feat: add real-time log streaming with anomaly highlighting and smart…

[Saranyadharani]

Changes Made

Backend

• Added /stream-analyze SSE endpoint for real-time log streaming
• Integrated anomaly detection with color-coded types (critical, time voids, log shaving)
• Progress tracking with line-by-line processing

Frontend

• Created streaming.js - SSE client with pause/resume/stop/clear controls
• Created anomalyFilters.js - Dynamic filter chips for anomaly types
• Created streaming.css - Responsive compact design matching forensic theme
• Updated dashboard.html - Integrated streaming section with 6:6 grid layout

Features

• Real-time log streaming with progress updates
• Color-coded anomalies (🔴 Critical, 🟡 Time Voids, 🔶 Log Shaving)
• Smart filter chips to show/hide anomaly types
• Pause/Resume streaming for detailed inspection
• Stop/Clear controls
• Statistics cards with anomaly counts
• Export to PDF functionality
• Responsive design (mobile/tablet/desktop)

Testing

• Upload any .log or .txt file
• Click "START" to begin streaming
• Watch anomalies appear with color-coded borders
• Use filters to focus on specific anomaly types
• Export results to PDF

Closes #150