Feature: Task Management with AI Extraction

[avikeid2007]

Summary

Add a task/to-do management system. AI can extract action items from conversations and users can manage tasks within the app.

Motivation

Keeps users inside KaiROS for daily productivity. AI-powered task extraction from chat is a unique differentiator.

Detailed Requirements

Data Model: TaskItem.cs

public class TaskItem
{
    public string Id { get; set; } = Guid.NewGuid().ToString();
    public string Title { get; set; }
    public string Description { get; set; }
    public TaskPriority Priority { get; set; }  // Low, Medium, High, Critical
    public TaskItemStatus Status { get; set; }  // Todo, InProgress, Done
    public DateTime CreatedAt { get; set; }
    public DateTime? DueDate { get; set; }
    public DateTime? CompletedAt { get; set; }
    public string SourceSessionId { get; set; }  // Chat session that created it
}

public enum TaskPriority { Low, Medium, High, Critical }
public enum TaskItemStatus { Todo, InProgress, Done }

Database (DatabaseService.cs)

Add Tasks table with CRUD methods.

AI Integration

• "Extract Tasks" button in chat toolbar sends conversation to LLM with prompt: "Extract all action items, to-dos, and tasks from this conversation. Return as JSON array."
• Parse LLM response and create TaskItem entries
• Auto-suggest: After lengthy AI response, offer to extract tasks
• Natural language creation: "Add a task to review the code by Friday" detected in chat input

UI: TasksView.xaml

• Task list with filters (All, Active, Completed, Overdue)
• Inline editing of title, priority, due date
• Priority badges (color-coded: Low=gray, Medium=blue, High=orange, Critical=red)
• Checkbox to mark complete
• "Extract from Chat" button opens session picker
• Sort by: date created, due date, priority

Navigation

Add "Tasks" to MainWindow.xaml NavigationView (Tag="5", Icon: ).

Files to Create/Modify

• [NEW] Models/TaskItem.cs
• [NEW] Views/TasksView.xaml + TasksView.xaml.cs
• [NEW] ViewModels/TasksViewModel.cs
• [NEW] Services/TaskService.cs + ITaskService.cs
• [MODIFY] Services/DatabaseService.cs - add Tasks table
• [MODIFY] MainWindow.xaml - add Tasks nav item
• [MODIFY] MainWindow.xaml.cs - handle Tasks navigation
• [MODIFY] ViewModels/ChatViewModel.cs - add "Extract Tasks" command

Acceptance Criteria

• Create, edit, complete, delete tasks
• AI extracts action items from chat conversations
• Tasks have priority, status, and optional due dates
• Filter by status (active/completed/overdue)
• Tasks persist in SQLite
• Color-coded priority badges