feat: Add cross-mode analytics dashboard with geofencing, correlations, and data export

Adds a unified analytics mode under the Security nav group that aggregates
data across all signal modes. Includes emergency squawk alerting (7700/7600/7500),
vertical rate anomaly detection, ACARS/VDL2-to-ADS-B flight correlation,
geofence zones with enter/exit detection for aircraft/vessels/APRS stations,
temporal pattern detection, RSSI history tracking, Meshtastic topology mapping,
and JSON/CSV data export.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_geofence.py

@@ -0,0 +1,114 @@
+"""Tests for geofence haversine, enter/exit detection, and persistence."""
+
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+
+class TestHaversineDistance:
+    """Test haversine_distance accuracy."""
+
+    def test_same_point_zero_distance(self):
+        from utils.geofence import haversine_distance
+        assert haversine_distance(51.5, -0.1, 51.5, -0.1) == 0.0
+
+    def test_known_distance_london_paris(self):
+        from utils.geofence import haversine_distance
+        # London to Paris ~340km
+        dist = haversine_distance(51.5074, -0.1278, 48.8566, 2.3522)
+        assert 340_000 < dist < 345_000
+
+    def test_short_distance(self):
+        from utils.geofence import haversine_distance
+        # Two points ~111m apart (0.001 degrees latitude at equator)
+        dist = haversine_distance(0.0, 0.0, 0.001, 0.0)
+        assert 100 < dist < 120
+
+    def test_antipodal_distance(self):
+        from utils.geofence import haversine_distance
+        # North pole to south pole ~20015km
+        dist = haversine_distance(90.0, 0.0, -90.0, 0.0)
+        assert 20_000_000 < dist < 20_050_000
+
+
+class TestGeofenceManager:
+    """Test enter/exit detection logic."""
+
+    @pytest.fixture(autouse=True)
+    def _setup(self):
+        """Provide a fresh GeofenceManager with mocked DB."""
+        from utils.geofence import GeofenceManager
+
+        with patch('utils.geofence._ensure_table'), patch('utils.geofence.get_db') as mock_db:
+            # Mock the context manager
+            mock_conn = MagicMock()
+            mock_db.return_value.__enter__ = MagicMock(return_value=mock_conn)
+            mock_db.return_value.__exit__ = MagicMock(return_value=False)
+
+            self.manager = GeofenceManager()
+            # Override list_zones to return test data
+            self._zones = []
+            self.manager.list_zones = lambda: self._zones
+
+    def test_no_zones_returns_empty(self):
+        events = self.manager.check_position('TEST1', 'aircraft', 51.5, -0.1)
+        assert events == []
+
+    def test_enter_event(self):
+        self._zones = [{
+            'id': 1, 'name': 'London', 'lat': 51.5074, 'lon': -0.1278,
+            'radius_m': 10000, 'alert_on': 'enter_exit',
+        }]
+        # First position inside zone
+        events = self.manager.check_position('AC1', 'aircraft', 51.5074, -0.1278)
+        assert len(events) == 1
+        assert events[0]['type'] == 'geofence_enter'
+        assert events[0]['zone_name'] == 'London'
+
+    def test_no_duplicate_enter(self):
+        self._zones = [{
+            'id': 1, 'name': 'London', 'lat': 51.5074, 'lon': -0.1278,
+            'radius_m': 10000, 'alert_on': 'enter_exit',
+        }]
+        # First enter
+        self.manager.check_position('AC1', 'aircraft', 51.5074, -0.1278)
+        # Second check still inside - should not fire enter again
+        events = self.manager.check_position('AC1', 'aircraft', 51.508, -0.128)
+        assert len(events) == 0
+
+    def test_exit_event(self):
+        self._zones = [{
+            'id': 1, 'name': 'London', 'lat': 51.5074, 'lon': -0.1278,
+            'radius_m': 1000, 'alert_on': 'enter_exit',
+        }]
+        # Enter
+        self.manager.check_position('AC1', 'aircraft', 51.5074, -0.1278)
+        # Exit (far away)
+        events = self.manager.check_position('AC1', 'aircraft', 52.0, 0.0)
+        assert len(events) == 1
+        assert events[0]['type'] == 'geofence_exit'
+
+    def test_enter_only_mode(self):
+        self._zones = [{
+            'id': 1, 'name': 'London', 'lat': 51.5074, 'lon': -0.1278,
+            'radius_m': 1000, 'alert_on': 'enter',
+        }]
+        # Enter
+        events = self.manager.check_position('AC1', 'aircraft', 51.5074, -0.1278)
+        assert len(events) == 1
+        assert events[0]['type'] == 'geofence_enter'
+        # Exit should not fire
+        events = self.manager.check_position('AC1', 'aircraft', 52.0, 0.0)
+        assert len(events) == 0
+
+    def test_metadata_included_in_event(self):
+        self._zones = [{
+            'id': 1, 'name': 'Zone', 'lat': 0.0, 'lon': 0.0,
+            'radius_m': 100000, 'alert_on': 'enter_exit',
+        }]
+        events = self.manager.check_position(
+            'AC1', 'aircraft', 0.0, 0.0,
+            metadata={'callsign': 'TEST01', 'altitude': 35000}
+        )
+        assert events[0]['callsign'] == 'TEST01'
+        assert events[0]['altitude'] == 35000