chore: initial commit of TaskTracker project

Existing ASP.NET API with vanilla JS SPA, WindowWatcher, Chrome extension, and MCP server.

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

WindowWatcher/NativeMethods.cs

@@ -0,0 +1,16 @@
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace WindowWatcher;
+
+internal static partial class NativeMethods
+{
+    [LibraryImport("user32.dll")]
+    internal static partial IntPtr GetForegroundWindow();
+
+    [DllImport("user32.dll", CharSet = CharSet.Unicode)]
+    internal static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);
+
+    [LibraryImport("user32.dll", SetLastError = true)]
+    internal static partial uint GetWindowThreadProcessId(IntPtr hWnd, out uint processId);
+}