[draft] feat: AI contextual chat

[croossin]

Add AI Chat Integration with OpenAI Support

This PR introduces a way for users to chat with AI about any web page. The feature is accessible via CMD + / and includes secure API key management, real-time streaming responses, and intelligent page content analysis.

Features Added

AI Chat Panel

• Keyboard shortcut CMD + / opens/closes chat panel on the right side
• Model selection dropdown (GPT-4, GPT-4 Turbo, etc.)

Secure API Key Management (BYOK)

• API keys stored securely in macOS Keychain (not UserDefaults)
• New "AI" tab in Settings with provider status and key management
• Clear provider status indicators and model availability display

Intelligent Page Context

• Automatically extracts page content (title, description, main text) on first message
• Only sends page content once per conversation to optimize token usage
• Robust JavaScript-based content extraction from web pages
• Debug logging shows extracted content during development

Real-time Streaming Responses

• Responses stream in word-by-word like modern AI chat interfaces
• Single message bubble that fills as content streams
• Graceful error handling for API failures
• Professional chat experience

Architecture

Provider System

• Extensible design for adding Claude, Gemini, and other providers
• Protocol-based abstraction for different AI services
• Built-in streaming support for real-time responses

Security

• New KeychainService.swift for secure API key storage
• Fixed service identifier for consistent keychain access across builds
• Keys are encrypted and device-bound

UI Integration

• New AI settings tab with provider management
• Chat panel integrated into browser's split-view system
• Consistent animations and styling with existing UI

Dependencies

• AIProxySwift 0.129.0 for OpenAI API integration with BYOK support
• Native macOS Keychain Services for secure storage

Demo

CleanShot.2025-10-05.at.10.18.07.mp4

[JohnnWi]

is possible to add the support gpt 5 nano? And maybe even a setting to adjust the level of reasoning. If this feature is integrated, I think it will be a game change (at least for me)

[versecafe]

@croossin would you have some time to pair on this I'd like to make it much more flexible for cross provider support and I'm not a swift dev but have been doing model routers & multi provider interfaces in production at work for a while.

[Visual-Studio-Coder]

Ay! We could add the @tabs thing where you can mention other tabs like arc browser did, and we can import skills from Dia, like I did with this extension https://www.raycast.com/Visual-Studio-Coder/dia-skills