fix: close modal popups only on overlay mousedown

frontend/src/components/ClearHistoryModal.tsx

@@ -31,7 +31,12 @@ export function ClearHistoryModal({ onClose, onDone }: Props) {
   };
 
   return (
-    <div className="modal-overlay" onClick={onClose}>
+    <div
+      className="modal-overlay"
+      onMouseDown={(e) => {
+        if (e.target === e.currentTarget) onClose();
+      }}
+    >
       <div className="modal" onClick={(e) => e.stopPropagation()}>
         <div className="modal-header">
           <h2>Очистить историю операций</h2>