feat: stabilize face attachments and closed spline workflows

crates/ui-egui/tests/scenarios/face_wins_over_origin_plane.json

@@ -60,6 +60,18 @@
    ]
   }
  },
+ {
+  "note": "The shelled floor is picked rather than the origin plane. Its uncertified mesh face requires an explicit fixed-plane choice."
+ },
+ {
+  "expect": {
+   "sketching": false,
+   "dialog": "this face has no exact planar source"
+  }
+ },
+ {
+  "widget": "Use fixed plane"
+ },
  {
   "expect": {
    "sketching": true
@@ -78,4 +90,4 @@
    }
   }
  }
-]
+]

crates/ui-egui/tests/scenarios/s22_sheet_metal_fold.json

@@ -80,6 +80,28 @@
    ]
   }
  },
+ {
+  "note": "The sheet flange face is uncertified; choose the displayed fixed-plane option explicitly before drawing the fold line."
+ },
+ {
+  "expect": {
+   "sketching": false,
+   "dialog": "this face has no exact planar source"
+  }
+ },
+ {
+  "widget": "Use fixed plane"
+ },
+ {
+  "expect": {
+   "sketching": true,
+   "query": {
+    "command": "sketch.inspect",
+    "path": ["plane", "origin", 2],
+    "value": 2.5
+   }
+  }
+ },
  {
   "start": "sketch.line"
  },
@@ -149,4 +171,4 @@
    "file": "Untitled-Body1.dxf"
   }
  }
-]
+]