feat: Add persistent localStorage for Kabelstrecken (polylines) visibility

- Add kabelstreckenVisible state with localStorage persistence
- Implement dual localStorage variables (kabelstreckenVisible + polylineVisible) for compatibility
- Add event system for cross-component polyline visibility updates
- Update MapComponent to listen for polylineVisibilityChanged events
- Ensure polylines display correctly on browser reload
- Migrate from Redux-only state to localStorage-first approach
- Add comprehensive debug logging for troubleshooting

Fixes issue where Kabelstrecken checkbox state was lost on page reload
and polylines were not displayed until manual toggle.

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "nodemap",
-  "version": "1.1.302",
+  "version": "1.1.303",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "nodemap",
-      "version": "1.1.302",
+      "version": "1.1.303",
       "dependencies": {
         "@emotion/react": "^11.13.3",
         "@emotion/styled": "^11.13.0",