[WEB] [JS-MANAGE ALERTS] Validation Error in "Add Alert"

**Steps**:

1. Open a web browser and navigate to the website: "https://dearjob.org".
2. On the website's homepage, locate and click on the "LOGIN" link in the menu tab.
3. Enter the registered Jobseeker ID and password, then click on the login button or press enter.
4. After successful login, click on the "JOB SEEKER" menu and select "MANAGE ALERTS DISPLAY".
5. Click on the "Add Alert" button to create a new job alert.

**Actual Result**:

In the "Add Alert" page, the alert name field only accepts letters and not numbers. Additionally, the displayed validation message for this field states "Please Enter Alert Name" instead of providing a more specific instruction such as "Enter a minimum of 4 characters."

**Expected Result**:

The "Add Alert" page should accept both letters and numbers in the alert name field. Furthermore, the validation message for this field should accurately instruct the user to enter a minimum of 4 characters rather than a generic message. This will ensure a clearer and more accurate indication of the required input for the alert name field.