter devcontainer recipe import

[castrojo]

This adds the scaffolding for the antigravity/flutter just. I am testing that live on dakota before PRing it here but this can land now.

Agent Notes:

Adds an optional import for flutter.just so that Dakota systems shipping /usr/share/ublue-os/just/flutter.just automatically expose ujust install-flutter to end users.

Uses import? so non-Dakota Bluefin variants are unaffected.

Assisted-by: Claude via pi

Summary by CodeRabbit

• Chores
  • Added conditional support for Flutter-related build tasks, making Flutter functionality available within the system's build and configuration framework.

Refs #356common

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR adds a single optional import line for flutter.just to the entry point justfile configuration, positioning it in the conditional imports section between the required update.just and optional custom.just imports. No other logic or files are modified.

Changes

Flutter Integration

Layer / File(s)	Summary
Optional Flutter.just import system_files/bluefin/usr/share/ublue-os/just/00-entry.just	Adds import? "/usr/share/ublue-os/just/flutter.just" as an optional import in the entry point justfile, positioned between update.just and custom.just imports.

Estimated Code Review Effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A flutter of wings, so light and bright,
One line added to make things right,
The build system now spreads its wings—
Flutter tasks among the things! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'feat(ujust): wire flutter devcontainer recipe import' accurately describes the main change: adding an optional import for flutter.just to the ujust entry point file.
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.
Description check	✅ Passed	The PR description clearly explains the purpose, implementation details, and testing status. It follows the repository template guidance by placing changes in the Bluefin folder and notes relevant considerations.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[hanthor]

Approved.

[castrojo]

🤖 Copilot Test Report

Branch: upstream-pr/flutter-devcontainer | 6 commits behind main | Tested: 2026-05-30T04:51Z

Test Results

Test	Result
just check (syntax validation)	✅ PASS
Branch freshness	✅ Near head

Notes

Wires Flutter devcontainer recipe import to apps.just. Straightforward import line addition.

[castrojo]

🔔 Needs 2 approvals from maintainers to enter the merge queue (can't self-approve). Both conflict issues have been resolved via rebase — branch is clean and just check passes.