feat: implement Slice B - Smart Form Pre-population & Validation

[Tyrrnien81]

User Journey: "As a user, I want the eligibility form to remember my information and prevent me from skipping required fields"

Key Features Implemented

Smart Form Pre-population

• Automatic Data Loading: EligibilityForm now pre-populates with authenticated user data
• Seamless UX: Users see their name and email automatically filled from their profile
• Integration: Connected with Zustand auth store for real-time user data access

✅ Step-by-Step Validation System

• Critical Field Validation: Required field enforcement for Steps 1-3 (most important sections)
• Real-time Feedback: Validation errors clear as users type, providing immediate feedback
• Smart Navigation: Next button dynamically enables/disables based on validation state
• Visual Indicators: Red borders and error messages clearly show invalid fields

Enhanced User Experience

• Progress Tracking: Visual step completion indicators with validation status
• Error Messages: Clear, actionable error messages with AlertCircle icons
• Accessibility: Proper ARIA labels and semantic error handling
• Responsive Design: Validation UI works seamlessly across all device sizes

Technical Improvements

State Management Enhancement

• Added ValidationErrors and StepValidation TypeScript interfaces- Implemented comprehensive validateStep() function with field-specific rules
• Enhanced form state to track validation status across all steps
• Optimized re-renders with efficient validation state updates

Validation Logic

// Step-specific validation rules implemented:
Step 1: name, email, country, age (18-100 range) - REQUIRED
Step 2: educationLevel - REQUIRED  
Step 3: funding, traction - REQUIRED
Steps 4-7: Optional (no validation)

Testing Enhancements

• E2E Test Coverage: Added comprehensive validation testing scenarios
• Pre-population Testing: Verified user data auto-fill functionality
• Error State Testing: Confirmed proper error display and button state management
• Cross-browser Compatibility: Tested across Chrome, Firefox, and Safari

🐛 Critical Bug Fixes

ESLint Plugin Conflict Resolution

• Root Cause: pnpm workspace hoisting caused ESLint plugin conflicts
• Solution: Added .npmrc configuration to control package hoisting
• Impact: Eliminated console errors and improved development experience

Package Management Cleanup

• Removed conflicting package-lock.json to maintain pnpm consistency
• Updated pnpm-lock.yaml with proper dependency resolution
• Improved build stability and reduced dependency conflicts