Add Listening Post, improve setup and documentation

- Add Listening Post mode with frequency scanner and audio monitoring
- Add dependency warning for aircraft dashboard listen feature
- Auto-restart audio when switching frequencies
- Fix toolbar overflow on aircraft dashboard custom frequency
- Update setup script with full macOS/Debian support
- Clean up README and documentation for clarity
- Add sox and dump1090 to Dockerfile
- Add comprehensive tool reference to HARDWARE.md
- Add correlation, settings, and database utilities
- Add new test files for routes, validation, correlation, database

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

routes/__init__.py

@@ -9,6 +9,9 @@ def register_blueprints(app):
     from .adsb import adsb_bp
     from .satellite import satellite_bp
     from .gps import gps_bp
+    from .settings import settings_bp
+    from .correlation import correlation_bp
+    from .listening_post import listening_post_bp
 
     app.register_blueprint(pager_bp)
     app.register_blueprint(sensor_bp)
@@ -17,3 +20,6 @@ def register_blueprints(app):
     app.register_blueprint(adsb_bp)
     app.register_blueprint(satellite_bp)
     app.register_blueprint(gps_bp)
+    app.register_blueprint(settings_bp)
+    app.register_blueprint(correlation_bp)
+    app.register_blueprint(listening_post_bp)