Add APRS amateur radio tracking feature

- Create routes/aprs.py with start/stop/stream endpoints for APRS decoding
- Support multiple regional frequencies (North America, Europe, Australia, etc.)
- Use direwolf (preferred) or multimon-ng as AFSK1200 decoder
- Parse APRS packets for position, weather, messages, and telemetry
- Add APRS visualization panel with Leaflet map and station tracking
- Include station list with callsigns, distance, and last heard time
- Add packet log with raw APRS data display
- Register APRS blueprint and add global state management
- Add direwolf and multimon-ng to dependency definitions

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

utils/dependencies.py

@@ -209,6 +209,29 @@ TOOL_DEPENDENCIES = {
             }
         }
     },
+    'aprs': {
+        'name': 'APRS Tracking',
+        'tools': {
+            'direwolf': {
+                'required': False,
+                'description': 'APRS/packet radio decoder (preferred)',
+                'install': {
+                    'apt': 'sudo apt install direwolf',
+                    'brew': 'brew install direwolf',
+                    'manual': 'https://github.com/wb2osz/direwolf'
+                }
+            },
+            'multimon-ng': {
+                'required': False,
+                'description': 'Alternative AFSK1200 decoder',
+                'install': {
+                    'apt': 'sudo apt install multimon-ng',
+                    'brew': 'brew install multimon-ng',
+                    'manual': 'https://github.com/EliasOenal/multimon-ng'
+                }
+            }
+        }
+    },
     'satellite': {
         'name': 'Satellite Tracking',
         'tools': {