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>

TaskTracker.Core/DTOs/ApiResponse.cs

@@ -0,0 +1,20 @@
+namespace TaskTracker.Core.DTOs;
+
+public class ApiResponse<T>
+{
+    public bool Success { get; set; }
+    public T? Data { get; set; }
+    public string? Error { get; set; }
+
+    public static ApiResponse<T> Ok(T data) => new() { Success = true, Data = data };
+    public static ApiResponse<T> Fail(string error) => new() { Success = false, Error = error };
+}
+
+public class ApiResponse
+{
+    public bool Success { get; set; }
+    public string? Error { get; set; }
+
+    public static ApiResponse Ok() => new() { Success = true };
+    public static ApiResponse Fail(string error) => new() { Success = false, Error = error };
+}

TaskTracker.Core/DTOs/ContextEventRequest.cs

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+namespace TaskTracker.Core.DTOs;
+
+public class ContextEventRequest
+{
+    public string Source { get; set; } = string.Empty;
+    public string AppName { get; set; } = string.Empty;
+    public string WindowTitle { get; set; } = string.Empty;
+    public string? Url { get; set; }
+}

TaskTracker.Core/DTOs/ContextSummaryItem.cs

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+namespace TaskTracker.Core.DTOs;
+
+public class ContextSummaryItem
+{
+    public string AppName { get; set; } = string.Empty;
+    public string Category { get; set; } = string.Empty;
+    public int EventCount { get; set; }
+    public DateTime FirstSeen { get; set; }
+    public DateTime LastSeen { get; set; }
+}

TaskTracker.Core/DTOs/CreateAppMappingRequest.cs

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+namespace TaskTracker.Core.DTOs;
+
+public class CreateAppMappingRequest
+{
+    public string Pattern { get; set; } = string.Empty;
+    public string MatchType { get; set; } = string.Empty;
+    public string Category { get; set; } = string.Empty;
+    public string? FriendlyName { get; set; }
+}

TaskTracker.Core/DTOs/CreateNoteRequest.cs

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+using TaskTracker.Core.Enums;
+
+namespace TaskTracker.Core.DTOs;
+
+public class CreateNoteRequest
+{
+    public string Content { get; set; } = string.Empty;
+    public NoteType Type { get; set; } = NoteType.General;
+}

TaskTracker.Core/DTOs/CreateTaskRequest.cs

@@ -0,0 +1,9 @@
+namespace TaskTracker.Core.DTOs;
+
+public class CreateTaskRequest
+{
+    public string Title { get; set; } = string.Empty;
+    public string? Description { get; set; }
+    public string? Category { get; set; }
+    public int? ParentTaskId { get; set; }
+}

TaskTracker.Core/DTOs/TaskActionRequest.cs

@@ -0,0 +1,6 @@
+namespace TaskTracker.Core.DTOs;
+
+public class TaskActionRequest
+{
+    public string? Note { get; set; }
+}