init

.gitignore

@@ -0,0 +1 @@
+node_modules

DEMO_SETUP.md

@@ -0,0 +1,147 @@
+# 🚀 LFG9 Forums - Demo Setup Guide
+
+**Ready to preview your LFG9 Forums application immediately!**
+
+## ✅ Current Status
+
+Your application is **ready to run** with mock data! The database setup has been bypassed with a demo mode that includes:
+
+- ✨ **Mock Authentication**: Login with any email/password
+- 🗂️ **Sample Categories**: 9 gaming categories with realistic data
+- 📝 **Mock Threads**: Sample discussions to showcase the interface
+- 🎨 **Full Dark Theme**: Complete with your custom color palette
+- 📱 **Responsive Design**: Mobile-friendly interface
+
+## 🎯 One-Step Preview
+
+**Option 1: Frontend Only (Recommended for Quick Preview)**
+
+```bash
+cd lfg9-forums/frontend
+npm install
+npm run dev
+```
+
+**Option 2: Both Frontend and Backend**
+
+```bash
+cd lfg9-forums
+npm run setup
+npm run dev
+```
+
+## 🌐 Access Your Application
+
+- **Frontend**: http://localhost:5173
+- **Backend**: http://localhost:3000 (if running both)
+
+## 🎮 Demo Features You Can Test
+
+### 1. **Authentication System**
+- Visit http://localhost:5173
+- Click "Sign Up" or "Login"
+- Use **any email and password** - it will work!
+- Experience the dark-themed forms with validation UI
+
+### 2. **Homepage Experience**
+- Beautiful gradient hero section
+- Statistics cards with gaming metrics
+- Category grid with hover effects
+- Recent activity sidebar
+
+### 3. **Categories Page**
+- Navigate to "Categories" in the header
+- Browse 9 different gaming categories
+- Test the search functionality
+- See hover animations and transitions
+
+### 4. **Rich Text Editor**
+- Visit any "Create Thread" page (requires login)
+- Experience the full TipTap editor
+- Try formatting tools, headings, lists
+- Dark theme optimized toolbar
+
+### 5. **Navigation & UI**
+- Responsive header with user menu
+- Search bar (visual only in demo)
+- Mobile-friendly hamburger menu
+- Smooth transitions throughout
+
+## 🎨 Visual Features Implemented
+
+### **Custom Dark Color Palette**
+- **Rich Black** (#0C1821): Main backgrounds
+- **Oxford Blue** (#1B2A41): Cards and secondary areas
+- **Charcoal** (#324A5F): Text and borders
+- **Lavender** (#CCC9DC): Accents and highlights
+
+### **Interactive Elements**
+- Hover animations on cards and buttons
+- Focus states with lavender accents
+- Loading animations and transitions
+- Responsive grid layouts
+
+### **Typography & Styling**
+- Inter font for clean readability
+- Proper contrast ratios for accessibility
+- Custom scrollbars matching the theme
+- Professional spacing and typography
+
+## 📱 Mobile Testing
+
+Test the responsive design:
+- Open browser developer tools
+- Toggle device view (mobile/tablet)
+- See how components adapt beautifully
+
+## 🧪 What's Working in Demo Mode
+
+✅ **Navigation**: All routing and page transitions  
+✅ **Authentication UI**: Complete login/register flow  
+✅ **Categories**: Full category browsing experience  
+✅ **Rich Text Editor**: All formatting and editing tools  
+✅ **Search Interface**: Search bars and filtering UI  
+✅ **Responsive Design**: Mobile and desktop layouts  
+✅ **Dark Theme**: Complete color system implementation  
+✅ **Animations**: Smooth transitions and hover effects  
+
+## 🔄 Converting to Production
+
+When ready to connect to real AWS services:
+
+1. **Update Auth Context**:
+```typescript
+// Change in App.tsx
+import { AuthProvider } from './contexts/AuthContext'; // Real auth
+```
+
+2. **Configure Backend**: 
+```bash
+# Set up real AWS credentials in backend/.env
+# Run database setup: npm run setup-db
+```
+
+3. **Start Both Services**:
+```bash
+npm run dev  # Runs both frontend and backend
+```
+
+## 🎯 Perfect For
+
+- **Client Demos**: Showcase the complete interface
+- **Design Review**: Evaluate the dark theme implementation
+- **User Testing**: Get feedback on UX and navigation
+- **Development**: Frontend feature development
+- **Presentation**: Show stakeholders the full experience
+
+## 💡 Next Steps After Demo
+
+1. **AWS Setup**: Configure real DynamoDB tables
+2. **Content Creation**: Add real categories and threads
+3. **File Uploads**: Test S3 image upload functionality
+4. **Admin Features**: Implement category management
+5. **Real-time Features**: Add live updates and notifications
+
+---
+
+**🎮 Your LFG9 Forums application is ready to showcase! Enjoy exploring the beautiful dark-themed gaming forum interface.**

DEPLOYMENT.md

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+# Deployment Guide
+
+Complete deployment guide for the LFG9 Forums application.
+
+## AWS Infrastructure Setup
+
+### 1. DynamoDB Tables
+
+Create the following DynamoDB tables:
+
+#### Users Table
+```bash
+aws dynamodb create-table \
+  --table-name lfg9_forums_users \
+  --attribute-definitions \
+    AttributeName=userId,AttributeType=S \
+  --key-schema \
+    AttributeName=userId,KeyType=HASH \
+  --billing-mode PAY_PER_REQUEST
+```
+
+#### Categories Table
+```bash
+aws dynamodb create-table \
+  --table-name lfg9_forums_categories \
+  --attribute-definitions \
+    AttributeName=categoryId,AttributeType=S \
+  --key-schema \
+    AttributeName=categoryId,KeyType=HASH \
+  --billing-mode PAY_PER_REQUEST
+```
+
+#### Threads Table
+```bash
+aws dynamodb create-table \
+  --table-name lfg9_forums_threads \
+  --attribute-definitions \
+    AttributeName=threadId,AttributeType=S \
+    AttributeName=categoryId,AttributeType=S \
+    AttributeName=authorId,AttributeType=S \
+  --key-schema \
+    AttributeName=threadId,KeyType=HASH \
+  --global-secondary-indexes \
+    IndexName=CategoryIdIndex,KeySchema=[{AttributeName=categoryId,KeyType=HASH}],Projection={ProjectionType=ALL} \
+    IndexName=AuthorIdIndex,KeySchema=[{AttributeName=authorId,KeyType=HASH}],Projection={ProjectionType=ALL} \
+  --billing-mode PAY_PER_REQUEST
+```
+
+#### Posts Table
+```bash
+aws dynamodb create-table \
+  --table-name lfg9_forums_posts \
+  --attribute-definitions \
+    AttributeName=postId,AttributeType=S \
+    AttributeName=threadId,AttributeType=S \
+    AttributeName=authorId,AttributeType=S \
+  --key-schema \
+    AttributeName=postId,KeyType=HASH \
+  --global-secondary-indexes \
+    IndexName=ThreadIdIndex,KeySchema=[{AttributeName=threadId,KeyType=HASH}],Projection={ProjectionType=ALL} \
+    IndexName=AuthorIdIndex,KeySchema=[{AttributeName=authorId,KeyType=HASH}],Projection={ProjectionType=ALL} \
+  --billing-mode PAY_PER_REQUEST
+```
+
+#### Files Table
+```bash
+aws dynamodb create-table \
+  --table-name lfg9_forums_files \
+  --attribute-definitions \
+    AttributeName=fileId,AttributeType=S \
+    AttributeName=userId,AttributeType=S \
+  --key-schema \
+    AttributeName=fileId,KeyType=HASH \
+  --global-secondary-indexes \
+    IndexName=UserIdIndex,KeySchema=[{AttributeName=userId,KeyType=HASH}],Projection={ProjectionType=ALL} \
+  --billing-mode PAY_PER_REQUEST
+```
+
+### 2. S3 Bucket Setup
+
+Create S3 bucket for file uploads:
+
+```bash
+aws s3 mb s3://lfg9-forums-uploads --region us-east-1
+```
+
+Configure bucket policy for proper access:
+
+```json
+{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Sid": "PublicReadGetObject",
+      "Effect": "Allow",
+      "Principal": "*",
+      "Action": "s3:GetObject",
+      "Resource": "arn:aws:s3:::lfg9-forums-uploads/*"
+    }
+  ]
+}
+```
+
+Configure CORS for the bucket:
+
+```json
+[
+  {
+    "AllowedHeaders": ["*"],
+    "AllowedMethods": ["GET", "PUT", "POST", "DELETE"],
+    "AllowedOrigins": ["https://yourdomain.com"],
+    "ExposeHeaders": ["ETag"]
+  }
+]
+```
+
+### 3. IAM Role and Policies
+
+Create IAM role for the application:
+
+```json
+{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Effect": "Allow",
+      "Action": [
+        "dynamodb:GetItem",
+        "dynamodb:PutItem",
+        "dynamodb:Query",
+        "dynamodb:Scan",
+        "dynamodb:UpdateItem",
+        "dynamodb:DeleteItem"
+      ],
+      "Resource": [
+        "arn:aws:dynamodb:*:*:table/lfg9_forums_*",
+        "arn:aws:dynamodb:*:*:table/lfg9_forums_*/index/*"
+      ]
+    },
+    {
+      "Effect": "Allow",
+      "Action": [
+        "s3:GetObject",
+        "s3:PutObject",
+        "s3:DeleteObject",
+        "s3:PutObjectAcl"
+      ],
+      "Resource": "arn:aws:s3:::lfg9-forums-uploads/*"
+    },
+    {
+      "Effect": "Allow",
+      "Action": [
+        "s3:ListBucket"
+      ],
+      "Resource": "arn:aws:s3:::lfg9-forums-uploads"
+    }
+  ]
+}
+```
+
+## Backend Deployment
+
+### Option 1: AWS ECS with Fargate
+
+1. **Create Dockerfile**:
+
+```dockerfile
+FROM node:18-alpine
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci --only=production
+
+COPY dist ./dist
+
+EXPOSE 3000
+
+CMD ["npm", "start"]
+```
+
+2. **Build and push to ECR**:
+
+```bash
+# Build the application
+npm run build
+
+# Build Docker image
+docker build -t lfg9-forums-backend .
+
+# Tag and push to ECR
+aws ecr get-login-password --region us-east-1 | docker login --username AWS --password-stdin 123456789012.dkr.ecr.us-east-1.amazonaws.com
+docker tag lfg9-forums-backend:latest 123456789012.dkr.ecr.us-east-1.amazonaws.com/lfg9-forums-backend:latest
+docker push 123456789012.dkr.ecr.us-east-1.amazonaws.com/lfg9-forums-backend:latest
+```
+
+3. **Create ECS Task Definition**:
+
+```json
+{
+  "family": "lfg9-forums-backend",
+  "networkMode": "awsvpc",
+  "requiresCompatibilities": ["FARGATE"],
+  "cpu": "512",
+  "memory": "1024",
+  "executionRoleArn": "arn:aws:iam::123456789012:role/ecsTaskExecutionRole",
+  "taskRoleArn": "arn:aws:iam::123456789012:role/lfg9-forums-task-role",
+  "containerDefinitions": [
+    {
+      "name": "lfg9-forums-backend",
+      "image": "123456789012.dkr.ecr.us-east-1.amazonaws.com/lfg9-forums-backend:latest",
+      "portMappings": [
+        {
+          "containerPort": 3000,
+          "protocol": "tcp"
+        }
+      ],
+      "environment": [
+        {
+          "name": "NODE_ENV",
+          "value": "production"
+        },
+        {
+          "name": "PORT",
+          "value": "3000"
+        }
+      ],
+      "secrets": [
+        {
+          "name": "JWT_SECRET",
+          "valueFrom": "arn:aws:secretsmanager:us-east-1:123456789012:secret:lfg9-forums/jwt-secret"
+        }
+      ],
+      "logConfiguration": {
+        "logDriver": "awslogs",
+        "options": {
+          "awslogs-group": "/ecs/lfg9-forums-backend",
+          "awslogs-region": "us-east-1",
+          "awslogs-stream-prefix": "ecs"
+        }
+      }
+    }
+  ]
+}
+```
+
+### Option 2: AWS Lambda with Serverless Framework
+
+1. **Install Serverless Framework**:
+
+```bash
+npm install -g serverless
+npm install --save-dev serverless-offline
+```
+
+2. **Create serverless.yml**:
+
+```yaml
+service: lfg9-forums-backend
+
+provider:
+  name: aws
+  runtime: nodejs18.x
+  region: us-east-1
+  environment:
+    NODE_ENV: production
+    DYNAMODB_TABLE_PREFIX: ${self:service}-${opt:stage, self:provider.stage}-
+    S3_BUCKET_NAME: lfg9-forums-uploads-${opt:stage, self:provider.stage}
+  iamRoleStatements:
+    - Effect: Allow
+      Action:
+        - dynamodb:Query
+        - dynamodb:Scan
+        - dynamodb:GetItem
+        - dynamodb:PutItem
+        - dynamodb:UpdateItem
+        - dynamodb:DeleteItem
+      Resource: "arn:aws:dynamodb:${self:provider.region}:*:table/${self:service}-${opt:stage, self:provider.stage}-*"
+    - Effect: Allow
+      Action:
+        - s3:GetObject
+        - s3:PutObject
+        - s3:DeleteObject
+      Resource: "arn:aws:s3:::lfg9-forums-uploads-${opt:stage, self:provider.stage}/*"
+
+functions:
+  api:
+    handler: dist/lambda.handler
+    events:
+      - http:
+          path: /{proxy+}
+          method: ANY
+          cors: true
+
+plugins:
+  - serverless-offline
+```
+
+## Frontend Deployment
+
+### Option 1: AWS S3 + CloudFront
+
+1. **Build the frontend**:
+
+```bash
+cd frontend
+npm run build
+```
+
+2. **Create S3 bucket for hosting**:
+
+```bash
+aws s3 mb s3://lfg9-forums-frontend --region us-east-1
+```
+
+3. **Configure bucket for static website hosting**:
+
+```bash
+aws s3 website s3://lfg9-forums-frontend --index-document index.html --error-document index.html
+```
+
+4. **Upload build files**:
+
+```bash
+aws s3 sync dist/ s3://lfg9-forums-frontend --delete
+```
+
+5. **Create CloudFront distribution**:
+
+```json
+{
+  "DistributionConfig": {
+    "CallerReference": "lfg9-forums-frontend-2024",
+    "Comment": "LFG9 Forums Frontend Distribution",
+    "DefaultCacheBehavior": {
+      "TargetOriginId": "S3-lfg9-forums-frontend",
+      "ViewerProtocolPolicy": "redirect-to-https",
+      "TrustedSigners": {
+        "Enabled": false,
+        "Quantity": 0
+      },
+      "ForwardedValues": {
+        "QueryString": false,
+        "Cookies": {
+          "Forward": "none"
+        }
+      },
+      "MinTTL": 0
+    },
+    "Origins": {
+      "Quantity": 1,
+      "Items": [
+        {
+          "Id": "S3-lfg9-forums-frontend",
+          "DomainName": "lfg9-forums-frontend.s3.amazonaws.com",
+          "S3OriginConfig": {
+            "OriginAccessIdentity": ""
+          }
+        }
+      ]
+    },
+    "Enabled": true,
+    "PriceClass": "PriceClass_All"
+  }
+}
+```
+
+### Option 2: Netlify Deployment
+
+1. **Create netlify.toml**:
+
+```toml
+[build]
+  command = "npm run build"
+  publish = "dist"
+
+[[redirects]]
+  from = "/*"
+  to = "/index.html"
+  status = 200
+
+[build.environment]
+  VITE_API_URL = "https://api.yourdomain.com"
+```
+
+2. **Deploy via Netlify CLI**:
+
+```bash
+npm install -g netlify-cli
+netlify login
+netlify deploy --prod --dir=dist
+```
+
+## Environment Configuration
+
+### Production Environment Variables
+
+#### Backend (.env)
+```env
+NODE_ENV=production
+PORT=3000
+JWT_SECRET=your-production-jwt-secret
+JWT_EXPIRES_IN=7d
+AWS_REGION=us-east-1
+DYNAMODB_TABLE_PREFIX=lfg9_forums_
+S3_BUCKET_NAME=lfg9-forums-uploads
+RATE_LIMIT_WINDOW_MS=900000
+RATE_LIMIT_MAX_REQUESTS=100
+MAX_FILE_SIZE=10485760
+MAX_FILES_PER_USER=100
+CORS_ORIGIN=https://yourdomain.com
+```
+
+#### Frontend (.env.production)
+```env
+VITE_API_URL=https://api.yourdomain.com
+VITE_WS_URL=wss://api.yourdomain.com
+```
+
+## SSL/TLS Configuration
+
+### AWS Certificate Manager
+
+1. **Request SSL certificate**:
+
+```bash
+aws acm request-certificate \
+  --domain-name yourdomain.com \
+  --subject-alternative-names "*.yourdomain.com" \
+  --validation-method DNS
+```
+
+2. **Validate certificate** through DNS validation
+
+3. **Update CloudFront and ALB** to use the certificate
+
+## Monitoring and Logging
+
+### CloudWatch Setup
+
+1. **Create log groups**:
+
+```bash
+aws logs create-log-group --log-group-name /aws/ecs/lfg9-forums-backend
+aws logs create-log-group --log-group-name /aws/lambda/lfg9-forums-backend
+```
+
+2. **Set up CloudWatch dashboards** for monitoring:
+   - API response times
+   - Error rates
+   - DynamoDB read/write capacity
+   - S3 upload metrics
+
+### Health Checks
+
+Configure health checks for:
+- Backend API endpoint (`/health`)
+- Database connectivity
+- S3 access
+
+## Security Checklist
+
+- [ ] Enable AWS WAF on CloudFront
+- [ ] Configure proper CORS origins
+- [ ] Use HTTPS everywhere
+- [ ] Enable DynamoDB encryption at rest
+- [ ] Configure S3 bucket policies correctly
+- [ ] Use AWS Secrets Manager for sensitive data
+- [ ] Enable CloudTrail for API logging
+- [ ] Configure proper IAM roles and policies
+- [ ] Enable MFA for AWS root account
+- [ ] Regularly rotate JWT secrets
+
+## Performance Optimization
+
+1. **Enable CloudFront caching** for static assets
+2. **Configure DynamoDB auto-scaling**
+3. **Use S3 Transfer Acceleration** for file uploads
+4. **Enable gzip compression** on CloudFront
+5. **Implement CDN** for global content delivery
+6. **Monitor and optimize** database queries
+
+## Backup and Disaster Recovery
+
+1. **Enable DynamoDB point-in-time recovery**
+2. **Configure S3 cross-region replication**
+3. **Regular database backups**
+4. **Test disaster recovery procedures**
+
+## Maintenance
+
+1. **Regular security updates**
+2. **Monitor AWS service limits**
+3. **Review and optimize costs**
+4. **Update dependencies regularly**
+5. **Monitor application performance**

QUICK_START.md

@@ -0,0 +1,145 @@
+# 🚀 Quick Start Guide
+
+Get your LFG9 Forums testing environment running in minutes!
+
+## Prerequisites
+
+- Node.js 18+ installed
+- AWS credentials configured (already done ✅)
+- Internet connection
+
+## Quick Setup (5 minutes)
+
+### 1. Install Dependencies
+
+```bash
+# Navigate to project root
+cd lfg9-forums
+
+# Install all dependencies for both frontend and backend
+npm run setup
+```
+
+### 2. Set Up Database Tables
+
+```bash
+# Create DynamoDB tables in AWS
+npm run setup-db
+```
+
+### 3. Start Development Servers
+
+```bash
+# Start both frontend and backend servers
+npm run dev
+```
+
+This will start:
+- **Backend API**: http://localhost:3000
+- **Frontend App**: http://localhost:5173
+
+## 🎯 What You'll See
+
+1. **Homepage**: Beautiful dark-themed landing page
+2. **Authentication**: Login/Register with the dark UI
+3. **Categories**: Forum categories listing
+4. **Rich Text Editor**: TipTap editor with all formatting options
+
+## 🔧 Manual Setup (Alternative)
+
+If the quick setup doesn't work, you can start services individually:
+
+### Backend
+
+```bash
+cd backend
+npm install
+npm run dev
+```
+
+### Frontend  
+
+```bash
+cd frontend  
+npm install
+npm run dev
+```
+
+## 📊 Test the Application
+
+1. **Visit**: http://localhost:5173
+2. **Register**: Create a new account
+3. **Browse**: Check out the categories page
+4. **Experience**: The dark theme and rich text editor
+
+## 🛠️ Troubleshooting
+
+### DynamoDB Connection Issues
+
+If tables don't create automatically:
+
+```bash
+# Verify AWS credentials
+aws sts get-caller-identity
+
+# Manually create tables
+node setup-dev-tables.js
+```
+
+### Port Conflicts
+
+If ports 3000 or 5173 are in use:
+
+**Backend (.env)**:
+```
+PORT=3001
+```
+
+**Frontend**: Vite will auto-detect and suggest alternative ports
+
+### CORS Issues
+
+Make sure the CORS origin in `backend/.env` matches your frontend URL:
+```
+CORS_ORIGIN=http://localhost:5173
+```
+
+## 🎨 Features to Test
+
+- ✅ **Dark Theme**: Custom color palette throughout
+- ✅ **Authentication**: Register/Login system  
+- ✅ **Responsive Design**: Test on mobile/tablet
+- ✅ **Rich Text Editor**: Try all formatting options
+- ✅ **Navigation**: Header menu and routing
+- ✅ **Error Handling**: See validation messages
+
+## 🔄 Development Workflow
+
+1. **Backend changes**: Auto-restart with nodemon
+2. **Frontend changes**: Hot module reload with Vite
+3. **Database**: Tables persist in AWS DynamoDB
+4. **Files**: S3 bucket for file uploads
+
+## 📁 Important URLs
+
+- **Frontend**: http://localhost:5173
+- **Backend API**: http://localhost:3000
+- **Health Check**: http://localhost:3000/health
+- **AWS Console**: https://console.aws.amazon.com/dynamodb/
+
+## ⚡ Next Steps
+
+1. **Create Categories**: Add forum categories (admin required)
+2. **Post Content**: Test the rich text editor
+3. **Upload Images**: Try file uploads to S3
+4. **Mobile Testing**: Check responsive design
+5. **Customize**: Modify colors or add features
+
+## 🆘 Need Help?
+
+- Check browser console for errors
+- Verify AWS credentials and permissions
+- Ensure all dependencies installed correctly
+- Look at the server logs for API issues
+
+**Enjoy testing your LFG9 Forums application! 🎮✨**

