fix(ui): принудительно скрывать [hidden], чтобы неактивные вкладки Radix не давали огромный отступ

client/src/index.css

@@ -385,6 +385,13 @@ td.formula-highlight {
   padding-bottom: env(safe-area-inset-bottom, 0);
 }
 
+/* Fix: Tailwind utility .flex overrides preflight [hidden] rule.
+   Radix primitives (Tabs, Dialog, Accordion, etc.) use hidden attr for inactive/unmounted content.
+   Ensure [hidden] always hides even when combined with flex/grid/display utilities. */
+[hidden] {
+  display: none !important;
+}
+
 /* Fix Radix ScrollArea display:table horizontal overflow in chats */
 .chat-scroll-area [data-radix-scroll-area-viewport] > div {
   display: block !important;