init commit - calling this project finished as of now, may revisit if in the future spotify lifts the premium requirement.

ui.js

@@ -0,0 +1,19 @@
+function showError(msg) {
+    document.getElementById('data').innerText = msg;
+}
+function updateTrackInfo(track) {
+    if (!track) {
+        document.getElementById('track-info').innerText = 'Nothing playing or no active device.';
+        return;
+    }
+    if (track.item) {
+        document.getElementById('track-info').innerText =
+            `Now Playing: ${track.item.name} by ${track.item.artists.map(a => a.name).join(", ")}`;
+    } else {
+        document.getElementById('track-info').innerText = 'Nothing playing.';
+    }
+}
+function showControls() {
+    document.getElementById('controls').style.display = '';
+    document.getElementById('login-btn').style.display = 'none';
+}