correction calendrier année

src/pages/Home/components/Calendar/calendar.jsx

@@ -19,7 +19,7 @@ Calendar() {
     const today = new Date();
 
     const [currentMonth, setCurrentMonth] = useState(today.getMonth());
-    const [currentYear] = useState(today.getFullYear());
+    const [currentYear, setCurrentYear] = useState(today.getFullYear());
     const [selectedDay, setSelectedDay] = useState(null);
 
     const eventsByDate = useMemo(() => {
@@ -68,9 +68,31 @@ Calendar() {
             <div className={styles.calendarContainer}>
 
                 <div className={styles.calendarHeader}>
-                    <button onClick={() => setCurrentMonth(m => m === 0 ? 11 : m - 1)}>◀</button>
+                    <button
+                        onClick={() => {
+                            if (currentMonth === 0) {
+                                setCurrentMonth(11);
+                                setCurrentYear(y => y - 1);
+                            } else {
+                                setCurrentMonth(m => m - 1);
+                            }
+                        }}
+                    >
+                        ◀
+                    </button>
                     <p>{monthNames[currentMonth]} {currentYear}</p>
-                    <button onClick={() => setCurrentMonth(m => m === 11 ? 0 : m + 1)}>▶</button>
+                    <button
+                        onClick={() => {
+                            if (currentMonth === 11) {
+                                setCurrentMonth(0);
+                                setCurrentYear(y => y + 1);
+                            } else {
+                                setCurrentMonth(m => m + 1);
+                            }
+                        }}
+                    >
+                        ▶
+                    </button>
                 </div>
 
                 <table className={styles.calendar}>