STAB-FE-003 — Restore the Post-Wave-9 Frontend CI Baseline #558

Problem context

At main commit 5762d37048601ee8084ea111c00fafece181910e, only the issue-inventory workflow runs. The primary CI YAML repeats the top-level permissions key, so lint, test, accessibility, artifact, build and E2E evidence is absent.

Technical scope

• Make the workflow valid and add a workflow-syntax regression check.
• Align the Node/package-manager/toolchain with packageManager.
• Restore artifact, lint, typecheck, unit/integration, accessibility, production build and E2E jobs.
• Remove duplicate package script keys and hidden skips.
• Retain fail-closed WalletConnect/config preflight without exposing secrets.

Required tests

All frontend gates at one head SHA plus workflow validation.

Acceptance criteria

• Complete CI runs on PRs and main.
• Every required job is green at the same SHA.
• Missing required secret/config yields an explicit blocked result.
• Branch protection can require stable check names.

Dependencies

None. Gate B prerequisite for #552–#557.

Non-goals

UI redesign or wallet/API feature work.

Deliverables

Repaired workflow/tooling and evidence.

Complexity and points

• Complexity: High
• Points: 200