README.md

@@ -0,0 +1,82 @@
+# LFG9 Forums
+
+A modern, full-stack forum application built with React, TypeScript, Node.js, and AWS services.
+
+## Features
+
+- **Rich Text Editor**: Full-featured text editor with image upload, formatting, and mentions
+- **Dark Theme Design**: Custom color palette optimized for readability
+- **Real-time Discussions**: Threaded conversations with nested replies
+- **File Management**: Image upload and storage with AWS S3
+- **User Authentication**: JWT-based secure authentication
+- **Responsive Design**: Mobile-friendly interface with Tailwind CSS
+
+## Color Palette
+
+- Primary Black: `#000000`
+- Rich Black: `#0C1821` (backgrounds, cards)
+- Oxford Blue: `#1B2A41` (secondary backgrounds, borders)
+- Charcoal: `#324A5F` (text, inactive elements)
+- Lavender: `#CCC9DC` (accent, highlights, active states)
+
+## Project Structure
+
+```
+lfg9-forums/
+├── frontend/          # React TypeScript frontend
+├── backend/           # Node.js Express backend
+└── README.md
+```
+
+## Quick Start
+
+### Frontend Setup
+
+```bash
+cd frontend
+npm install
+npm run dev
+```
+
+### Backend Setup
+
+```bash
+cd backend
+npm install
+npm run dev
+```
+
+## Environment Variables
+
+Create `.env` files in both frontend and backend directories with the required configurations.
+
+See individual README files in each directory for detailed setup instructions.
+
+## Technologies Used
+
+### Frontend
+- React 18+ with TypeScript
+- React Router v6
+- Tailwind CSS
+- TipTap Rich Text Editor
+- AWS SDK for file uploads
+
+### Backend
+- Node.js with Express
+- TypeScript
+- AWS DynamoDB
+- AWS S3
+- JWT Authentication
+- bcrypt for password hashing
+
+## Contributing
+
+1. Fork the repository
+2. Create a feature branch
+3. Make your changes
+4. Test thoroughly
+5. Submit a pull request
+
+## License
+
+MIT License

backend/.env

@@ -0,0 +1,30 @@
+# Server Configuration
+PORT=3000
+NODE_ENV=development
+
+# JWT Configuration
+JWT_SECRET=ba666fe9749a19060f1d6dcf1c37f56a5cd2ca0e9207ff51efa457fd80b8333295b2610c7a440e75b202be49cd8b238281b1817fdc830877846384cd9af315ce
+JWT_EXPIRES_IN=7d
+
+# AWS Configuration
+AWS_REGION=us-east-1
+AWS_ACCESS_KEY_ID=AKIAY2ZG3TZB7LZNBMNE
+AWS_SECRET_ACCESS_KEY=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
+
+# DynamoDB Configuration
+DYNAMODB_TABLE_PREFIX=lfg9_forums_dev_
+
+# S3 Configuration
+S3_BUCKET_NAME=lfg9-forums-uploads
+S3_REGION=us-east-1
+
+# Rate Limiting
+RATE_LIMIT_WINDOW_MS=900000
+RATE_LIMIT_MAX_REQUESTS=100
+
+# File Upload Limits
+MAX_FILE_SIZE=10485760
+MAX_FILES_PER_USER=100
+
+# CORS Configuration
+CORS_ORIGIN=http://localhost:5174

backend/README.md

@@ -0,0 +1,264 @@
+# LFG9 Forums - Backend
+
+A robust Node.js backend for the LFG9 Forums application with TypeScript, Express, AWS DynamoDB, and S3 integration.
+
+## Features
+
+- **RESTful API**: Express.js with TypeScript
+- **Database**: AWS DynamoDB with efficient queries and indexes
+- **File Storage**: AWS S3 with image optimization and multiple sizes
+- **Authentication**: JWT-based secure authentication
+- **Rich Content**: JSON-based rich text content storage
+- **Security**: Input validation, rate limiting, and content sanitization
+- **Scalable**: Cloud-ready architecture with AWS services
+
+## Technologies
+
+- Node.js with Express.js
+- TypeScript for type safety
+- AWS DynamoDB for data storage
+- AWS S3 for file storage
+- JWT for authentication
+- bcrypt for password hashing
+- Sharp for image processing
+- Joi for input validation
+
+## Getting Started
+
+### Prerequisites
+
+- Node.js 18+
+- AWS Account with DynamoDB and S3 access
+- AWS CLI configured or environment variables set
+
+### Installation
+
+```bash
+# Install dependencies
+npm install
+
+# Build the project
+npm run build
+
+# Start development server
+npm run dev
+
+# Start production server
+npm start
+```
+
+### Environment Variables
+
+Create a `.env` file in the backend directory:
+
+```env
+# Server Configuration
+PORT=3000
+NODE_ENV=development
+
+# JWT Configuration
+JWT_SECRET=your-super-secret-jwt-key-here
+JWT_EXPIRES_IN=7d
+
+# AWS Configuration
+AWS_REGION=us-east-1
+AWS_ACCESS_KEY_ID=your-aws-access-key-id
+AWS_SECRET_ACCESS_KEY=your-aws-secret-access-key
+
+# DynamoDB Configuration
+DYNAMODB_TABLE_PREFIX=lfg9_forums_
+
+# S3 Configuration
+S3_BUCKET_NAME=lfg9-forums-uploads
+S3_REGION=us-east-1
+
+# Rate Limiting
+RATE_LIMIT_WINDOW_MS=900000
+RATE_LIMIT_MAX_REQUESTS=100
+
+# File Upload Limits
+MAX_FILE_SIZE=10485760
+MAX_FILES_PER_USER=100
+
+# CORS Configuration
+CORS_ORIGIN=http://localhost:5173
+```
+
+## Database Schema
+
+### DynamoDB Tables
+
+#### Users Table
+- **Primary Key**: userId (String)
+- **Attributes**: username, email, passwordHash, createdAt, updatedAt, profileInfo, storageQuotaUsed, isAdmin
+
+#### Categories Table
+- **Primary Key**: categoryId (String)
+- **Attributes**: name, description, createdAt, updatedAt, threadCount, lastActivity
+
+#### Threads Table
+- **Primary Key**: threadId (String)
+- **GSI**: CategoryIdIndex (categoryId)
+- **Attributes**: categoryId, title, richContent, authorId, authorUsername, createdAt, updatedAt, attachedFiles, postCount, lastPostAt, isLocked, isPinned
+
+#### Posts Table
+- **Primary Key**: postId (String)
+- **GSI**: ThreadIdIndex (threadId), AuthorIdIndex (authorId)
+- **Attributes**: threadId, richContent, authorId, authorUsername, createdAt, updatedAt, parentPostId, attachedFiles, isEdited, editedAt
+
+#### Files Table
+- **Primary Key**: fileId (String)
+- **GSI**: UserIdIndex (userId)
+- **Attributes**: userId, fileName, fileType, fileSize, s3Key, threadId, postId, uploadDate, thumbnailKey, mediumKey, altText
+
+## API Endpoints
+
+### Authentication
+- `POST /api/auth/register` - User registration
+- `POST /api/auth/login` - User login
+- `POST /api/auth/logout` - User logout
+- `GET /api/auth/me` - Get current user info
+
+### Categories
+- `GET /api/categories` - List all categories
+- `POST /api/categories` - Create new category (admin only)
+- `GET /api/categories/:id` - Get category by ID
+- `PUT /api/categories/:id` - Update category (admin only)
+- `DELETE /api/categories/:id` - Delete category (admin only)
+
+### Threads
+- `GET /api/threads` - List threads with filters
+- `POST /api/threads` - Create new thread
+- `GET /api/threads/:id` - Get thread by ID
+- `PUT /api/threads/:id` - Update thread (author/admin only)
+- `DELETE /api/threads/:id` - Delete thread (author/admin only)
+- `GET /api/categories/:id/threads` - Get threads in category
+
+### Posts
+- `GET /api/threads/:id/posts` - Get posts in thread
+- `POST /api/threads/:id/posts` - Create new post
+- `GET /api/posts/:id` - Get post by ID
+- `PUT /api/posts/:id` - Update post (author/admin only)
+- `DELETE /api/posts/:id` - Delete post (author/admin only)
+
+### Files
+- `POST /api/files/upload` - Upload file
+- `GET /api/files/:id` - Get file metadata
+- `DELETE /api/files/:id` - Delete file (owner/admin only)
+- `POST /api/files/presigned-url` - Get presigned upload URL
+
+### Search
+- `GET /api/search/threads` - Search threads
+- `GET /api/search/posts` - Search posts
+
+## Rich Content Structure
+
+Rich content is stored as JSON following the TipTap/ProseMirror schema:
+
+```json
+{
+  "type": "doc",
+  "content": [
+    {
+      "type": "paragraph",
+      "content": [
+        {
+          "type": "text",
+          "text": "Hello world!",
+          "marks": [
+            {
+              "type": "bold"
+            }
+          ]
+        }
+      ]
+    }
+  ]
+}
+```
+
+## File Upload Process
+
+1. Client requests presigned upload URL
+2. Server generates presigned URL for S3
+3. Client uploads file directly to S3
+4. Server processes and optimizes images (thumbnail, medium, full size)
+5. File metadata stored in DynamoDB
+
+## Security Features
+
+- JWT token authentication
+- Password hashing with bcrypt
+- Input validation with Joi
+- Rate limiting per user and IP
+- Content sanitization for rich text
+- File type and size validation
+- Secure S3 bucket configuration
+- CORS protection
+
+## Error Handling
+
+Centralized error handling with consistent API responses:
+
+```json
+{
+  "success": false,
+  "error": "Error message",
+  "code": "ERROR_CODE",
+  "details": []
+}
+```
+
+## Development
+
+### Scripts
+- `npm run dev` - Start development server with nodemon
+- `npm run build` - Compile TypeScript
+- `npm start` - Start production server
+- `npm run clean` - Remove build files
+
+### Project Structure
+
+```
+src/
+├── config/           # Configuration files
+├── controllers/      # Route handlers
+├── middleware/       # Express middleware
+├── models/          # Database models
+├── routes/          # API routes
+├── services/        # Business logic services
+├── types/           # TypeScript interfaces
+├── utils/           # Utility functions
+└── index.ts         # Application entry point
+```
+
+## Deployment
+
+### AWS Resources Required
+
+1. **DynamoDB Tables**: Create tables with proper indexes
+2. **S3 Bucket**: Configure for file uploads with proper permissions
+3. **IAM Role**: Create role with DynamoDB and S3 permissions
+4. **EC2/ECS**: For hosting the application
+
+### Environment Setup
+
+1. Set all required environment variables
+2. Ensure AWS credentials are properly configured
+3. Create DynamoDB tables with appropriate indexes
+4. Configure S3 bucket with CORS and permissions
+
+## Monitoring and Logging
+
+- Structured logging with Winston (recommended)
+- Health check endpoint at `/health`
+- Request logging with Morgan
+- Error tracking and monitoring
+
+## Performance Considerations
+
+- DynamoDB query optimization with proper indexes
+- S3 image optimization and CDN integration
+- Caching strategies for frequent queries
+- Connection pooling and resource management
+- Rate limiting to prevent abuse

backend/package.json

@@ -0,0 +1,52 @@
+{
+  "name": "backend",
+  "version": "1.0.0",
+  "description": "",
+  "main": "dist/index.js",
+  "scripts": {
+    "build": "tsc",
+    "start": "node dist/index.js",
+    "dev": "nodemon src/index.ts",
+    "clean": "rm -rf dist",
+    "prebuild": "npm run clean",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "commonjs",
+  "dependencies": {
+    "@aws-sdk/client-dynamodb": "^3.879.0",
+    "@aws-sdk/client-s3": "^3.879.0",
+    "@aws-sdk/lib-dynamodb": "^3.879.0",
+    "@aws-sdk/s3-request-presigner": "^3.879.0",
+    "bcrypt": "^6.0.0",
+    "compression": "^1.8.1",
+    "cors": "^2.8.5",
+    "dompurify": "^3.2.6",
+    "express": "^5.1.0",
+    "express-rate-limit": "^8.0.1",
+    "helmet": "^8.1.0",
+    "joi": "^18.0.1",
+    "jsonwebtoken": "^9.0.2",
+    "morgan": "^1.10.1",
+    "multer": "^2.0.2",
+    "sharp": "^0.34.3",
+    "uuid": "^11.1.0"
+  },
+  "devDependencies": {
+    "@types/bcrypt": "^6.0.0",
+    "@types/compression": "^1.8.1",
+    "@types/cors": "^2.8.19",
+    "@types/express": "^5.0.3",
+    "@types/jsonwebtoken": "^9.0.10",
+    "@types/morgan": "^1.9.10",
+    "@types/multer": "^2.0.0",
+    "@types/node": "^24.3.0",
+    "@types/uuid": "^10.0.0",
+    "concurrently": "^9.2.1",
+    "nodemon": "^3.1.10",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.9.2"
+  }
+}

backend/src/config/database.ts

@@ -0,0 +1,28 @@
+import { DynamoDBClient } from '@aws-sdk/client-dynamodb';
+import { DynamoDBDocumentClient } from '@aws-sdk/lib-dynamodb';
+
+const client = new DynamoDBClient({
+  region: process.env.AWS_REGION || 'us-east-1',
+  credentials: {
+    accessKeyId: process.env.AWS_ACCESS_KEY_ID!,
+    secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY!,
+  },
+});
+
+export const dynamoDbClient = DynamoDBDocumentClient.from(client);
+
+export const TableNames = {
+  Users: `${process.env.DYNAMODB_TABLE_PREFIX || 'lfg9_forums_'}users`,
+  Categories: `${process.env.DYNAMODB_TABLE_PREFIX || 'lfg9_forums_'}categories`,
+  Threads: `${process.env.DYNAMODB_TABLE_PREFIX || 'lfg9_forums_'}threads`,
+  Posts: `${process.env.DYNAMODB_TABLE_PREFIX || 'lfg9_forums_'}posts`,
+  Files: `${process.env.DYNAMODB_TABLE_PREFIX || 'lfg9_forums_'}files`,
+};
+
+export const GSINames = {
+  CategoryThreads: 'CategoryIdIndex',
+  ThreadPosts: 'ThreadIdIndex',
+  UserFiles: 'UserIdIndex',
+  UserPosts: 'AuthorIdIndex',
+  UserThreads: 'AuthorIdIndex',
+};

backend/src/config/index.ts

@@ -0,0 +1,22 @@
+export const config = {
+  port: parseInt(process.env.PORT || '3000', 10),
+  nodeEnv: process.env.NODE_ENV || 'development',
+  jwtSecret: process.env.JWT_SECRET || 'your-fallback-secret',
+  jwtExpiresIn: process.env.JWT_EXPIRES_IN || '7d',
+  corsOrigin: process.env.CORS_ORIGIN || 'http://localhost:5173',
+  
+  rateLimit: {
+    windowMs: parseInt(process.env.RATE_LIMIT_WINDOW_MS || '900000', 10), // 15 minutes
+    maxRequests: parseInt(process.env.RATE_LIMIT_MAX_REQUESTS || '100', 10),
+  },
+  
+  fileUpload: {
+    maxFileSize: parseInt(process.env.MAX_FILE_SIZE || '10485760', 10), // 10MB
+    maxFilesPerUser: parseInt(process.env.MAX_FILES_PER_USER || '100', 10),
+    allowedImageTypes: ['image/jpeg', 'image/png', 'image/gif', 'image/webp'],
+    allowedDocumentTypes: ['application/pdf', 'text/plain'],
+  },
+  
+  isDevelopment: process.env.NODE_ENV === 'development',
+  isProduction: process.env.NODE_ENV === 'production',
+} as const;

backend/src/config/s3.ts

@@ -0,0 +1,18 @@
+import { S3Client } from '@aws-sdk/client-s3';
+
+export const s3Client = new S3Client({
+  region: process.env.S3_REGION || process.env.AWS_REGION || 'us-east-1',
+  credentials: {
+    accessKeyId: process.env.AWS_ACCESS_KEY_ID!,
+    secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY!,
+  },
+});
+
+export const S3_BUCKET_NAME = process.env.S3_BUCKET_NAME || 'lfg9-forums-uploads';
+
+export const S3_FOLDERS = {
+  images: 'images/',
+  thumbnails: 'thumbnails/',
+  medium: 'medium/',
+  documents: 'documents/',
+};

backend/src/index.ts

@@ -0,0 +1,63 @@
+import express from 'express';
+import cors from 'cors';
+import helmet from 'helmet';
+import morgan from 'morgan';
+import compression from 'compression';
+import rateLimit from 'express-rate-limit';
+import { config } from './config';
+import { errorHandler } from './middleware/errorHandler';
+
+const app = express();
+
+const limiter = rateLimit({
+  windowMs: config.rateLimit.windowMs,
+  max: config.rateLimit.maxRequests,
+  message: {
+    error: 'Too many requests from this IP, please try again later.',
+  },
+});
+
+app.use(helmet({
+  contentSecurityPolicy: {
+    directives: {
+      defaultSrc: ["'self'"],
+      styleSrc: ["'self'", "'unsafe-inline'", "fonts.googleapis.com"],
+      fontSrc: ["'self'", "fonts.gstatic.com"],
+      imgSrc: ["'self'", "data:", "https:"],
+      scriptSrc: ["'self'"],
+      connectSrc: ["'self'", "https:"],
+    },
+  },
+}));
+
+app.use(cors({
+  origin: config.corsOrigin,
+  credentials: true,
+  methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'],
+  allowedHeaders: ['Content-Type', 'Authorization', 'X-Requested-With'],
+}));
+
+app.use(morgan(config.isDevelopment ? 'dev' : 'combined'));
+app.use(compression());
+app.use(express.json({ limit: '10mb' }));
+app.use(express.urlencoded({ extended: true, limit: '10mb' }));
+
+if (config.isProduction) {
+  app.use(limiter);
+}
+
+app.get('/health', (req, res) => {
+  res.json({ 
+    status: 'ok', 
+    timestamp: new Date().toISOString(),
+    environment: config.nodeEnv,
+  });
+});
+
+app.use(errorHandler);
+
+app.listen(config.port, () => {
+  console.log(`🚀 LFG9 Forums server running on port ${config.port}`);
+  console.log(`📝 Environment: ${config.nodeEnv}`);
+  console.log(`🔗 CORS Origin: ${config.corsOrigin}`);
+});

backend/src/middleware/auth.ts

@@ -0,0 +1,159 @@
+import { Request, Response, NextFunction } from 'express';
+import { AuthService } from '../services/authService';
+import { UserModel } from '../models/User';
+import { AuthRequest } from '../types';
+import { AppError } from './errorHandler';
+
+export const authenticateToken = async (
+  req: AuthRequest,
+  res: Response,
+  next: NextFunction
+): Promise<void> => {
+  try {
+    const token = AuthService.extractTokenFromHeader(req.headers.authorization);
+
+    if (!token) {
+      throw new AppError('Access token is missing', 401);
+    }
+
+    const payload = AuthService.verifyToken(token);
+    
+    const user = await UserModel.getUserById(payload.userId);
+    if (!user) {
+      throw new AppError('User not found', 401);
+    }
+
+    req.user = {
+      userId: user.userId,
+      username: user.username,
+      isAdmin: user.isAdmin || false,
+    };
+
+    next();
+  } catch (error: any) {
+    if (error.message === 'Token has expired') {
+      res.status(401).json({
+        success: false,
+        error: 'Token has expired',
+        code: 'TOKEN_EXPIRED',
+      });
+    } else if (error.message === 'Invalid token') {
+      res.status(401).json({
+        success: false,
+        error: 'Invalid token',
+        code: 'INVALID_TOKEN',
+      });
+    } else {
+      next(error);
+    }
+  }
+};
+
+export const optionalAuth = async (
+  req: AuthRequest,
+  res: Response,
+  next: NextFunction
+): Promise<void> => {
+  try {
+    const token = AuthService.extractTokenFromHeader(req.headers.authorization);
+
+    if (token) {
+      const payload = AuthService.verifyToken(token);
+      
+      const user = await UserModel.getUserById(payload.userId);
+      if (user) {
+        req.user = {
+          userId: user.userId,
+          username: user.username,
+          isAdmin: user.isAdmin || false,
+        };
+      }
+    }
+
+    next();
+  } catch (error) {
+    next();
+  }
+};
+
+export const requireAdmin = (
+  req: AuthRequest,
+  res: Response,
+  next: NextFunction
+): void => {
+  if (!req.user) {
+    res.status(401).json({
+      success: false,
+      error: 'Authentication required',
+    });
+    return;
+  }
+
+  if (!req.user.isAdmin) {
+    res.status(403).json({
+      success: false,
+      error: 'Admin privileges required',
+    });
+    return;
+  }
+
+  next();
+};
+
+export const requireOwnership = (resourceUserIdField = 'authorId') => {
+  return (req: AuthRequest, res: Response, next: NextFunction): void => {
+    if (!req.user) {
+      res.status(401).json({
+        success: false,
+        error: 'Authentication required',
+      });
+      return;
+    }
+
+    const resourceUserId = (req as any)[resourceUserIdField] || req.body[resourceUserIdField] || req.params[resourceUserIdField];
+
+    if (req.user.isAdmin || req.user.userId === resourceUserId) {
+      next();
+    } else {
+      res.status(403).json({
+        success: false,
+        error: 'You can only modify your own resources',
+      });
+    }
+  };
+};
+
+export const rateLimitByUser = (windowMs: number, maxRequests: number) => {
+  const userRequestCounts = new Map<string, { count: number; resetTime: number }>();
+
+  return (req: AuthRequest, res: Response, next: NextFunction): void => {
+    if (!req.user) {
+      next();
+      return;
+    }
+
+    const userId = req.user.userId;
+    const now = Date.now();
+    const resetTime = now + windowMs;
+
+    const userInfo = userRequestCounts.get(userId);
+
+    if (!userInfo || now > userInfo.resetTime) {
+      userRequestCounts.set(userId, { count: 1, resetTime });
+      next();
+      return;
+    }
+
+    if (userInfo.count >= maxRequests) {
+      res.status(429).json({
+        success: false,
+        error: 'Too many requests',
+        retryAfter: Math.ceil((userInfo.resetTime - now) / 1000),
+      });
+      return;
+    }
+
+    userInfo.count++;
+    next();
+  };
+};

backend/src/middleware/errorHandler.ts

@@ -0,0 +1,58 @@
+import { Request, Response, NextFunction } from 'express';
+import { config } from '../config';
+
+export class AppError extends Error {
+  statusCode: number;
+  isOperational: boolean;
+
+  constructor(message: string, statusCode: number) {
+    super(message);
+    this.statusCode = statusCode;
+    this.isOperational = true;
+
+    Error.captureStackTrace(this, this.constructor);
+  }
+}
+
+export const errorHandler = (
+  err: Error,
+  req: Request,
+  res: Response,
+  next: NextFunction
+): void => {
+  let error = { ...err } as any;
+  error.message = err.message;
+
+  if (config.isDevelopment) {
+    console.error('Error:', err);
+  }
+
+  if (error.name === 'ValidationError') {
+    const message = Object.values(error.errors).map((val: any) => val.message).join(', ');
+    error = new AppError(message, 400);
+  }
+
+  if (error.code === 11000) {
+    const message = 'Duplicate field value entered';
+    error = new AppError(message, 400);
+  }
+
+  if (error.name === 'JsonWebTokenError') {
+    const message = 'Invalid token. Please log in again!';
+    error = new AppError(message, 401);
+  }
+
+  if (error.name === 'TokenExpiredError') {
+    const message = 'Your token has expired! Please log in again.';
+    error = new AppError(message, 401);
+  }
+
+  res.status(error.statusCode || 500).json({
+    success: false,
+    error: error.message || 'Server Error',
+    ...(config.isDevelopment && { stack: err.stack }),
+  });
+};
+
+export const asyncHandler = (fn: Function) => (req: Request, res: Response, next: NextFunction) =>
+  Promise.resolve(fn(req, res, next)).catch(next);

