Add a gear-vs-body fit report to the Blender asset tool

`blender_assets.py fit` measures each character head width (skin vertices
weighted to Head in y 1.55-1.81) and clothing radius (cloth skirt in y 0.30-0.52,
pants hip fallback), then prints every attached head/back/chest gear bounding box
with head-band status and x/radial skirt clearance. The report confirms the
glasses width and shoulder-bag coat clip, giving the next fit fixes numbers.
Python tooling 87/87; asset audit clean.

tools/test_blender_assets.py

@@ -45,6 +45,25 @@ class BuiltAssetTests(unittest.TestCase):
                 bad[name] = result["issues"]
         self.assertEqual(bad, {})
 
+    def test_fit_report_measures_gear_against_body(self):
+        report = {entry["character"]: entry for entry in ba.fit_report()}
+        self.assertIn("npc_coat", report)
+        coat = report["npc_coat"]
+        self.assertAlmostEqual(coat["reference"]["head_width"], 0.315, places=2)
+        self.assertAlmostEqual(coat["reference"]["clothing_radius"], 0.225, places=3)
+        sunglasses = next(row for row in coat["gear"] if row["name"] == "sunglasses")
+        self.assertEqual(sunglasses["attach"], "head")
+        self.assertLess(sunglasses["width"], coat["reference"]["head_width"])
+        bag = next(row for row in coat["gear"] if row["name"] == "shoulder_bag")
+        self.assertEqual(bag["attach"], "back")
+        self.assertGreaterEqual(bag["x_extent"], 0.2)
+        for character in report.values():
+            for row in character["gear"]:
+                self.assertEqual(len(row["min"]), 3)
+                self.assertEqual(len(row["max"]), 3)
+        self.assertIn("npc_dress", report)
+        self.assertAlmostEqual(report["npc_dress"]["reference"]["clothing_radius"], 0.26, places=3)
+
     def test_manifest_covers_catalogue(self):
         manifest = json.loads(ba.MANIFEST.read_text(encoding="utf-8"))
         self.assertEqual(set(manifest["assets"]), {n for _, n in ba.catalogue()})