fix: update LocalProvidersTab.tsx

[Stijnus]

Local Provider Settings Enhancement

Changes Made

• Added dynamic URL configuration support for local providers (Ollama, LMStudio, OpenAILike)
• Implemented environment variable fallbacks for provider base URLs
• Added clear UI feedback for URL configuration and model management
• Enhanced user guidance with configuration help sections

Key Improvements

1. URL Configuration

   • Now respects environment variables from .env.local
   • Provides fallback defaults if no URLs are configured
   • Added visual feedback when editing URLs
   • Settings persist across page reloads

2. Ollama Integration

   • Added restart server notifications after model changes
   • Improved error handling and user feedback
   • Clear instructions for model management
   • Dynamic base URL support for API calls

3. UI Enhancements

   • Added configuration help section with clear instructions
   • Visual indicators for URL editing state
   • Better toast messages for model operations
   • Improved error state handling

Technical Details

• Removed hardcoded URLs in favor of environment-based configuration
• Added proper type safety for provider configurations
• Improved error handling and user feedback
• Settings persistence through the application's settings store

Testing Notes

• Verify URL configuration persists after page reload
• Test model installation and deletion notifications
• Confirm environment variable overrides work as expected
• Check error handling when services are unavailable