🔐 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.

debug-ai-analysis.js

@@ -11,9 +11,9 @@ async function testAIAnalysis() {
   try {
     console.log('🔍 Testing AI analysis with a real screenshot...')
     
-    // Use one of the existing screenshots
+    // Use the specific screenshot you mentioned
     const screenshotsDir = path.join(process.cwd(), 'screenshots')
-    const testImage = 'SOLUSD_60_1752324455391_ai.png'
+    const testImage = 'debug_before_timeframe_change_1752324987294.png'
     const imagePath = path.join(screenshotsDir, testImage)
     
     console.log(`📸 Using screenshot: ${imagePath}`)