feat: increase Snackbar z-index so it appears over chatbot icon

packages/web/src/styles/theme.js

@@ -159,6 +159,10 @@ export const defaultTheme = createTheme({
       },
     },
   },
+  zIndex: {
+    // z-index must be bigger than chatbot's icon
+    snackbar: 2200000000,
+  },
   components: {
     MuiAppBar: {
       styleOverrides: {
@@ -297,6 +301,6 @@ export const mationTheme = createTheme(
         },
       },
     },
-  })
+  }),
 );
 export default defaultTheme;