Add DMR digital voice, WebSDR, and listening post enhancements

- DMR/P25 digital voice decoder mode with DSD-FME integration
- WebSDR mode with KiwiSDR audio proxy and websocket-client support
- Listening post waterfall/spectrogram visualization and audio streaming
- Dockerfile updates for mbelib and DSD-FME build dependencies
- New tests for DMR, WebSDR, KiwiSDR, waterfall, and signal guess API
- Chart.js date adapter for time-scale axes

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

app.py

@@ -105,7 +105,7 @@ def inject_offline_settings():
             'enabled': get_setting('offline.enabled', False),
             'assets_source': get_setting('offline.assets_source', 'cdn'),
             'fonts_source': get_setting('offline.fonts_source', 'cdn'),
-            'tile_provider': get_setting('offline.tile_provider', 'cartodb_dark_cyan'),
+            'tile_provider': get_setting('offline.tile_provider', 'cartodb_dark_cyan'),
             'tile_server_url': get_setting('offline.tile_server_url', '')
         }
     }
@@ -172,6 +172,12 @@ dsc_rtl_process = None
 dsc_queue = queue.Queue(maxsize=QUEUE_MAX_SIZE)
 dsc_lock = threading.Lock()
 
+# DMR / Digital Voice
+dmr_process = None
+dmr_rtl_process = None
+dmr_queue = queue.Queue(maxsize=QUEUE_MAX_SIZE)
+dmr_lock = threading.Lock()
+
 # TSCM (Technical Surveillance Countermeasures)
 tscm_queue = queue.Queue(maxsize=QUEUE_MAX_SIZE)
 tscm_lock = threading.Lock()
@@ -278,13 +284,13 @@ def get_sdr_device_status() -> dict[int, str]:
 # ============================================
 
 @app.before_request
-def require_login():
-    # Routes that don't require login (to avoid infinite redirect loop)
-    allowed_routes = ['login', 'static', 'favicon', 'health', 'health_check']
-
-    # Allow audio streaming endpoints without session auth
-    if request.path.startswith('/listening/audio/'):
-        return None
+def require_login():
+    # Routes that don't require login (to avoid infinite redirect loop)
+    allowed_routes = ['login', 'static', 'favicon', 'health', 'health_check']
+
+    # Allow audio streaming endpoints without session auth
+    if request.path.startswith('/listening/audio/'):
+        return None
 
     # Controller API endpoints use API key auth, not session auth
     # Allow agent push/pull endpoints without session login
@@ -635,6 +641,7 @@ def health_check() -> Response:
             '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': dmr_process is not None and (dmr_process.poll() is None if dmr_process else False),
         },
         'data': {
             'aircraft_count': len(adsb_aircraft),
@@ -652,6 +659,7 @@ def kill_all() -> Response:
     """Kill all decoder, WiFi, and Bluetooth processes."""
     global current_process, sensor_process, wifi_process, adsb_process, ais_process, acars_process
     global aprs_process, aprs_rtl_process, dsc_process, dsc_rtl_process, bt_process
+    global dmr_process, dmr_rtl_process
 
     # Import adsb and ais modules to reset their state
     from routes import adsb as adsb_module
@@ -663,7 +671,7 @@ def kill_all() -> Response:
         'rtl_fm', 'multimon-ng', 'rtl_433',
         'airodump-ng', 'aireplay-ng', 'airmon-ng',
         'dump1090', 'acarsdec', 'direwolf', 'AIS-catcher',
-        'hcitool', 'bluetoothctl'
+        'hcitool', 'bluetoothctl', 'dsd'
     ]
 
     for proc in processes_to_kill:
@@ -707,6 +715,11 @@ def kill_all() -> Response:
         dsc_process = None
         dsc_rtl_process = None
 
+    # Reset DMR state
+    with dmr_lock:
+        dmr_process = None
+        dmr_rtl_process = None
+
     # Reset Bluetooth state (legacy)
     with bt_lock:
         if bt_process:
@@ -847,6 +860,14 @@ def main() -> None:
     except ImportError as e:
         print(f"WebSocket audio disabled (install flask-sock): {e}")
 
+    # Initialize KiwiSDR WebSocket audio proxy
+    try:
+        from routes.websdr import init_websdr_audio
+        init_websdr_audio(app)
+        print("KiwiSDR audio proxy enabled")
+    except ImportError as e:
+        print(f"KiwiSDR audio proxy disabled: {e}")
+
     print(f"Open http://localhost:{args.port} in your browser")
     print()
     print("Press Ctrl+C to stop")