Rebuild .exe with CEF + win32gui fixes

- Updated build.spec with win32gui/win32con hidden imports
- Updated requirements_win.txt with cefpython3 docs
- Rebuilt .exe at 2026-07-24 14:41 (143 MB with CEF)
- All 12 resources bundled (icons, intro1.mp4)
- development-track.md updated with BUG-007, BUG-008

windows/venv_build/Scripts/deactivate.bat

@@ -0,0 +1,22 @@
+@echo off
+
+if defined _OLD_VIRTUAL_PROMPT (
+    set "PROMPT=%_OLD_VIRTUAL_PROMPT%"
+)
+set _OLD_VIRTUAL_PROMPT=
+
+if defined _OLD_VIRTUAL_PYTHONHOME (
+    set "PYTHONHOME=%_OLD_VIRTUAL_PYTHONHOME%"
+    set _OLD_VIRTUAL_PYTHONHOME=
+)
+
+if defined _OLD_VIRTUAL_PATH (
+    set "PATH=%_OLD_VIRTUAL_PATH%"
+)
+
+set _OLD_VIRTUAL_PATH=
+
+set VIRTUAL_ENV=
+set VIRTUAL_ENV_PROMPT=
+
+:END