add dropdown year as AY yyyy formate and seprate css files commit

static/js/year_dropdown.js

@@ -0,0 +1,23 @@
+document.addEventListener("DOMContentLoaded", function () {
+  const yearDropdown = document.getElementById("year");
+
+  const currentYear = new Date().getFullYear();
+  const startYear = 1990;
+
+  for (let y = currentYear; y >= startYear; y--) {
+    let nextYear = y + 1;
+
+    let option = document.createElement("option");
+
+    // Backend receives only first year (example 2024)
+    option.value = y;
+
+    // User sees (example AY 2024–2025)
+    option.textContent = `AY ${y}-${nextYear}`;
+
+    yearDropdown.appendChild(option);
+  }
+});
+
+
+