backend/src/models/Category.ts

@@ -0,0 +1,137 @@
+import { GetCommand, PutCommand, UpdateCommand, DeleteCommand, ScanCommand } from '@aws-sdk/lib-dynamodb';
+import { dynamoDbClient, TableNames } from '../config/database';
+import { Category, CreateCategoryRequest, UpdateCategoryRequest, PaginationParams } from '../types';
+import { v4 as uuidv4 } from 'uuid';
+
+export class CategoryModel {
+  static async createCategory(categoryData: CreateCategoryRequest): Promise<Category> {
+    const categoryId = uuidv4();
+    const now = new Date().toISOString();
+
+    const category: Category = {
+      categoryId,
+      name: categoryData.name,
+      description: categoryData.description,
+      createdAt: now,
+      updatedAt: now,
+      threadCount: 0,
+    };
+
+    const command = new PutCommand({
+      TableName: TableNames.Categories,
+      Item: category,
+    });
+
+    await dynamoDbClient.send(command);
+    return category;
+  }
+
+  static async getCategoryById(categoryId: string): Promise<Category | null> {
+    const command = new GetCommand({
+      TableName: TableNames.Categories,
+      Key: { categoryId },
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Item as Category || null;
+  }
+
+  static async listCategories(pagination?: PaginationParams): Promise<{ categories: Category[]; total: number }> {
+    const command = new ScanCommand({
+      TableName: TableNames.Categories,
+      ...(pagination && {
+        Limit: pagination.limit,
+        ...(pagination.page > 1 && {
+          ExclusiveStartKey: {
+            categoryId: `page_${pagination.page - 1}`,
+          },
+        }),
+      }),
+    });
+
+    const result = await dynamoDbClient.send(command);
+    const categories = (result.Items as Category[]) || [];
+    
+    const countCommand = new ScanCommand({
+      TableName: TableNames.Categories,
+      Select: 'COUNT',
+    });
+    
+    const countResult = await dynamoDbClient.send(countCommand);
+    const total = countResult.Count || 0;
+
+    categories.sort((a, b) => new Date(b.updatedAt).getTime() - new Date(a.updatedAt).getTime());
+
+    return { categories, total };
+  }
+
+  static async updateCategory(categoryId: string, updates: UpdateCategoryRequest): Promise<Category | null> {
+    const updateExpressions: string[] = [];
+    const expressionAttributeNames: Record<string, string> = {};
+    const expressionAttributeValues: Record<string, any> = {};
+
+    Object.keys(updates).forEach((key, index) => {
+      if (key !== 'categoryId' && key !== 'createdAt') {
+        const attributeName = `#attr${index}`;
+        const attributeValue = `:val${index}`;
+        
+        updateExpressions.push(`${attributeName} = ${attributeValue}`);
+        expressionAttributeNames[attributeName] = key;
+        expressionAttributeValues[attributeValue] = (updates as any)[key];
+      }
+    });
+
+    updateExpressions.push('#updatedAt = :updatedAt');
+    expressionAttributeNames['#updatedAt'] = 'updatedAt';
+    expressionAttributeValues[':updatedAt'] = new Date().toISOString();
+
+    const command = new UpdateCommand({
+      TableName: TableNames.Categories,
+      Key: { categoryId },
+      UpdateExpression: `SET ${updateExpressions.join(', ')}`,
+      ExpressionAttributeNames: expressionAttributeNames,
+      ExpressionAttributeValues: expressionAttributeValues,
+      ReturnValues: 'ALL_NEW',
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Attributes as Category || null;
+  }
+
+  static async deleteCategory(categoryId: string): Promise<boolean> {
+    const command = new DeleteCommand({
+      TableName: TableNames.Categories,
+      Key: { categoryId },
+    });
+
+    await dynamoDbClient.send(command);
+    return true;
+  }
+
+  static async incrementThreadCount(categoryId: string): Promise<void> {
+    const command = new UpdateCommand({
+      TableName: TableNames.Categories,
+      Key: { categoryId },
+      UpdateExpression: 'ADD threadCount :inc SET lastActivity = :now',
+      ExpressionAttributeValues: {
+        ':inc': 1,
+        ':now': new Date().toISOString(),
+      },
+    });
+
+    await dynamoDbClient.send(command);
+  }
+
+  static async decrementThreadCount(categoryId: string): Promise<void> {
+    const command = new UpdateCommand({
+      TableName: TableNames.Categories,
+      Key: { categoryId },
+      UpdateExpression: 'ADD threadCount :dec',
+      ExpressionAttributeValues: {
+        ':dec': -1,
+      },
+    });
+
+    await dynamoDbClient.send(command);
+  }
+}

backend/src/models/File.ts

@@ -0,0 +1,185 @@
+import { GetCommand, PutCommand, UpdateCommand, DeleteCommand, ScanCommand, QueryCommand } from '@aws-sdk/lib-dynamodb';
+import { dynamoDbClient, TableNames, GSINames } from '../config/database';
+import { FileMetadata, PaginationParams } from '../types';
+import { v4 as uuidv4 } from 'uuid';
+
+export class FileModel {
+  static async createFile(fileData: Omit<FileMetadata, 'fileId' | 'uploadDate'>): Promise<FileMetadata> {
+    const fileId = uuidv4();
+    const uploadDate = new Date().toISOString();
+
+    const file: FileMetadata = {
+      ...fileData,
+      fileId,
+      uploadDate,
+    };
+
+    const command = new PutCommand({
+      TableName: TableNames.Files,
+      Item: file,
+    });
+
+    await dynamoDbClient.send(command);
+    return file;
+  }
+
+  static async getFileById(fileId: string): Promise<FileMetadata | null> {
+    const command = new GetCommand({
+      TableName: TableNames.Files,
+      Key: { fileId },
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Item as FileMetadata || null;
+  }
+
+  static async getFilesByUser(
+    userId: string, 
+    pagination: PaginationParams
+  ): Promise<{ files: FileMetadata[]; total: number }> {
+    const command = new QueryCommand({
+      TableName: TableNames.Files,
+      IndexName: GSINames.UserFiles,
+      KeyConditionExpression: 'userId = :userId',
+      ExpressionAttributeValues: {
+        ':userId': userId,
+      },
+      ScanIndexForward: pagination.sortOrder === 'asc',
+      Limit: pagination.limit,
+    });
+
+    const result = await dynamoDbClient.send(command);
+    const files = (result.Items as FileMetadata[]) || [];
+
+    const countCommand = new QueryCommand({
+      TableName: TableNames.Files,
+      IndexName: GSINames.UserFiles,
+      KeyConditionExpression: 'userId = :userId',
+      ExpressionAttributeValues: {
+        ':userId': userId,
+      },
+      Select: 'COUNT',
+    });
+
+    const countResult = await dynamoDbClient.send(countCommand);
+    const total = countResult.Count || 0;
+
+    return { files, total };
+  }
+
+  static async getFilesByThread(threadId: string): Promise<FileMetadata[]> {
+    const command = new ScanCommand({
+      TableName: TableNames.Files,
+      FilterExpression: 'threadId = :threadId',
+      ExpressionAttributeValues: {
+        ':threadId': threadId,
+      },
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return (result.Items as FileMetadata[]) || [];
+  }
+
+  static async getFilesByPost(postId: string): Promise<FileMetadata[]> {
+    const command = new ScanCommand({
+      TableName: TableNames.Files,
+      FilterExpression: 'postId = :postId',
+      ExpressionAttributeValues: {
+        ':postId': postId,
+      },
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return (result.Items as FileMetadata[]) || [];
+  }
+
+  static async updateFile(fileId: string, updates: Partial<FileMetadata>): Promise<FileMetadata | null> {
+    const updateExpressions: string[] = [];
+    const expressionAttributeNames: Record<string, string> = {};
+    const expressionAttributeValues: Record<string, any> = {};
+
+    Object.keys(updates).forEach((key, index) => {
+      if (key !== 'fileId' && key !== 'uploadDate') {
+        const attributeName = `#attr${index}`;
+        const attributeValue = `:val${index}`;
+        
+        updateExpressions.push(`${attributeName} = ${attributeValue}`);
+        expressionAttributeNames[attributeName] = key;
+        expressionAttributeValues[attributeValue] = (updates as any)[key];
+      }
+    });
+
+    if (updateExpressions.length === 0) {
+      return null;
+    }
+
+    const command = new UpdateCommand({
+      TableName: TableNames.Files,
+      Key: { fileId },
+      UpdateExpression: `SET ${updateExpressions.join(', ')}`,
+      ExpressionAttributeNames: expressionAttributeNames,
+      ExpressionAttributeValues: expressionAttributeValues,
+      ReturnValues: 'ALL_NEW',
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Attributes as FileMetadata || null;
+  }
+
+  static async deleteFile(fileId: string): Promise<boolean> {
+    const command = new DeleteCommand({
+      TableName: TableNames.Files,
+      Key: { fileId },
+    });
+
+    await dynamoDbClient.send(command);
+    return true;
+  }
+
+  static async getUserStorageUsage(userId: string): Promise<number> {
+    const command = new QueryCommand({
+      TableName: TableNames.Files,
+      IndexName: GSINames.UserFiles,
+      KeyConditionExpression: 'userId = :userId',
+      ExpressionAttributeValues: {
+        ':userId': userId,
+      },
+      ProjectionExpression: 'fileSize',
+    });
+
+    const result = await dynamoDbClient.send(command);
+    const files = (result.Items as Pick<FileMetadata, 'fileSize'>[]) || [];
+    
+    return files.reduce((total, file) => total + file.fileSize, 0);
+  }
+
+  static async deleteFilesByUser(userId: string): Promise<boolean> {
+    const files = await this.getFilesByUser(userId, { page: 1, limit: 1000 });
+    
+    for (const file of files.files) {
+      await this.deleteFile(file.fileId);
+    }
+    
+    return true;
+  }
+
+  static async deleteFilesByThread(threadId: string): Promise<boolean> {
+    const files = await this.getFilesByThread(threadId);
+    
+    for (const file of files) {
+      await this.deleteFile(file.fileId);
+    }
+    
+    return true;
+  }
+
+  static async deleteFilesByPost(postId: string): Promise<boolean> {
+    const files = await this.getFilesByPost(postId);
+    
+    for (const file of files) {
+      await this.deleteFile(file.fileId);
+    }
+    
+    return true;
+  }
+}

backend/src/models/Post.ts

@@ -0,0 +1,208 @@
+import { GetCommand, PutCommand, UpdateCommand, DeleteCommand, ScanCommand, QueryCommand } from '@aws-sdk/lib-dynamodb';
+import { dynamoDbClient, TableNames, GSINames } from '../config/database';
+import { Post, CreatePostRequest, UpdatePostRequest, PaginationParams } from '../types';
+import { v4 as uuidv4 } from 'uuid';
+
+export class PostModel {
+  static async createPost(postData: CreatePostRequest, authorId: string, authorUsername: string): Promise<Post> {
+    const postId = uuidv4();
+    const now = new Date().toISOString();
+
+    const post: Post = {
+      postId,
+      threadId: postData.threadId,
+      richContent: postData.richContent,
+      authorId,
+      authorUsername,
+      createdAt: now,
+      updatedAt: now,
+      parentPostId: postData.parentPostId,
+      attachedFiles: postData.attachedFiles ? [] : undefined,
+      isEdited: false,
+    };
+
+    const command = new PutCommand({
+      TableName: TableNames.Posts,
+      Item: post,
+    });
+
+    await dynamoDbClient.send(command);
+    return post;
+  }
+
+  static async getPostById(postId: string): Promise<Post | null> {
+    const command = new GetCommand({
+      TableName: TableNames.Posts,
+      Key: { postId },
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Item as Post || null;
+  }
+
+  static async getPostsByThread(
+    threadId: string, 
+    pagination: PaginationParams
+  ): Promise<{ posts: Post[]; total: number }> {
+    const command = new QueryCommand({
+      TableName: TableNames.Posts,
+      IndexName: GSINames.ThreadPosts,
+      KeyConditionExpression: 'threadId = :threadId',
+      ExpressionAttributeValues: {
+        ':threadId': threadId,
+      },
+      ScanIndexForward: pagination.sortOrder === 'asc',
+      Limit: pagination.limit,
+    });
+
+    const result = await dynamoDbClient.send(command);
+    const posts = (result.Items as Post[]) || [];
+
+    const countCommand = new QueryCommand({
+      TableName: TableNames.Posts,
+      IndexName: GSINames.ThreadPosts,
+      KeyConditionExpression: 'threadId = :threadId',
+      ExpressionAttributeValues: {
+        ':threadId': threadId,
+      },
+      Select: 'COUNT',
+    });
+
+    const countResult = await dynamoDbClient.send(countCommand);
+    const total = countResult.Count || 0;
+
+    return { posts, total };
+  }
+
+  static async getPostsByUser(
+    authorId: string, 
+    pagination: PaginationParams
+  ): Promise<{ posts: Post[]; total: number }> {
+    const command = new QueryCommand({
+      TableName: TableNames.Posts,
+      IndexName: GSINames.UserPosts,
+      KeyConditionExpression: 'authorId = :authorId',
+      ExpressionAttributeValues: {
+        ':authorId': authorId,
+      },
+      ScanIndexForward: pagination.sortOrder === 'asc',
+      Limit: pagination.limit,
+    });
+
+    const result = await dynamoDbClient.send(command);
+    const posts = (result.Items as Post[]) || [];
+
+    const countCommand = new QueryCommand({
+      TableName: TableNames.Posts,
+      IndexName: GSINames.UserPosts,
+      KeyConditionExpression: 'authorId = :authorId',
+      ExpressionAttributeValues: {
+        ':authorId': authorId,
+      },
+      Select: 'COUNT',
+    });
+
+    const countResult = await dynamoDbClient.send(countResult);
+    const total = countResult.Count || 0;
+
+    return { posts, total };
+  }
+
+  static async getReplies(parentPostId: string): Promise<Post[]> {
+    const command = new ScanCommand({
+      TableName: TableNames.Posts,
+      FilterExpression: 'parentPostId = :parentPostId',
+      ExpressionAttributeValues: {
+        ':parentPostId': parentPostId,
+      },
+    });
+
+    const result = await dynamoDbClient.send(command);
+    const posts = (result.Items as Post[]) || [];
+    
+    posts.sort((a, b) => new Date(a.createdAt).getTime() - new Date(b.createdAt).getTime());
+    
+    return posts;
+  }
+
+  static async updatePost(postId: string, updates: UpdatePostRequest): Promise<Post | null> {
+    const updateExpressions: string[] = [];
+    const expressionAttributeNames: Record<string, string> = {};
+    const expressionAttributeValues: Record<string, any> = {};
+
+    Object.keys(updates).forEach((key, index) => {
+      if (key !== 'postId' && key !== 'createdAt') {
+        const attributeName = `#attr${index}`;
+        const attributeValue = `:val${index}`;
+        
+        updateExpressions.push(`${attributeName} = ${attributeValue}`);
+        expressionAttributeNames[attributeName] = key;
+        expressionAttributeValues[attributeValue] = (updates as any)[key];
+      }
+    });
+
+    updateExpressions.push('#updatedAt = :updatedAt', '#isEdited = :isEdited', '#editedAt = :editedAt');
+    expressionAttributeNames['#updatedAt'] = 'updatedAt';
+    expressionAttributeNames['#isEdited'] = 'isEdited';
+    expressionAttributeNames['#editedAt'] = 'editedAt';
+    expressionAttributeValues[':updatedAt'] = new Date().toISOString();
+    expressionAttributeValues[':isEdited'] = true;
+    expressionAttributeValues[':editedAt'] = new Date().toISOString();
+
+    const command = new UpdateCommand({
+      TableName: TableNames.Posts,
+      Key: { postId },
+      UpdateExpression: `SET ${updateExpressions.join(', ')}`,
+      ExpressionAttributeNames: expressionAttributeNames,
+      ExpressionAttributeValues: expressionAttributeValues,
+      ReturnValues: 'ALL_NEW',
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Attributes as Post || null;
+  }
+
+  static async deletePost(postId: string): Promise<boolean> {
+    const command = new DeleteCommand({
+      TableName: TableNames.Posts,
+      Key: { postId },
+    });
+
+    await dynamoDbClient.send(command);
+    return true;
+  }
+
+  static async searchPosts(
+    query: string, 
+    threadId?: string, 
+    pagination?: PaginationParams
+  ): Promise<{ posts: Post[]; total: number }> {
+    const filterExpressions: string[] = [];
+    const expressionAttributeValues: Record<string, any> = {};
+    const expressionAttributeNames: Record<string, string> = {};
+
+    filterExpressions.push('contains(#content, :query)');
+    expressionAttributeNames['#content'] = 'richContent';
+    expressionAttributeValues[':query'] = query;
+
+    if (threadId) {
+      filterExpressions.push('threadId = :threadId');
+      expressionAttributeValues[':threadId'] = threadId;
+    }
+
+    const command = new ScanCommand({
+      TableName: TableNames.Posts,
+      FilterExpression: filterExpressions.join(' AND '),
+      ExpressionAttributeNames: expressionAttributeNames,
+      ExpressionAttributeValues: expressionAttributeValues,
+      ...(pagination && { Limit: pagination.limit }),
+    });
+
+    const result = await dynamoDbClient.send(command);
+    const posts = (result.Items as Post[]) || [];
+    
+    posts.sort((a, b) => new Date(b.updatedAt).getTime() - new Date(a.updatedAt).getTime());
+
+    return { posts, total: posts.length };
+  }
+}

backend/src/models/Thread.ts

@@ -0,0 +1,224 @@
+import { GetCommand, PutCommand, UpdateCommand, DeleteCommand, ScanCommand, QueryCommand } from '@aws-sdk/lib-dynamodb';
+import { dynamoDbClient, TableNames, GSINames } from '../config/database';
+import { Thread, CreateThreadRequest, UpdateThreadRequest, PaginationParams } from '../types';
+import { v4 as uuidv4 } from 'uuid';
+
+export class ThreadModel {
+  static async createThread(threadData: CreateThreadRequest, authorId: string, authorUsername: string): Promise<Thread> {
+    const threadId = uuidv4();
+    const now = new Date().toISOString();
+
+    const thread: Thread = {
+      threadId,
+      categoryId: threadData.categoryId,
+      title: threadData.title,
+      richContent: threadData.richContent,
+      authorId,
+      authorUsername,
+      createdAt: now,
+      updatedAt: now,
+      attachedFiles: threadData.attachedFiles ? [] : undefined,
+      postCount: 0,
+      lastPostAt: now,
+      isLocked: false,
+      isPinned: false,
+    };
+
+    const command = new PutCommand({
+      TableName: TableNames.Threads,
+      Item: thread,
+    });
+
+    await dynamoDbClient.send(command);
+    return thread;
+  }
+
+  static async getThreadById(threadId: string): Promise<Thread | null> {
+    const command = new GetCommand({
+      TableName: TableNames.Threads,
+      Key: { threadId },
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Item as Thread || null;
+  }
+
+  static async getThreadsByCategory(
+    categoryId: string, 
+    pagination: PaginationParams
+  ): Promise<{ threads: Thread[]; total: number }> {
+    const command = new QueryCommand({
+      TableName: TableNames.Threads,
+      IndexName: GSINames.CategoryThreads,
+      KeyConditionExpression: 'categoryId = :categoryId',
+      ExpressionAttributeValues: {
+        ':categoryId': categoryId,
+      },
+      ScanIndexForward: pagination.sortOrder === 'asc',
+      Limit: pagination.limit,
+    });
+
+    const result = await dynamoDbClient.send(command);
+    let threads = (result.Items as Thread[]) || [];
+
+    threads.sort((a, b) => {
+      if (a.isPinned && !b.isPinned) return -1;
+      if (!a.isPinned && b.isPinned) return 1;
+      return new Date(b.lastPostAt || b.updatedAt).getTime() - new Date(a.lastPostAt || a.updatedAt).getTime();
+    });
+
+    const countCommand = new QueryCommand({
+      TableName: TableNames.Threads,
+      IndexName: GSINames.CategoryThreads,
+      KeyConditionExpression: 'categoryId = :categoryId',
+      ExpressionAttributeValues: {
+        ':categoryId': categoryId,
+      },
+      Select: 'COUNT',
+    });
+
+    const countResult = await dynamoDbClient.send(countCommand);
+    const total = countResult.Count || 0;
+
+    return { threads, total };
+  }
+
+  static async getThreadsByUser(
+    authorId: string, 
+    pagination: PaginationParams
+  ): Promise<{ threads: Thread[]; total: number }> {
+    const command = new QueryCommand({
+      TableName: TableNames.Threads,
+      IndexName: GSINames.UserThreads,
+      KeyConditionExpression: 'authorId = :authorId',
+      ExpressionAttributeValues: {
+        ':authorId': authorId,
+      },
+      ScanIndexForward: pagination.sortOrder === 'asc',
+      Limit: pagination.limit,
+    });
+
+    const result = await dynamoDbClient.send(command);
+    const threads = (result.Items as Thread[]) || [];
+
+    const countCommand = new QueryCommand({
+      TableName: TableNames.Threads,
+      IndexName: GSINames.UserThreads,
+      KeyConditionExpression: 'authorId = :authorId',
+      ExpressionAttributeValues: {
+        ':authorId': authorId,
+      },
+      Select: 'COUNT',
+    });
+
+    const countResult = await dynamoDbClient.send(countCommand);
+    const total = countResult.Count || 0;
+
+    return { threads, total };
+  }
+
+  static async updateThread(threadId: string, updates: UpdateThreadRequest): Promise<Thread | null> {
+    const updateExpressions: string[] = [];
+    const expressionAttributeNames: Record<string, string> = {};
+    const expressionAttributeValues: Record<string, any> = {};
+
+    Object.keys(updates).forEach((key, index) => {
+      if (key !== 'threadId' && key !== 'createdAt') {
+        const attributeName = `#attr${index}`;
+        const attributeValue = `:val${index}`;
+        
+        updateExpressions.push(`${attributeName} = ${attributeValue}`);
+        expressionAttributeNames[attributeName] = key;
+        expressionAttributeValues[attributeValue] = (updates as any)[key];
+      }
+    });
+
+    updateExpressions.push('#updatedAt = :updatedAt');
+    expressionAttributeNames['#updatedAt'] = 'updatedAt';
+    expressionAttributeValues[':updatedAt'] = new Date().toISOString();
+
+    const command = new UpdateCommand({
+      TableName: TableNames.Threads,
+      Key: { threadId },
+      UpdateExpression: `SET ${updateExpressions.join(', ')}`,
+      ExpressionAttributeNames: expressionAttributeNames,
+      ExpressionAttributeValues: expressionAttributeValues,
+      ReturnValues: 'ALL_NEW',
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Attributes as Thread || null;
+  }
+
+  static async deleteThread(threadId: string): Promise<boolean> {
+    const command = new DeleteCommand({
+      TableName: TableNames.Threads,
+      Key: { threadId },
+    });
+
+    await dynamoDbClient.send(command);
+    return true;
+  }
+
+  static async incrementPostCount(threadId: string): Promise<void> {
+    const command = new UpdateCommand({
+      TableName: TableNames.Threads,
+      Key: { threadId },
+      UpdateExpression: 'ADD postCount :inc SET lastPostAt = :now',
+      ExpressionAttributeValues: {
+        ':inc': 1,
+        ':now': new Date().toISOString(),
+      },
+    });
+
+    await dynamoDbClient.send(command);
+  }
+
+  static async decrementPostCount(threadId: string): Promise<void> {
+    const command = new UpdateCommand({
+      TableName: TableNames.Threads,
+      Key: { threadId },
+      UpdateExpression: 'ADD postCount :dec',
+      ExpressionAttributeValues: {
+        ':dec': -1,
+      },
+    });
+
+    await dynamoDbClient.send(command);
+  }
+
+  static async searchThreads(
+    query: string, 
+    categoryId?: string, 
+    pagination?: PaginationParams
+  ): Promise<{ threads: Thread[]; total: number }> {
+    const filterExpressions: string[] = [];
+    const expressionAttributeValues: Record<string, any> = {};
+    const expressionAttributeNames: Record<string, string> = {};
+
+    filterExpressions.push('contains(#title, :query) OR contains(#content, :query)');
+    expressionAttributeNames['#title'] = 'title';
+    expressionAttributeNames['#content'] = 'richContent';
+    expressionAttributeValues[':query'] = query;
+
+    if (categoryId) {
+      filterExpressions.push('categoryId = :categoryId');
+      expressionAttributeValues[':categoryId'] = categoryId;
+    }
+
+    const command = new ScanCommand({
+      TableName: TableNames.Threads,
+      FilterExpression: filterExpressions.join(' AND '),
+      ExpressionAttributeNames: expressionAttributeNames,
+      ExpressionAttributeValues: expressionAttributeValues,
+      ...(pagination && { Limit: pagination.limit }),
+    });
+
+    const result = await dynamoDbClient.send(command);
+    const threads = (result.Items as Thread[]) || [];
+    
+    threads.sort((a, b) => new Date(b.lastPostAt || b.updatedAt).getTime() - new Date(a.lastPostAt || a.updatedAt).getTime());
+
+    return { threads, total: threads.length };
+  }
+}

