Fix syntax error: remove orphan object definition after sendEmail function

chat/server.js

@@ -1662,48 +1662,6 @@ async function sendEmail({ to, subject, text, html }) {
     throw err;
   }
 }
-  },
-  // Enhanced Analytics Tracking
-  userAnalytics: {
-    userSessions: {}, // userId: { loginTime, lastActivity, sessionDuration, pageViews, featuresUsed, modelUsage }
-    dailyActiveUsers: {}, // date: Set of userIds
-    weeklyActiveUsers: {}, // weekKey: Set of userIds  
-    monthlyActiveUsers: {}, // monthKey: Set of userIds
-    sessionDurations: [], // Array of session durations in seconds
-    projectData: {}, // sessionId: { createdAt, completedAt, status, featuresUsed }
-    featureUsage: {}, // featureName: usage count
-    modelUsage: {}, // modelName: usage count
-    exportUsage: {}, // exportType: count
-    errorRates: {}, // errorType: count
-    retentionCohorts: {}, // cohortMonth: { cohortSize, retention: { 1week: %, 1month: %, 3month: % } }
-    conversionFunnels: {}, // funnelName: steps data
-    resourceUtilization: {}, // timestamp: { cpu, memory, queueTime }
-    queueMetrics: {}, // timestamp: { waitTime, processedCount }
-    planUpgradePatterns: {}, // fromPlan: toPlan: count
-  },
-  businessMetrics: {
-    mrr: 0, // Monthly Recurring Revenue
-    ltv: 0, // Lifetime Value
-    churnRate: 0, // Churn rate percentage
-    customerAcquisitionCost: 0,
-    averageRevenuePerUser: 0,
-    trialConversions: {}, // plan: conversion rate
-    upgradeDowngradePatterns: {}, // fromPlan: { toPlan: count }
-    featureAdoptionByPlan: {}, // feature: { plan: usage count }
-  },
-  technicalMetrics: {
-    aiResponseTimes: [], // Array of response times
-    aiErrorRates: {}, // provider: error rate
-    modelSelectionTrends: {}, // time period: model usage
-    queueWaitTimes: [], // Array of wait times
-    resourceUsage: [], // Array of resource usage snapshots
-    systemHealth: {
-      uptime: 0,
-      errors: 0,
-      lastRestart: null
-    }
-  }
-};
 let trackingPersistTimer = null;
 let featureRequestsDb = [];
 let contactMessagesDb = [];