Relax type of capitalizeFirstLetter utility

client/src/utils/strings.test.ts

@@ -12,7 +12,7 @@ describe("capitalizeFirstLetter", () => {
     });
 
     it("returns empty string for undefined input", () => {
-        expect(capitalizeFirstLetter(undefined as unknown as string)).toBe("");
+        expect(capitalizeFirstLetter(undefined)).toBe("");
     });
 
     it("returns empty string for null input", () => {

client/src/utils/strings.ts

@@ -45,7 +45,7 @@ export function snakeCaseToTitleCase(str: string): string {
 /**
  * Capitalize the first letter of a string
  */
-export function capitalizeFirstLetter(str: string): string {
+export function capitalizeFirstLetter(str?: string): string {
     if (!str) {
         return "";
     }