# M54 Contract UI Migration

## Stopping point

Contract Choice uses the shared M52/M53 chibi hand-drawn UI language with measured modules and verified screenshots. Gameplay, Save, routing and domain services remain unchanged.

## Ordered steps

1. Extract responsive canvas and `ContractHeader`.
2. Extract `ContractBoard` and difficulty choice slots.
3. Extract `ContractPartySummary`, action dock and navigation.
4. Add the same SubViewport visual matrix for 760×360, 844×390 and 1280×720 in zh_CN/en.
5. Inspect static, dynamic and final renders; fix earliest failing boundary.

## Frozen scope

No new content, battle rules, economy, Save schema, audio, packaging or device release work.

## Acceptance

- Existing Contract View contract marker passes exactly once.
- All six locale/viewport combinations render without clipping or overlap.
- Every visible region has one owner: static master, runtime content or hit area.
- Focused commit is pushed before the next step.