Add Debug page and fix BLE communication issues

Major changes:
- Added Debug tab with real-time message logging and hex viewer
- Implemented timed data logging ($UMTDL command) per API v1.3
- Fixed BLE message parsing to handle notifications without line endings
- Added Schema 2 support (22-field timed logging packets)
- Updated Maglink BLE UUIDs (fff0/fff1/fff2)
- Added connection timeout (10s) to prevent hanging on unavailable devices
- Added connection status display and manual push-button logging trigger
- Improved retry logging with attempt numbers and delays
- Added console window allocation for Windows debug output
- Added BLE disconnect on app close

Bug fixes:
- Fixed device name filtering for Maglink (ML-* prefix)
- Fixed RtkGps enum reference in DeviceScanViewModel
- Fixed DebugMessage namespace (moved to Models)

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

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

FieldLogger/App.xaml.cs

@@ -1,14 +1,57 @@
-namespace FieldLogger;
+using FieldLogger.Services;
+
+namespace FieldLogger;
 
 public partial class App : Application
 {
-	public App()
+	private readonly DeviceConnectionManager _connectionManager;
+
+	public App(DeviceConnectionManager connectionManager)
 	{
 		InitializeComponent();
+		_connectionManager = connectionManager;
+
+		Console.WriteLine("===== FIELD LOGGER APP STARTING =====");
+		Console.WriteLine($"Console output is working! Time: {DateTime.Now:HH:mm:ss}");
 	}
 
 	protected override Window CreateWindow(IActivationState? activationState)
 	{
-		return new Window(new AppShell());
+		var window = new Window(new AppShell());
+
+		// Disconnect BLE devices when window is closing
+		window.Destroying += async (s, e) =>
+		{
+			Console.WriteLine("App: Window closing, disconnecting devices...");
+			await DisconnectAllDevicesAsync();
+		};
+
+		return window;
+	}
+
+	private async Task DisconnectAllDevicesAsync()
+	{
+		try
+		{
+			// Disconnect locator
+			if (_connectionManager.Locator.IsConnected)
+			{
+				Console.WriteLine("App: Disconnecting locator...");
+				await _connectionManager.Locator.DisconnectAsync();
+			}
+
+			// Disconnect GPS
+			if (_connectionManager.Gps.IsConnected)
+			{
+				Console.WriteLine("App: Disconnecting GPS...");
+				await _connectionManager.Gps.DisconnectAsync();
+			}
+
+			Console.WriteLine("App: All devices disconnected");
+		}
+		catch (Exception ex)
+		{
+			Console.WriteLine($"App: Error disconnecting devices: {ex.Message}");
+		}
 	}
 }