Convert desktop to EchoType Bridge: pipe injection via TIP

- Add EchoType to TextInjectionMode enum (becomes default)
- Add WriteToEchoTypePipe(): write [UINT32 cch][WCHAR text] to
  \.\pipe\EchoType\pid_<PID> via NamedPipeClientStream
- InsertText(): route to EchoType pipe when mode is EchoType
- TrayApplicationContext: add 'EchoType (recommended)' to input mode menu
- Update tray branding: 'EchoType Bridge' in tooltips and balloon tips
- AppLogger: log to %LocalAppData%\EchoType\bridge.log

The bridge keeps WebSocket server + UDP discovery + audio control
unchanged. Text injection now goes through the EchoType TIP's
composition-commit mechanism for atomic insertion, falling back to
clipboard and SendInput as secondary options.

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

WirelessTextSyncer.Windows/Tray/TrayApplicationContext.cs

@@ -12,6 +12,7 @@ public sealed class TrayApplicationContext : ApplicationContext
     private readonly Icon connectedIcon;
     private readonly Icon waitIcon;
     private readonly SynchronizationContext uiContext;
+    private ToolStripMenuItem? echoTypeMenuItem;
     private ToolStripMenuItem? clipboardPasteMenuItem;
     private ToolStripMenuItem? sendInputTypingMenuItem;
     private bool? lastConnectionState;
@@ -34,7 +35,7 @@ public sealed class TrayApplicationContext : ApplicationContext
         notifyIcon = new NotifyIcon
         {
             Icon = waitIcon,
-            Text = "WirelessTextSyncer starting...",
+            Text = "EchoType Bridge starting...",
             Visible = true,
             ContextMenuStrip = BuildMenu()
         };
@@ -49,7 +50,7 @@ public sealed class TrayApplicationContext : ApplicationContext
         catch (Exception ex)
         {
             AppLogger.Error("Failed to start tray application.", ex);
-            notifyIcon.BalloonTipTitle = "WirelessTextSyncer";
+            notifyIcon.BalloonTipTitle = "EchoType Bridge";
             notifyIcon.BalloonTipText = $"Failed to start: {ex.Message}";
             notifyIcon.ShowBalloonTip(5000);
         }
@@ -83,6 +84,10 @@ public sealed class TrayApplicationContext : ApplicationContext
     private ToolStripMenuItem BuildInputModeMenu()
     {
         var inputModeMenu = new ToolStripMenuItem("Input mode");
+        echoTypeMenuItem = new ToolStripMenuItem("EchoType (recommended)")
+        {
+            CheckOnClick = false
+        };
         clipboardPasteMenuItem = new ToolStripMenuItem("Clipboard paste")
         {
             CheckOnClick = false
@@ -92,8 +97,10 @@ public sealed class TrayApplicationContext : ApplicationContext
             CheckOnClick = false
         };
 
+        echoTypeMenuItem.Click += (_, _) => SetInputMode(TextInjectionMode.EchoType);
         clipboardPasteMenuItem.Click += (_, _) => SetInputMode(TextInjectionMode.ClipboardPaste);
         sendInputTypingMenuItem.Click += (_, _) => SetInputMode(TextInjectionMode.SendInputTyping);
+        inputModeMenu.DropDownItems.Add(echoTypeMenuItem);
         inputModeMenu.DropDownItems.Add(clipboardPasteMenuItem);
         inputModeMenu.DropDownItems.Add(sendInputTypingMenuItem);
         UpdateInputModeMenuChecks();
@@ -106,13 +113,18 @@ public sealed class TrayApplicationContext : ApplicationContext
         AppLogger.Info($"Text injection mode changed to {mode}.");
         UpdateInputModeMenuChecks();
 
-        notifyIcon.BalloonTipTitle = "WirelessTextSyncer";
+        notifyIcon.BalloonTipTitle = "EchoType Bridge";
         notifyIcon.BalloonTipText = $"Input mode: {GetInputModeLabel(mode)}";
         notifyIcon.ShowBalloonTip(1500);
     }
 
     private void UpdateInputModeMenuChecks()
     {
+        if (echoTypeMenuItem is not null)
+        {
+            echoTypeMenuItem.Checked = keyboard.Mode == TextInjectionMode.EchoType;
+        }
+
         if (clipboardPasteMenuItem is not null)
         {
             clipboardPasteMenuItem.Checked = keyboard.Mode == TextInjectionMode.ClipboardPaste;
@@ -126,7 +138,9 @@ public sealed class TrayApplicationContext : ApplicationContext
 
     private static string GetInputModeLabel(TextInjectionMode mode)
     {
-        return mode == TextInjectionMode.ClipboardPaste ? "Clipboard paste" : "SendInput typing";
+        return mode == TextInjectionMode.EchoType ? "EchoType"
+             : mode == TextInjectionMode.ClipboardPaste ? "Clipboard paste"
+             : "SendInput typing";
     }
 
     private void OnTrayIconClicked(object? sender, MouseEventArgs e)
@@ -140,7 +154,7 @@ public sealed class TrayApplicationContext : ApplicationContext
     private void CopyConnectionAddress()
     {
         Clipboard.SetText($"ws://{server.LocalIpAddress}:{server.Port}");
-        notifyIcon.BalloonTipTitle = "WirelessTextSyncer";
+        notifyIcon.BalloonTipTitle = "EchoType Bridge";
         notifyIcon.BalloonTipText = "Connection address copied.";
         notifyIcon.ShowBalloonTip(1500);
     }
@@ -154,7 +168,7 @@ public sealed class TrayApplicationContext : ApplicationContext
 
         var connected = server.HasClient;
         var status = connected ? "connected" : "waiting";
-        var text = $"WirelessTextSyncer {server.LocalIpAddress}:{server.Port} ({status})";
+        var text = $"EchoType Bridge {server.LocalIpAddress}:{server.Port} ({status})";
         notifyIcon.Icon = connected ? connectedIcon : waitIcon;
         notifyIcon.Text = text.Length > 63 ? text[..63] : text;
 
@@ -168,7 +182,7 @@ public sealed class TrayApplicationContext : ApplicationContext
 
     private void ShowConnectionToast(bool connected)
     {
-        notifyIcon.BalloonTipTitle = "WirelessTextSyncer";
+        notifyIcon.BalloonTipTitle = "EchoType Bridge";
         notifyIcon.BalloonTipText = connected
             ? $"Device connected to {server.LocalIpAddress}:{server.Port}."
             : "Device disconnected. Waiting for connection.";