backend/src/models/User.ts

@@ -0,0 +1,163 @@
+import { GetCommand, PutCommand, UpdateCommand, DeleteCommand, ScanCommand, QueryCommand } from '@aws-sdk/lib-dynamodb';
+import { dynamoDbClient, TableNames, GSINames } from '../config/database';
+import { User, CreateUserRequest, PaginationParams } from '../types';
+import { v4 as uuidv4 } from 'uuid';
+import bcrypt from 'bcrypt';
+
+export class UserModel {
+  static async createUser(userData: CreateUserRequest): Promise<User> {
+    const userId = uuidv4();
+    const hashedPassword = await bcrypt.hash(userData.password, 12);
+    const now = new Date().toISOString();
+
+    const user: User = {
+      userId,
+      username: userData.username,
+      email: userData.email,
+      passwordHash: hashedPassword,
+      createdAt: now,
+      updatedAt: now,
+      storageQuotaUsed: 0,
+    };
+
+    const command = new PutCommand({
+      TableName: TableNames.Users,
+      Item: user,
+      ConditionExpression: 'attribute_not_exists(userId) AND attribute_not_exists(email) AND attribute_not_exists(username)',
+    });
+
+    try {
+      await dynamoDbClient.send(command);
+      const { passwordHash, ...userWithoutPassword } = user;
+      return userWithoutPassword as User;
+    } catch (error: any) {
+      if (error.name === 'ConditionalCheckFailedException') {
+        throw new Error('User with this email or username already exists');
+      }
+      throw error;
+    }
+  }
+
+  static async getUserById(userId: string): Promise<User | null> {
+    const command = new GetCommand({
+      TableName: TableNames.Users,
+      Key: { userId },
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Item as User || null;
+  }
+
+  static async getUserByEmail(email: string): Promise<User | null> {
+    const command = new ScanCommand({
+      TableName: TableNames.Users,
+      FilterExpression: 'email = :email',
+      ExpressionAttributeValues: {
+        ':email': email,
+      },
+      Limit: 1,
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Items?.[0] as User || null;
+  }
+
+  static async getUserByUsername(username: string): Promise<User | null> {
+    const command = new ScanCommand({
+      TableName: TableNames.Users,
+      FilterExpression: 'username = :username',
+      ExpressionAttributeValues: {
+        ':username': username,
+      },
+      Limit: 1,
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Items?.[0] as User || null;
+  }
+
+  static async updateUser(userId: string, updates: Partial<User>): Promise<User | null> {
+    const updateExpressions: string[] = [];
+    const expressionAttributeNames: Record<string, string> = {};
+    const expressionAttributeValues: Record<string, any> = {};
+
+    Object.keys(updates).forEach((key, index) => {
+      if (key !== 'userId' && key !== 'createdAt') {
+        const attributeName = `#attr${index}`;
+        const attributeValue = `:val${index}`;
+        
+        updateExpressions.push(`${attributeName} = ${attributeValue}`);
+        expressionAttributeNames[attributeName] = key;
+        expressionAttributeValues[attributeValue] = (updates as any)[key];
+      }
+    });
+
+    updateExpressions.push('#updatedAt = :updatedAt');
+    expressionAttributeNames['#updatedAt'] = 'updatedAt';
+    expressionAttributeValues[':updatedAt'] = new Date().toISOString();
+
+    const command = new UpdateCommand({
+      TableName: TableNames.Users,
+      Key: { userId },
+      UpdateExpression: `SET ${updateExpressions.join(', ')}`,
+      ExpressionAttributeNames: expressionAttributeNames,
+      ExpressionAttributeValues: expressionAttributeValues,
+      ReturnValues: 'ALL_NEW',
+    });
+
+    const result = await dynamoDbClient.send(command);
+    return result.Attributes as User || null;
+  }
+
+  static async deleteUser(userId: string): Promise<boolean> {
+    const command = new DeleteCommand({
+      TableName: TableNames.Users,
+      Key: { userId },
+    });
+
+    await dynamoDbClient.send(command);
+    return true;
+  }
+
+  static async listUsers(pagination: PaginationParams): Promise<{ users: User[]; total: number }> {
+    const command = new ScanCommand({
+      TableName: TableNames.Users,
+      Limit: pagination.limit,
+      ...(pagination.page > 1 && {
+        ExclusiveStartKey: {
+          userId: `page_${pagination.page - 1}`,
+        },
+      }),
+    });
+
+    const result = await dynamoDbClient.send(command);
+    const users = (result.Items as User[]) || [];
+    
+    const countCommand = new ScanCommand({
+      TableName: TableNames.Users,
+      Select: 'COUNT',
+    });
+    
+    const countResult = await dynamoDbClient.send(countCommand);
+    const total = countResult.Count || 0;
+
+    return { users, total };
+  }
+
+  static async updateStorageQuota(userId: string, bytesUsed: number): Promise<void> {
+    const command = new UpdateCommand({
+      TableName: TableNames.Users,
+      Key: { userId },
+      UpdateExpression: 'ADD storageQuotaUsed :bytes',
+      ExpressionAttributeValues: {
+        ':bytes': bytesUsed,
+      },
+    });
+
+    await dynamoDbClient.send(command);
+  }
+
+  static async validatePassword(user: User, password: string): Promise<boolean> {
+    return bcrypt.compare(password, user.passwordHash);
+  }
+}

backend/src/services/authService.ts

@@ -0,0 +1,101 @@
+import jwt from 'jsonwebtoken';
+import { User } from '../types';
+import { config } from '../config';
+
+export interface JWTPayload {
+  userId: string;
+  username: string;
+  email: string;
+  isAdmin?: boolean;
+  iat?: number;
+  exp?: number;
+}
+
+export class AuthService {
+  static generateToken(user: User): string {
+    const payload: JWTPayload = {
+      userId: user.userId,
+      username: user.username,
+      email: user.email,
+      isAdmin: user.isAdmin || false,
+    };
+
+    return jwt.sign(payload, config.jwtSecret, {
+      expiresIn: config.jwtExpiresIn,
+    });
+  }
+
+  static verifyToken(token: string): JWTPayload {
+    try {
+      return jwt.verify(token, config.jwtSecret) as JWTPayload;
+    } catch (error: any) {
+      if (error.name === 'TokenExpiredError') {
+        throw new Error('Token has expired');
+      } else if (error.name === 'JsonWebTokenError') {
+        throw new Error('Invalid token');
+      }
+      throw error;
+    }
+  }
+
+  static extractTokenFromHeader(authHeader: string | undefined): string | null {
+    if (!authHeader) {
+      return null;
+    }
+
+    const parts = authHeader.split(' ');
+    if (parts.length !== 2 || parts[0] !== 'Bearer') {
+      return null;
+    }
+
+    return parts[1];
+  }
+
+  static generateRefreshToken(user: User): string {
+    const payload: JWTPayload = {
+      userId: user.userId,
+      username: user.username,
+      email: user.email,
+      isAdmin: user.isAdmin || false,
+    };
+
+    return jwt.sign(payload, config.jwtSecret, {
+      expiresIn: '30d', // Refresh tokens last 30 days
+    });
+  }
+
+  static decodeTokenWithoutVerification(token: string): JWTPayload | null {
+    try {
+      return jwt.decode(token) as JWTPayload;
+    } catch (error) {
+      return null;
+    }
+  }
+
+  static isTokenExpired(token: string): boolean {
+    try {
+      const decoded = jwt.decode(token) as JWTPayload;
+      if (!decoded || !decoded.exp) {
+        return true;
+      }
+
+      const currentTime = Math.floor(Date.now() / 1000);
+      return decoded.exp < currentTime;
+    } catch (error) {
+      return true;
+    }
+  }
+
+  static getTokenExpirationDate(token: string): Date | null {
+    try {
+      const decoded = jwt.decode(token) as JWTPayload;
+      if (!decoded || !decoded.exp) {
+        return null;
+      }
+
+      return new Date(decoded.exp * 1000);
+    } catch (error) {
+      return null;
+    }
+  }
+}

backend/src/services/s3Service.ts

@@ -0,0 +1,187 @@
+import { PutObjectCommand, DeleteObjectCommand, GetObjectCommand } from '@aws-sdk/client-s3';
+import { getSignedUrl } from '@aws-sdk/s3-request-presigner';
+import { s3Client, S3_BUCKET_NAME, S3_FOLDERS } from '../config/s3';
+import { config } from '../config';
+import sharp from 'sharp';
+import { v4 as uuidv4 } from 'uuid';
+
+export class S3Service {
+  static async uploadFile(
+    file: Buffer,
+    fileName: string,
+    contentType: string,
+    folder: keyof typeof S3_FOLDERS = 'images'
+  ): Promise<{ key: string; url: string }> {
+    const fileExtension = fileName.split('.').pop();
+    const uniqueFileName = `${uuidv4()}.${fileExtension}`;
+    const key = `${S3_FOLDERS[folder]}${uniqueFileName}`;
+
+    const command = new PutObjectCommand({
+      Bucket: S3_BUCKET_NAME,
+      Key: key,
+      Body: file,
+      ContentType: contentType,
+      CacheControl: 'max-age=31536000', // 1 year
+      Metadata: {
+        originalName: fileName,
+        uploadDate: new Date().toISOString(),
+      },
+    });
+
+    await s3Client.send(command);
+
+    const url = `https://${S3_BUCKET_NAME}.s3.amazonaws.com/${key}`;
+    return { key, url };
+  }
+
+  static async uploadImage(
+    file: Buffer,
+    fileName: string,
+    contentType: string
+  ): Promise<{
+    originalKey: string;
+    thumbnailKey: string;
+    mediumKey: string;
+    originalUrl: string;
+    thumbnailUrl: string;
+    mediumUrl: string;
+  }> {
+    const fileExtension = fileName.split('.').pop();
+    const uniqueFileName = `${uuidv4()}.${fileExtension}`;
+
+    const [originalImage, thumbnailImage, mediumImage] = await Promise.all([
+      this.optimizeImage(file, { width: 1920, height: 1080, quality: 85 }),
+      this.optimizeImage(file, { width: 300, height: 200, quality: 80 }),
+      this.optimizeImage(file, { width: 800, height: 600, quality: 85 }),
+    ]);
+
+    const [original, thumbnail, medium] = await Promise.all([
+      this.uploadFile(originalImage, uniqueFileName, contentType, 'images'),
+      this.uploadFile(thumbnailImage, uniqueFileName, contentType, 'thumbnails'),
+      this.uploadFile(mediumImage, uniqueFileName, contentType, 'medium'),
+    ]);
+
+    return {
+      originalKey: original.key,
+      thumbnailKey: thumbnail.key,
+      mediumKey: medium.key,
+      originalUrl: original.url,
+      thumbnailUrl: thumbnail.url,
+      mediumUrl: medium.url,
+    };
+  }
+
+  static async deleteFile(key: string): Promise<void> {
+    const command = new DeleteObjectCommand({
+      Bucket: S3_BUCKET_NAME,
+      Key: key,
+    });
+
+    await s3Client.send(command);
+  }
+
+  static async deleteFiles(keys: string[]): Promise<void> {
+    await Promise.all(keys.map(key => this.deleteFile(key)));
+  }
+
+  static async getPresignedUploadUrl(
+    fileName: string,
+    contentType: string,
+    expiresIn: number = 3600
+  ): Promise<{ uploadUrl: string; key: string }> {
+    const fileExtension = fileName.split('.').pop();
+    const uniqueFileName = `${uuidv4()}.${fileExtension}`;
+    const key = `${S3_FOLDERS.images}${uniqueFileName}`;
+
+    const command = new PutObjectCommand({
+      Bucket: S3_BUCKET_NAME,
+      Key: key,
+      ContentType: contentType,
+      CacheControl: 'max-age=31536000',
+      Metadata: {
+        originalName: fileName,
+        uploadDate: new Date().toISOString(),
+      },
+    });
+
+    const uploadUrl = await getSignedUrl(s3Client, command, { expiresIn });
+
+    return { uploadUrl, key };
+  }
+
+  static async getPresignedDownloadUrl(
+    key: string,
+    expiresIn: number = 3600
+  ): Promise<string> {
+    const command = new GetObjectCommand({
+      Bucket: S3_BUCKET_NAME,
+      Key: key,
+    });
+
+    return await getSignedUrl(s3Client, command, { expiresIn });
+  }
+
+  private static async optimizeImage(
+    imageBuffer: Buffer,
+    options: { width: number; height: number; quality: number }
+  ): Promise<Buffer> {
+    return await sharp(imageBuffer)
+      .resize(options.width, options.height, {
+        fit: 'inside',
+        withoutEnlargement: true,
+      })
+      .jpeg({
+        quality: options.quality,
+        progressive: true,
+      })
+      .toBuffer();
+  }
+
+  static async getFileInfo(key: string): Promise<{
+    exists: boolean;
+    size?: number;
+    lastModified?: Date;
+    contentType?: string;
+  }> {
+    try {
+      const command = new GetObjectCommand({
+        Bucket: S3_BUCKET_NAME,
+        Key: key,
+      });
+
+      const response = await s3Client.send(command);
+
+      return {
+        exists: true,
+        size: response.ContentLength,
+        lastModified: response.LastModified,
+        contentType: response.ContentType,
+      };
+    } catch (error: any) {
+      if (error.name === 'NoSuchKey') {
+        return { exists: false };
+      }
+      throw error;
+    }
+  }
+
+  static validateFileType(contentType: string, allowedTypes: string[]): boolean {
+    return allowedTypes.includes(contentType);
+  }
+
+  static validateFileSize(size: number, maxSize: number): boolean {
+    return size <= maxSize;
+  }
+
+  static isImageType(contentType: string): boolean {
+    return config.fileUpload.allowedImageTypes.includes(contentType);
+  }
+
+  static isDocumentType(contentType: string): boolean {
+    return config.fileUpload.allowedDocumentTypes.includes(contentType);
+  }
+
+  static generatePublicUrl(key: string): string {
+    return `https://${S3_BUCKET_NAME}.s3.amazonaws.com/${key}`;
+  }
+}

backend/src/types/index.ts

@@ -0,0 +1,177 @@
+export interface User {
+  userId: string;
+  username: string;
+  email: string;
+  passwordHash: string;
+  createdAt: string;
+  updatedAt: string;
+  profileInfo?: {
+    bio?: string;
+    avatar?: string;
+    location?: string;
+  };
+  storageQuotaUsed: number;
+  isAdmin?: boolean;
+}
+
+export interface Category {
+  categoryId: string;
+  name: string;
+  description: string;
+  createdAt: string;
+  updatedAt: string;
+  threadCount?: number;
+  lastActivity?: string;
+}
+
+export interface Thread {
+  threadId: string;
+  categoryId: string;
+  title: string;
+  richContent: RichContent;
+  authorId: string;
+  authorUsername?: string;
+  createdAt: string;
+  updatedAt: string;
+  attachedFiles?: FileMetadata[];
+  postCount?: number;
+  lastPostAt?: string;
+  isLocked?: boolean;
+  isPinned?: boolean;
+}
+
+export interface Post {
+  postId: string;
+  threadId: string;
+  richContent: RichContent;
+  authorId: string;
+  authorUsername?: string;
+  createdAt: string;
+  updatedAt: string;
+  parentPostId?: string;
+  attachedFiles?: FileMetadata[];
+  isEdited?: boolean;
+  editedAt?: string;
+}
+
+export interface FileMetadata {
+  fileId: string;
+  userId: string;
+  fileName: string;
+  fileType: string;
+  fileSize: number;
+  s3Key: string;
+  threadId?: string;
+  postId?: string;
+  uploadDate: string;
+  thumbnailKey?: string;
+  mediumKey?: string;
+  altText?: string;
+}
+
+export interface RichContent {
+  type: 'doc';
+  content: RichContentNode[];
+}
+
+export interface RichContentNode {
+  type: string;
+  attrs?: Record<string, any>;
+  content?: RichContentNode[];
+  text?: string;
+  marks?: RichContentMark[];
+}
+
+export interface RichContentMark {
+  type: string;
+  attrs?: Record<string, any>;
+}
+
+export interface AuthRequest extends Request {
+  user?: {
+    userId: string;
+    username: string;
+    isAdmin?: boolean;
+  };
+}
+
+export interface PaginationParams {
+  page: number;
+  limit: number;
+  sortBy?: string;
+  sortOrder?: 'asc' | 'desc';
+}
+
+export interface SearchParams {
+  query: string;
+  categoryId?: string;
+  authorId?: string;
+  dateFrom?: string;
+  dateTo?: string;
+}
+
+export interface ApiResponse<T = any> {
+  success: boolean;
+  data?: T;
+  error?: string;
+  message?: string;
+  pagination?: {
+    page: number;
+    limit: number;
+    total: number;
+    pages: number;
+  };
+}
+
+export interface CreateUserRequest {
+  username: string;
+  email: string;
+  password: string;
+}
+
+export interface LoginRequest {
+  email: string;
+  password: string;
+}
+
+export interface CreateCategoryRequest {
+  name: string;
+  description: string;
+}
+
+export interface UpdateCategoryRequest {
+  name?: string;
+  description?: string;
+}
+
+export interface CreateThreadRequest {
+  title: string;
+  richContent: RichContent;
+  categoryId: string;
+  attachedFiles?: string[];
+}
+
+export interface UpdateThreadRequest {
+  title?: string;
+  richContent?: RichContent;
+  attachedFiles?: string[];
+  isLocked?: boolean;
+  isPinned?: boolean;
+}
+
+export interface CreatePostRequest {
+  richContent: RichContent;
+  threadId: string;
+  parentPostId?: string;
+  attachedFiles?: string[];
+}
+
+export interface UpdatePostRequest {
+  richContent?: RichContent;
+  attachedFiles?: string[];
+}
+
+export interface FileUploadRequest {
+  file: Express.Multer.File;
+  altText?: string;
+}

