feat: Implement dynamic Oscar year selection

This commit introduces the ability to select and manage the active Oscar year. This change affects page titles, API requests, and data filtering across the application, ensuring that all views and statistics are relevant to the chosen year.

Co-authored-by: mathieumoran1 <[email protected]>

public/js/app_user-stat.js

@@ -1,6 +1,18 @@
 window.onload = async function () {
     const token = localStorage.getItem('auth_token');
 
+    async function fetchActiveYear() {
+      try {
+        const res = await fetch('/api/settings/year', { method: 'GET' });
+        if (!res.ok) throw new Error('Failed to fetch active year');
+        const data = await res.json();
+        const year = Number(data?.year);
+        return Number.isInteger(year) ? year : null;
+      } catch (_) {
+        return null;
+      }
+    }
+
     if (token) {
       try {
         const decoded = JSON.parse(atob(token.split('.')[1])); // Manually decoding JWT
@@ -28,7 +40,15 @@ window.onload = async function () {
     }
 
     try {
-      const statsRes = await fetch('/api/users/stats', {
+      const activeYear = await fetchActiveYear();
+      if (activeYear) {
+        document.title = `Pool Oscars ${activeYear} - Statistiques des utilisateurs`;
+        const h2 = document.querySelector('h2');
+        if (h2) h2.textContent = `Statistiques des utilisateurs (${activeYear})`;
+      }
+
+      const statsUrl = activeYear ? `/api/users/stats?year=${encodeURIComponent(String(activeYear))}` : '/api/users/stats';
+      const statsRes = await fetch(statsUrl, {
         method: 'GET',
         headers: {
           'Authorization': `Bearer ${token}`