Feature: AI Image Generation Integration

[avikeid2007]

Summary

Add AI image generation capability - generate images from text prompts using Stable Diffusion (local) or API-based providers.

Motivation

Visual content creation is a popular AI use case. Integrating it keeps users in the KaiROS ecosystem for both text and image generation.

Detailed Requirements

Service: ImageGenerationService.cs

public interface IImageGenerationService
{
    bool IsConfigured { get; }
    Task<GeneratedImage> GenerateAsync(ImageGenRequest request, CancellationToken ct);
    Task<List<string>> GetAvailableModelsAsync();
}

public class ImageGenRequest
{
    public string Prompt { get; set; }
    public string NegativePrompt { get; set; }
    public int Width { get; set; } = 512;
    public int Height { get; set; } = 512;
    public int Steps { get; set; } = 20;
    public string Model { get; set; }
}

public class GeneratedImage
{
    public string FilePath { get; set; }  // Saved to local gallery
    public byte[] ImageBytes { get; set; }
    public string Prompt { get; set; }
    public DateTime GeneratedAt { get; set; }
}

Support multiple backends:

1. API-based: OpenAI DALL-E API, Stability AI API (via REST)
2. Local: Stable Diffusion via API (user runs ComfyUI or Automatic1111 locally, KaiROS connects to their API)

Chat Integration

• Detect image generation intent (user types "generate an image of..." or "/imagine ...")
• Display generated image inline in chat message bubble
• Save generated images to %LocalAppData%/KaiROS.AI/gallery/
• Right-click context menu: Save As, Copy, Regenerate

Settings (SettingsView.xaml)

• "Image Generation" section:
  • Backend selector: None / OpenAI / Stability AI / Local (ComfyUI/A1111)
  • API URL field (for local backends)
  • API key field (for cloud backends, stored securely)
  • Default image size, steps, model

Files to Create/Modify

• [NEW] Services/ImageGenerationService.cs + IImageGenerationService.cs
• [NEW] Models/ImageGenModels.cs
• [MODIFY] ViewModels/ChatViewModel.cs - detect image requests, display images
• [MODIFY] Views/ChatView.xaml - image display in chat bubbles
• [MODIFY] Views/SettingsView.xaml - image gen settings section
• [MODIFY] ViewModels/SettingsViewModel.cs - image gen settings

Acceptance Criteria

• Generate images from text prompts via configured API
• Images displayed inline in chat message bubbles
• Support local Stable Diffusion API (ComfyUI/A1111 endpoints)
• Support at least one cloud API (OpenAI DALL-E or Stability AI)
• Images saveable to disk via right-click or save button
• Backend configurable in Settings