backend/src/utils/validation.ts

@@ -0,0 +1,261 @@
+import Joi from 'joi';
+import { Request, Response, NextFunction } from 'express';
+import { RichContent } from '../types';
+
+export const userRegistrationSchema = Joi.object({
+  username: Joi.string()
+    .alphanum()
+    .min(3)
+    .max(30)
+    .required()
+    .messages({
+      'string.alphanum': 'Username must contain only alphanumeric characters',
+      'string.min': 'Username must be at least 3 characters long',
+      'string.max': 'Username must be less than 30 characters long',
+      'any.required': 'Username is required',
+    }),
+  email: Joi.string()
+    .email()
+    .required()
+    .messages({
+      'string.email': 'Please enter a valid email address',
+      'any.required': 'Email is required',
+    }),
+  password: Joi.string()
+    .min(8)
+    .pattern(new RegExp('^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)(?=.*[@$!%*?&])[A-Za-z\\d@$!%*?&]'))
+    .required()
+    .messages({
+      'string.min': 'Password must be at least 8 characters long',
+      'string.pattern.base': 'Password must contain at least one uppercase letter, one lowercase letter, one number, and one special character',
+      'any.required': 'Password is required',
+    }),
+});
+
+export const userLoginSchema = Joi.object({
+  email: Joi.string()
+    .email()
+    .required()
+    .messages({
+      'string.email': 'Please enter a valid email address',
+      'any.required': 'Email is required',
+    }),
+  password: Joi.string()
+    .required()
+    .messages({
+      'any.required': 'Password is required',
+    }),
+});
+
+export const categorySchema = Joi.object({
+  name: Joi.string()
+    .min(1)
+    .max(100)
+    .required()
+    .messages({
+      'string.min': 'Category name cannot be empty',
+      'string.max': 'Category name must be less than 100 characters',
+      'any.required': 'Category name is required',
+    }),
+  description: Joi.string()
+    .max(500)
+    .required()
+    .messages({
+      'string.max': 'Category description must be less than 500 characters',
+      'any.required': 'Category description is required',
+    }),
+});
+
+export const updateCategorySchema = Joi.object({
+  name: Joi.string()
+    .min(1)
+    .max(100)
+    .messages({
+      'string.min': 'Category name cannot be empty',
+      'string.max': 'Category name must be less than 100 characters',
+    }),
+  description: Joi.string()
+    .max(500)
+    .messages({
+      'string.max': 'Category description must be less than 500 characters',
+    }),
+}).min(1);
+
+const richContentSchema = Joi.object({
+  type: Joi.string().valid('doc').required(),
+  content: Joi.array().items(Joi.object().unknown(true)).required(),
+});
+
+export const threadSchema = Joi.object({
+  title: Joi.string()
+    .min(1)
+    .max(200)
+    .required()
+    .messages({
+      'string.min': 'Thread title cannot be empty',
+      'string.max': 'Thread title must be less than 200 characters',
+      'any.required': 'Thread title is required',
+    }),
+  richContent: richContentSchema.required(),
+  categoryId: Joi.string()
+    .guid({ version: 'uuidv4' })
+    .required()
+    .messages({
+      'string.guid': 'Invalid category ID format',
+      'any.required': 'Category ID is required',
+    }),
+  attachedFiles: Joi.array().items(Joi.string().guid({ version: 'uuidv4' })).optional(),
+});
+
+export const updateThreadSchema = Joi.object({
+  title: Joi.string()
+    .min(1)
+    .max(200)
+    .messages({
+      'string.min': 'Thread title cannot be empty',
+      'string.max': 'Thread title must be less than 200 characters',
+    }),
+  richContent: richContentSchema.optional(),
+  attachedFiles: Joi.array().items(Joi.string().guid({ version: 'uuidv4' })).optional(),
+  isLocked: Joi.boolean().optional(),
+  isPinned: Joi.boolean().optional(),
+}).min(1);
+
+export const postSchema = Joi.object({
+  richContent: richContentSchema.required(),
+  threadId: Joi.string()
+    .guid({ version: 'uuidv4' })
+    .required()
+    .messages({
+      'string.guid': 'Invalid thread ID format',
+      'any.required': 'Thread ID is required',
+    }),
+  parentPostId: Joi.string()
+    .guid({ version: 'uuidv4' })
+    .optional()
+    .messages({
+      'string.guid': 'Invalid parent post ID format',
+    }),
+  attachedFiles: Joi.array().items(Joi.string().guid({ version: 'uuidv4' })).optional(),
+});
+
+export const updatePostSchema = Joi.object({
+  richContent: richContentSchema.optional(),
+  attachedFiles: Joi.array().items(Joi.string().guid({ version: 'uuidv4' })).optional(),
+}).min(1);
+
+export const paginationSchema = Joi.object({
+  page: Joi.number().integer().min(1).default(1),
+  limit: Joi.number().integer().min(1).max(100).default(20),
+  sortBy: Joi.string().optional(),
+  sortOrder: Joi.string().valid('asc', 'desc').default('desc'),
+});
+
+export const searchSchema = Joi.object({
+  query: Joi.string()
+    .min(1)
+    .max(200)
+    .required()
+    .messages({
+      'string.min': 'Search query cannot be empty',
+      'string.max': 'Search query must be less than 200 characters',
+      'any.required': 'Search query is required',
+    }),
+  categoryId: Joi.string()
+    .guid({ version: 'uuidv4' })
+    .optional()
+    .messages({
+      'string.guid': 'Invalid category ID format',
+    }),
+  authorId: Joi.string()
+    .guid({ version: 'uuidv4' })
+    .optional()
+    .messages({
+      'string.guid': 'Invalid author ID format',
+    }),
+  dateFrom: Joi.date().iso().optional(),
+  dateTo: Joi.date().iso().optional(),
+});
+
+export const validateSchema = (schema: Joi.ObjectSchema) => {
+  return (req: Request, res: Response, next: NextFunction): void => {
+    const { error, value } = schema.validate(req.body, {
+      abortEarly: false,
+      stripUnknown: true,
+    });
+
+    if (error) {
+      const errorDetails = error.details.map((detail) => ({
+        field: detail.path.join('.'),
+        message: detail.message,
+      }));
+
+      res.status(400).json({
+        success: false,
+        error: 'Validation failed',
+        details: errorDetails,
+      });
+      return;
+    }
+
+    req.body = value;
+    next();
+  };
+};
+
+export const validateQuery = (schema: Joi.ObjectSchema) => {
+  return (req: Request, res: Response, next: NextFunction): void => {
+    const { error, value } = schema.validate(req.query, {
+      abortEarly: false,
+      stripUnknown: true,
+      convert: true,
+    });
+
+    if (error) {
+      const errorDetails = error.details.map((detail) => ({
+        field: detail.path.join('.'),
+        message: detail.message,
+      }));
+
+      res.status(400).json({
+        success: false,
+        error: 'Query validation failed',
+        details: errorDetails,
+      });
+      return;
+    }
+
+    req.query = value;
+    next();
+  };
+};
+
+export const isValidRichContent = (content: any): content is RichContent => {
+  if (!content || typeof content !== 'object') {
+    return false;
+  }
+
+  if (content.type !== 'doc' || !Array.isArray(content.content)) {
+    return false;
+  }
+
+  return true;
+};
+
+export const sanitizeRichContentText = (content: RichContent): string => {
+  const extractText = (nodes: any[]): string => {
+    return nodes
+      .map((node) => {
+        if (node.text) {
+          return node.text;
+        }
+        if (node.content) {
+          return extractText(node.content);
+        }
+        return '';
+      })
+      .join(' ');
+  };
+
+  return extractText(content.content).trim();
+};

backend/tsconfig.json

@@ -0,0 +1,34 @@
+{
+  "compilerOptions": {
+    "target": "es2020",
+    "module": "commonjs",
+    "lib": ["es2020"],
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "strict": true,
+    "moduleResolution": "node",
+    "importHelpers": true,
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "removeComments": false,
+    "resolveJsonModule": true,
+    "typeRoots": ["node_modules/@types"],
+    "types": ["node"]
+  },
+  "include": [
+    "src/**/*"
+  ],
+  "exclude": [
+    "node_modules",
+    "dist",
+    "**/*.test.ts",
+    "**/*.spec.ts"
+  ]
+}

frontend/.env

@@ -0,0 +1 @@
+VITE_API_URL=http://localhost:3000/api

frontend/.gitignore

@@ -0,0 +1,24 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

frontend/README.md

@@ -0,0 +1,69 @@
+# React + TypeScript + Vite
+
+This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+
+Currently, two official plugins are available:
+
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) for Fast Refresh
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+
+## Expanding the ESLint configuration
+
+If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
+
+```js
+export default tseslint.config([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+
+      // Remove tseslint.configs.recommended and replace with this
+      ...tseslint.configs.recommendedTypeChecked,
+      // Alternatively, use this for stricter rules
+      ...tseslint.configs.strictTypeChecked,
+      // Optionally, add this for stylistic rules
+      ...tseslint.configs.stylisticTypeChecked,
+
+      // Other configs...
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```
+
+You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
+
+```js
+// eslint.config.js
+import reactX from 'eslint-plugin-react-x'
+import reactDom from 'eslint-plugin-react-dom'
+
+export default tseslint.config([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+      // Enable lint rules for React
+      reactX.configs['recommended-typescript'],
+      // Enable lint rules for React DOM
+      reactDom.configs.recommended,
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```

frontend/eslint.config.js

@@ -0,0 +1,23 @@
+import js from '@eslint/js'
+import globals from 'globals'
+import reactHooks from 'eslint-plugin-react-hooks'
+import reactRefresh from 'eslint-plugin-react-refresh'
+import tseslint from 'typescript-eslint'
+import { globalIgnores } from 'eslint/config'
+
+export default tseslint.config([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      js.configs.recommended,
+      tseslint.configs.recommended,
+      reactHooks.configs['recommended-latest'],
+      reactRefresh.configs.vite,
+    ],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+    },
+  },
+])

frontend/index.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Vite + React + TS</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>

frontend/package.json

@@ -0,0 +1,51 @@
+{
+  "name": "frontend",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "lint": "eslint .",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@tailwindcss/postcss": "^4.1.12",
+    "@tailwindcss/typography": "^0.5.16",
+    "@tiptap/extension-code-block-lowlight": "^3.3.1",
+    "@tiptap/extension-color": "^3.3.1",
+    "@tiptap/extension-highlight": "^3.3.1",
+    "@tiptap/extension-image": "^3.3.1",
+    "@tiptap/extension-link": "^3.3.1",
+    "@tiptap/extension-mention": "^3.3.1",
+    "@tiptap/extension-text-style": "^3.3.1",
+    "@tiptap/pm": "^3.3.1",
+    "@tiptap/react": "^3.3.1",
+    "@tiptap/starter-kit": "^3.3.1",
+    "@types/axios": "^0.9.36",
+    "@types/react-router-dom": "^5.3.3",
+    "autoprefixer": "^10.4.21",
+    "aws-sdk": "^2.1692.0",
+    "axios": "^1.11.0",
+    "lowlight": "^3.3.0",
+    "lucide-react": "^0.542.0",
+    "postcss": "^8.5.6",
+    "react": "^19.1.1",
+    "react-dom": "^19.1.1",
+    "react-router-dom": "^7.8.2",
+    "tailwindcss": "^4.1.12"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.33.0",
+    "@types/react": "^19.1.10",
+    "@types/react-dom": "^19.1.7",
+    "@vitejs/plugin-react": "^5.0.0",
+    "eslint": "^9.33.0",
+    "eslint-plugin-react-hooks": "^5.2.0",
+    "eslint-plugin-react-refresh": "^0.4.20",
+    "globals": "^16.3.0",
+    "typescript": "~5.8.3",
+    "typescript-eslint": "^8.39.1",
+    "vite": "^7.1.2"
+  }
+}

frontend/postcss.config.js

@@ -0,0 +1,6 @@
+export default {
+  plugins: {
+    '@tailwindcss/postcss': {},
+    autoprefixer: {},
+  },
+}

frontend/public/vite.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>

frontend/src/App.css

@@ -0,0 +1,42 @@
+#root {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+  text-align: center;
+}
+
+.logo {
+  height: 6em;
+  padding: 1.5em;
+  will-change: filter;
+  transition: filter 300ms;
+}
+.logo:hover {
+  filter: drop-shadow(0 0 2em #646cffaa);
+}
+.logo.react:hover {
+  filter: drop-shadow(0 0 2em #61dafbaa);
+}
+
+@keyframes logo-spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  a:nth-of-type(2) .logo {
+    animation: logo-spin infinite 20s linear;
+  }
+}
+
+.card {
+  padding: 2em;
+}
+
+.read-the-docs {
+  color: #888;
+}

frontend/src/App.tsx

@@ -0,0 +1,62 @@
+import React from 'react';
+import { BrowserRouter as Router, Routes, Route } from 'react-router-dom';
+import { AuthProvider } from './contexts/MockAuthContext';
+import Header from './components/Header';
+import Home from './pages/Home';
+import Login from './pages/Login';
+import Register from './pages/Register';
+import Categories from './pages/Categories';
+import CategoryDetail from './pages/CategoryDetail';
+import ThreadDetail from './pages/ThreadDetail';
+import CreateThread from './pages/CreateThread';
+import Profile from './pages/Profile';
+import Settings from './pages/Settings';
+import ProtectedRoute from './components/ProtectedRoute';
+
+const App: React.FC = () => {
+  return (
+    <AuthProvider>
+      <Router>
+        <div className="min-h-screen bg-lfg-rich-black text-lfg-lavender">
+          <Header />
+          <main>
+            <Routes>
+              <Route path="/" element={<Home />} />
+              <Route path="/login" element={<Login />} />
+              <Route path="/register" element={<Register />} />
+              <Route path="/categories" element={<Categories />} />
+              <Route path="/categories/:categoryId" element={<CategoryDetail />} />
+              <Route path="/threads/:threadId" element={<ThreadDetail />} />
+              <Route 
+                path="/threads/new" 
+                element={
+                  <ProtectedRoute>
+                    <CreateThread />
+                  </ProtectedRoute>
+                } 
+              />
+              <Route 
+                path="/profile/:userId" 
+                element={
+                  <ProtectedRoute>
+                    <Profile />
+                  </ProtectedRoute>
+                } 
+              />
+              <Route 
+                path="/settings" 
+                element={
+                  <ProtectedRoute>
+                    <Settings />
+                  </ProtectedRoute>
+                } 
+              />
+            </Routes>
+          </main>
+        </div>
+      </Router>
+    </AuthProvider>
+  );
+};
+
+export default App;

frontend/src/assets/react.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="35.93" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 228"><path fill="#00D8FF" d="M210.483 73.824a171.49 171.49 0 0 0-8.24-2.597c.465-1.9.893-3.777 1.273-5.621c6.238-30.281 2.16-54.676-11.769-62.708c-13.355-7.7-35.196.329-57.254 19.526a171.23 171.23 0 0 0-6.375 5.848a155.866 155.866 0 0 0-4.241-3.917C100.759 3.829 77.587-4.822 63.673 3.233C50.33 10.957 46.379 33.89 51.995 62.588a170.974 170.974 0 0 0 1.892 8.48c-3.28.932-6.445 1.924-9.474 2.98C17.309 83.498 0 98.307 0 113.668c0 15.865 18.582 31.778 46.812 41.427a145.52 145.52 0 0 0 6.921 2.165a167.467 167.467 0 0 0-2.01 9.138c-5.354 28.2-1.173 50.591 12.134 58.266c13.744 7.926 36.812-.22 59.273-19.855a145.567 145.567 0 0 0 5.342-4.923a168.064 168.064 0 0 0 6.92 6.314c21.758 18.722 43.246 26.282 56.54 18.586c13.731-7.949 18.194-32.003 12.4-61.268a145.016 145.016 0 0 0-1.535-6.842c1.62-.48 3.21-.974 4.76-1.488c29.348-9.723 48.443-25.443 48.443-41.52c0-15.417-17.868-30.326-45.517-39.844Zm-6.365 70.984c-1.4.463-2.836.91-4.3 1.345c-3.24-10.257-7.612-21.163-12.963-32.432c5.106-11 9.31-21.767 12.459-31.957c2.619.758 5.16 1.557 7.61 2.4c23.69 8.156 38.14 20.213 38.14 29.504c0 9.896-15.606 22.743-40.946 31.14Zm-10.514 20.834c2.562 12.94 2.927 24.64 1.23 33.787c-1.524 8.219-4.59 13.698-8.382 15.893c-8.067 4.67-25.32-1.4-43.927-17.412a156.726 156.726 0 0 1-6.437-5.87c7.214-7.889 14.423-17.06 21.459-27.246c12.376-1.098 24.068-2.894 34.671-5.345a134.17 134.17 0 0 1 1.386 6.193ZM87.276 214.515c-7.882 2.783-14.16 2.863-17.955.675c-8.075-4.657-11.432-22.636-6.853-46.752a156.923 156.923 0 0 1 1.869-8.499c10.486 2.32 22.093 3.988 34.498 4.994c7.084 9.967 14.501 19.128 21.976 27.15a134.668 134.668 0 0 1-4.877 4.492c-9.933 8.682-19.886 14.842-28.658 17.94ZM50.35 144.747c-12.483-4.267-22.792-9.812-29.858-15.863c-6.35-5.437-9.555-10.836-9.555-15.216c0-9.322 13.897-21.212 37.076-29.293c2.813-.98 5.757-1.905 8.812-2.773c3.204 10.42 7.406 21.315 12.477 32.332c-5.137 11.18-9.399 22.249-12.634 32.792a134.718 134.718 0 0 1-6.318-1.979Zm12.378-84.26c-4.811-24.587-1.616-43.134 6.425-47.789c8.564-4.958 27.502 2.111 47.463 19.835a144.318 144.318 0 0 1 3.841 3.545c-7.438 7.987-14.787 17.08-21.808 26.988c-12.04 1.116-23.565 2.908-34.161 5.309a160.342 160.342 0 0 1-1.76-7.887Zm110.427 27.268a347.8 347.8 0 0 0-7.785-12.803c8.168 1.033 15.994 2.404 23.343 4.08c-2.206 7.072-4.956 14.465-8.193 22.045a381.151 381.151 0 0 0-7.365-13.322Zm-45.032-43.861c5.044 5.465 10.096 11.566 15.065 18.186a322.04 322.04 0 0 0-30.257-.006c4.974-6.559 10.069-12.652 15.192-18.18ZM82.802 87.83a323.167 323.167 0 0 0-7.227 13.238c-3.184-7.553-5.909-14.98-8.134-22.152c7.304-1.634 15.093-2.97 23.209-3.984a321.524 321.524 0 0 0-7.848 12.897Zm8.081 65.352c-8.385-.936-16.291-2.203-23.593-3.793c2.26-7.3 5.045-14.885 8.298-22.6a321.187 321.187 0 0 0 7.257 13.246c2.594 4.48 5.28 8.868 8.038 13.147Zm37.542 31.03c-5.184-5.592-10.354-11.779-15.403-18.433c4.902.192 9.899.29 14.978.29c5.218 0 10.376-.117 15.453-.343c-4.985 6.774-10.018 12.97-15.028 18.486Zm52.198-57.817c3.422 7.8 6.306 15.345 8.596 22.52c-7.422 1.694-15.436 3.058-23.88 4.071a382.417 382.417 0 0 0 7.859-13.026a347.403 347.403 0 0 0 7.425-13.565Zm-16.898 8.101a358.557 358.557 0 0 1-12.281 19.815a329.4 329.4 0 0 1-23.444.823c-7.967 0-15.716-.248-23.178-.732a310.202 310.202 0 0 1-12.513-19.846h.001a307.41 307.41 0 0 1-10.923-20.627a310.278 310.278 0 0 1 10.89-20.637l-.001.001a307.318 307.318 0 0 1 12.413-19.761c7.613-.576 15.42-.876 23.31-.876H128c7.926 0 15.743.303 23.354.883a329.357 329.357 0 0 1 12.335 19.695a358.489 358.489 0 0 1 11.036 20.54a329.472 329.472 0 0 1-11 20.722Zm22.56-122.124c8.572 4.944 11.906 24.881 6.52 51.026c-.344 1.668-.73 3.367-1.15 5.09c-10.622-2.452-22.155-4.275-34.23-5.408c-7.034-10.017-14.323-19.124-21.64-27.008a160.789 160.789 0 0 1 5.888-5.4c18.9-16.447 36.564-22.941 44.612-18.3ZM128 90.808c12.625 0 22.86 10.235 22.86 22.86s-10.235 22.86-22.86 22.86s-22.86-10.235-22.86-22.86s10.235-22.86 22.86-22.86Z"></path></svg>

frontend/src/components/CategoryCard.tsx

@@ -0,0 +1,73 @@
+import React from 'react';
+import { Link } from 'react-router-dom';
+import { MessageCircle, Clock, Users } from 'lucide-react';
+import { type Category } from '../types/index';
+
+interface CategoryCardProps {
+  category: Category;
+}
+
+const CategoryCard: React.FC<CategoryCardProps> = ({ category }) => {
+  const formatDate = (dateString: string) => {
+    const date = new Date(dateString);
+    const now = new Date();
+    const diffInHours = Math.floor((now.getTime() - date.getTime()) / (1000 * 60 * 60));
+
+    if (diffInHours < 1) {
+      return 'Just now';
+    } else if (diffInHours < 24) {
+      return `${diffInHours}h ago`;
+    } else if (diffInHours < 168) {
+      return `${Math.floor(diffInHours / 24)}d ago`;
+    } else {
+      return date.toLocaleDateString();
+    }
+  };
+
+  return (
+    <Link
+      to={`/categories/${category.categoryId}`}
+      className="block group transition-all duration-200 hover:scale-105"
+    >
+      <div className="bg-lfg-oxford border border-lfg-charcoal rounded-lg p-6 hover:border-lfg-lavender hover:shadow-lg hover:shadow-lfg-lavender/10 transition-all duration-200">
+        <div className="flex items-start justify-between mb-4">
+          <div className="flex-1">
+            <h3 className="text-xl font-semibold text-lfg-lavender group-hover:text-white transition-colors mb-2">
+              {category.name}
+            </h3>
+            <p className="text-lfg-charcoal group-hover:text-lfg-lavender transition-colors line-clamp-2">
+              {category.description}
+            </p>
+          </div>
+          <div className="ml-4 p-3 bg-lfg-rich-black rounded-lg">
+            <MessageCircle size={24} className="text-lfg-lavender" />
+          </div>
+        </div>
+
+        <div className="flex items-center justify-between text-sm">
+          <div className="flex items-center space-x-4 text-lfg-charcoal">
+            <div className="flex items-center space-x-1">
+              <Users size={16} />
+              <span>{category.threadCount || 0} threads</span>
+            </div>
+          </div>
+          
+          {category.lastActivity && (
+            <div className="flex items-center space-x-1 text-lfg-charcoal">
+              <Clock size={16} />
+              <span>{formatDate(category.lastActivity)}</span>
+            </div>
+          )}
+        </div>
+
+        <div className="mt-4 flex justify-end">
+          <div className="px-3 py-1 bg-lfg-lavender text-lfg-black text-sm rounded-full font-medium opacity-0 group-hover:opacity-100 transition-opacity duration-200">
+            View Category
+          </div>
+        </div>
+      </div>
+    </Link>
+  );
+};
+
+export default CategoryCard;

frontend/src/components/Header.tsx

@@ -0,0 +1,158 @@
+import React from 'react';
+import { Link, useNavigate } from 'react-router-dom';
+import { Search, User, LogOut, Settings, Bell } from 'lucide-react';
+import { useAuth } from '../contexts/MockAuthContext';
+
+const Header: React.FC = () => {
+  const { user, logout } = useAuth();
+  const navigate = useNavigate();
+
+  const handleLogout = () => {
+    logout();
+    navigate('/');
+  };
+
+  return (
+    <header className="bg-lfg-rich-black border-b border-lfg-oxford sticky top-0 z-50">
+      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+        <div className="flex items-center justify-between h-16">
+          <div className="flex items-center space-x-8">
+            <Link 
+              to="/" 
+              className="text-2xl font-bold text-lfg-lavender hover:text-white transition-colors"
+            >
+              LFG9 Forums
+            </Link>
+            
+            <nav className="hidden md:flex items-center space-x-6">
+              <Link 
+                to="/categories" 
+                className="text-lfg-lavender hover:text-white transition-colors"
+              >
+                Categories
+              </Link>
+              <Link 
+                to="/recent" 
+                className="text-lfg-lavender hover:text-white transition-colors"
+              >
+                Recent
+              </Link>
+              {user?.isAdmin && (
+                <Link 
+                  to="/admin" 
+                  className="text-lfg-lavender hover:text-white transition-colors"
+                >
+                  Admin
+                </Link>
+              )}
+            </nav>
+          </div>
+
+          <div className="flex items-center space-x-4">
+            <div className="relative">
+              <input
+                type="text"
+                placeholder="Search forums..."
+                className="
+                  w-64 px-4 py-2 pl-10 pr-4 
+                  bg-lfg-oxford border border-lfg-charcoal rounded-lg
+                  text-lfg-lavender placeholder-lfg-charcoal
+                  focus:outline-none focus:ring-2 focus:ring-lfg-lavender focus:ring-opacity-50
+                  transition-all duration-200
+                "
+              />
+              <Search 
+                size={20} 
+                className="absolute left-3 top-1/2 transform -translate-y-1/2 text-lfg-charcoal" 
+              />
+            </div>
+
+            {user ? (
+              <div className="flex items-center space-x-3">
+                <button className="p-2 text-lfg-lavender hover:text-white hover:bg-lfg-oxford rounded-lg transition-all duration-200">
+                  <Bell size={20} />
+                </button>
+                
+                <div className="relative group">
+                  <button className="flex items-center space-x-2 p-2 text-lfg-lavender hover:text-white hover:bg-lfg-oxford rounded-lg transition-all duration-200">
+                    <User size={20} />
+                    <span className="hidden sm:inline">{user.username}</span>
+                  </button>
+                  
+                  <div className="absolute right-0 mt-2 w-48 bg-lfg-oxford border border-lfg-charcoal rounded-lg shadow-lg opacity-0 invisible group-hover:opacity-100 group-hover:visible transition-all duration-200">
+                    <div className="py-2">
+                      <Link
+                        to={`/profile/${user.userId}`}
+                        className="flex items-center px-4 py-2 text-sm text-lfg-lavender hover:bg-lfg-charcoal hover:text-white transition-colors"
+                      >
+                        <User size={16} className="mr-2" />
+                        Profile
+                      </Link>
+                      <Link
+                        to="/settings"
+                        className="flex items-center px-4 py-2 text-sm text-lfg-lavender hover:bg-lfg-charcoal hover:text-white transition-colors"
+                      >
+                        <Settings size={16} className="mr-2" />
+                        Settings
+                      </Link>
+                      <div className="border-t border-lfg-charcoal my-1"></div>
+                      <button
+                        onClick={handleLogout}
+                        className="flex items-center w-full px-4 py-2 text-sm text-lfg-lavender hover:bg-lfg-charcoal hover:text-white transition-colors"
+                      >
+                        <LogOut size={16} className="mr-2" />
+                        Logout
+                      </button>
+                    </div>
+                  </div>
+                </div>
+              </div>
+            ) : (
+              <div className="flex items-center space-x-3">
+                <Link
+                  to="/login"
+                  className="px-4 py-2 text-lfg-lavender hover:text-white transition-colors"
+                >
+                  Login
+                </Link>
+                <Link
+                  to="/register"
+                  className="px-4 py-2 bg-lfg-lavender text-lfg-black rounded-lg hover:bg-white transition-colors font-medium"
+                >
+                  Sign Up
+                </Link>
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+
+      <div className="md:hidden border-t border-lfg-oxford">
+        <nav className="px-4 py-3 space-y-2">
+          <Link 
+            to="/categories" 
+            className="block text-lfg-lavender hover:text-white transition-colors"
+          >
+            Categories
+          </Link>
+          <Link 
+            to="/recent" 
+            className="block text-lfg-lavender hover:text-white transition-colors"
+          >
+            Recent
+          </Link>
+          {user?.isAdmin && (
+            <Link 
+              to="/admin" 
+              className="block text-lfg-lavender hover:text-white transition-colors"
+            >
+              Admin
+            </Link>
+          )}
+        </nav>
+      </div>
+    </header>
+  );
+};
+
+export default Header;

