feat(phase-4): implement modern Chakra UI frontend with comprehensive tracking interface

🎨 Modern React Frontend:
- Complete Chakra UI integration with custom theme and dark/light mode
- Responsive design with mobile-first navigation and layout
- Beautiful component library with cards, forms, and data visualization
- Professional typography and color system with brand consistency

🚀 Advanced URL Tracking Interface:
- Comprehensive tracking form with real-time validation using React Hook Form + Zod
- Advanced options panel with configurable parameters (max hops, timeout, headers)
- SSL, SEO, and security analysis toggles with user-friendly controls
- Smart URL normalization and method selection interface

📊 Rich Results Visualization:
- Interactive tracking results with hop-by-hop analysis tables
- Performance metrics with latency visualization and progress bars
- Status badges with color-coded redirect types and HTTP status codes
- Comprehensive error handling and user feedback system

🧭 Navigation & Layout:
- Responsive navigation bar with user authentication state
- Mobile-friendly drawer navigation with touch-optimized interactions
- Professional footer with feature highlights and API documentation links
- Breadcrumb navigation and page structure for optimal UX

🔐 Authentication Integration:
- Complete authentication context with JWT token management
- User registration and login flow preparation (backend ready)
- Protected routes and role-based access control framework
- Session management with automatic token refresh and error handling

🌟 User Experience Features:
- Toast notifications for all user actions and API responses
- Loading states and skeleton screens for smooth interactions
- Copy-to-clipboard functionality for tracking IDs and results
- Tooltips and help text for advanced features and configuration

📱 Responsive Design:
- Mobile-first design approach with breakpoint-aware components
- Touch-friendly interfaces with appropriate sizing and spacing
- Optimized layouts for desktop, tablet, and mobile viewports
- Accessible design with proper ARIA labels and keyboard navigation

🔧 Developer Experience:
- TypeScript throughout with comprehensive type safety
- React Query for efficient API state management and caching
- Custom hooks for authentication and API interactions
- Modular component architecture with clear separation of concerns

🎯 API Integration:
- Complete integration with all v2 API endpoints
- Real-time health monitoring and status display
- Backward compatibility with legacy API endpoints
- Comprehensive error handling with user-friendly messages

Ready for enhanced dashboard and analysis features in future phases!

apps/web/src/pages/LoginPage.tsx

@@ -0,0 +1,67 @@
+/**
+ * Login Page - Placeholder for Phase 4
+ */
+
+import React from 'react';
+import {
+  Box,
+  Heading,
+  Text,
+  Container,
+  VStack,
+  Badge,
+  Card,
+  CardBody,
+  Button,
+} from '@chakra-ui/react';
+import { Link as RouterLink } from 'react-router-dom';
+
+export function LoginPage() {
+  return (
+    <Container maxW="md">
+      <VStack spacing={8}>
+        <Box textAlign="center">
+          <Heading as="h1" size="xl" mb={4}>
+            Sign In
+          </Heading>
+          <Text color="gray.600">
+            Access your redirect tracking dashboard
+          </Text>
+          <Badge colorScheme="yellow" mt={2}>
+            Login UI coming in Phase 4
+          </Badge>
+        </Box>
+
+        <Card w="full">
+          <CardBody textAlign="center" py={8}>
+            <Text mb={6} color="gray.600">
+              The authentication system is fully implemented in the backend API. 
+              The login form UI will be completed in the next phase.
+            </Text>
+            
+            <VStack spacing={4}>
+              <Text fontSize="sm" fontWeight="medium">
+                Backend Features Ready:
+              </Text>
+              <VStack fontSize="sm" color="gray.600">
+                <Text>✅ User registration and login</Text>
+                <Text>✅ JWT token authentication</Text>
+                <Text>✅ Argon2 password hashing</Text>
+                <Text>✅ Organization management</Text>
+              </VStack>
+            </VStack>
+          </CardBody>
+        </Card>
+
+        <VStack>
+          <Button as={RouterLink} to="/track" colorScheme="brand">
+            Try Anonymous Tracking
+          </Button>
+          <Text fontSize="sm" color="gray.600">
+            or test the API directly at <Text as="span" fontFamily="mono">/api/v1/auth/login</Text>
+          </Text>
+        </VStack>
+      </VStack>
+    </Container>
+  );
+}