Round the NPC shoes and responder boots

TODO.md

@@ -131,8 +131,9 @@ and equipment fit.
       sheet `sheet_npc_hands_grip_compare.jpg` and regression assertions.)
 - [ ] Add finger curl/thumb contact for the hand items and judge the umbrella/sign grips against the
       new palm/finger geometry.
-- [ ] Audit shoes/boots for silhouette, grounding and contact with the floor; preserve the
-      responder and firefighter footwear language.
+- [x] Audit shoes/boots for silhouette, grounding and contact with the floor; preserve the
+      responder and firefighter footwear language. (Rounded toe/heel caps; boots keep the black
+      rubber language; all eight rebuilt, grounding and proportions still pass.)
 - [ ] Improve clothing layer transitions at collars, cuffs, plackets, waistbands, pockets, badges
       and reflective bands; remove obvious z-fighting or floating detail.
 - [ ] Add believable fabric folds/wrinkles at elbows, knees, waist and hems where the extra