Fix Bench assembly step formatting

[Romonaga]

Change Type

• Feature
• Bug fix
• Refactor
• Documentation / workflow artifact
• Repo organization / cleanup
• Other: ___

Linked Workstream Change

• Linked Verlyn change: circuit-shelf-30
• No change applies - reason: ___

Verlyn PR Metadata

Verlyn PR creator: ___

Acceptance Criteria

• Assembly checklist step checkbox, ordinal, title, and instruction no longer overlap or crowd each other in dark bench mode.
• Each assembly step can be expanded or collapsed independently, with the first incomplete step open by default.
• Bench plan detail text remains readable in dark mode on desktop and mobile viewports.

Verification Runs Completed

• Session baseline
• Architecture check (if configured)
• Workstream validation: python scripts/repo_helpers/workflow/validate.py <id> --strict
• Other:
  • ___

Coverage Summary

• 8 of 8 tracked work items are complete.

AI Assistance Disclosure

• AI-assisted - tool(s) used: Codex
• Human-authored only

Accountable human owner: hellweek

Seeded by Verlyn for Fix Bench assembly step formatting: this tracked change is being managed through Verlyn's solo workflow path. Replace this note with the concrete AI-assisted tools and scope before merge if implementation, review, or packet authoring used AI, or replace it with 'Human-authored only.' when no AI assistance materially shaped the final change.

Independent Cross-Agent Review

• Not required for this change - reason: ___
• Completed - reviewer tool: Verlyn workflow gate | findings summary: No blocking findings recorded.
  • Unresolved findings:
    • ___

Rollback Plan

• Revert the bugfix for Fix Bench assembly step formatting if the targeted regression returns or new regressions appear.

Handoff Status

• All acceptance criteria satisfied
• Verlyn-managed work items updated
• Outstanding blockers or deferred items noted
• Ready to merge