PR_26175_ALFA_008-game-hub-feature-matrix

[ToolboxAid]

Summary

• Replaced the stale BUILD source of truth with ALFA_008.
• Added a report-only Game Hub feature matrix with source and Playwright evidence for the current workflow.
• Added ALFA_008 validation lane, requirements checklist, changed-files report, review diff, and repo-structured delta ZIP artifact.

Scope

• No product UI/source behavior changes.
• No API/service/repository contract changes.
• No shared toolbox status bar changes.

Validation

• PASS: npx playwright test tests/playwright/tools/GameHubMockRepository.spec.mjs --workers=1 (14 passed, 0 failed)
• PASS: rg -n "<[s]tyle|[s]tyle=" docs_build/dev/BUILD_PR.md docs_build/dev/reports/PR_26175_ALFA_008-game-hub-feature-matrix_report.md docs_build/dev/reports/PR_26175_ALFA_008-game-hub-feature-matrix_validation-lane.md docs_build/dev/reports/PR_26175_ALFA_008-game-hub-feature-matrix_requirements-checklist.md (no matches)

Artifact

• tmp/PR_26175_ALFA_008-game-hub-feature-matrix_delta.zip