Modernize collaborative pixel art platform to production-ready architecture

Major refactor from simple HTML/JS app to modern full-stack TypeScript application:

## Architecture Changes
- Migrated to monorepo structure with workspaces (backend, frontend, shared)
- Backend: Node.js + Express + TypeScript + Socket.IO
- Frontend: Next.js 15.5 + React 19 + TypeScript + Tailwind CSS
- Shared: Common types and utilities across packages

## Key Features Implemented
- Real-time WebSocket collaboration via Socket.IO
- Virtual canvas with chunked loading for performance
- Modern UI with dark mode and responsive design
- Mock database system for easy development (Redis/PostgreSQL compatible)
- Comprehensive error handling and rate limiting
- User presence and cursor tracking
- Infinite canvas support with zoom/pan controls

## Performance Optimizations
- Canvas virtualization - only renders visible viewport
- Chunked pixel data loading (64x64 pixel chunks)
- Optimized WebSocket protocol
- Memory-efficient state management with Zustand

## Development Experience
- Full TypeScript support across all packages
- Hot reload for both frontend and backend
- Docker support for production deployment
- Comprehensive linting and formatting
- Automated development server startup

## Fixed Issues
- Corrected start script paths
- Updated environment configuration
- Fixed ESLint configuration issues
- Ensured all dependencies are properly installed
- Verified build process works correctly

scripts/setup.js

@@ -0,0 +1,75 @@
+#!/usr/bin/env node
+
+const { execSync } = require('child_process');
+const fs = require('fs');
+const path = require('path');
+
+console.log('🎨 Setting up GaPlace...\n');
+
+// Check if required files exist
+const requiredFiles = [
+  'backend/.env',
+  'frontend/.env.local'
+];
+
+console.log('📋 Checking environment files...');
+requiredFiles.forEach(file => {
+  if (!fs.existsSync(file)) {
+    console.log(`❌ Missing: ${file}`);
+    process.exit(1);
+  } else {
+    console.log(`✅ Found: ${file}`);
+  }
+});
+
+// Build shared package
+console.log('\n📦 Building shared package...');
+try {
+  execSync('npm run build', { cwd: 'shared', stdio: 'inherit' });
+  console.log('✅ Shared package built successfully');
+} catch (error) {
+  console.error('❌ Failed to build shared package');
+  process.exit(1);
+}
+
+// Install dependencies for all workspaces
+console.log('\n📦 Installing dependencies...');
+try {
+  execSync('npm install', { stdio: 'inherit' });
+  console.log('✅ Dependencies installed successfully');
+} catch (error) {
+  console.error('❌ Failed to install dependencies');
+  process.exit(1);
+}
+
+// Build backend
+console.log('\n🔧 Building backend...');
+try {
+  execSync('npm run build', { cwd: 'backend', stdio: 'inherit' });
+  console.log('✅ Backend built successfully');
+} catch (error) {
+  console.error('❌ Failed to build backend');
+  process.exit(1);
+}
+
+// Build frontend
+console.log('\n🎨 Building frontend...');
+try {
+  execSync('npm run build', { cwd: 'frontend', stdio: 'inherit' });
+  console.log('✅ Frontend built successfully');
+} catch (error) {
+  console.error('❌ Failed to build frontend');
+  process.exit(1);
+}
+
+console.log('\n🚀 Setup complete! To start development:');
+console.log('');
+console.log('1. Start databases:');
+console.log('   docker-compose up redis postgres -d');
+console.log('');
+console.log('2. Start development servers:');
+console.log('   npm run dev');
+console.log('');
+console.log('3. Open http://localhost:3000 in your browser');
+console.log('');
+console.log('🎨 Welcome to GaPlace! ✨');

