feat(webui): upgrade settings and sidebar controls (#3906)

* feat(settings): expand settings api payload

* feat(webui): build app-style settings center

* feat(webui): add centered chat search dialog

* fix(webui): shorten chat search label

* fix(webui): center dialog entrance animation

* fix(webui): simplify chat search results

* fix(webui): tighten mobile settings navigation

* feat(webui): persist sidebar state

* feat(webui): add sidebar organization controls

* refactor(webui): organize backend helpers

* refactor(webui): remove utils compatibility shims

* refactor(session): move shared webui helpers out of webui package

* feat(webui): add image generation settings

* style(webui): refine settings overview layout

* fix(webui): localize settings zh-CN copy

* style(webui): add settings status indicators

* feat(webui): show sidebar run indicators

* fix(webui): persist sidebar run indicators

* fix(webui): highlight settings pending status

* fix(webui): align settings test with provider update

* fix(utils): preserve legacy webui helper imports

webui/src/components/ui/dropdown-menu.tsx

@@ -47,11 +47,16 @@ const DropdownMenuSubContent = React.forwardRef<
 ));
 DropdownMenuSubContent.displayName = DropdownMenuPrimitive.SubContent.displayName;
 
+interface DropdownMenuContentProps
+  extends React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Content> {
+  portalContainer?: HTMLElement | null;
+}
+
 const DropdownMenuContent = React.forwardRef<
   React.ElementRef<typeof DropdownMenuPrimitive.Content>,
-  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Content>
->(({ className, sideOffset = 4, ...props }, ref) => (
-  <DropdownMenuPrimitive.Portal>
+  DropdownMenuContentProps
+>(({ className, sideOffset = 4, portalContainer, ...props }, ref) => (
+  <DropdownMenuPrimitive.Portal container={portalContainer ?? undefined}>
     <DropdownMenuPrimitive.Content
       ref={ref}
       sideOffset={sideOffset}