Approve Sima Yi handpainted sprite v2

docs/unit-sprite-sima-yi-v2-approval-packet.md

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+# Sima Yi hand-painted v2 approval packet
+
+- unit: `unit-sima-yi`
+- candidate: `handpaint-batch7-sima-yi-v2`
+- source: `docs/handpaint-batch7-sima-yi-source-v1.png`
+- contact sheet: `docs/handpaint-batch7-sima-yi-v2-contact.png`
+- animation: `docs/handpaint-batch7-sima-yi-v2-animation.gif`
+- before/after: `docs/handpaint-batch7-sima-yi-v2-before-after.png`
+- battle composite: `docs/handpaint-batch7-sima-yi-v2-battle-composite.png`
+- current approval board: `docs/unit-sprite-current-approval-board.png`
+- browser check: `docs/handpaint-batch7-sima-yi-v2-debug-preview-battle-check.png`
+
+## Result
+
+- Local build: `pnpm build` passed.
+- Local browser URL: `http://127.0.0.1:4173/heros_web/?debug&debugSpritePreview=unit-sima-yi&v=sima-yi-v2`
+- Local browser console errors: `0`
+- Local browser 404s: `0`
+- Sample gate: passed.
+
+## Sprite safety
+
+- base partial alpha: 0
+- action partial alpha: 0
+- base frame border hits: 0
+- action frame border hits: 0
+- base battle size: 31.3..33.5 x 46.0..46.0
+- frame bbox width: 196..210 base, 180..267 action
+- frame bbox height: 288 base, 286..290 action
+
+## Visual notes
+
+- v1 had solid art direction but failed the art gate because its battle-scale width stayed below 32px.
+- v2 widens the robe silhouette while preserving the cold Wei strategist read and frame safety.
+- Midnight-blue robe, silver trim, official cap, and iron fan/document distinguish Sima Yi from Pang Tong and Ma Liang at 50px scale.