scripts/start-dev.js

@@ -0,0 +1,128 @@
+#!/usr/bin/env node
+
+const { spawn, exec } = require('child_process');
+const path = require('path');
+const util = require('util');
+const execPromise = util.promisify(exec);
+
+console.log('🎨 Starting GaPlace Development Environment...\n');
+
+// Function to check if port is in use
+async function isPortInUse(port) {
+  try {
+    const { stdout } = await execPromise(`netstat -ano | findstr :${port}`);
+    return stdout.trim().length > 0;
+  } catch (error) {
+    return false;
+  }
+}
+
+// Function to kill process on port
+async function killPort(port) {
+  try {
+    await execPromise(`npx kill-port ${port}`);
+    console.log(`✅ Cleared port ${port}`);
+  } catch (error) {
+    console.log(`ℹ️  Port ${port} was already free`);
+  }
+}
+
+// Function to start a process and handle output
+function startProcess(name, command, args, cwd, color) {
+  console.log(`${color}[${name}]${'\x1b[0m'} Starting: ${command} ${args.join(' ')}`);
+  
+  const isWindows = process.platform === 'win32';
+  const proc = spawn(command, args, { 
+    cwd, 
+    stdio: 'pipe',
+    shell: true,
+    windowsHide: true
+  });
+
+  proc.stdout.on('data', (data) => {
+    const lines = data.toString().split('\n').filter(line => line.trim());
+    lines.forEach(line => {
+      console.log(`${color}[${name}]${'\x1b[0m'} ${line}`);
+    });
+  });
+
+  proc.stderr.on('data', (data) => {
+    const lines = data.toString().split('\n').filter(line => line.trim());
+    lines.forEach(line => {
+      console.log(`${color}[${name}]${'\x1b[0m'} ${line}`);
+    });
+  });
+
+  proc.on('close', (code) => {
+    if (code !== 0) {
+      console.log(`${color}[${name}]${'\x1b[0m'} ❌ Process exited with code ${code}`);
+    }
+  });
+
+  proc.on('error', (error) => {
+    console.log(`${color}[${name}]${'\x1b[0m'} ❌ Error: ${error.message}`);
+  });
+
+  return proc;
+}
+
+async function startDevelopment() {
+  try {
+    // Clear ports first
+    console.log('🧹 Clearing ports...');
+    await killPort(3001);
+    await killPort(3000);
+    
+    // Wait a moment for ports to be fully cleared
+    await new Promise(resolve => setTimeout(resolve, 1000));
+    
+    console.log('🔧 Starting backend server...');
+    const backend = startProcess(
+      'Backend', 
+      'npm', 
+      ['run', 'dev'], 
+      path.join(__dirname, '..', 'backend'),
+      '\x1b[34m' // Blue
+    );
+
+    // Wait for backend to start
+    await new Promise(resolve => setTimeout(resolve, 3000));
+    
+    console.log('🎨 Starting frontend server...');
+    const frontend = startProcess(
+      'Frontend', 
+      'npm', 
+      ['run', 'dev'], 
+      path.join(__dirname, '..', 'frontend'),
+      '\x1b[32m' // Green
+    );
+
+    console.log('\n📱 Frontend: http://localhost:3000');
+    console.log('🔌 Backend: http://localhost:3001');
+    console.log('🩺 Health Check: http://localhost:3001/health');
+    console.log('💡 Press Ctrl+C to stop all servers\n');
+
+    // Handle Ctrl+C
+    process.on('SIGINT', async () => {
+      console.log('\n🛑 Shutting down development servers...');
+      backend.kill('SIGTERM');
+      frontend.kill('SIGTERM');
+      
+      // Wait a moment then force kill if needed
+      setTimeout(() => {
+        backend.kill('SIGKILL');
+        frontend.kill('SIGKILL');
+        process.exit(0);
+      }, 2000);
+    });
+
+    // Keep the script running
+    setInterval(() => {}, 1000);
+
+  } catch (error) {
+    console.error('❌ Failed to start development environment:', error.message);
+    process.exit(1);
+  }
+}
+
+startDevelopment();