Approve Yan Yan handpainted sprite v2

docs/unit-sprite-yan-yan-v2-approval-packet.md

@@ -0,0 +1,35 @@
+# Yan Yan hand-painted v2 approval packet
+
+- unit: `unit-yan-yan`
+- candidate: `handpaint-batch7-yan-yan-v2`
+- source: `docs/handpaint-batch7-yan-yan-source-v1.png`
+- contact sheet: `docs/handpaint-batch7-yan-yan-v2-contact.png`
+- animation: `docs/handpaint-batch7-yan-yan-v2-animation.gif`
+- before/after: `docs/handpaint-batch7-yan-yan-v2-before-after.png`
+- battle composite: `docs/handpaint-batch7-yan-yan-v2-battle-composite.png`
+- current approval board: `docs/unit-sprite-current-approval-board.png`
+- browser check: `docs/handpaint-batch7-yan-yan-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-yan-yan&v=yan-yan-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: 30.4..37.5 x 45.7..46.0
+- frame bbox width: 190..235 base, 170..242 action
+- frame bbox height: 286..288 base, 271..295 action
+
+## Visual notes
+
+- v1 had good idle readability but over-shrunk the action frames below the archer width threshold.
+- v2 restores bow-shot width while preserving frame safety and the burgundy elder fortress defender silhouette.
+- Yan Yan remains distinct from Huang Zhong through deeper red armor, gray beard, cloak mass, and a more defensive castle-guard stance.