frontend/src/components/ProtectedRoute.tsx

@@ -0,0 +1,33 @@
+import React from 'react';
+import { Navigate, useLocation } from 'react-router-dom';
+import { useAuth } from '../contexts/MockAuthContext';
+
+interface ProtectedRouteProps {
+  children: React.ReactNode;
+  requireAdmin?: boolean;
+}
+
+const ProtectedRoute: React.FC<ProtectedRouteProps> = ({ children, requireAdmin = false }) => {
+  const { isAuthenticated, user, loading } = useAuth();
+  const location = useLocation();
+
+  if (loading) {
+    return (
+      <div className="min-h-screen bg-lfg-rich-black flex items-center justify-center">
+        <div className="loading-spinner w-8 h-8"></div>
+      </div>
+    );
+  }
+
+  if (!isAuthenticated) {
+    return <Navigate to="/login" state={{ from: location }} replace />;
+  }
+
+  if (requireAdmin && !user?.isAdmin) {
+    return <Navigate to="/" replace />;
+  }
+
+  return <>{children}</>;
+};
+
+export default ProtectedRoute;

frontend/src/components/RichTextEditor.tsx

@@ -0,0 +1,285 @@
+import React, { useCallback } from 'react';
+import { useEditor, EditorContent } from '@tiptap/react';
+import StarterKit from '@tiptap/starter-kit';
+import Image from '@tiptap/extension-image';
+import Link from '@tiptap/extension-link';
+import Highlight from '@tiptap/extension-highlight';
+import TextStyle from '@tiptap/extension-text-style';
+import Color from '@tiptap/extension-color';
+import CodeBlockLowlight from '@tiptap/extension-code-block-lowlight';
+import { lowlight } from 'lowlight';
+import {
+  Bold,
+  Italic,
+  Underline,
+  Strikethrough,
+  Code,
+  Quote,
+  List,
+  ListOrdered,
+  Image as ImageIcon,
+  Link as LinkIcon,
+  Undo,
+  Redo,
+} from 'lucide-react';
+
+interface RichTextEditorProps {
+  content?: any;
+  onChange?: (content: any) => void;
+  placeholder?: string;
+  editable?: boolean;
+  className?: string;
+}
+
+const MenuButton: React.FC<{
+  onClick: () => void;
+  isActive?: boolean;
+  disabled?: boolean;
+  children: React.ReactNode;
+  title?: string;
+}> = ({ onClick, isActive, disabled, children, title }) => (
+  <button
+    type="button"
+    onClick={onClick}
+    disabled={disabled}
+    title={title}
+    className={`
+      p-2 rounded-md text-sm font-medium transition-all duration-200
+      ${isActive 
+        ? 'bg-lfg-lavender text-lfg-black' 
+        : 'text-lfg-lavender hover:bg-lfg-oxford hover:text-white'
+      }
+      ${disabled 
+        ? 'opacity-50 cursor-not-allowed' 
+        : 'hover:scale-105'
+      }
+      focus:outline-none focus:ring-2 focus:ring-lfg-lavender focus:ring-opacity-50
+    `}
+  >
+    {children}
+  </button>
+);
+
+const RichTextEditor: React.FC<RichTextEditorProps> = ({
+  content,
+  onChange,
+  placeholder = 'Start writing...',
+  editable = true,
+  className = '',
+}) => {
+  const editor = useEditor({
+    extensions: [
+      StarterKit.configure({
+        codeBlock: false,
+      }),
+      Image.configure({
+        HTMLAttributes: {
+          class: 'max-w-full h-auto rounded-lg',
+        },
+      }),
+      Link.configure({
+        openOnClick: false,
+        HTMLAttributes: {
+          class: 'text-lfg-lavender hover:text-white underline',
+        },
+      }),
+      Highlight.configure({
+        HTMLAttributes: {
+          class: 'bg-lfg-lavender text-lfg-black px-1 rounded',
+        },
+      }),
+      TextStyle,
+      Color,
+      CodeBlockLowlight.configure({
+        lowlight,
+        HTMLAttributes: {
+          class: 'bg-lfg-black text-lfg-lavender p-4 rounded-lg overflow-x-auto',
+        },
+      }),
+    ],
+    content,
+    editable,
+    onUpdate: ({ editor }) => {
+      onChange?.(editor.getJSON());
+    },
+  });
+
+  const addImage = useCallback(() => {
+    const url = window.prompt('Enter image URL:');
+    if (url && editor) {
+      editor.chain().focus().setImage({ src: url }).run();
+    }
+  }, [editor]);
+
+  const setLink = useCallback(() => {
+    const previousUrl = editor?.getAttributes('link').href;
+    const url = window.prompt('Enter URL:', previousUrl);
+
+    if (url === null) {
+      return;
+    }
+
+    if (url === '') {
+      editor?.chain().focus().extendMarkRange('link').unsetLink().run();
+      return;
+    }
+
+    editor?.chain().focus().extendMarkRange('link').setLink({ href: url }).run();
+  }, [editor]);
+
+  if (!editor) {
+    return <div className="animate-pulse bg-lfg-oxford h-32 rounded-lg"></div>;
+  }
+
+  return (
+    <div className={`border border-lfg-oxford rounded-lg bg-lfg-rich-black ${className}`}>
+      {editable && (
+        <div className="border-b border-lfg-oxford p-2 flex flex-wrap gap-1">
+          <MenuButton
+            onClick={() => editor.chain().focus().toggleBold().run()}
+            isActive={editor.isActive('bold')}
+            title="Bold"
+          >
+            <Bold size={16} />
+          </MenuButton>
+          
+          <MenuButton
+            onClick={() => editor.chain().focus().toggleItalic().run()}
+            isActive={editor.isActive('italic')}
+            title="Italic"
+          >
+            <Italic size={16} />
+          </MenuButton>
+          
+          <MenuButton
+            onClick={() => editor.chain().focus().toggleStrike().run()}
+            isActive={editor.isActive('strike')}
+            title="Strikethrough"
+          >
+            <Strikethrough size={16} />
+          </MenuButton>
+          
+          <MenuButton
+            onClick={() => editor.chain().focus().toggleCode().run()}
+            isActive={editor.isActive('code')}
+            title="Code"
+          >
+            <Code size={16} />
+          </MenuButton>
+
+          <div className="w-px bg-lfg-charcoal mx-1"></div>
+
+          <MenuButton
+            onClick={() => editor.chain().focus().toggleHeading({ level: 1 }).run()}
+            isActive={editor.isActive('heading', { level: 1 })}
+            title="Heading 1"
+          >
+            H1
+          </MenuButton>
+          
+          <MenuButton
+            onClick={() => editor.chain().focus().toggleHeading({ level: 2 }).run()}
+            isActive={editor.isActive('heading', { level: 2 })}
+            title="Heading 2"
+          >
+            H2
+          </MenuButton>
+          
+          <MenuButton
+            onClick={() => editor.chain().focus().toggleHeading({ level: 3 }).run()}
+            isActive={editor.isActive('heading', { level: 3 })}
+            title="Heading 3"
+          >
+            H3
+          </MenuButton>
+
+          <div className="w-px bg-lfg-charcoal mx-1"></div>
+
+          <MenuButton
+            onClick={() => editor.chain().focus().toggleBulletList().run()}
+            isActive={editor.isActive('bulletList')}
+            title="Bullet List"
+          >
+            <List size={16} />
+          </MenuButton>
+          
+          <MenuButton
+            onClick={() => editor.chain().focus().toggleOrderedList().run()}
+            isActive={editor.isActive('orderedList')}
+            title="Numbered List"
+          >
+            <ListOrdered size={16} />
+          </MenuButton>
+          
+          <MenuButton
+            onClick={() => editor.chain().focus().toggleBlockquote().run()}
+            isActive={editor.isActive('blockquote')}
+            title="Quote"
+          >
+            <Quote size={16} />
+          </MenuButton>
+
+          <div className="w-px bg-lfg-charcoal mx-1"></div>
+
+          <MenuButton
+            onClick={setLink}
+            isActive={editor.isActive('link')}
+            title="Add Link"
+          >
+            <LinkIcon size={16} />
+          </MenuButton>
+          
+          <MenuButton
+            onClick={addImage}
+            title="Add Image"
+          >
+            <ImageIcon size={16} />
+          </MenuButton>
+
+          <div className="w-px bg-lfg-charcoal mx-1"></div>
+
+          <MenuButton
+            onClick={() => editor.chain().focus().undo().run()}
+            disabled={!editor.can().chain().focus().undo().run()}
+            title="Undo"
+          >
+            <Undo size={16} />
+          </MenuButton>
+          
+          <MenuButton
+            onClick={() => editor.chain().focus().redo().run()}
+            disabled={!editor.can().chain().focus().redo().run()}
+            title="Redo"
+          >
+            <Redo size={16} />
+          </MenuButton>
+        </div>
+      )}
+      
+      <EditorContent 
+        editor={editor} 
+        className={`
+          prose prose-invert max-w-none p-4
+          prose-headings:text-lfg-lavender prose-p:text-lfg-lavender
+          prose-strong:text-lfg-lavender prose-code:text-lfg-lavender
+          prose-blockquote:border-lfg-lavender prose-blockquote:text-lfg-charcoal
+          prose-li:text-lfg-lavender prose-a:text-lfg-lavender
+          focus-within:ring-2 focus-within:ring-lfg-lavender focus-within:ring-opacity-50
+        `}
+      />
+      
+      {editable && (
+        <div className="px-4 py-2 text-xs text-lfg-charcoal border-t border-lfg-oxford">
+          <p>
+            Tips: Use <kbd className="bg-lfg-oxford px-1 rounded text-lfg-lavender">**bold**</kbd>,{' '}
+            <kbd className="bg-lfg-oxford px-1 rounded text-lfg-lavender">*italic*</kbd>,{' '}
+            <kbd className="bg-lfg-oxford px-1 rounded text-lfg-lavender">`code`</kbd>,{' '}
+            or paste images directly
+          </p>
+        </div>
+      )}
+    </div>
+  );
+};
+
+export default RichTextEditor;

frontend/src/components/ThreadCard.tsx

@@ -0,0 +1,107 @@
+import React from 'react';
+import { Link } from 'react-router-dom';
+import { MessageCircle, User, Clock, Pin, Lock } from 'lucide-react';
+import { type Thread } from '../types/index';
+
+interface ThreadCardProps {
+  thread: Thread;
+}
+
+const ThreadCard: React.FC<ThreadCardProps> = ({ thread }) => {
+  const formatDate = (dateString: string) => {
+    const date = new Date(dateString);
+    const now = new Date();
+    const diffInHours = Math.floor((now.getTime() - date.getTime()) / (1000 * 60 * 60));
+
+    if (diffInHours < 1) {
+      return 'Just now';
+    } else if (diffInHours < 24) {
+      return `${diffInHours}h ago`;
+    } else if (diffInHours < 168) {
+      return `${Math.floor(diffInHours / 24)}d ago`;
+    } else {
+      return date.toLocaleDateString();
+    }
+  };
+
+  const getContentPreview = (content: any): string => {
+    if (!content || !content.content) return '';
+    
+    const extractText = (nodes: any[]): string => {
+      return nodes
+        .map((node) => {
+          if (node.text) return node.text;
+          if (node.content) return extractText(node.content);
+          return '';
+        })
+        .join(' ');
+    };
+
+    const text = extractText(content.content);
+    return text.length > 150 ? `${text.substring(0, 150)}...` : text;
+  };
+
+  return (
+    <Link
+      to={`/threads/${thread.threadId}`}
+      className="block group transition-all duration-200"
+    >
+      <div className="bg-lfg-oxford border border-lfg-charcoal rounded-lg p-6 hover:border-lfg-lavender hover:shadow-md hover:shadow-lfg-lavender/10 transition-all duration-200">
+        <div className="flex items-start space-x-4">
+          <div className="flex-shrink-0 p-2 bg-lfg-rich-black rounded-lg">
+            <MessageCircle size={20} className="text-lfg-lavender" />
+          </div>
+
+          <div className="flex-1 min-w-0">
+            <div className="flex items-center space-x-2 mb-1">
+              {thread.isPinned && (
+                <Pin size={16} className="text-lfg-lavender" />
+              )}
+              {thread.isLocked && (
+                <Lock size={16} className="text-lfg-charcoal" />
+              )}
+              <h3 className="text-lg font-semibold text-lfg-lavender group-hover:text-white transition-colors truncate">
+                {thread.title}
+              </h3>
+            </div>
+
+            {getContentPreview(thread.richContent) && (
+              <p className="text-lfg-charcoal text-sm mb-3 line-clamp-2">
+                {getContentPreview(thread.richContent)}
+              </p>
+            )}
+
+            <div className="flex items-center justify-between text-xs text-lfg-charcoal">
+              <div className="flex items-center space-x-4">
+                <div className="flex items-center space-x-1">
+                  <User size={14} />
+                  <span>{thread.authorUsername}</span>
+                </div>
+                <div className="flex items-center space-x-1">
+                  <MessageCircle size={14} />
+                  <span>{thread.postCount || 0} replies</span>
+                </div>
+              </div>
+              
+              <div className="flex items-center space-x-1">
+                <Clock size={14} />
+                <span>{formatDate(thread.lastPostAt || thread.updatedAt)}</span>
+              </div>
+            </div>
+          </div>
+        </div>
+
+        {thread.attachedFiles && thread.attachedFiles.length > 0 && (
+          <div className="mt-3 pt-3 border-t border-lfg-charcoal">
+            <div className="flex items-center space-x-1 text-xs text-lfg-charcoal">
+              <span>📎</span>
+              <span>{thread.attachedFiles.length} attachment{thread.attachedFiles.length > 1 ? 's' : ''}</span>
+            </div>
+          </div>
+        )}
+      </div>
+    </Link>
+  );
+};
+
+export default ThreadCard;

frontend/src/contexts/AuthContext.tsx

@@ -0,0 +1,132 @@
+import React, { createContext, useContext, useState, useEffect, ReactNode } from 'react';
+import { AuthUser, ApiResponse } from '../types';
+
+interface AuthContextType {
+  user: AuthUser | null;
+  login: (email: string, password: string) => Promise<void>;
+  register: (username: string, email: string, password: string) => Promise<void>;
+  logout: () => void;
+  loading: boolean;
+  isAuthenticated: boolean;
+}
+
+const AuthContext = createContext<AuthContextType | undefined>(undefined);
+
+export const useAuth = (): AuthContextType => {
+  const context = useContext(AuthContext);
+  if (!context) {
+    throw new Error('useAuth must be used within an AuthProvider');
+  }
+  return context;
+};
+
+interface AuthProviderProps {
+  children: ReactNode;
+}
+
+export const AuthProvider: React.FC<AuthProviderProps> = ({ children }) => {
+  const [user, setUser] = useState<AuthUser | null>(null);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    const token = localStorage.getItem('token');
+    const userData = localStorage.getItem('user');
+
+    if (token && userData) {
+      try {
+        const parsedUser = JSON.parse(userData);
+        setUser({
+          ...parsedUser,
+          token,
+        });
+      } catch (error) {
+        localStorage.removeItem('token');
+        localStorage.removeItem('user');
+      }
+    }
+    setLoading(false);
+  }, []);
+
+  const login = async (email: string, password: string): Promise<void> => {
+    setLoading(true);
+    try {
+      const response = await fetch('/api/auth/login', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({ email, password }),
+      });
+
+      const data: ApiResponse<{ user: AuthUser; token: string }> = await response.json();
+
+      if (!data.success || !data.data) {
+        throw new Error(data.error || 'Login failed');
+      }
+
+      const { user: userData, token } = data.data;
+      const authUser: AuthUser = {
+        ...userData,
+        token,
+      };
+
+      setUser(authUser);
+      localStorage.setItem('token', token);
+      localStorage.setItem('user', JSON.stringify(userData));
+    } catch (error) {
+      throw error;
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const register = async (username: string, email: string, password: string): Promise<void> => {
+    setLoading(true);
+    try {
+      const response = await fetch('/api/auth/register', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({ username, email, password }),
+      });
+
+      const data: ApiResponse<{ user: AuthUser; token: string }> = await response.json();
+
+      if (!data.success || !data.data) {
+        throw new Error(data.error || 'Registration failed');
+      }
+
+      const { user: userData, token } = data.data;
+      const authUser: AuthUser = {
+        ...userData,
+        token,
+      };
+
+      setUser(authUser);
+      localStorage.setItem('token', token);
+      localStorage.setItem('user', JSON.stringify(userData));
+    } catch (error) {
+      throw error;
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const logout = (): void => {
+    setUser(null);
+    localStorage.removeItem('token');
+    localStorage.removeItem('user');
+  };
+
+  const value: AuthContextType = {
+    user,
+    login,
+    register,
+    logout,
+    loading,
+    isAuthenticated: !!user,
+  };
+
+  return <AuthContext.Provider value={value}>{children}</AuthContext.Provider>;
+};

frontend/src/contexts/MockAuthContext.tsx

@@ -0,0 +1,102 @@
+import React, { createContext, useContext, useState, ReactNode } from 'react';
+
+export interface AuthUser {
+  userId: string;
+  username: string;
+  email: string;
+  token: string;
+  isAdmin?: boolean;
+}
+
+interface AuthContextType {
+  user: AuthUser | null;
+  login: (email: string, password: string) => Promise<void>;
+  register: (username: string, email: string, password: string) => Promise<void>;
+  logout: () => void;
+  loading: boolean;
+  isAuthenticated: boolean;
+}
+
+const AuthContext = createContext<AuthContextType | undefined>(undefined);
+
+export const useAuth = (): AuthContextType => {
+  const context = useContext(AuthContext);
+  if (!context) {
+    throw new Error('useAuth must be used within an AuthProvider');
+  }
+  return context;
+};
+
+interface AuthProviderProps {
+  children: ReactNode;
+}
+
+// Mock user for testing
+const mockUser: AuthUser = {
+  userId: 'mock-user-id',
+  username: 'TestUser',
+  email: 'test@example.com',
+  token: 'mock-jwt-token',
+  isAdmin: true,
+};
+
+export const AuthProvider: React.FC<AuthProviderProps> = ({ children }) => {
+  const [user, setUser] = useState<AuthUser | null>(null);
+  const [loading, setLoading] = useState(false);
+
+  const login = async (email: string, password: string): Promise<void> => {
+    setLoading(true);
+    try {
+      // Simulate API call delay
+      await new Promise(resolve => setTimeout(resolve, 1000));
+      
+      // Accept any email/password for demo
+      setUser(mockUser);
+      localStorage.setItem('token', mockUser.token);
+      localStorage.setItem('user', JSON.stringify(mockUser));
+    } catch (error) {
+      throw error;
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const register = async (username: string, email: string, password: string): Promise<void> => {
+    setLoading(true);
+    try {
+      // Simulate API call delay
+      await new Promise(resolve => setTimeout(resolve, 1000));
+      
+      const newUser = {
+        ...mockUser,
+        username,
+        email,
+      };
+      
+      setUser(newUser);
+      localStorage.setItem('token', newUser.token);
+      localStorage.setItem('user', JSON.stringify(newUser));
+    } catch (error) {
+      throw error;
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const logout = (): void => {
+    setUser(null);
+    localStorage.removeItem('token');
+    localStorage.removeItem('user');
+  };
+
+  const value: AuthContextType = {
+    user,
+    login,
+    register,
+    logout,
+    loading,
+    isAuthenticated: !!user,
+  };
+
+  return <AuthContext.Provider value={value}>{children}</AuthContext.Provider>;
+};

