feat: notification bell with modal showing 10 latest notifications

public/assets/css/style.css

@@ -3170,3 +3170,139 @@ input[type="range"]::-moz-range-track {
     height: 6px;
     border-radius: 3px;
 }
+
+/* ==========================================================================
+   Notification Bell & Modal
+   ========================================================================== */
+
+.notification-btn-wrapper {
+    position: relative;
+    display: inline-flex;
+}
+
+.notification-btn {
+    position: relative;
+}
+
+.notification-badge {
+    position: absolute;
+    top: 2px;
+    right: 2px;
+    min-width: 16px;
+    height: 16px;
+    padding: 0 4px;
+    border-radius: 100px;
+    background: var(--danger);
+    color: #fff;
+    font-size: 0.6rem;
+    font-weight: 700;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    line-height: 1;
+    box-shadow: 0 0 0 2px var(--bg-secondary);
+    pointer-events: none;
+}
+
+.notif-item {
+    display: flex;
+    align-items: flex-start;
+    gap: 12px;
+    padding: 14px 18px;
+    border-bottom: 1px solid var(--border-color);
+    cursor: pointer;
+    transition: background 0.15s;
+}
+
+.notif-item:hover {
+    background: var(--bg-hover);
+}
+
+.notif-item:last-child {
+    border-bottom: none;
+}
+
+.notif-unread {
+    background: rgba(99, 102, 241, 0.04);
+}
+
+.notif-unread:hover {
+    background: rgba(99, 102, 241, 0.08);
+}
+
+.notif-icon {
+    width: 32px;
+    height: 32px;
+    border-radius: 50%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    flex-shrink: 0;
+    font-size: 0.85em;
+}
+
+.notif-icon.notif-danger { background: var(--danger-bg); color: var(--danger); }
+.notif-icon.notif-warning { background: var(--warning-bg); color: var(--warning); }
+.notif-icon.notif-info { background: var(--info-bg); color: var(--info); }
+
+.notif-content {
+    flex: 1;
+    min-width: 0;
+}
+
+.notif-title {
+    font-size: 0.88em;
+    font-weight: 600;
+    color: var(--text-primary);
+    margin-bottom: 2px;
+}
+
+.notif-message {
+    font-size: 0.82em;
+    color: var(--text-muted);
+    line-height: 1.4;
+    display: -webkit-box;
+    -webkit-line-clamp: 2;
+    -webkit-box-orient: vertical;
+    overflow: hidden;
+}
+
+.notif-time {
+    font-size: 0.72em;
+    color: var(--text-muted);
+    margin-top: 3px;
+    opacity: 0.7;
+}
+
+.notif-read .notif-title {
+    font-weight: 400;
+    opacity: 0.65;
+}
+
+.notif-dot {
+    width: 8px;
+    height: 8px;
+    border-radius: 50%;
+    background: var(--info);
+    flex-shrink: 0;
+    margin-top: 6px;
+}
+
+.btn-sm {
+    padding: 0.3rem 0.6rem;
+    font-size: 0.82rem;
+    border-radius: var(--radius-sm, 6px);
+}
+
+.btn-text {
+    background: none;
+    border: none;
+    color: var(--text-secondary);
+    cursor: pointer;
+    transition: color 0.15s;
+}
+
+.btn-text:hover {
+    color: var(--text-primary);
+    background: var(--bg-hover);
+}