Fix modelling regressions and reconcile WIP UI work

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

@@ -87,6 +87,70 @@
    }
   }
  },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "parameters.change",
+   "params": {
+    "name": "wall",
+    "expression": "2.4 mm"
+   }
+  }
+ },
+ {
+  "expect": {
+   "errors": 0,
+   "bodies": 2
+  }
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "parameters.change",
+   "params": {
+    "name": "height",
+    "expression": "30 mm"
+   }
+  }
+ },
+ {
+  "expect": {
+   "errors": 0,
+   "bodies": 2
+  }
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "parameters.change",
+   "params": {
+    "name": "height",
+    "expression": "25 mm"
+   }
+  }
+ },
+ {
+  "expect": {
+   "errors": 0,
+   "bodies": 2
+  }
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "parameters.change",
+   "params": {
+    "name": "wall",
+    "expression": "2 mm"
+   }
+  }
+ },
+ {
+  "expect": {
+   "errors": 0,
+   "bodies": 2
+  }
+ },
  {
   "call": "engine.execute",
   "params": {