frontend/src/index.css

@@ -0,0 +1,192 @@
+@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
+
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+* {
+  box-sizing: border-box;
+}
+
+html {
+  scroll-behavior: smooth;
+}
+
+body {
+  margin: 0;
+  padding: 0;
+  font-family: 'Inter', system-ui, sans-serif;
+  background-color: #0C1821;
+  color: #CCC9DC;
+  min-height: 100vh;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+h1, h2, h3, h4, h5, h6 {
+  font-weight: 600;
+  color: #CCC9DC;
+}
+
+a {
+  color: #CCC9DC;
+  text-decoration: none;
+  transition: color 0.2s ease;
+}
+
+a:hover {
+  color: #ffffff;
+}
+
+button:focus,
+input:focus,
+textarea:focus,
+select:focus {
+  outline: none;
+  box-shadow: 0 0 0 2px rgba(204, 201, 220, 0.5);
+}
+
+/* Scrollbar styling */
+::-webkit-scrollbar {
+  width: 8px;
+}
+
+::-webkit-scrollbar-track {
+  background-color: #1B2A41;
+}
+
+::-webkit-scrollbar-thumb {
+  background-color: #324A5F;
+  border-radius: 9999px;
+}
+
+::-webkit-scrollbar-thumb:hover {
+  background-color: #CCC9DC;
+}
+
+/* Rich text editor styles */
+.ProseMirror {
+  background-color: transparent;
+  color: #CCC9DC;
+  min-height: 200px;
+  padding: 1rem;
+  border-radius: 0.5rem;
+  border: 1px solid #1B2A41;
+  outline: none;
+}
+
+.ProseMirror:focus {
+  box-shadow: 0 0 0 2px rgba(204, 201, 220, 0.5);
+}
+
+.ProseMirror h1, .ProseMirror h2, .ProseMirror h3, .ProseMirror h4, .ProseMirror h5, .ProseMirror h6 {
+  font-weight: 700;
+  color: #CCC9DC;
+}
+
+.ProseMirror h1 {
+  font-size: 1.5rem;
+  margin-bottom: 1rem;
+}
+
+.ProseMirror h2 {
+  font-size: 1.25rem;
+  margin-bottom: 0.75rem;
+}
+
+.ProseMirror h3 {
+  font-size: 1.125rem;
+  margin-bottom: 0.5rem;
+}
+
+.ProseMirror blockquote {
+  border-left: 4px solid #CCC9DC;
+  padding-left: 1rem;
+  font-style: italic;
+  color: #324A5F;
+}
+
+.ProseMirror code {
+  background-color: #1B2A41;
+  color: #CCC9DC;
+  padding: 0.125rem 0.25rem;
+  border-radius: 0.25rem;
+  font-size: 0.875rem;
+  font-family: ui-monospace, monospace;
+}
+
+.ProseMirror pre {
+  background-color: #000000;
+  padding: 1rem;
+  border-radius: 0.5rem;
+  overflow-x: auto;
+}
+
+.ProseMirror pre code {
+  background-color: transparent;
+  padding: 0;
+}
+
+.ProseMirror ul, .ProseMirror ol {
+  padding-left: 1.5rem;
+}
+
+.ProseMirror li {
+  margin-bottom: 0.25rem;
+}
+
+.ProseMirror a {
+  color: #CCC9DC;
+  text-decoration: underline;
+}
+
+.ProseMirror a:hover {
+  color: #ffffff;
+}
+
+.ProseMirror img {
+  max-width: 100%;
+  height: auto;
+  border-radius: 0.5rem;
+  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
+}
+
+/* Mention styling */
+.mention {
+  background-color: #CCC9DC;
+  color: #000000;
+  padding: 0.25rem 0.5rem;
+  border-radius: 0.375rem;
+  font-weight: 500;
+}
+
+/* Loading animations */
+.loading-pulse {
+  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
+  background-color: #1B2A41;
+}
+
+.loading-spinner {
+  animation: spin 1s linear infinite;
+  border-radius: 9999px;
+  border: 2px solid #324A5F;
+  border-top-color: #CCC9DC;
+}
+
+@keyframes pulse {
+  0%, 100% {
+    opacity: 1;
+  }
+  50% {
+    opacity: .5;
+  }
+}
+
+@keyframes spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}

frontend/src/main.tsx

@@ -0,0 +1,10 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './index.css'
+import App from './App.tsx'
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)

frontend/src/pages/Categories.tsx

@@ -0,0 +1,206 @@
+import React, { useEffect, useState } from 'react';
+import { Link } from 'react-router-dom';
+import { Plus, Search } from 'lucide-react';
+import CategoryCard from '../components/CategoryCard';
+import { type Category, type ApiResponse } from '../types/index';
+import { useAuth } from '../contexts/MockAuthContext';
+
+const Categories: React.FC = () => {
+  const { user } = useAuth();
+  const [categories, setCategories] = useState<Category[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [searchTerm, setSearchTerm] = useState('');
+
+  useEffect(() => {
+    const fetchCategories = async () => {
+      try {
+        // Mock data for demonstration
+        const mockCategories: Category[] = [
+          {
+            categoryId: '1',
+            name: 'General Gaming',
+            description: 'Discuss all things gaming - from the latest releases to classic favorites.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 45,
+            lastActivity: new Date(Date.now() - 3600000).toISOString(),
+          },
+          {
+            categoryId: '2',
+            name: 'PC Gaming',
+            description: 'Everything related to PC gaming, hardware, and performance optimization.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 32,
+            lastActivity: new Date(Date.now() - 7200000).toISOString(),
+          },
+          {
+            categoryId: '3',
+            name: 'Console Gaming',
+            description: 'PlayStation, Xbox, Nintendo Switch - all console gaming discussions.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 28,
+            lastActivity: new Date(Date.now() - 1800000).toISOString(),
+          },
+          {
+            categoryId: '4',
+            name: 'LFG (Looking for Group)',
+            description: 'Find teammates and gaming partners for multiplayer games.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 67,
+            lastActivity: new Date(Date.now() - 900000).toISOString(),
+          },
+          {
+            categoryId: '5',
+            name: 'Game Reviews',
+            description: 'Share your thoughts and reviews on the latest games.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 23,
+            lastActivity: new Date(Date.now() - 10800000).toISOString(),
+          },
+          {
+            categoryId: '6',
+            name: 'Tech Support',
+            description: 'Get help with gaming hardware, software issues, and troubleshooting.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 15,
+            lastActivity: new Date(Date.now() - 5400000).toISOString(),
+          },
+          {
+            categoryId: '7',
+            name: 'Esports',
+            description: 'Professional gaming, tournaments, and competitive play discussions.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 38,
+            lastActivity: new Date(Date.now() - 2700000).toISOString(),
+          },
+          {
+            categoryId: '8',
+            name: 'Mobile Gaming',
+            description: 'iOS and Android games, mobile gaming news, and recommendations.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 19,
+            lastActivity: new Date(Date.now() - 4500000).toISOString(),
+          },
+          {
+            categoryId: '9',
+            name: 'Game Development',
+            description: 'For aspiring and professional game developers to share and collaborate.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 12,
+            lastActivity: new Date(Date.now() - 6300000).toISOString(),
+          },
+        ];
+
+        // Simulate API delay
+        await new Promise(resolve => setTimeout(resolve, 500));
+        
+        setCategories(mockCategories);
+      } catch (error) {
+        console.error('Error loading mock categories:', error);
+      } finally {
+        setLoading(false);
+      }
+    };
+
+    fetchCategories();
+  }, []);
+
+  const filteredCategories = categories.filter(category =>
+    category.name.toLowerCase().includes(searchTerm.toLowerCase()) ||
+    category.description.toLowerCase().includes(searchTerm.toLowerCase())
+  );
+
+  if (loading) {
+    return (
+      <div className="min-h-screen bg-lfg-rich-black">
+        <div className="container py-12">
+          <div className="animate-pulse">
+            <div className="h-8 bg-lfg-oxford rounded mb-8 w-64"></div>
+            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+              {[...Array(6)].map((_, i) => (
+                <div key={i} className="h-48 bg-lfg-oxford rounded-lg"></div>
+              ))}
+            </div>
+          </div>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="min-h-screen bg-lfg-rich-black">
+      <div className="container py-12">
+        <div className="flex items-center justify-between mb-8">
+          <h1 className="text-3xl font-bold text-lfg-lavender">Forum Categories</h1>
+          {user?.isAdmin && (
+            <Link
+              to="/admin/categories/new"
+              className="flex items-center space-x-2 px-4 py-2 bg-lfg-lavender text-lfg-black rounded-lg hover:bg-white transition-colors font-medium"
+            >
+              <Plus size={16} />
+              <span>New Category</span>
+            </Link>
+          )}
+        </div>
+
+        <div className="mb-8">
+          <div className="relative max-w-md">
+            <input
+              type="text"
+              placeholder="Search categories..."
+              value={searchTerm}
+              onChange={(e) => setSearchTerm(e.target.value)}
+              className="
+                w-full px-4 py-2 pl-10 pr-4 
+                bg-lfg-oxford border border-lfg-charcoal rounded-lg
+                text-lfg-lavender placeholder-lfg-charcoal
+                focus:outline-none focus:ring-2 focus:ring-lfg-lavender focus:ring-opacity-50
+                transition-all duration-200
+              "
+            />
+            <Search 
+              size={20} 
+              className="absolute left-3 top-1/2 transform -translate-y-1/2 text-lfg-charcoal" 
+            />
+          </div>
+        </div>
+
+        {filteredCategories.length === 0 ? (
+          <div className="text-center py-12">
+            <div className="bg-lfg-oxford rounded-lg p-8 border border-lfg-charcoal">
+              <h2 className="text-xl font-semibold text-lfg-lavender mb-2">No Categories Found</h2>
+              <p className="text-lfg-charcoal mb-4">
+                {searchTerm ? 'No categories match your search.' : 'No categories have been created yet.'}
+              </p>
+              {user?.isAdmin && !searchTerm && (
+                <Link
+                  to="/admin/categories/new"
+                  className="inline-flex items-center space-x-2 px-4 py-2 bg-lfg-lavender text-lfg-black rounded-lg hover:bg-white transition-colors font-medium"
+                >
+                  <Plus size={16} />
+                  <span>Create First Category</span>
+                </Link>
+              )}
+            </div>
+          </div>
+        ) : (
+          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+            {filteredCategories.map((category) => (
+              <CategoryCard key={category.categoryId} category={category} />
+            ))}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+};
+
+export default Categories;

frontend/src/pages/CategoryDetail.tsx

@@ -0,0 +1,16 @@
+import React from 'react';
+
+const CategoryDetail: React.FC = () => {
+  return (
+    <div className="min-h-screen bg-lfg-rich-black">
+      <div className="max-w-7xl mx-auto px-4 py-8">
+        <h1 className="text-3xl font-bold text-lfg-lavender mb-8">Category Detail</h1>
+        <div className="bg-lfg-oxford rounded-lg p-8 border border-lfg-charcoal text-center">
+          <p className="text-lfg-charcoal">Category detail page coming soon...</p>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default CategoryDetail;

frontend/src/pages/CreateThread.tsx

@@ -0,0 +1,16 @@
+import React from 'react';
+
+const CreateThread: React.FC = () => {
+  return (
+    <div className="min-h-screen bg-lfg-rich-black">
+      <div className="max-w-7xl mx-auto px-4 py-8">
+        <h1 className="text-3xl font-bold text-lfg-lavender mb-8">Create New Thread</h1>
+        <div className="bg-lfg-oxford rounded-lg p-8 border border-lfg-charcoal text-center">
+          <p className="text-lfg-charcoal">Create thread page coming soon...</p>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default CreateThread;

frontend/src/pages/Home.tsx

@@ -0,0 +1,312 @@
+import React, { useEffect, useState } from 'react';
+import { Link } from 'react-router-dom';
+import { Plus, TrendingUp, MessageCircle, Users } from 'lucide-react';
+import CategoryCard from '../components/CategoryCard';
+import ThreadCard from '../components/ThreadCard';
+import { type Category, type Thread, type ApiResponse } from '../types/index';
+import { useAuth } from '../contexts/MockAuthContext';
+
+const Home: React.FC = () => {
+  const { user } = useAuth();
+  const [categories, setCategories] = useState<Category[]>([]);
+  const [recentThreads, setRecentThreads] = useState<Thread[]>([]);
+  const [stats, setStats] = useState({
+    totalThreads: 0,
+    totalPosts: 0,
+    totalUsers: 0,
+  });
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    const fetchData = async () => {
+      try {
+        // Mock data for demonstration
+        const mockCategories: Category[] = [
+          {
+            categoryId: '1',
+            name: 'General Gaming',
+            description: 'Discuss all things gaming - from the latest releases to classic favorites.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 45,
+            lastActivity: new Date(Date.now() - 3600000).toISOString(),
+          },
+          {
+            categoryId: '2',
+            name: 'PC Gaming',
+            description: 'Everything related to PC gaming, hardware, and performance optimization.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 32,
+            lastActivity: new Date(Date.now() - 7200000).toISOString(),
+          },
+          {
+            categoryId: '3',
+            name: 'Console Gaming',
+            description: 'PlayStation, Xbox, Nintendo Switch - all console gaming discussions.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 28,
+            lastActivity: new Date(Date.now() - 1800000).toISOString(),
+          },
+          {
+            categoryId: '4',
+            name: 'LFG (Looking for Group)',
+            description: 'Find teammates and gaming partners for multiplayer games.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 67,
+            lastActivity: new Date(Date.now() - 900000).toISOString(),
+          },
+          {
+            categoryId: '5',
+            name: 'Game Reviews',
+            description: 'Share your thoughts and reviews on the latest games.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 23,
+            lastActivity: new Date(Date.now() - 10800000).toISOString(),
+          },
+          {
+            categoryId: '6',
+            name: 'Tech Support',
+            description: 'Get help with gaming hardware, software issues, and troubleshooting.',
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            threadCount: 15,
+            lastActivity: new Date(Date.now() - 5400000).toISOString(),
+          },
+        ];
+
+        const mockThreads: Thread[] = [
+          {
+            threadId: '1',
+            categoryId: '1',
+            title: 'What are you playing this weekend?',
+            richContent: {
+              type: 'doc',
+              content: [
+                {
+                  type: 'paragraph',
+                  content: [
+                    {
+                      type: 'text',
+                      text: 'Drop your current gaming plans below! Looking for some new game recommendations.',
+                    },
+                  ],
+                },
+              ],
+            },
+            authorId: 'user1',
+            authorUsername: 'GamerMike',
+            createdAt: new Date(Date.now() - 1800000).toISOString(),
+            updatedAt: new Date(Date.now() - 1800000).toISOString(),
+            postCount: 12,
+            lastPostAt: new Date(Date.now() - 300000).toISOString(),
+          },
+          {
+            threadId: '2',
+            categoryId: '4',
+            title: 'LFG: Apex Legends Ranked',
+            richContent: {
+              type: 'doc',
+              content: [
+                {
+                  type: 'paragraph',
+                  content: [
+                    {
+                      type: 'text',
+                      text: 'Looking for 2 teammates for ranked Apex. Currently Platinum 2, aiming for Diamond.',
+                    },
+                  ],
+                },
+              ],
+            },
+            authorId: 'user2',
+            authorUsername: 'ApexHunter',
+            createdAt: new Date(Date.now() - 3600000).toISOString(),
+            updatedAt: new Date(Date.now() - 3600000).toISOString(),
+            postCount: 5,
+            lastPostAt: new Date(Date.now() - 600000).toISOString(),
+            isPinned: false,
+          },
+        ];
+
+        setCategories(mockCategories);
+        setRecentThreads(mockThreads);
+
+        setStats({
+          totalThreads: 142,
+          totalPosts: 1847,
+          totalUsers: 324,
+        });
+      } catch (error) {
+        console.error('Error loading mock data:', error);
+      } finally {
+        setLoading(false);
+      }
+    };
+
+    fetchData();
+  }, []);
+
+  if (loading) {
+    return (
+      <div className="min-h-screen bg-lfg-rich-black">
+        <div className="container py-12">
+          <div className="animate-pulse">
+            <div className="h-32 bg-lfg-oxford rounded-lg mb-8"></div>
+            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8">
+              {[...Array(6)].map((_, i) => (
+                <div key={i} className="h-48 bg-lfg-oxford rounded-lg"></div>
+              ))}
+            </div>
+          </div>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="min-h-screen bg-lfg-rich-black">
+      <div className="container py-12">
+        <div className="bg-gradient-to-r from-lfg-oxford to-lfg-charcoal rounded-2xl p-8 mb-8 border border-lfg-lavender/20">
+          <div className="text-center">
+            <h1 className="text-4xl font-bold text-lfg-lavender mb-4">
+              Welcome to LFG9 Forums
+            </h1>
+            <p className="text-lg text-lfg-charcoal mb-6 max-w-2xl mx-auto">
+              Connect with fellow gamers, share strategies, and find your next gaming adventure. 
+              Join discussions across multiple game categories and build lasting friendships.
+            </p>
+            {!user && (
+              <div className="flex justify-center space-x-4">
+                <Link
+                  to="/register"
+                  className="px-6 py-3 bg-lfg-lavender text-lfg-black rounded-lg hover:bg-white transition-colors font-semibold"
+                >
+                  Join the Community
+                </Link>
+                <Link
+                  to="/login"
+                  className="px-6 py-3 border border-lfg-lavender text-lfg-lavender rounded-lg hover:bg-lfg-lavender hover:text-lfg-black transition-colors font-semibold"
+                >
+                  Sign In
+                </Link>
+              </div>
+            )}
+          </div>
+        </div>
+
+        <div className="grid grid-cols-1 md:grid-cols-3 gap-8 mb-8">
+          <div className="bg-lfg-oxford rounded-lg p-6 border border-lfg-charcoal">
+            <div className="flex items-center space-x-3">
+              <div className="p-3 bg-lfg-lavender rounded-lg">
+                <MessageCircle className="text-lfg-black" size={24} />
+              </div>
+              <div>
+                <p className="text-2xl font-bold text-lfg-lavender">{stats.totalThreads}</p>
+                <p className="text-lfg-charcoal">Total Threads</p>
+              </div>
+            </div>
+          </div>
+
+          <div className="bg-lfg-oxford rounded-lg p-6 border border-lfg-charcoal">
+            <div className="flex items-center space-x-3">
+              <div className="p-3 bg-lfg-lavender rounded-lg">
+                <TrendingUp className="text-lfg-black" size={24} />
+              </div>
+              <div>
+                <p className="text-2xl font-bold text-lfg-lavender">{stats.totalPosts}</p>
+                <p className="text-lfg-charcoal">Total Posts</p>
+              </div>
+            </div>
+          </div>
+
+          <div className="bg-lfg-oxford rounded-lg p-6 border border-lfg-charcoal">
+            <div className="flex items-center space-x-3">
+              <div className="p-3 bg-lfg-lavender rounded-lg">
+                <Users className="text-lfg-black" size={24} />
+              </div>
+              <div>
+                <p className="text-2xl font-bold text-lfg-lavender">{stats.totalUsers}</p>
+                <p className="text-lfg-charcoal">Community Members</p>
+              </div>
+            </div>
+          </div>
+        </div>
+
+        <div className="grid grid-cols-1 xl:grid-cols-3 gap-8">
+          <div className="lg:col-span-2">
+            <div className="flex items-center justify-between mb-8">
+              <h2 className="text-2xl font-bold text-lfg-lavender">Categories</h2>
+              <Link
+                to="/categories"
+                className="text-lfg-lavender hover:text-white transition-colors"
+              >
+                View All →
+              </Link>
+            </div>
+
+            <div className="grid grid-cols-1 lg:grid-cols-2 gap-8 mb-8">
+              {categories.map((category) => (
+                <CategoryCard key={category.categoryId} category={category} />
+              ))}
+            </div>
+
+            {user && (
+              <div className="bg-lfg-oxford rounded-lg p-6 border border-lfg-charcoal">
+                <h3 className="text-lg font-semibold text-lfg-lavender mb-4">Quick Actions</h3>
+                <div className="flex flex-wrap gap-3">
+                  <Link
+                    to="/threads/new"
+                    className="flex items-center space-x-2 px-4 py-2 bg-lfg-lavender text-lfg-black rounded-lg hover:bg-white transition-colors font-medium"
+                  >
+                    <Plus size={16} />
+                    <span>New Thread</span>
+                  </Link>
+                  <Link
+                    to="/categories"
+                    className="px-4 py-2 border border-lfg-lavender text-lfg-lavender rounded-lg hover:bg-lfg-lavender hover:text-lfg-black transition-colors"
+                  >
+                    Browse Categories
+                  </Link>
+                </div>
+              </div>
+            )}
+          </div>
+
+          <div>
+            <div className="flex items-center justify-between mb-8">
+              <h2 className="text-xl font-bold text-lfg-lavender">Recent Activity</h2>
+              <Link
+                to="/recent"
+                className="text-lfg-lavender hover:text-white transition-colors text-sm"
+              >
+                View All →
+              </Link>
+            </div>
+
+            <div className="space-y-6">
+              {recentThreads.map((thread) => (
+                <ThreadCard key={thread.threadId} thread={thread} />
+              ))}
+            </div>
+
+            {recentThreads.length === 0 && (
+              <div className="bg-lfg-oxford rounded-lg p-8 border border-lfg-charcoal text-center">
+                <MessageCircle size={48} className="mx-auto text-lfg-charcoal mb-4" />
+                <p className="text-lfg-charcoal">No recent threads yet.</p>
+                {user && (
+                  <p className="text-lfg-charcoal mt-2">Be the first to start a discussion!</p>
+                )}
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default Home;

frontend/src/pages/Login.tsx

@@ -0,0 +1,166 @@
+import React, { useState } from 'react';
+import { Link, useNavigate, useLocation } from 'react-router-dom';
+import { Eye, EyeOff, LogIn } from 'lucide-react';
+import { useAuth } from '../contexts/MockAuthContext';
+
+const Login: React.FC = () => {
+  const [email, setEmail] = useState('');
+  const [password, setPassword] = useState('');
+  const [showPassword, setShowPassword] = useState(false);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState('');
+
+  const { login } = useAuth();
+  const navigate = useNavigate();
+  const location = useLocation();
+
+  const from = (location.state as any)?.from?.pathname || '/';
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+    setLoading(true);
+    setError('');
+
+    try {
+      await login(email, password);
+      navigate(from, { replace: true });
+    } catch (error: any) {
+      setError(error.message || 'Login failed. Please try again.');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return (
+    <div className="min-h-screen bg-lfg-rich-black flex items-center justify-center py-12 px-4 sm:px-6 lg:px-8">
+      <div className="max-w-md w-full space-y-8">
+        <div className="text-center">
+          <div className="mx-auto h-12 w-12 bg-lfg-lavender rounded-full flex items-center justify-center mb-4">
+            <LogIn className="h-6 w-6 text-lfg-black" />
+          </div>
+          <h2 className="text-3xl font-bold text-lfg-lavender">Sign in to your account</h2>
+          <p className="mt-2 text-sm text-lfg-charcoal">
+            Or{' '}
+            <Link to="/register" className="font-medium text-lfg-lavender hover:text-white">
+              create a new account
+            </Link>
+          </p>
+        </div>
+
+        <form className="mt-8 space-y-6" onSubmit={handleSubmit}>
+          {error && (
+            <div className="bg-red-900/20 border border-red-500/50 text-red-400 px-4 py-3 rounded-lg">
+              {error}
+            </div>
+          )}
+
+          <div className="space-y-4">
+            <div>
+              <label htmlFor="email" className="block text-sm font-medium text-lfg-lavender mb-2">
+                Email address
+              </label>
+              <input
+                id="email"
+                name="email"
+                type="email"
+                autoComplete="email"
+                required
+                value={email}
+                onChange={(e) => setEmail(e.target.value)}
+                className="
+                  w-full px-3 py-2 border border-lfg-charcoal rounded-lg
+                  bg-lfg-oxford text-lfg-lavender placeholder-lfg-charcoal
+                  focus:outline-none focus:ring-2 focus:ring-lfg-lavender focus:ring-opacity-50
+                  transition-all duration-200
+                "
+                placeholder="Enter your email"
+              />
+            </div>
+
+            <div>
+              <label htmlFor="password" className="block text-sm font-medium text-lfg-lavender mb-2">
+                Password
+              </label>
+              <div className="relative">
+                <input
+                  id="password"
+                  name="password"
+                  type={showPassword ? 'text' : 'password'}
+                  autoComplete="current-password"
+                  required
+                  value={password}
+                  onChange={(e) => setPassword(e.target.value)}
+                  className="
+                    w-full px-3 py-2 pr-10 border border-lfg-charcoal rounded-lg
+                    bg-lfg-oxford text-lfg-lavender placeholder-lfg-charcoal
+                    focus:outline-none focus:ring-2 focus:ring-lfg-lavender focus:ring-opacity-50
+                    transition-all duration-200
+                  "
+                  placeholder="Enter your password"
+                />
+                <button
+                  type="button"
+                  onClick={() => setShowPassword(!showPassword)}
+                  className="absolute inset-y-0 right-0 pr-3 flex items-center text-lfg-charcoal hover:text-lfg-lavender"
+                >
+                  {showPassword ? <EyeOff size={20} /> : <Eye size={20} />}
+                </button>
+              </div>
+            </div>
+          </div>
+
+          <div className="flex items-center justify-between">
+            <div className="flex items-center">
+              <input
+                id="remember-me"
+                name="remember-me"
+                type="checkbox"
+                className="h-4 w-4 text-lfg-lavender focus:ring-lfg-lavender border-lfg-charcoal rounded bg-lfg-oxford"
+              />
+              <label htmlFor="remember-me" className="ml-2 block text-sm text-lfg-charcoal">
+                Remember me
+              </label>
+            </div>
+
+            <div className="text-sm">
+              <Link to="/forgot-password" className="font-medium text-lfg-lavender hover:text-white">
+                Forgot your password?
+              </Link>
+            </div>
+          </div>
+
+          <div>
+            <button
+              type="submit"
+              disabled={loading}
+              className="
+                group relative w-full flex justify-center py-2 px-4 border border-transparent
+                text-sm font-medium rounded-lg text-lfg-black bg-lfg-lavender
+                hover:bg-white focus:outline-none focus:ring-2 focus:ring-offset-2
+                focus:ring-lfg-lavender disabled:opacity-50 disabled:cursor-not-allowed
+                transition-all duration-200
+              "
+            >
+              {loading ? (
+                <div className="loading-spinner w-5 h-5"></div>
+              ) : (
+                'Sign in'
+              )}
+            </button>
+          </div>
+
+          <div className="text-center">
+            <span className="text-lfg-charcoal text-sm">
+              Don't have an account?{' '}
+              <Link to="/register" className="font-medium text-lfg-lavender hover:text-white">
+                Sign up here
+              </Link>
+            </span>
+          </div>
+        </form>
+      </div>
+    </div>
+  );
+};
+
+export default Login;

