🔐 Implement robust session persistence to avoid 'are you human' captcha checks

- Add comprehensive session persistence with cookies, localStorage, and sessionStorage
- Implement stealth browser features to reduce bot detection
- Add smartLogin() method that prioritizes saved sessions over fresh logins
- Create session management utilities (refresh, clear, test validity)
- Update enhanced screenshot service to use session persistence
- Add comprehensive documentation and test script
- Support manual login fallback when captcha is encountered
- Sessions stored in .tradingview-session/ directory for Docker compatibility

This solves the captcha problem by avoiding repeated logins through persistent sessions.

test-session-persistence.js

@@ -0,0 +1,59 @@
+#!/usr/bin/env node
+
+// Test session persistence features
+const { TradingViewAutomation } = require('./lib/tradingview-automation')
+
+async function testSessionPersistence() {
+  console.log('🧪 Testing TradingView session persistence...')
+  
+  const automation = new TradingViewAutomation()
+  
+  try {
+    // Initialize automation
+    await automation.init()
+    
+    // Check session info before login
+    console.log('\n📊 Session info before login:')
+    const sessionBefore = await automation.getSessionInfo()
+    console.log(JSON.stringify(sessionBefore, null, 2))
+    
+    // Try to login (will skip if already logged in)
+    console.log('\n🔐 Testing login with session persistence...')
+    const loginResult = await automation.login()
+    
+    if (loginResult) {
+      console.log('✅ Login successful!')
+      
+      // Check session info after login
+      console.log('\n📊 Session info after login:')
+      const sessionAfter = await automation.getSessionInfo()
+      console.log(JSON.stringify(sessionAfter, null, 2))
+      
+      // Take a screenshot to verify we're logged in
+      await automation.navigateToChart({ symbol: 'BTCUSD', timeframe: '5' })
+      const screenshot = await automation.takeScreenshot('session_test.png')
+      console.log(`📸 Screenshot saved: ${screenshot}`)
+      
+    } else {
+      console.log('❌ Login failed')
+    }
+    
+  } catch (error) {
+    console.error('❌ Test failed:', error)
+  } finally {
+    // Close automation (this will save session)
+    await automation.close()
+    console.log('✅ Automation closed and session saved')
+  }
+}
+
+// Run the test
+testSessionPersistence()
+  .then(() => {
+    console.log('\n🎉 Session persistence test completed!')
+    process.exit(0)
+  })
+  .catch((error) => {
+    console.error('💥 Test failed:', error)
+    process.exit(1)
+  })