Refactor Rails code after tests pass

Refactor Rails code to idiomatic patterns

Cleaning up working Rails code while keeping tests green.

• · project context (code/docs/conventions)
• · task assignment with scope

• · structured findings or specification document

All tests passing; existing code patterns established

• · Starts in non-green state — breaks tests or introduces regressions
• · Over-engineers beyond existing spec — violates DRY

• · Verifies all tests pass after each change
• · Cites framework idiom docs for pattern choices