Add inline group editing for lineup templates

[acwilan]

Summary

• list groups on lineup template via new endpoint
• expose groups endpoint in URL rules
• allow frontend to manage template groups
• add new page for editing template groups
• link groups page from lineup templates list

Testing

• yarn check
• yarn build
• composer install (fails: command not found)
• vendor/bin/phpunit --configuration phpunit.xml --coverage-clover coverage.xml (fails: command not found)

---

https://chatgpt.com/codex/tasks/task_e_6849d439c4a483308c81321060049c96

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ	Complexity Δ
backend/controllers/LineupTemplateController.php	20.63% <100.00%> (+11.54%)	15.00 <2.00> (+2.00)

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[windsurf-bot]

💡 To request another review, post a new comment with "/windsurf-review".