Fix mobile locale select under drawer

Select menus portal at z-3 while drawers sit at z-5, so
the popup opened behind the drawer. Portal into the drawer
panel instead. Point .env.example VITE_API_URL at the slug
subdomain with a local Vite note.

Signed-off-by: Émile Ré <emile@probo.com>

apps/compliance-portal/.env.example

@@ -1,7 +1,7 @@
-# GraphQL API origin. Default matches other apps (probod on :8080). For local
-# Vite development, set this to http://localhost:5174 so the browser hits the
-# Vite origin and /graphql is proxied (see vite.config.ts).
-VITE_API_URL=http://localhost:8080
+# GraphQL API origin (compliance-portal HTTPS origin; <slug> is the portal
+# slug). For local Vite development, set this to http://localhost:5174 so the
+# browser hits the Vite origin and /graphql is proxied (see vite.config.ts).
+VITE_API_URL=https://<slug>.probopage.localhost
 
 # Vite /graphql proxy target (compliance-portal HTTPS origin; <slug> is the
 # portal slug). Required for local Vite development — uncomment and set the

apps/compliance-portal/src/components/TopBar/LocaleSelect.tsx

@@ -23,6 +23,7 @@ import { Select } from "@probo/ui/src/v2/Select/Select";
 import { SelectItem } from "@probo/ui/src/v2/Select/SelectItem";
 import { SelectPopup } from "@probo/ui/src/v2/Select/SelectPopup";
 import { SelectTrigger } from "@probo/ui/src/v2/Select/SelectTrigger";
+import type { RefObject } from "react";
 import { useTranslation } from "react-i18next";
 
 import {
@@ -38,6 +39,9 @@ interface LocaleSelectProps {
   persist?: boolean;
   // Called after a locale change is requested (e.g. close the mobile drawer).
   onLocaleChange?: () => void;
+  // Portal target for the menu. Required inside a Drawer/Dialog so the popup
+  // is not painted under the modal layer (Select defaults to body + z-3).
+  portalContainer?: RefObject<HTMLElement | null>;
 }
 
 // Compact locale control for the top bar (guest and mobile). Uses the v2 Select
@@ -45,6 +49,7 @@ interface LocaleSelectProps {
 export function LocaleSelect({
   persist = false,
   onLocaleChange,
+  portalContainer,
 }: LocaleSelectProps) {
   const { t } = useTranslation();
   const locale = useLocale();
@@ -75,7 +80,7 @@ export function LocaleSelect({
           </span>
         )}
       </SelectTrigger>
-      <SelectPopup>
+      <SelectPopup container={portalContainer}>
         {URL_LOCALES.map(code => (
           <SelectItem key={code} value={code}>
             {URL_LOCALE_LABELS[code]}

apps/compliance-portal/src/components/TopBar/TopBarMobileNav.tsx

@@ -38,7 +38,7 @@ import { DrawerTitle } from "@probo/ui/src/v2/Drawer/DrawerTitle";
 import { DrawerTrigger } from "@probo/ui/src/v2/Drawer/DrawerTrigger";
 import { IconButton } from "@probo/ui/src/v2/IconButton/IconButton";
 import { Text } from "@probo/ui/src/v2/typography/Text";
-import { useState } from "react";
+import { useRef, useState } from "react";
 import { useTranslation } from "react-i18next";
 import { graphql, useFragment } from "react-relay";
 import { useLocation } from "react-router";
@@ -76,6 +76,9 @@ export function TopBarMobileNav({ identityKey }: TopBarMobileNavProps) {
   const { openSubscribe, isSubscribed, unsubscribe, isUnsubscribing } = useSubscribeDialog();
   const [signOut, isSigningOut] = useSignOut();
   const [open, setOpen] = useState(false);
+  // Select menus portal to body at z-3 by default; mount them on the drawer
+  // popup so they stack inside the modal layer (z-5) instead of under it.
+  const drawerPopupRef = useRef<HTMLDivElement>(null);
   const identity = useFragment(topBarMobileNavFragment, identityKey);
   const localizedPath = useLocalizedPath();
 
@@ -103,7 +106,7 @@ export function TopBarMobileNav({ identityKey }: TopBarMobileNavProps) {
           )}
         />
       </div>
-      <DrawerPopup side="right">
+      <DrawerPopup side="right" ref={drawerPopupRef}>
         <DrawerHeader>
           <DrawerTitle>{t("topBar.menuTitle")}</DrawerTitle>
           <DrawerClose
@@ -147,6 +150,7 @@ export function TopBarMobileNav({ identityKey }: TopBarMobileNavProps) {
             <LocaleSelect
               persist={identity != null}
               onLocaleChange={close}
+              portalContainer={drawerPopupRef}
             />
           </div>
           {identity == null

packages/ui/src/v2/Drawer/DrawerPopup.tsx

@@ -33,15 +33,21 @@ export type DrawerPopupProps
 
 // Portal + dimmed backdrop + edge-aligned popup. Children compose the header /
 // body / footer regions inside Base UI's Content (swipe-safe text selection).
+// `ref` lands on the Popup panel (not the viewport) so nested menus can portal
+// into the drawer stacking context.
 export function DrawerPopup(props: DrawerPopupProps) {
-  const { className, children, side, ...popupProps } = props;
+  const { className, children, side, ref, ...popupProps } = props;
   const slots = drawer({ side });
 
   return (
     <BaseDrawer.Portal>
       <BaseDrawer.Backdrop className={slots.backdrop()} />
       <BaseDrawer.Viewport className={slots.viewport()}>
-        <BaseDrawer.Popup className={slots.popup({ className })} {...popupProps}>
+        <BaseDrawer.Popup
+          ref={ref}
+          className={slots.popup({ className })}
+          {...popupProps}
+        >
           <BaseDrawer.Content className={slots.content()}>
             {children}
           </BaseDrawer.Content>

packages/ui/src/v2/Select/SelectPopup.tsx

@@ -27,6 +27,9 @@ export type SelectPopupProps
   = & Omit<ComponentProps<typeof BaseSelect.Popup>, "className">
     & {
       className?: string;
+      // Mount inside a modal/drawer so the menu stacks above that layer
+      // (body portal uses z-3, below drawers at z-5).
+      container?: ComponentProps<typeof BaseSelect.Portal>["container"];
       // Positioner placement passthrough.
       side?: ComponentProps<typeof BaseSelect.Positioner>["side"];
       align?: ComponentProps<typeof BaseSelect.Positioner>["align"];
@@ -36,13 +39,13 @@ export type SelectPopupProps
 // Portal + positioner + styled popup holding the select items.
 export function SelectPopup(props: SelectPopupProps) {
   const {
-    className, children,
+    className, children, container,
     side = "bottom", align = "start", sideOffset = 4,
     ...popupProps
   } = props;
 
   return (
-    <BaseSelect.Portal>
+    <BaseSelect.Portal container={container}>
       {/* z-3 on the Positioner so the portaled root wins over in-page z-1. */}
       <BaseSelect.Positioner className="z-3" side={side} align={align} sideOffset={sideOffset}>
         <BaseSelect.Popup className={selectPopup({ className })} {...popupProps}>