fix: include whitespace characters \t, \r, \n

components/utils/base-64.utils.test.ts

@@ -36,6 +36,11 @@ describe("base-64.utils", () => {
       expect(fromBase64(wrapped)).toBe(message);
     });
 
+    test("should decode base64 of multiline text", () => {
+      const multiline = "This is the first line\n\nthis is another one";
+      expect(fromBase64(toBase64(multiline))).toBe(multiline);
+    });
+
     test("should throw an error for an invalid Base64 string", () => {
       expect(() => fromBase64("invalid_base64")).toThrow(
         "Invalid Base64 input"

components/utils/base-64.utils.ts

@@ -46,8 +46,9 @@ export function fromBase64(value: string): string {
 
 /**
  * Checks if the given string consists entirely of printable ASCII characters.
- * Printable ASCII characters are those in the range from space (0x20) to tilde (0x7E).
+ * Printable ASCII characters are those in the range from space (0x20) to tilde (0x7E),
+ * plus common whitespace characters (tab, carriage return, line feed).
  */
 export function isPrintableASCII(str: string): boolean {
-  return /^[\x20-\x7E]*$/.test(str);
+  return /^[\x20-\x7E\t\r\n]*$/.test(str);
 }