chore: Bump version to v2.18.0

Bluetooth enhancements (service data inspector, appearance codes, MAC
cluster tracking, behavioral flags, IRK badges, distance estimation),
ACARS SoapySDR multi-backend support, dump1090 stale process cleanup,
GPS error state, and proximity radar/signal card UI improvements.

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

app.py

@@ -29,7 +29,7 @@ from flask import Flask, render_template, jsonify, send_file, Response, request,
 from werkzeug.security import check_password_hash
 from config import VERSION, CHANGELOG, SHARED_OBSERVER_LOCATION_ENABLED, DEFAULT_LATITUDE, DEFAULT_LONGITUDE
 from utils.dependencies import check_tool, check_all_dependencies, TOOL_DEPENDENCIES
-from utils.process import cleanup_stale_processes
+from utils.process import cleanup_stale_processes, cleanup_stale_dump1090
 from utils.sdr import SDRFactory
 from utils.cleanup import DataStore, cleanup_manager
 from utils.constants import (
@@ -647,27 +647,27 @@ def export_bluetooth() -> Response:
         })
 
 
-def _get_subghz_active() -> bool:
-    """Check if SubGHz manager has an active process."""
-    try:
-        from utils.subghz import get_subghz_manager
-        return get_subghz_manager().active_mode != 'idle'
-    except Exception:
-        return False
-
-
-def _get_dmr_active() -> bool:
-    """Check if Digital Voice decoder has an active process."""
-    try:
-        from routes import dmr as dmr_module
-        proc = dmr_module.dmr_dsd_process
-        return bool(dmr_module.dmr_running and proc and proc.poll() is None)
-    except Exception:
-        return False
-
-
-@app.route('/health')
-def health_check() -> Response:
+def _get_subghz_active() -> bool:
+    """Check if SubGHz manager has an active process."""
+    try:
+        from utils.subghz import get_subghz_manager
+        return get_subghz_manager().active_mode != 'idle'
+    except Exception:
+        return False
+
+
+def _get_dmr_active() -> bool:
+    """Check if Digital Voice decoder has an active process."""
+    try:
+        from routes import dmr as dmr_module
+        proc = dmr_module.dmr_dsd_process
+        return bool(dmr_module.dmr_running and proc and proc.poll() is None)
+    except Exception:
+        return False
+
+
+@app.route('/health')
+def health_check() -> Response:
     """Health check endpoint for monitoring."""
     import time
     return jsonify({
@@ -681,12 +681,12 @@ def health_check() -> Response:
             'ais': ais_process is not None and (ais_process.poll() is None if ais_process else False),
             'acars': acars_process is not None and (acars_process.poll() is None if acars_process else False),
             'aprs': aprs_process is not None and (aprs_process.poll() is None if aprs_process else False),
-            'wifi': wifi_process is not None and (wifi_process.poll() is None if wifi_process else False),
-            'bluetooth': bt_process is not None and (bt_process.poll() is None if bt_process else False),
-            'dsc': dsc_process is not None and (dsc_process.poll() is None if dsc_process else False),
-            'dmr': _get_dmr_active(),
-            'subghz': _get_subghz_active(),
-        },
+            'wifi': wifi_process is not None and (wifi_process.poll() is None if wifi_process else False),
+            'bluetooth': bt_process is not None and (bt_process.poll() is None if bt_process else False),
+            'dsc': dsc_process is not None and (dsc_process.poll() is None if dsc_process else False),
+            'dmr': _get_dmr_active(),
+            'subghz': _get_subghz_active(),
+        },
         'data': {
             'aircraft_count': len(adsb_aircraft),
             'vessel_count': len(ais_vessels),
@@ -877,6 +877,7 @@ def main() -> None:
 
     # Clean up any stale processes from previous runs
     cleanup_stale_processes()
+    cleanup_stale_dump1090()
 
     # Initialize database for settings storage
     from utils.database import init_db