fix publishing

Author: dienhoa

.github/workflows/cross_platform_tests.yml

@@ -119,11 +119,18 @@ jobs:
       run: find wheels -type f -name "*.whl" | sort
       shell: bash
 
+    - name: Flatten wheel structure
+      run: |
+        mkdir -p dist
+        find wheels -name "*.whl" -exec cp {} dist/ \;
+        echo "Files in dist after flattening:"
+        ls -la dist/
+        
     - name: Upload combined wheels
       uses: actions/upload-artifact@v4
       with:
         name: all-wheels
-        path: wheels/*/*.whl
+        path: dist/*.whl
 
   publish_to_test_pypi:
     name: Publish Python distributions to TestPyPI
@@ -145,6 +152,8 @@ jobs:
       run: |
         echo "Files in dist/:"
         ls -la dist/
+        echo "Checking for .whl files specifically:"
+        find dist -name "*.whl" -type f
         
     - name: Publish to TestPyPI
       uses: pypa/gh-action-pypi-publish@release/v1