Narrow the sunglasses and fix portrait-type parsing

Move the hinges to +/-0.075 (0.035 box), arms to +/-0.098, and lenses to a
0.024 m radius while keeping the lens plane in front of the eyes. Rebuild the
GLB and AO; fit now measures 0.202 m total width (0.64x head). capture_realism
now parses the documented --portrait-type option instead of ignoring it.
Python tooling 87/87; headless 228/228.

tools/blender_assets.py

@@ -970,12 +970,15 @@ def build_gear(name):
     elif name == "hood":
         p.append(_hood("Hood", M("plastic_grey"), (0, 0, 0.015)))
     elif name == "sunglasses":
+        # Keep the front frame narrow enough to sit inside the 0.315 m head
+        # silhouette. The arms/hinges set the overall width, so pull those in
+        # before shrinking the lenses; the lens plane stays in front of the eyes.
         for s in (-1.0, 1.0):
-            p.append(cyl("Lens", 0.03, 0.03, 0.008, (0.05 * s, -0.152, 0.035), M("lens"),
+            p.append(cyl("Lens", 0.024, 0.024, 0.008, (0.04 * s, -0.152, 0.035), M("lens"),
                          seg=14, rot=(math.radians(90), 0, 0), scale=(1.25, 1.0, 1.0)))
-            p.append(box("Hinge", (0.06, 0.008, 0.01), (0.11 * s, -0.150, 0.045),
+            p.append(box("Hinge", (0.035, 0.008, 0.01), (0.075 * s, -0.150, 0.045),
                          M("plastic_black")))
-            p.append(box("Arm", (0.006, 0.15, 0.008), (0.138 * s, -0.078, 0.042),
+            p.append(box("Arm", (0.006, 0.15, 0.008), (0.098 * s, -0.078, 0.042),
                          M("plastic_black")))
         p.append(box("Bridge", (0.04, 0.006, 0.008), (0, -0.155, 0.045), M("plastic_black")))
     elif name == "firefighter_helmet":