Add Video Learning Agent for short video platforms

Features:
- VideoLearningAgent for automated video watching on Douyin/Kuaishou/TikTok
- Web dashboard UI for video learning sessions
- Real-time progress tracking with screenshot capture
- App detection using get_current_app() for accurate recording
- Session management with pause/resume/stop controls

Technical improvements:
- Simplified video detection logic using direct app detection
- Full base64 hash for sensitive screenshot change detection
- Immediate stop when target video count is reached
- Fixed circular import issues with ModelConfig

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/run_video_learning_demo.bat

@@ -0,0 +1,35 @@
+@echo off
+REM Video Learning Demo Script for Windows
+REM This script starts the dashboard and opens the video learning page
+
+echo ============================================
+echo AutoGLM Video Learning Demo
+echo ============================================
+echo.
+echo Starting Dashboard...
+echo.
+
+REM Start the dashboard in background
+start "AutoGLM Dashboard" python -m uvicorn dashboard.main:app --host 0.0.0.0 --port 8080 --reload
+
+echo Waiting for dashboard to start...
+timeout /t 3 /nobreak > nul
+
+echo.
+echo Dashboard starting at: http://localhost:8080
+echo Opening Video Learning page in browser...
+echo.
+
+REM Open the video learning page
+start http://localhost:8080/static/video-learning.html
+
+echo.
+echo ============================================
+echo Video Learning Demo is ready!
+echo ============================================
+echo.
+echo Press Ctrl+C to stop the dashboard
+echo.
+
+REM Keep the script running
+pause