feat: implement comprehensive process cleanup system

- Added aggressive cleanup system that runs every 5 minutes to kill orphaned processes
- Enhanced process cleanup with better signal handling and forced cleanup
- Added startup initialization system to ensure cleanup is properly loaded
- Integrated cleanup system into app layouts for automatic initialization
- Added zombie process cleanup and temp directory cleanup
- Improved Docker container restart behavior for proper process cleanup
- Resolves issue with zombie Chrome processes accumulating

lib/process-cleanup.ts

@@ -5,6 +5,7 @@ import { tradingViewAutomation } from './tradingview-automation'
 class ProcessCleanup {
   private static instance: ProcessCleanup
   private isShuttingDown = false
+  private aggressiveCleanup: any = null
 
   private constructor() {
     // Register cleanup handlers
@@ -13,6 +14,18 @@ class ProcessCleanup {
     process.on('SIGQUIT', this.handleShutdown.bind(this))
     process.on('uncaughtException', this.handleError.bind(this))
     process.on('unhandledRejection', this.handleError.bind(this))
+    
+    // Lazy load aggressive cleanup to avoid circular imports
+    this.loadAggressiveCleanup()
+  }
+
+  private async loadAggressiveCleanup() {
+    try {
+      const { default: aggressiveCleanup } = await import('./aggressive-cleanup')
+      this.aggressiveCleanup = aggressiveCleanup
+    } catch (error) {
+      console.error('Failed to load aggressive cleanup:', error)
+    }
   }
 
   static getInstance(): ProcessCleanup {
@@ -32,6 +45,12 @@ class ProcessCleanup {
     console.log(`\n🛑 Received ${signal}, initiating graceful shutdown...`)
 
     try {
+      // Use aggressive cleanup first
+      if (this.aggressiveCleanup) {
+        console.log('🧹 Running aggressive cleanup...')
+        await this.aggressiveCleanup.forceCleanup()
+      }
+
       // Clean up screenshot service
       console.log('🧹 Cleaning up screenshot service...')
       await enhancedScreenshotService.cleanup()
@@ -53,6 +72,9 @@ class ProcessCleanup {
     
     // Attempt cleanup
     try {
+      if (this.aggressiveCleanup) {
+        await this.aggressiveCleanup.forceCleanup()
+      }
       await enhancedScreenshotService.cleanup()
       await tradingViewAutomation.forceCleanup()
     } catch (cleanupError) {