refactor: replace enabled prop with disabled in DigitalClock

src/__tests__/DigitalClock.test.tsx

@@ -24,21 +24,21 @@ describe("DigitalClock", () => {
     });
   });
 
-  it("renders nothing when disabled", () => {
-    const { container } = render(
+  it("renders the input as disabled when disabled prop is true", () => {
+    render(
       <DigitalClock
-        enabled={false}
+        disabled={true}
         currentTime={new Date(2025, 0, 1, 14, 30, 15)}
         onTimeChange={onTimeChangeMock}
       />,
     );
-    expect(container.innerHTML).toBe("");
+    const input = screen.getByTestId("time-input");
+    expect(input).toBeDisabled();
   });
 
   it("renders the digital time and input when enabled", () => {
     render(
       <DigitalClock
-        enabled={true}
         currentTime={new Date(2025, 0, 1, 14, 30, 15)}
         onTimeChange={onTimeChangeMock}
       />,
@@ -50,7 +50,6 @@ describe("DigitalClock", () => {
   it("calls onTimeChange when a valid time is entered", () => {
     render(
       <DigitalClock
-        enabled={true}
         currentTime={new Date(2025, 0, 1, 14, 30, 15)}
         onTimeChange={onTimeChangeMock}
       />,
@@ -68,7 +67,6 @@ describe("DigitalClock", () => {
   it("does not call onTimeChange when an invalid time is entered", () => {
     render(
       <DigitalClock
-        enabled={true}
         currentTime={new Date(2025, 0, 1, 14, 30, 15)}
         onTimeChange={onTimeChangeMock}
       />,