Refactor and enhance zone and wall item management:

- Update zone handling in ZoneGroup to include selected zone visibility.
- Improve camera transition speed in ZoneCentreTarget.
- Add clearSelectedZone functionality in useZoneStore.
- Integrate clearSelectedZone in KeyPressListener for ESCAPE key action.
- Adjust sidebar and module toggle positioning for better UI layout.
- Clean up unused code and comments in Project component.

app/src/styles/layout/sidebar.scss

@@ -4,7 +4,7 @@
 .sidebar-left-wrapper {
   width: 270px;
   position: fixed;
-  top: 32px;
+  top: 22px;
   left: 8px;
   background: var(--background-color);
   backdrop-filter: blur(20px);
@@ -280,7 +280,7 @@
 .sidebar-right-wrapper {
   width: 320px;
   position: fixed;
-  top: 32px;
+  top: 22px;
   right: 8px;
   background: var(--background-color);
   backdrop-filter: blur(20px);