fix v1.33.3: icon picker shows the auto icon when none set

- marker dialog stores autoIcon (DevItem.icon); ha-icon-picker gets it
  as placeholder, fallback input too; 'Auto: mdi:...' hint with preview
  under the picker, hidden once an explicit icon is chosen
- smoke_icon_placeholder.mjs; 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": "1.33.2"
+  "version": "1.33.3"
 }