fix: standardize capitalization of error messages for Node.js checks

Author: shyim

internal/system/node.go

@@ -13,7 +13,7 @@ func GetInstalledNodeVersion() (string, error) {
 	// Check if Node.js is installed
 	nodePath, err := exec.LookPath("node")
 	if err != nil {
-		return "", fmt.Errorf("Node.js is not installed: %w", err)
+		return "", fmt.Errorf("node.js is not installed: %w", err)
 	}
 
 	// Get the Node.js version

internal/system/node_test.go

@@ -12,7 +12,7 @@ import (
 func TestGetNodeVersionNotInstalled(t *testing.T) {
 	t.Setenv("PATH", "")
 	_, err := GetInstalledNodeVersion()
-	assert.ErrorContains(t, err, "Node.js is not installed")
+	assert.ErrorContains(t, err, "node.js is not installed")
 }
 
 func TestGetNodeVersion(t *testing.T) {
@@ -30,15 +30,15 @@ func TestNodeVersionIsAtLeast(t *testing.T) {
 	hit, err := IsNodeVersionAtLeast("16.0.0")
 
 	assert.NoError(t, err)
-	assert.True(t, hit, "Node.js version should be at least 16.0.0")
+	assert.True(t, hit, "node.js version should be at least 16.0.0")
 }
 
 func TestNodeVersionIsNotAtLeast(t *testing.T) {
 	setupFakeNode(t, t.TempDir(), "14.17.0")
 	hit, err := IsNodeVersionAtLeast("16.0.0")
 
 	assert.NoError(t, err)
-	assert.False(t, hit, "Node.js version should not be at least 16.0.0")
+	assert.False(t, hit, "node.js version should not be at least 16.0.0")
 }
 
 func setupFakeNode(t *testing.T, tmpDir string, version string) {