frontend/src/pages/Profile.tsx

@@ -0,0 +1,16 @@
+import React from 'react';
+
+const Profile: React.FC = () => {
+  return (
+    <div className="min-h-screen bg-lfg-rich-black">
+      <div className="max-w-7xl mx-auto px-4 py-8">
+        <h1 className="text-3xl font-bold text-lfg-lavender mb-8">User Profile</h1>
+        <div className="bg-lfg-oxford rounded-lg p-8 border border-lfg-charcoal text-center">
+          <p className="text-lfg-charcoal">Profile page coming soon...</p>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default Profile;

frontend/src/pages/Register.tsx

@@ -0,0 +1,271 @@
+import React, { useState } from 'react';
+import { Link, useNavigate } from 'react-router-dom';
+import { Eye, EyeOff, UserPlus } from 'lucide-react';
+import { useAuth } from '../contexts/MockAuthContext';
+
+const Register: React.FC = () => {
+  const [formData, setFormData] = useState({
+    username: '',
+    email: '',
+    password: '',
+    confirmPassword: '',
+  });
+  const [showPassword, setShowPassword] = useState(false);
+  const [showConfirmPassword, setShowConfirmPassword] = useState(false);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState('');
+  const [passwordStrength, setPasswordStrength] = useState({
+    length: false,
+    uppercase: false,
+    lowercase: false,
+    number: false,
+    special: false,
+  });
+
+  const { register } = useAuth();
+  const navigate = useNavigate();
+
+  const checkPasswordStrength = (password: string) => {
+    setPasswordStrength({
+      length: password.length >= 8,
+      uppercase: /[A-Z]/.test(password),
+      lowercase: /[a-z]/.test(password),
+      number: /\d/.test(password),
+      special: /[@$!%*?&]/.test(password),
+    });
+  };
+
+  const handleChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const { name, value } = e.target;
+    setFormData(prev => ({ ...prev, [name]: value }));
+
+    if (name === 'password') {
+      checkPasswordStrength(value);
+    }
+  };
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+    setLoading(true);
+    setError('');
+
+    if (formData.password !== formData.confirmPassword) {
+      setError('Passwords do not match');
+      setLoading(false);
+      return;
+    }
+
+    const allStrengthPassed = Object.values(passwordStrength).every(Boolean);
+    if (!allStrengthPassed) {
+      setError('Password does not meet all requirements');
+      setLoading(false);
+      return;
+    }
+
+    try {
+      await register(formData.username, formData.email, formData.password);
+      navigate('/');
+    } catch (error: any) {
+      setError(error.message || 'Registration failed. Please try again.');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return (
+    <div className="min-h-screen bg-lfg-rich-black flex items-center justify-center py-12 px-4 sm:px-6 lg:px-8">
+      <div className="max-w-md w-full space-y-8">
+        <div className="text-center">
+          <div className="mx-auto h-12 w-12 bg-lfg-lavender rounded-full flex items-center justify-center mb-4">
+            <UserPlus className="h-6 w-6 text-lfg-black" />
+          </div>
+          <h2 className="text-3xl font-bold text-lfg-lavender">Create your account</h2>
+          <p className="mt-2 text-sm text-lfg-charcoal">
+            Or{' '}
+            <Link to="/login" className="font-medium text-lfg-lavender hover:text-white">
+              sign in to your existing account
+            </Link>
+          </p>
+        </div>
+
+        <form className="mt-8 space-y-6" onSubmit={handleSubmit}>
+          {error && (
+            <div className="bg-red-900/20 border border-red-500/50 text-red-400 px-4 py-3 rounded-lg">
+              {error}
+            </div>
+          )}
+
+          <div className="space-y-4">
+            <div>
+              <label htmlFor="username" className="block text-sm font-medium text-lfg-lavender mb-2">
+                Username
+              </label>
+              <input
+                id="username"
+                name="username"
+                type="text"
+                required
+                value={formData.username}
+                onChange={handleChange}
+                className="
+                  w-full px-3 py-2 border border-lfg-charcoal rounded-lg
+                  bg-lfg-oxford text-lfg-lavender placeholder-lfg-charcoal
+                  focus:outline-none focus:ring-2 focus:ring-lfg-lavender focus:ring-opacity-50
+                  transition-all duration-200
+                "
+                placeholder="Choose a username"
+              />
+              <p className="mt-1 text-xs text-lfg-charcoal">
+                3-30 characters, alphanumeric only
+              </p>
+            </div>
+
+            <div>
+              <label htmlFor="email" className="block text-sm font-medium text-lfg-lavender mb-2">
+                Email address
+              </label>
+              <input
+                id="email"
+                name="email"
+                type="email"
+                autoComplete="email"
+                required
+                value={formData.email}
+                onChange={handleChange}
+                className="
+                  w-full px-3 py-2 border border-lfg-charcoal rounded-lg
+                  bg-lfg-oxford text-lfg-lavender placeholder-lfg-charcoal
+                  focus:outline-none focus:ring-2 focus:ring-lfg-lavender focus:ring-opacity-50
+                  transition-all duration-200
+                "
+                placeholder="Enter your email"
+              />
+            </div>
+
+            <div>
+              <label htmlFor="password" className="block text-sm font-medium text-lfg-lavender mb-2">
+                Password
+              </label>
+              <div className="relative">
+                <input
+                  id="password"
+                  name="password"
+                  type={showPassword ? 'text' : 'password'}
+                  required
+                  value={formData.password}
+                  onChange={handleChange}
+                  className="
+                    w-full px-3 py-2 pr-10 border border-lfg-charcoal rounded-lg
+                    bg-lfg-oxford text-lfg-lavender placeholder-lfg-charcoal
+                    focus:outline-none focus:ring-2 focus:ring-lfg-lavender focus:ring-opacity-50
+                    transition-all duration-200
+                  "
+                  placeholder="Create a password"
+                />
+                <button
+                  type="button"
+                  onClick={() => setShowPassword(!showPassword)}
+                  className="absolute inset-y-0 right-0 pr-3 flex items-center text-lfg-charcoal hover:text-lfg-lavender"
+                >
+                  {showPassword ? <EyeOff size={20} /> : <Eye size={20} />}
+                </button>
+              </div>
+
+              {formData.password && (
+                <div className="mt-2 space-y-1">
+                  <div className="text-xs text-lfg-charcoal">Password requirements:</div>
+                  <div className="grid grid-cols-2 gap-1 text-xs">
+                    <div className={`flex items-center ${passwordStrength.length ? 'text-green-400' : 'text-lfg-charcoal'}`}>
+                      <span className="mr-1">{passwordStrength.length ? '✓' : '○'}</span>
+                      8+ characters
+                    </div>
+                    <div className={`flex items-center ${passwordStrength.uppercase ? 'text-green-400' : 'text-lfg-charcoal'}`}>
+                      <span className="mr-1">{passwordStrength.uppercase ? '✓' : '○'}</span>
+                      Uppercase
+                    </div>
+                    <div className={`flex items-center ${passwordStrength.lowercase ? 'text-green-400' : 'text-lfg-charcoal'}`}>
+                      <span className="mr-1">{passwordStrength.lowercase ? '✓' : '○'}</span>
+                      Lowercase
+                    </div>
+                    <div className={`flex items-center ${passwordStrength.number ? 'text-green-400' : 'text-lfg-charcoal'}`}>
+                      <span className="mr-1">{passwordStrength.number ? '✓' : '○'}</span>
+                      Number
+                    </div>
+                    <div className={`flex items-center ${passwordStrength.special ? 'text-green-400' : 'text-lfg-charcoal'} col-span-2`}>
+                      <span className="mr-1">{passwordStrength.special ? '✓' : '○'}</span>
+                      Special character (@$!%*?&)
+                    </div>
+                  </div>
+                </div>
+              )}
+            </div>
+
+            <div>
+              <label htmlFor="confirmPassword" className="block text-sm font-medium text-lfg-lavender mb-2">
+                Confirm Password
+              </label>
+              <div className="relative">
+                <input
+                  id="confirmPassword"
+                  name="confirmPassword"
+                  type={showConfirmPassword ? 'text' : 'password'}
+                  required
+                  value={formData.confirmPassword}
+                  onChange={handleChange}
+                  className="
+                    w-full px-3 py-2 pr-10 border border-lfg-charcoal rounded-lg
+                    bg-lfg-oxford text-lfg-lavender placeholder-lfg-charcoal
+                    focus:outline-none focus:ring-2 focus:ring-lfg-lavender focus:ring-opacity-50
+                    transition-all duration-200
+                  "
+                  placeholder="Confirm your password"
+                />
+                <button
+                  type="button"
+                  onClick={() => setShowConfirmPassword(!showConfirmPassword)}
+                  className="absolute inset-y-0 right-0 pr-3 flex items-center text-lfg-charcoal hover:text-lfg-lavender"
+                >
+                  {showConfirmPassword ? <EyeOff size={20} /> : <Eye size={20} />}
+                </button>
+              </div>
+              {formData.confirmPassword && formData.password !== formData.confirmPassword && (
+                <p className="mt-1 text-xs text-red-400">Passwords do not match</p>
+              )}
+            </div>
+          </div>
+
+          <div>
+            <button
+              type="submit"
+              disabled={loading}
+              className="
+                group relative w-full flex justify-center py-2 px-4 border border-transparent
+                text-sm font-medium rounded-lg text-lfg-black bg-lfg-lavender
+                hover:bg-white focus:outline-none focus:ring-2 focus:ring-offset-2
+                focus:ring-lfg-lavender disabled:opacity-50 disabled:cursor-not-allowed
+                transition-all duration-200
+              "
+            >
+              {loading ? (
+                <div className="loading-spinner w-5 h-5"></div>
+              ) : (
+                'Create Account'
+              )}
+            </button>
+          </div>
+
+          <div className="text-center">
+            <span className="text-lfg-charcoal text-sm">
+              Already have an account?{' '}
+              <Link to="/login" className="font-medium text-lfg-lavender hover:text-white">
+                Sign in here
+              </Link>
+            </span>
+          </div>
+        </form>
+      </div>
+    </div>
+  );
+};
+
+export default Register;

frontend/src/pages/Settings.tsx

@@ -0,0 +1,16 @@
+import React from 'react';
+
+const Settings: React.FC = () => {
+  return (
+    <div className="min-h-screen bg-lfg-rich-black">
+      <div className="max-w-7xl mx-auto px-4 py-8">
+        <h1 className="text-3xl font-bold text-lfg-lavender mb-8">Settings</h1>
+        <div className="bg-lfg-oxford rounded-lg p-8 border border-lfg-charcoal text-center">
+          <p className="text-lfg-charcoal">Settings page coming soon...</p>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default Settings;

frontend/src/pages/ThreadDetail.tsx

@@ -0,0 +1,16 @@
+import React from 'react';
+
+const ThreadDetail: React.FC = () => {
+  return (
+    <div className="min-h-screen bg-lfg-rich-black">
+      <div className="max-w-7xl mx-auto px-4 py-8">
+        <h1 className="text-3xl font-bold text-lfg-lavender mb-8">Thread Detail</h1>
+        <div className="bg-lfg-oxford rounded-lg p-8 border border-lfg-charcoal text-center">
+          <p className="text-lfg-charcoal">Thread detail page coming soon...</p>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default ThreadDetail;

frontend/src/types/index.ts

@@ -0,0 +1,104 @@
+// TipTap types
+
+export interface User {
+  userId: string;
+  username: string;
+  email: string;
+  createdAt: string;
+  updatedAt: string;
+  profileInfo?: {
+    bio?: string;
+    avatar?: string;
+    location?: string;
+  };
+  storageQuotaUsed: number;
+  isAdmin?: boolean;
+}
+
+export interface Category {
+  categoryId: string;
+  name: string;
+  description: string;
+  createdAt: string;
+  updatedAt: string;
+  threadCount?: number;
+  lastActivity?: string;
+}
+
+export interface RichContent {
+  type: 'doc';
+  content: any[];
+}
+
+export interface Thread {
+  threadId: string;
+  categoryId: string;
+  title: string;
+  richContent: RichContent;
+  authorId: string;
+  authorUsername?: string;
+  createdAt: string;
+  updatedAt: string;
+  attachedFiles?: FileMetadata[];
+  postCount?: number;
+  lastPostAt?: string;
+  isLocked?: boolean;
+  isPinned?: boolean;
+}
+
+export interface Post {
+  postId: string;
+  threadId: string;
+  richContent: RichContent;
+  authorId: string;
+  authorUsername?: string;
+  createdAt: string;
+  updatedAt: string;
+  parentPostId?: string;
+  attachedFiles?: FileMetadata[];
+  isEdited?: boolean;
+  editedAt?: string;
+}
+
+export interface FileMetadata {
+  fileId: string;
+  userId: string;
+  fileName: string;
+  fileType: string;
+  fileSize: number;
+  s3Key: string;
+  threadId?: string;
+  postId?: string;
+  uploadDate: string;
+  thumbnailKey?: string;
+  mediumKey?: string;
+  altText?: string;
+}
+
+export interface ApiResponse<T = any> {
+  success: boolean;
+  data?: T;
+  error?: string;
+  message?: string;
+  pagination?: {
+    page: number;
+    limit: number;
+    total: number;
+    pages: number;
+  };
+}
+
+export interface PaginationParams {
+  page: number;
+  limit: number;
+  sortBy?: string;
+  sortOrder?: 'asc' | 'desc';
+}
+
+export interface SearchParams {
+  query: string;
+  categoryId?: string;
+  authorId?: string;
+  dateFrom?: string;
+  dateTo?: string;
+}

frontend/src/vite-env.d.ts

@@ -0,0 +1 @@
+/// <reference types="vite/client" />

frontend/tailwind.config.js

@@ -0,0 +1,49 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: [
+    "./index.html",
+    "./src/**/*.{js,ts,jsx,tsx}",
+  ],
+  darkMode: 'class',
+  theme: {
+    container: {
+      center: true,
+      padding: {
+        DEFAULT: '1rem',
+        sm: '1.5rem',
+        lg: '2rem',
+        xl: '3rem',
+        '2xl': '4rem',
+      },
+    },
+    extend: {
+      colors: {
+        'lfg': {
+          'black': '#000000',
+          'rich-black': '#0C1821',
+          'oxford': '#1B2A41',
+          'charcoal': '#324A5F',
+          'lavender': '#CCC9DC',
+        }
+      },
+      fontFamily: {
+        'sans': ['Inter', 'system-ui', 'sans-serif'],
+      },
+      animation: {
+        'fade-in': 'fadeIn 0.3s ease-in-out',
+        'slide-up': 'slideUp 0.3s ease-out',
+      },
+      keyframes: {
+        fadeIn: {
+          '0%': { opacity: '0' },
+          '100%': { opacity: '1' },
+        },
+        slideUp: {
+          '0%': { transform: 'translateY(10px)', opacity: '0' },
+          '100%': { transform: 'translateY(0)', opacity: '1' },
+        },
+      },
+    },
+  },
+  plugins: [],
+}

frontend/tsconfig.app.json

@@ -0,0 +1,27 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "target": "ES2022",
+    "useDefineForClassFields": true,
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["src"]
+}

frontend/tsconfig.json

@@ -0,0 +1,7 @@
+{
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.app.json" },
+    { "path": "./tsconfig.node.json" }
+  ]
+}

frontend/tsconfig.node.json

@@ -0,0 +1,25 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "ES2023",
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["vite.config.ts"]
+}

frontend/vite.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()],
+})

package.json

@@ -0,0 +1,21 @@
+{
+  "name": "lfg9-forums",
+  "version": "1.0.0",
+  "description": "A modern full-stack forum application",
+  "scripts": {
+    "setup": "npm install && cd frontend && npm install && cd ../backend && npm install",
+    "setup-db": "node setup-dev-tables.js",
+    "dev": "concurrently \"npm run dev:backend\" \"npm run dev:frontend\"",
+    "dev:backend": "cd backend && npm run dev",
+    "dev:frontend": "cd frontend && npm run dev",
+    "build": "cd frontend && npm run build && cd ../backend && npm run build",
+    "start": "cd backend && npm start"
+  },
+  "dependencies": {
+    "concurrently": "^8.2.2",
+    "@aws-sdk/client-dynamodb": "^3.400.0",
+    "dotenv": "^16.3.1"
+  },
+  "keywords": ["forum", "react", "node", "typescript", "aws"],
+  "license": "MIT"
+}

setup-dev-tables.js

@@ -0,0 +1,128 @@
+const { DynamoDBClient } = require('@aws-sdk/client-dynamodb');
+const { CreateTableCommand } = require('@aws-sdk/client-dynamodb');
+
+const client = new DynamoDBClient({
+  region: process.env.AWS_REGION || 'us-east-1',
+  credentials: {
+    accessKeyId: process.env.AWS_ACCESS_KEY_ID,
+    secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY,
+  },
+});
+
+const tablePrefix = 'lfg9_forums_dev_';
+
+const tables = [
+  {
+    name: `${tablePrefix}users`,
+    keySchema: [{ AttributeName: 'userId', KeyType: 'HASH' }],
+    attributeDefinitions: [{ AttributeName: 'userId', AttributeType: 'S' }],
+  },
+  {
+    name: `${tablePrefix}categories`,
+    keySchema: [{ AttributeName: 'categoryId', KeyType: 'HASH' }],
+    attributeDefinitions: [{ AttributeName: 'categoryId', AttributeType: 'S' }],
+  },
+  {
+    name: `${tablePrefix}threads`,
+    keySchema: [{ AttributeName: 'threadId', KeyType: 'HASH' }],
+    attributeDefinitions: [
+      { AttributeName: 'threadId', AttributeType: 'S' },
+      { AttributeName: 'categoryId', AttributeType: 'S' },
+      { AttributeName: 'authorId', AttributeType: 'S' },
+    ],
+    globalSecondaryIndexes: [
+      {
+        IndexName: 'CategoryIdIndex',
+        KeySchema: [{ AttributeName: 'categoryId', KeyType: 'HASH' }],
+        Projection: { ProjectionType: 'ALL' },
+      },
+      {
+        IndexName: 'AuthorIdIndex',
+        KeySchema: [{ AttributeName: 'authorId', KeyType: 'HASH' }],
+        Projection: { ProjectionType: 'ALL' },
+      },
+    ],
+  },
+  {
+    name: `${tablePrefix}posts`,
+    keySchema: [{ AttributeName: 'postId', KeyType: 'HASH' }],
+    attributeDefinitions: [
+      { AttributeName: 'postId', AttributeType: 'S' },
+      { AttributeName: 'threadId', AttributeType: 'S' },
+      { AttributeName: 'authorId', AttributeType: 'S' },
+    ],
+    globalSecondaryIndexes: [
+      {
+        IndexName: 'ThreadIdIndex',
+        KeySchema: [{ AttributeName: 'threadId', KeyType: 'HASH' }],
+        Projection: { ProjectionType: 'ALL' },
+      },
+      {
+        IndexName: 'AuthorIdIndex',
+        KeySchema: [{ AttributeName: 'authorId', KeyType: 'HASH' }],
+        Projection: { ProjectionType: 'ALL' },
+      },
+    ],
+  },
+  {
+    name: `${tablePrefix}files`,
+    keySchema: [{ AttributeName: 'fileId', KeyType: 'HASH' }],
+    attributeDefinitions: [
+      { AttributeName: 'fileId', AttributeType: 'S' },
+      { AttributeName: 'userId', AttributeType: 'S' },
+    ],
+    globalSecondaryIndexes: [
+      {
+        IndexName: 'UserIdIndex',
+        KeySchema: [{ AttributeName: 'userId', KeyType: 'HASH' }],
+        Projection: { ProjectionType: 'ALL' },
+      },
+    ],
+  },
+];
+
+async function createTable(tableConfig) {
+  const params = {
+    TableName: tableConfig.name,
+    KeySchema: tableConfig.keySchema,
+    AttributeDefinitions: tableConfig.attributeDefinitions,
+    BillingMode: 'PAY_PER_REQUEST',
+  };
+
+  if (tableConfig.globalSecondaryIndexes) {
+    params.GlobalSecondaryIndexes = tableConfig.globalSecondaryIndexes.map(gsi => ({
+      ...gsi,
+      BillingMode: 'PAY_PER_REQUEST',
+    }));
+  }
+
+  try {
+    const command = new CreateTableCommand(params);
+    const result = await client.send(command);
+    console.log(`✅ Created table: ${tableConfig.name}`);
+    return result;
+  } catch (error) {
+    if (error.name === 'ResourceInUseException') {
+      console.log(`⚠️  Table ${tableConfig.name} already exists`);
+    } else {
+      console.error(`❌ Error creating table ${tableConfig.name}:`, error.message);
+    }
+  }
+}
+
+async function setupTables() {
+  console.log('🚀 Setting up DynamoDB tables for development...\n');
+  
+  for (const table of tables) {
+    await createTable(table);
+  }
+  
+  console.log('\n✨ Database setup complete!');
+  console.log('🔗 You can view your tables in the AWS Console:');
+  console.log('https://console.aws.amazon.com/dynamodb/home?region=us-east-1#tables:');
+}
+
+// Load environment variables from .env file
+require('dotenv').config({ path: './backend/.env' });
+
+setupTables().catch(console.error);