Approve Wu river infantry handpainted sprite v2

docs/unit-sprite-wu-infantry-river-v2-approval-packet.md

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+# Wu River Infantry v2 Approval Packet
+
+- status: approved during continuous production run
+- unit: `unit-wu-infantry-river`
+- source art: `handpaint-batch4-wu-infantry-river-source-v2.png`
+- contact sheet: `handpaint-batch4-wu-infantry-river-v2-contact.png`
+- animation GIF: `handpaint-batch4-wu-infantry-river-v2-animation.gif`
+- before/after: `handpaint-batch4-wu-infantry-river-v2-before-after.png`
+- scale compare: `handpaint-batch4-wu-infantry-river-v2-scale-compare.png`
+- battle composite: `handpaint-batch4-wu-infantry-river-v2-battle-composite.png`
+- browser check: `handpaint-batch4-wu-infantry-river-v2-debug-preview-battle-check.png`
+- current board: `unit-sprite-current-approval-board.png`
+- debug URL: `http://127.0.0.1:4173/heros_web/?debug&debugSpritePreview=unit-wu-infantry-river&v=wu-infantry-river-v2`
+
+## Visual Decision
+
+Approved for the continuous batch run. v2 keeps the Wu red and teal palette but reads as a lighter riverbank infantry skirmisher through the lower headband silhouette, smaller shield, and compact dao stance. It stays visually separate from the heavier Wu marine infantry and cavalry units.
+
+## Technical Checks
+
+- base status: ok
+- action status: ok
+- 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
+- battle scale from sample gate: 27.5..33.1 x 45.7..45.7
+- local build: passed
+- Local browser console errors: `0`
+- Local browser 404s: `0`
+
+## Notes
+
+v1 was discarded because long weapon poses reduced the body scale in several frames. v2 keeps the weapon compact, stabilizes idle/walk height, and remains readable without external bases, rings, or badges.