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_flight_correlator.py

@@ -0,0 +1,99 @@
+"""Tests for FlightCorrelator: ACARS/VDL2 message matching."""
+
+import pytest
+
+from utils.flight_correlator import FlightCorrelator
+
+
+class TestFlightCorrelator:
+    """Test ACARS/VDL2 message matching by callsign."""
+
+    @pytest.fixture(autouse=True)
+    def setup(self):
+        self.correlator = FlightCorrelator(max_messages=100)
+
+    def test_add_acars_message(self):
+        self.correlator.add_acars_message({
+            'flight': 'BAW123', 'tail': 'G-ABCD', 'text': 'Hello',
+        })
+        assert self.correlator.acars_count == 1
+
+    def test_add_vdl2_message(self):
+        self.correlator.add_vdl2_message({
+            'flight': 'DLH456', 'text': 'World',
+        })
+        assert self.correlator.vdl2_count == 1
+
+    def test_match_by_callsign(self):
+        self.correlator.add_acars_message({
+            'flight': 'BAW123', 'text': 'msg1',
+        })
+        self.correlator.add_acars_message({
+            'flight': 'DLH456', 'text': 'msg2',
+        })
+
+        result = self.correlator.get_messages_for_aircraft(callsign='BAW123')
+        assert len(result['acars']) == 1
+        assert result['acars'][0]['text'] == 'msg1'
+
+    def test_match_by_icao(self):
+        self.correlator.add_vdl2_message({
+            'icao': 'ABC123', 'text': 'vdl2 msg',
+        })
+
+        result = self.correlator.get_messages_for_aircraft(icao='ABC123')
+        assert len(result['vdl2']) == 1
+        assert result['vdl2'][0]['text'] == 'vdl2 msg'
+
+    def test_no_match_returns_empty(self):
+        self.correlator.add_acars_message({'flight': 'BAW123', 'text': 'msg'})
+
+        result = self.correlator.get_messages_for_aircraft(callsign='NOMATCH')
+        assert result['acars'] == []
+        assert result['vdl2'] == []
+
+    def test_empty_search_returns_empty(self):
+        result = self.correlator.get_messages_for_aircraft()
+        assert result == {'acars': [], 'vdl2': []}
+
+    def test_ring_buffer_limit(self):
+        correlator = FlightCorrelator(max_messages=5)
+        for i in range(10):
+            correlator.add_acars_message({'flight': f'FL{i}', 'text': f'msg{i}'})
+
+        assert correlator.acars_count == 5
+        # First 5 messages should have been evicted
+        result = correlator.get_messages_for_aircraft(callsign='FL0')
+        assert len(result['acars']) == 0
+        # Last message should still be there
+        result = correlator.get_messages_for_aircraft(callsign='FL9')
+        assert len(result['acars']) == 1
+
+    def test_case_insensitive_matching(self):
+        self.correlator.add_acars_message({'flight': 'baw123', 'text': 'lowercase'})
+
+        result = self.correlator.get_messages_for_aircraft(callsign='BAW123')
+        assert len(result['acars']) == 1
+
+    def test_match_by_tail_field(self):
+        self.correlator.add_acars_message({
+            'tail': 'G-ABCD', 'text': 'tail match',
+        })
+
+        result = self.correlator.get_messages_for_aircraft(callsign='G-ABCD')
+        assert len(result['acars']) == 1
+
+    def test_internal_fields_not_returned(self):
+        self.correlator.add_acars_message({'flight': 'TEST', 'text': 'msg'})
+
+        result = self.correlator.get_messages_for_aircraft(callsign='TEST')
+        msg = result['acars'][0]
+        assert '_corr_time' not in msg
+
+    def test_both_acars_and_vdl2_returned(self):
+        self.correlator.add_acars_message({'flight': 'UAL789', 'text': 'acars'})
+        self.correlator.add_vdl2_message({'flight': 'UAL789', 'text': 'vdl2'})
+
+        result = self.correlator.get_messages_for_aircraft(callsign='UAL789')
+        assert len(result['acars']) == 1
+        assert len(result['vdl2']) == 1