Implement safe storage utility and update i18n handling to use it

src/js/utils/safe-storage.ts

@@ -0,0 +1,25 @@
+export const getStoredItem = (key: string): string | null => {
+  try {
+    return localStorage.getItem(key);
+  } catch {
+    return null;
+  }
+};
+
+export const setStoredItem = (key: string, value: string): boolean => {
+  try {
+    localStorage.setItem(key, value);
+    return true;
+  } catch {
+    return false;
+  }
+};
+
+export const removeStoredItem = (key: string): boolean => {
+  try {
+    localStorage.removeItem(key);
+    return true;
+  } catch {
+    return false;
+  }
+};