[LaPaGaYo]

Summary

• Add the project readiness command center projection, overview UI, action list, and readiness search API/UI.
• Polish readiness/engineering empty states, no-result states, and no-repository setup state.
• Finalize Phase 8 product/docs context and targeted regression coverage for readiness search scope.

Test Plan

• npm test
• npm run lint
• npm run typecheck
• npm run build

Next Scope

• Phase 9 Task 1 will add worker-side GitHub App installation token lifecycle. GitHub App install/authorization UI remains a later task.