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>

utils/analytics.py

@@ -0,0 +1,148 @@
+"""Cross-mode analytics: activity tracking, summaries, and emergency squawk detection."""
+
+from __future__ import annotations
+
+import time
+from collections import deque
+from typing import Any
+
+import app as app_module
+
+
+class ModeActivityTracker:
+    """Track device counts per mode in time-bucketed ring buffer for sparklines."""
+
+    def __init__(self, max_buckets: int = 60, bucket_interval: float = 5.0):
+        self._max_buckets = max_buckets
+        self._bucket_interval = bucket_interval
+        self._history: dict[str, deque] = {}
+        self._last_record_time = 0.0
+
+    def record(self) -> None:
+        """Snapshot current counts for all modes."""
+        now = time.time()
+        if now - self._last_record_time < self._bucket_interval:
+            return
+        self._last_record_time = now
+
+        counts = _get_mode_counts()
+        for mode, count in counts.items():
+            if mode not in self._history:
+                self._history[mode] = deque(maxlen=self._max_buckets)
+            self._history[mode].append(count)
+
+    def get_sparkline(self, mode: str) -> list[int]:
+        """Return sparkline array for a mode."""
+        self.record()
+        return list(self._history.get(mode, []))
+
+    def get_all_sparklines(self) -> dict[str, list[int]]:
+        """Return sparkline arrays for all tracked modes."""
+        self.record()
+        return {mode: list(values) for mode, values in self._history.items()}
+
+
+# Singleton
+_tracker: ModeActivityTracker | None = None
+
+
+def get_activity_tracker() -> ModeActivityTracker:
+    global _tracker
+    if _tracker is None:
+        _tracker = ModeActivityTracker()
+    return _tracker
+
+
+def _get_mode_counts() -> dict[str, int]:
+    """Read current entity counts from app_module DataStores."""
+    counts: dict[str, int] = {}
+    try:
+        counts['adsb'] = len(app_module.adsb_aircraft)
+    except Exception:
+        counts['adsb'] = 0
+    try:
+        counts['ais'] = len(app_module.ais_vessels)
+    except Exception:
+        counts['ais'] = 0
+    try:
+        counts['wifi'] = len(app_module.wifi_networks)
+    except Exception:
+        counts['wifi'] = 0
+    try:
+        counts['bluetooth'] = len(app_module.bt_devices)
+    except Exception:
+        counts['bluetooth'] = 0
+    try:
+        counts['dsc'] = len(app_module.dsc_messages)
+    except Exception:
+        counts['dsc'] = 0
+    return counts
+
+
+def get_cross_mode_summary() -> dict[str, Any]:
+    """Return counts dict for all active DataStores."""
+    counts = _get_mode_counts()
+    try:
+        counts['wifi_clients'] = len(app_module.wifi_clients)
+    except Exception:
+        counts['wifi_clients'] = 0
+    return counts
+
+
+def get_mode_health() -> dict[str, dict]:
+    """Check process refs and SDR status for each mode."""
+    health: dict[str, dict] = {}
+
+    process_map = {
+        'pager': 'current_process',
+        'sensor': 'sensor_process',
+        'adsb': 'adsb_process',
+        'ais': 'ais_process',
+        'acars': 'acars_process',
+        'vdl2': 'vdl2_process',
+        'aprs': 'aprs_process',
+        'wifi': 'wifi_process',
+        'bluetooth': 'bt_process',
+        'dsc': 'dsc_process',
+    }
+
+    for mode, attr in process_map.items():
+        proc = getattr(app_module, attr, None)
+        running = proc is not None and (proc.poll() is None if proc else False)
+        health[mode] = {'running': running}
+
+    try:
+        sdr_status = app_module.get_sdr_device_status()
+        health['sdr_devices'] = {str(k): v for k, v in sdr_status.items()}
+    except Exception:
+        health['sdr_devices'] = {}
+
+    return health
+
+
+EMERGENCY_SQUAWKS = {
+    '7700': 'General Emergency',
+    '7600': 'Comms Failure',
+    '7500': 'Hijack',
+}
+
+
+def get_emergency_squawks() -> list[dict]:
+    """Iterate adsb_aircraft DataStore for emergency squawk codes."""
+    emergencies: list[dict] = []
+    try:
+        for icao, aircraft in app_module.adsb_aircraft.items():
+            sq = str(aircraft.get('squawk', '')).strip()
+            if sq in EMERGENCY_SQUAWKS:
+                emergencies.append({
+                    'icao': icao,
+                    'callsign': aircraft.get('callsign', ''),
+                    'squawk': sq,
+                    'meaning': EMERGENCY_SQUAWKS[sq],
+                    'altitude': aircraft.get('altitude'),
+                    'lat': aircraft.get('lat'),
+                    'lon': aircraft.get('lon'),
+                })
+    except Exception:
+        pass
+    return emergencies