console/frontend: better error formatting

common/helpers/strings.go

@@ -0,0 +1,13 @@
+package helpers
+
+import "unicode"
+
+// Capitalize turns the first letter of a string to its upper case version.
+func Capitalize(str string) string {
+	if len(str) == 0 {
+		return ""
+	}
+	r := []rune(str)
+	r[0] = unicode.ToUpper(r[0])
+	return string(r)
+}