feat: Complete implementation of Tasks 1-5 - CIM Document Processor

Backend Infrastructure:
- Complete Express server setup with security middleware (helmet, CORS, rate limiting)
- Comprehensive error handling and logging with Winston
- Authentication system with JWT tokens and session management
- Database models and migrations for Users, Documents, Feedback, and Processing Jobs
- API routes structure for authentication and document management
- Integration tests for all server components (86 tests passing)

Frontend Infrastructure:
- React application with TypeScript and Vite
- Authentication UI with login form, protected routes, and logout functionality
- Authentication context with proper async state management
- Component tests with proper async handling (25 tests passing)
- Tailwind CSS styling and responsive design

Key Features:
- User registration, login, and authentication
- Protected routes with role-based access control
- Comprehensive error handling and user feedback
- Database schema with proper relationships
- Security middleware and validation
- Production-ready build configuration

Test Coverage: 111/111 tests passing
Tasks Completed: 1-5 (Project setup, Database, Auth system, Frontend UI, Backend infrastructure)

Ready for Task 6: File upload backend infrastructure

frontend/tailwind.config.js

@@ -0,0 +1,32 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: [
+    "./index.html",
+    "./src/**/*.{js,ts,jsx,tsx}",
+  ],
+  theme: {
+    extend: {
+      colors: {
+        primary: {
+          50: '#eff6ff',
+          500: '#3b82f6',
+          600: '#2563eb',
+          700: '#1d4ed8',
+        },
+        gray: {
+          50: '#f9fafb',
+          100: '#f3f4f6',
+          200: '#e5e7eb',
+          300: '#d1d5db',
+          400: '#9ca3af',
+          500: '#6b7280',
+          600: '#4b5563',
+          700: '#374151',
+          800: '#1f2937',
+          900: '#111827',
+        },
+      },
+    },
+  },
+  plugins: [],
+}