🚀 Major AI Assistant & Performance Update

This is a major update to Aurora Glass, introducing a much more powerful AI Assistant experience alongside numerous stability and UI improvements.

🤖 Advanced AI Assistant Sidebar
- Added a full AI chat sidebar that can stay open while browsing any website or tab.
- Supports multiple cloud AI providers including ChatGPT, Claude, Gemini, Grok, Groq, and Azure OpenAI.
- Added support for local AI through llama.cpp, Ollama, KoboldAI, text-generation-webui, and other OpenAI-compatible local servers.
- Each provider can have its own API key and model configuration.
- The assistant can detect requests such as opening YouTube or searching for something and can open the requested result in a new browser tab.
- Auto-open actions can be enabled or disabled from the settings.
- Chat history and configuration remain stored locally in the browser.

🔐 Privacy & Security
- No developer-controlled AI proxy or backend server.
- AI requests go directly from the browser to the provider selected by the user.
- No analytics, telemetry, or tracking has been added.
- Nothing is sent automatically; network requests are triggered by user actions.
- The extension remains fully open source and is designed to work alongside privacy extensions such as uBlock Origin and Privacy Badger.
- When using cloud AI or web services, privacy and data handling are ultimately determined by the service selected by the user.

🎨 UI & Performance Improvements
- Fixed several settings controls that could sometimes fail to apply correctly, including scale and corner-radius settings.
- Improved the glass blur system and its performance.
- Fixed an issue where increasing blur could sometimes cause the wallpaper/background to become stuck or visually freeze.
- Improved sidebar styling and integration with the Aurora Glass interface.
- Improved overall stability and responsiveness.

🛠 Bug Fixes
- Fixed multiple settings synchronization and state-management issues.
- Improved reliability when switching between AI providers.
- Fixed issues that could cause saved AI configuration to become inconsistent between the new-tab page and sidebar.
- Additional small UI and stability fixes throughout the extension.

This update significantly expands Aurora Glass from a customizable new-tab experience into a privacy-first AI-powered browser workspace while keeping the project open source and user-controlled.