feature/prevent-from-accident-reloading (#1411)

## Description:

Added prevention from accident reload of page

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [ ] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

## Please put your Discord username so you can be contacted if a bug or
regression is found:

@qqkedsi
<img width="526" height="896" alt="image"
src="https://github.com/user-attachments/assets/22b273a5-de50-4567-93f0-353cea36ea29"
/>

src/client/index.html

@@ -413,6 +413,10 @@
           document.documentElement.classList.remove("preload");
         });
       });
+      window.addEventListener("beforeunload", function (e) {
+        e.preventDefault();
+        e.returnValue = "Are you sure you want to leave?";
+      });
     </script>
 
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