Approve Wu cavalry handpainted sprite v2

docs/unit-sprite-wu-cavalry-v2-approval-packet.md

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+# Wu Cavalry v2 Approval Packet
+
+- unit: `unit-wu-cavalry`
+- version: `v2`
+- source: `docs/handpaint-batch4-wu-cavalry-source-v1.png`
+- contact sheet: `docs/handpaint-batch4-wu-cavalry-v2-contact.png`
+- animation: `docs/handpaint-batch4-wu-cavalry-v2-animation.gif`
+- battle preview: `docs/handpaint-batch4-wu-cavalry-v2-debug-preview-battle-check.png`
+- before/after: `docs/handpaint-batch4-wu-cavalry-v2-before-after.png`
+- scale compare: `docs/handpaint-batch4-wu-cavalry-v2-scale-compare.png`
+- current approval board: `docs/unit-sprite-current-approval-board.png`
+
+## Visual Decision
+
+Approved for the continuous production run.
+
+- 50px battle readability: pass
+- Wu faction color separation: pass
+- horse/rider cavalry silhouette: pass
+- avoids infantry, archer, strategist, or unique-hero read: pass
+- opaque unit body: pass
+- frame boundary safety: pass
+- idle/action scale stability: pass
+
+## Technical Checks
+
+- local browser URL: `http://127.0.0.1:4173/heros_web/?debug&debugSpritePreview=unit-wu-cavalry&v=wu-cavalry-v2-final`
+- Local browser console errors: `0`
+- base partial alpha: `0`
+- action partial alpha: `0`
+- base frame border hits: `0`
+- action frame border hits: `0`
+- base empty frames: `0`
+- action empty frames: `0`
+- base bbox width range: `177..252`
+- base bbox height range: `274..290`
+- base bottom range: `303..303`
+- action bbox width range: `177..261`
+- action bbox height range: `274..290`
+- action bottom range: `303..303`
+
+## Notes
+
+The v2 sheet raises the smaller mounted poses to stabilize battle-scale height while preserving a compact Wu horse-and-rider silhouette within the 313px frame.