feat: update colors for v4 (#10660)

Porting changes from https://github.com/chatwoot/chatwoot/pull/10552

---------

Co-authored-by: Pranav <pranav@chatwoot.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: Vishnu Narayanan <vishnu@chatwoot.com>
Co-authored-by: Sojan <sojan@pepalo.com>
Co-authored-by: iamsivin <iamsivin@gmail.com>
Co-authored-by: Pranav <pranavrajs@gmail.com>

app/javascript/dashboard/components-next/dialog/Dialog.vue

@@ -150,6 +150,6 @@ defineExpose({ open, close });
 
 <style scoped>
 dialog::backdrop {
-  @apply dark:bg-n-alpha-white bg-n-alpha-black2;
+  @apply bg-n-alpha-black1 backdrop-blur-[4px];
 }
 </style>