Improvements

Enhanced OAuth/Authentication Flow

• Improved OAuth client information handling during authorization flows
• Better support for dynamic OAuth client registration
• Enhanced client metadata persistence when exchanging authorization codes
• More robust handling of OAuth redirect URLs with proper client ID parameters

Error Handling Enhancements

• Added validation for server capability requirements:
• Prompts support verification for MCP servers
• Proper error messages when servers don't support required features
• Better error reporting for incompatible authentication servers
• Improved validation for OAuth response types and code challenge methods