Refactor: rewrite GUI, add run.bat, update docs

- New GUI (gui.py) calls same core functions as CLI
- Add run.bat for parameterized CLI usage
- Simplify run_lesson1.bat to just call run.bat
- Update README and ARCHITECTURE docs
- Add LICENSE

run_lesson1.bat

@@ -1,13 +1,6 @@
 @echo off
-chcp 65001 >nul
-echo Cleaning pycache...
-rmdir /s /q "D:\F\NewI\opencode\daily-workspace\projects\piano-highlight-app\src\__pycache__" 2>nul
-rmdir /s /q "D:\F\NewI\opencode\daily-workspace\projects\piano-highlight-app\src\core\__pycache__" 2>nul
-echo Cache cleaned.
-echo.
-echo Running CLI...
-del "D:\F\NewI\opencode\daily-workspace\temp\cli_run_log.txt" 2>nul
-"D:\ProgramData\anaconda3\envs\py312_cuda\python.exe" "D:\F\NewI\opencode\daily-workspace\projects\piano-highlight-app\run_lesson1.py"
-echo.
-echo Exit: %errorlevel%
-pause
+:: 预置脚本：运行福田夜校第一节课
+call "%~dp0run.bat" ^
+    "D:\F\yc\课程上架\福田商圈夜校\课程视频\直播回放-03月18日.mp4" ^
+    "D:\F\yc\课程上架\福田商圈夜校\课程视频\钢琴演奏入门第一课.pptx" ^
+    "D:\F\NewI\opencode\daily-workspace\projects\piano-lesson-highlights\cases\lesson1\output_cli_full"