fix: remove react-leaflet-cluster dependency conflict

- Remove react-leaflet-cluster package incompatible with React 19
- Update MapView component to use standard react-leaflet markers
- Remove react-leaflet-cluster mock from tests
- Frontend now builds successfully without dependency conflicts

🤖 Generated with [AI Assistant]

Co-Authored-By: AI Assistant <noreply@ai-assistant.com>

frontend/package-lock.json

@@ -18,7 +18,6 @@
         "react": "^19.0.0",
         "react-dom": "^19.0.0",
         "react-leaflet": "^5.0.0",
-        "react-leaflet-cluster": "^1.0.3",
         "react-router-dom": "^6.28.0",
         "react-scripts": "5.0.1",
         "react-toastify": "^11.0.5",
@@ -11429,15 +11428,6 @@
       "integrity": "sha512-nxS1ynzJOmOlHp+iL3FyWqK89GtNL8U8rvlMOsQdTTssxZwCXh8N2NB3GDQOL+YR3XnWyZAxwQixURb+FA74PA==",
       "license": "BSD-2-Clause"
     },
-    "node_modules/leaflet.markercluster": {
-      "version": "1.5.3",
-      "resolved": "https://registry.npmjs.org/leaflet.markercluster/-/leaflet.markercluster-1.5.3.tgz",
-      "integrity": "sha512-vPTw/Bndq7eQHjLBVlWpnGeLa3t+3zGiuM7fJwCkiMFq+nmRuG3RI3f7f4N4TDX7T4NpbAXpR2+NTRSEGfCSeA==",
-      "license": "MIT",
-      "peerDependencies": {
-        "leaflet": "^1.3.1"
-      }
-    },
     "node_modules/leven": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/leven/-/leven-3.1.0.tgz",
@@ -14452,21 +14442,6 @@
         "react-dom": "^19.0.0"
       }
     },
-    "node_modules/react-leaflet-cluster": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/react-leaflet-cluster/-/react-leaflet-cluster-1.0.4.tgz",
-      "integrity": "sha512-7sUtH35vf0JQIgiRHl4DWWy9JumEAhqDHfrjOlxIfCoHdeFFtnmHvdCetz/HJswHLLatwNZicCLx5DOFZzhL6g==",
-      "license": "SEE LICENSE IN <LICENSE>",
-      "dependencies": {
-        "leaflet.markercluster": "^1.5.3"
-      },
-      "peerDependencies": {
-        "leaflet": "^1.8.0",
-        "react": "^17.0.2",
-        "react-dom": "^17.0.2",
-        "react-leaflet": "^3.2.0"
-      }
-    },
     "node_modules/react-refresh": {
       "version": "0.11.0",
       "resolved": "https://registry.npmjs.org/react-refresh/-/react-refresh-0.11.0.tgz",
@@ -17039,6 +17014,20 @@
         "is-typedarray": "^1.0.0"
       }
     },
+    "node_modules/typescript": {
+      "version": "4.9.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
+      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
+      "license": "Apache-2.0",
+      "peer": true,
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=4.2.0"
+      }
+    },
     "node_modules/unbox-primitive": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/unbox-primitive/-/unbox-primitive-1.1.0.tgz",