Implement unban events and API and also add it to the Recent stored events, as well some cleanups

pkg/web/static/fail2ban-ui.css

@@ -26,6 +26,10 @@
     display: none;
 }
 
+#serverManagerList {
+    min-height: 480px;
+}
+
 /* Custom scrollbar */
 ::-webkit-scrollbar {
     width: 8px;
@@ -168,6 +172,18 @@ mark {
     box-shadow: 0 15px 20px -3px rgba(0, 0, 0, 0.15);
 }
 
+.toast-unban-event {
+    background-color: #14532d;
+    pointer-events: auto;
+    cursor: pointer;
+}
+
+.toast-unban-event:hover {
+    background-color: #166534;
+    transform: translateY(-2px);
+    box-shadow: 0 15px 20px -3px rgba(0, 0, 0, 0.15);
+}
+
 /* Backend Status Indicator */
 #backendStatus {
     display: flex;