diff --git a/app/src/main/java/com/grigowashere/loratester/ui/MapFragment.java b/app/src/main/java/com/grigowashere/loratester/ui/MapFragment.java
index 520f552..671e900 100644
--- a/app/src/main/java/com/grigowashere/loratester/ui/MapFragment.java
+++ b/app/src/main/java/com/grigowashere/loratester/ui/MapFragment.java
@@ -143,6 +143,7 @@ public class MapFragment extends Fragment {
     private Bitmap bitmapHill;
     private Marker hillMarker;
     private Polyline hillPathLine;
+    private boolean hillActive;
     private ElevationHeatmapLayer heatmapLayer;
     private boolean heatmapActive;
     private int heatmapRadiusM = 100;
@@ -204,7 +205,7 @@ public class MapFragment extends Fragment {
         setupCenterModeToggle();
 
         if (btnFindHill != null) {
-            btnFindHill.setOnClickListener(v -> findNearestHill());
+            btnFindHill.setOnClickListener(v -> toggleHill());
         }
         setupHeatmapUi();
 
@@ -879,6 +880,27 @@ public class MapFragment extends Fragment {
         return null;
     }
 
+    private void toggleHill() {
+        if (hillActive) {
+            deactivateHill();
+            return;
+        }
+        findNearestHill();
+    }
+
+    private void deactivateHill() {
+        hillActive = false;
+        if (btnFindHill != null) {
+            btnFindHill.setActivated(false);
+            btnFindHill.setEnabled(true);
+        }
+        clearHillLayers();
+        if (mapHillStatus != null) {
+            mapHillStatus.setVisibility(View.GONE);
+        }
+        requestMapInvalidate();
+    }
+
     private void findNearestHill() {
         if (uploader == null || !isAdded()) {
             return;
@@ -918,6 +940,10 @@ public class MapFragment extends Fragment {
                         }
                         return;
                     }
+                    hillActive = true;
+                    if (btnFindHill != null) {
+                        btnFindHill.setActivated(true);
+                    }
                     showHillOnMap(lat, lon, result);
                 });
             } catch (Exception e) {
@@ -1293,17 +1319,12 @@ public class MapFragment extends Fragment {
     }
 
     private boolean centerOnSelf() {
-        if (uploader == null) {
+        LatLong self = resolveSelfPosition();
+        if (self == null) {
             return false;
         }
-        String myId = uploader.getDeviceId();
-        for (DeviceInfo d : lastDevices) {
-            if (myId.equals(d.device_id) && GeoUtils.isValidCoordinate(d.lat, d.lon)) {
-                centerOnPoint(new LatLong(d.lat, d.lon), (byte) 14);
-                return true;
-            }
-        }
-        return false;
+        centerOnPoint(self, (byte) 14);
+        return true;
     }
 
     private boolean centerOnRole(String role) {
diff --git a/server/fastapi_app.py b/server/fastapi_app.py
index 596226c..ff731fb 100644
--- a/server/fastapi_app.py
+++ b/server/fastapi_app.py
@@ -7,6 +7,7 @@ from typing import Any, Optional
 from fastapi import FastAPI, Header, HTTPException, Query
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import FileResponse
+from fastapi.staticfiles import StaticFiles
 from pydantic import BaseModel, Field
 
 from core.auth import ANDROID_CLIENT_HEADER, ANDROID_CLIENT_VALUE
@@ -370,6 +371,9 @@ def health():
     }
 
 
+app.mount("/static", StaticFiles(directory=STATIC_DIR), name="static")
+
+
 if __name__ == "__main__":
     import uvicorn
 
diff --git a/server/static/index.html b/server/static/index.html
index fc5fb31..775d9cd 100644
--- a/server/static/index.html
+++ b/server/static/index.html
@@ -321,6 +321,18 @@
   </div>
   <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
   <script src="/static/radio-ui.js"></script>
+  <script>
+    if (typeof RadioUI === 'undefined') {
+      console.error('radio-ui.js not loaded — check /static/radio-ui.js');
+      window.RadioUI = {
+        roleLabel: (role) => role || '—',
+        parseRadioSnapshot: () => ({}),
+        diffSnapshots: () => new Set(),
+        formatRadioPanel: () => '—',
+        renderCompareGrid: () => '—'
+      };
+    }
+  </script>
   <script>
     const map = L.map('map').setView([55.75, 37.62], 10);
     L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {