Fix: NSIS script and DLL copy locations

1. NSIS: Reverted to \\*.* pattern (copy from build/)
2. Workflow: DLLs copy to build/ (after cd build), not workspace
3. Both changes ensure DLLs end up in BUILD_DIR where NSIS picks them up

This should fix 'DLLs not found' when running installed pollymc.exe

Author: corecommit

.github/workflows/build.yml

@@ -81,7 +81,7 @@ jobs:
           cd build
           /mingw64/bin/windeployqt6.exe --release pollymc.exe
 
-          # Copy MinGW runtime DLLs explicitly
+          # Copy MinGW runtime DLLs explicitly to build/ (BUILD_DIR)
           for dll in libgcc_s_seh-1.dll libstdc++-6.dll libwinpthread-1.dll; do
             if [ -f "/mingw64/bin/$dll" ]; then
               cp -f "/mingw64/bin/$dll" .
@@ -101,8 +101,8 @@ jobs:
             done
           done
 
-          # List all DLLs to verify
-          echo "=== DLLs in build directory ==="
+          # List all DLLs to verify - they should be in build/
+          echo "=== DLLs in build/ directory ==="
           ls -la *.dll
 
       - name: Get version