Approve Shu infantry handpainted sprite v8

docs/unit-sprite-art-quality-gate.md

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+# Unit Sprite Art Quality Gate
+
+This file is generated by `scripts/check-unit-sprite-art-quality.py`.
+
+This gate catches obvious sprite-art failures before user approval. It does not replace manual visual approval.
+
+- Manifest: `docs/unit-sprite-rework-manifest.json`
+- Audit: `docs/unit-sprite-rework-audit.json`
+- Approved baseline units: 7
+- Pending approval units: 0
+- Queued rework units: 84
+
+## Checked Rules
+
+- Required approval artifacts exist, including contact sheet, GIF, scale comparison, battle preview, and current approval board.
+- Base/action sheets have no partial alpha, border hits, or empty frames.
+- 50px battle-scale silhouette is not too small or too tall.
+- Idle/walk base frames stay vertically stable.
+- Approval packet points at the current approval board and browser debug preview evidence.
+
+## none
+
+Status: OK
+
+Evidence:
+- no pending approval units: nothing to check
+
+## Result
+
+OK