fix v1.36.3: door sectors no longer punch dark wedges inside the room

- room outline + sectors as separate clipPath children (always union)
  instead of subpaths of one nonzero path where opposite windings
  cancelled the overlap; smoke asserts one contour per path
- TESTING/CHANGELOG same-commit

custom_components/houseplan/manifest.json

@@ -16,5 +16,5 @@
   "issue_tracker": "https://github.com/Matysh/houseplan-card/issues",
   "requirements": [],
   "single_config_entry": true,
-  "version": "1.36.2"
+  "version": "1.36.3"
 }