[FeodorFitsner]

Release Windows apps ship Python's debug modules next to the release ones (_ctypes.pyd and _ctypes_d.pyd, _ssl.pyd and _ssl_d.pyd, …). In a Flet app built with flet build windows that's 23 files, ~10 MB (about 10% of the unpacked app), and when the app is code-signed, as many extra signatures.

Cause

python-build's Windows package carries both Release and Debug builds of CPython, so Debug Flutter builds can load the debug runtime. Before 3.0.0, CopyPythonDLLs removed the debug files from Release builds:

COMMAND IF "$<$<CONFIG:Release>:release>" == "release" DEL ".../runner/Release/DLLs\*_d.*" /S /Q

The 3.0.0 rewrite (#209) replaced the cmd.exe DELs with cmake -E rm / rm_globs.cmake. The .ico, .cat, tcl86t.dll and tk86t.dll removals came across, but this Release-only one didn't; only its comment stayed.

Fix

CopyPythonDLLs removes DLLs/*_d.* again in every non-Debug build (Release and Profile), through the same rm_globs.cmake helper. Debug builds keep them ($<IF:$<CONFIG:Debug>,__none__,*_d.*>; __none__ matches nothing). The python3*_d.dll / dart_bridge_d.dll choice is unchanged: serious_python_windows_bundled_libraries already picks those per config.

Also:

• Version bump to 6.1.1 across all packages (pubspecs, Android build.gradle.kts, the Darwin podspec, the example lockfiles), with changelog entries.
• The comment above the Tk removal no longer claims to strip the debug modules.

Testing

Not built on Windows from this branch yet. Seen in a Release app built with 6.1.0 (flet build windows on a Flet Studio builder): DLLs/ held 23 *_d.* files, 9.9 MB uncompressed. After the release, the same build should list none.