feat: Add form validation for pool parameters

[rafamiziara]

Description

Implement comprehensive client-side and server-side validation for pool creation parameters to ensure data integrity and security.

Acceptance Criteria

• Add client-side form validation
• Implement real-time validation feedback
• Create server-side validation in Cloud Functions
• Add custom validation rules for pool parameters
• Implement async validation for uniqueness checks
• Add validation error handling and display
• Create validation test suite

Technical Requirements

• Use form validation library (React Hook Form or similar)
• Implement custom validation hooks
• Add TypeScript interfaces for validation schemas
• Include regex patterns for input validation
• Support for async validation calls
• Internationalization support for error messages

Validation Rules

Pool Name

• Required field
• Minimum 3, maximum 50 characters
• Alphanumeric and spaces only
• Uniqueness check against existing pools
• No profanity or reserved words

Pool Description

• Required field
• Minimum 10, maximum 500 characters
• Basic HTML sanitization
• Content appropriateness check

Token Address (ERC20)

• Valid Ethereum address format
• Contract existence verification
• ERC20 standard compliance check
• Not on blacklisted tokens

Financial Parameters

• Interest rate within allowed ranges
• Loan terms within reasonable limits
• Minimum/maximum amounts validation
• Percentage calculations accuracy

User Experience

• Real-time validation feedback
• Clear error message display
• Field-level validation indicators
• Form submission prevention when invalid
• Helpful validation hints and examples

Definition of Done

• All form fields have proper validation
• Real-time validation feedback works
• Server-side validation prevents invalid data
• Comprehensive validation test coverage
• User-friendly error messages
• Validation documentation complete

[rafamiziara]

Closing in favor of updated task breakdown based on comprehensive Pool Creation Architecture. New issues will be created with more detailed implementation plan.