bonsai: catch kernel RuntimeError when finishing an arbitrary profile edit (#6259)

auto_detect_profiles() reconstructs an IfcIndexedPolyCurve from the edited
Blender mesh and calls ifcopenshell.geom.create_shape() on it to sort outer
boundaries from voids. Every other invalid-profile case in that function
(unclosed loops, malformed arcs or circles) returns a graceful (False, reason)
tuple, but this create_shape call had no exception handling at all. When the
reconstructed curve is geometrically valid topology but numerically
degenerate at the kernel's internal tolerance (confirmed live with a
weld-safe mesh whose coordinates land near that tolerance once converted to
project length units), create_shape raises RuntimeError, which propagated
straight through export_profile and crashed bim.edit_arbitrary_profile with
a raw traceback instead of the intended "INVALID PROFILE" popup.

Catch RuntimeError around the create_shape call and treat it the same as the
other invalid-profile branches, so a bad edit surfaces the existing friendly
error message instead of an unhandled crash.

Generated with the assistance of an AI coding tool.

src/bonsai/bonsai/tool/model.py

@@ -2450,7 +2450,15 @@ class Model(bonsai.core.tool.Model):
         # First convert to Shapely
         polygons = {}
         for curve in curves:
-            geometry = ifcopenshell.geom.create_shape(settings, curve)
+            try:
+                geometry = ifcopenshell.geom.create_shape(settings, curve)
+            except RuntimeError:
+                # The reconstructed curve can be geometrically degenerate (e.g. a
+                # sliver loop collapsed below the kernel's tolerance after an edit),
+                # which the geometry kernel rejects outright instead of returning an
+                # empty shape. Treat that the same as any other invalid profile
+                # instead of letting the exception crash the calling operator.
+                return (False, "INVALID_SHAPE")
             assert isinstance(geometry, W.Triangulation)
             v = ifcopenshell.util.shape.get_vertices(geometry, is_2d=True)
             v = np.round(v, 4)  # Round to nearest 0.1mm, otherwise things like circles don't polygonise reliably