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/DashboardPage.tsx

@@ -0,0 +1,154 @@
+/**
+ * Dashboard Page - Placeholder for Phase 4
+ */
+
+import React from 'react';
+import {
+  Box,
+  Heading,
+  Text,
+  Container,
+  VStack,
+  Badge,
+  Card,
+  CardBody,
+  SimpleGrid,
+  Button,
+  Alert,
+  AlertIcon,
+} from '@chakra-ui/react';
+import { Link as RouterLink } from 'react-router-dom';
+import { useAuth } from '../contexts/AuthContext';
+
+export function DashboardPage() {
+  const { isAuthenticated } = useAuth();
+
+  if (!isAuthenticated) {
+    return (
+      <Container maxW="md">
+        <VStack spacing={6}>
+          <Alert status="warning">
+            <AlertIcon />
+            Please sign in to access your dashboard
+          </Alert>
+          <Button as={RouterLink} to="/login" colorScheme="brand">
+            Sign In
+          </Button>
+        </VStack>
+      </Container>
+    );
+  }
+
+  return (
+    <Container maxW="6xl">
+      <VStack spacing={8}>
+        <Box textAlign="center">
+          <Heading as="h1" size="xl" mb={4}>
+            Dashboard
+          </Heading>
+          <Text fontSize="lg" color="gray.600">
+            Your redirect tracking and analysis overview
+          </Text>
+          <Badge colorScheme="yellow" mt={2}>
+            Dashboard UI coming in Phase 4 Complete
+          </Badge>
+        </Box>
+
+        <SimpleGrid columns={{ base: 1, md: 2, lg: 3 }} spacing={6} w="full">
+          <Card>
+            <CardBody textAlign="center">
+              <Heading as="h3" size="md" mb={4}>
+                📊 Recent Checks
+              </Heading>
+              <Text color="gray.600" mb={4}>
+                View your latest redirect tracking results
+              </Text>
+              <Button size="sm" variant="outline" disabled>
+                Coming Soon
+              </Button>
+            </CardBody>
+          </Card>
+
+          <Card>
+            <CardBody textAlign="center">
+              <Heading as="h3" size="md" mb={4}>
+                📈 Analytics
+              </Heading>
+              <Text color="gray.600" mb={4}>
+                Charts and insights from your tracking data
+              </Text>
+              <Button size="sm" variant="outline" disabled>
+                Coming Soon
+              </Button>
+            </CardBody>
+          </Card>
+
+          <Card>
+            <CardBody textAlign="center">
+              <Heading as="h3" size="md" mb={4}>
+                🏢 Organizations
+              </Heading>
+              <Text color="gray.600" mb={4}>
+                Manage your teams and projects
+              </Text>
+              <Button size="sm" variant="outline" disabled>
+                Coming Soon
+              </Button>
+            </CardBody>
+          </Card>
+
+          <Card>
+            <CardBody textAlign="center">
+              <Heading as="h3" size="md" mb={4}>
+                ⚙️ Settings
+              </Heading>
+              <Text color="gray.600" mb={4}>
+                Configure your account and preferences
+              </Text>
+              <Button size="sm" variant="outline" disabled>
+                Coming Soon
+              </Button>
+            </CardBody>
+          </Card>
+
+          <Card>
+            <CardBody textAlign="center">
+              <Heading as="h3" size="md" mb={4}>
+                🔑 API Keys
+              </Heading>
+              <Text color="gray.600" mb={4}>
+                Manage programmatic access tokens
+              </Text>
+              <Button size="sm" variant="outline" disabled>
+                Coming Soon
+              </Button>
+            </CardBody>
+          </Card>
+
+          <Card>
+            <CardBody textAlign="center">
+              <Heading as="h3" size="md" mb={4}>
+                📋 Projects
+              </Heading>
+              <Text color="gray.600" mb={4}>
+                Organize your tracking checks
+              </Text>
+              <Button size="sm" variant="outline" disabled>
+                Coming Soon
+              </Button>
+            </CardBody>
+          </Card>
+        </SimpleGrid>
+
+        <Box textAlign="center">
+          <Text mb={4}>
+            All dashboard features are being built and will be available soon:
+          </Text>
+          <Button as={RouterLink} to="/track" colorScheme="brand">
+            Start Tracking URLs
+          </Button>
+        </Box>
+      </VStack>
+    </Container>
+  );
+}