fix(chart): normalize CRD filenames to use forward slashes on all platforms

Fixes https://github.com/helm/helm/issues/31585 by normalizing CRD Filename
values with filepath.ToSlash so Windows no longer emits backslashes. This
ensures TestCRDObjects passes cross-platform and CRD paths remain consistent.

Added test TestCRDObjectsWithSubchart to verify forward slash normalization
for both parent and subchart CRDs.

Signed-off-by: Insaf Hashem <hasheminsafo@gmail.com>
Signed-off-by: Helm Contributor <contributor@helm.sh>

internal/chart/v3/chart.go

@@ -162,7 +162,7 @@ func (ch *Chart) CRDObjects() []CRD {
 	// Find all resources in the crds/ directory
 	for _, f := range ch.Files {
 		if strings.HasPrefix(f.Name, "crds/") && hasManifestExtension(f.Name) {
-			mycrd := CRD{Name: f.Name, Filename: filepath.Join(ch.ChartFullPath(), f.Name), File: f}
+			mycrd := CRD{Name: f.Name, Filename: filepath.ToSlash(filepath.Join(ch.ChartFullPath(), f.Name)), File: f}
 			crds = append(crds, mycrd)
 		}
 	}

internal/chart/v3/chart_test.go

@@ -227,3 +227,53 @@ func TestCRDObjects(t *testing.T) {
 	crds := chrt.CRDObjects()
 	is.Equal(expected, crds)
 }
+
+func TestCRDObjectsWithSubchart(t *testing.T) {
+	modTime := time.Now()
+	
+	// Create a subchart
+	subchart := &Chart{
+		Metadata: &Metadata{
+			Name: "subchart",
+		},
+		Files: []*common.File{
+			{
+				Name:    "crds/subchartcrd.yaml",
+				ModTime: modTime,
+				Data:    []byte("subchart crd"),
+			},
+		},
+	}
+	
+	// Create a parent chart with a dependency
+	parentChart := &Chart{
+		Metadata: &Metadata{
+			Name: "parent",
+		},
+		Files: []*common.File{
+			{
+				Name:    "crds/parentcrd.yaml",
+				ModTime: modTime,
+				Data:    []byte("parent crd"),
+			},
+		},
+	}
+	
+	parentChart.AddDependency(subchart)
+	
+	is := assert.New(t)
+	crds := parentChart.CRDObjects()
+	
+	// Verify we have CRDs from both parent and subchart
+	is.Equal(2, len(crds))
+	
+	// Verify parent CRD has forward slashes (not backslashes)
+	is.Equal("crds/parentcrd.yaml", crds[0].Name)
+	is.Equal("parent/crds/parentcrd.yaml", crds[0].Filename)
+	is.NotContains(crds[0].Filename, "\\", "CRD filename should use forward slashes, not backslashes")
+	
+	// Verify subchart CRD has forward slashes (not backslashes)
+	is.Equal("crds/subchartcrd.yaml", crds[1].Name)
+	is.Equal("parent/charts/subchart/crds/subchartcrd.yaml", crds[1].Filename)
+	is.NotContains(crds[1].Filename, "\\", "CRD filename should use forward slashes, not backslashes")
+}