BIM: Fix beam rotation when Base property is cleared (#24831)

When a profile-based beam had its Base property cleared and the model
was recomputed, the beam would rotate 90 degrees, changing its direction
completely.

Profile objects are always created in the XY plane with Width along X,
height along Y and normal along Z. However, if Base is cleared, fallback
code always used YZ plane orientation for beams. This resulted in a
different orientation during cleaned Base property.

Fix is to check if we are profile-based or not and if yes, use XY plane
orientation, while we don't have this property then just use YZ plane
orientation (preserving traditional horizontal behavior).

src/Mod/BIM/ArchStructure.py

@@ -1306,13 +1306,23 @@ class _Structure(ArchComponent.Component):
                                     # TODO use Part.Shape() rather than shape.copy() ... ?
                                     baseface = f.copy()
         elif length and width and height:
+            # check if this was a profil based arch structure
+            # profile-based structures should use XY plane orientation
+            use_profile_orientation = hasattr(obj, "Profile") and obj.Profile
+
             if (length > height) and (IfcType in ["Beam", "Column"]):
                 h2 = height / 2 or 0.5
                 w2 = width / 2 or 0.5
-                v1 = Vector(0, -w2, -h2)
-                v4 = Vector(0, -w2, h2)
-                v3 = Vector(0, w2, h2)
-                v2 = Vector(0, w2, -h2)
+                if use_profile_orientation:
+                    v1 = Vector(-w2, -h2, 0)
+                    v2 = Vector(w2, -h2, 0)
+                    v3 = Vector(w2, h2, 0)
+                    v4 = Vector(-w2, h2, 0)
+                else:
+                    v1 = Vector(0, -w2, -h2)
+                    v2 = Vector(0, w2, -h2)
+                    v3 = Vector(0, w2, h2)
+                    v4 = Vector(0, -w2, h2)
             else:
                 l2 = length / 2 or 0.5
                 w2 = width / 2 or 0.5