External Data

innerHTML Injection in postAlert(): Glitch.me Data Renders Unsanitized

The `postAlert()` function fetched alert data from a Glitch.me endpoint and injected it directly into the DOM using `innerHTML`, enabling arbitrary JavaScript execution if that external source was compromised. The fix replaces the HTML string concatenation with safe DOM API methods: `document.createTextNode()` for content and `addEventListener()` for event handlers, eliminating the injection vector entirely.