Fix translation updates and improve LocaleSwitcher usability (#686)

### Summary & Motivation

Fix an issue where not all translations using `t(..)` were updated when
changing the language, causing some text to remain in the previous
language until a full page reload. This ensures the correct language is
applied immediately across the entire UI.

Additionally, improve the **LocaleSwitcher** by enabling language
changes via keyboard navigation and updating its styling to align with
the rest of the UI. Spacing adjustments have also been made to the top
menu buttons to prevent border cropping.

### Checklist

- [x] I have added tests, or done manual regression tests
- [x] I have updated the documentation, if necessary

application/account-management/WebApp/shared/components/topMenu/index.tsx

@@ -22,7 +22,7 @@ export function TopMenu({ children }: Readonly<TopMenuProps>) {
         {children}
       </Breadcrumbs>
       <div className="flex flex-row gap-6 items-center">
-        <span className="hidden sm:flex">
+        <span className="hidden sm:flex gap-2">
           <ThemeModeSelector />
           <Button variant="icon" aria-label={t`Help`}>
             <LifeBuoyIcon size={20} />

application/back-office/WebApp/shared/components/topMenu/index.tsx

@@ -24,7 +24,7 @@ export function TopMenu({ children }: Readonly<TopMenuProps>) {
         {children}
       </Breadcrumbs>
       <div className="flex flex-row gap-6 items-center">
-        <span className="hidden sm:flex">
+        <span className="hidden sm:flex gap-2">
           <ThemeModeSelector />
           <Button variant="icon" aria-label={t`Help`}>
             <LifeBuoyIcon size={20} />

application/shared-webapp/infrastructure/translations/LocaleSwitcher.tsx

@@ -1,17 +1,14 @@
-import { LanguagesIcon } from "lucide-react";
+import { LanguagesIcon, CheckIcon } from "lucide-react";
 import { type Locale, translationContext } from "./TranslationContext";
-import { use, useContext, useMemo, useState } from "react";
+import { use, useContext, useMemo } from "react";
 import { useLingui } from "@lingui/react";
 import { Button } from "@repo/ui/components/Button";
-import { ListBox, ListBoxItem } from "@repo/ui/components/ListBox";
-import { Popover } from "@repo/ui/components/Popover";
-import { DialogTrigger } from "@repo/ui/components/Dialog";
-import type { Selection } from "react-aria-components";
+import { Menu, MenuItem, MenuTrigger } from "@repo/ui/components/Menu";
 import { AuthenticationContext } from "@repo/infrastructure/auth/AuthenticationProvider";
 import { preferredLocaleKey } from "./constants";
+import type { Key } from "@react-types/shared";
 
 export function LocaleSwitcher() {
-  const [isOpen, setIsOpen] = useState(false);
   const { setLocale, getLocaleInfo, locales } = use(translationContext);
   const { i18n } = useLingui();
   const { userInfo } = useContext(AuthenticationContext);
@@ -25,52 +22,45 @@ export function LocaleSwitcher() {
     [locales, getLocaleInfo]
   );
 
-  const handleLocaleChange = async (selection: Selection) => {
-    const newLocale = [...selection][0] as Locale;
-    if (newLocale != null) {
+  const handleLocaleChange = (key: Key) => {
+    const locale = key.toString() as Locale;
+    if (locale !== currentLocale) {
       if (userInfo?.isAuthenticated) {
-        await fetch("/api/account-management/users/change-locale", {
+        void fetch("/api/account-management/users/me/change-locale", {
           method: "PUT",
           headers: { "Content-Type": "application/json" },
-          body: JSON.stringify({ locale: newLocale })
+          body: JSON.stringify({ locale })
         })
           .then(async (_) => {
-            await setLocale(newLocale);
-            localStorage.setItem(preferredLocaleKey, newLocale);
+            await setLocale(locale);
+            localStorage.setItem(preferredLocaleKey, locale);
           })
           .catch((error) => console.error("Failed to update locale:", error));
       } else {
-        await setLocale(newLocale);
-        localStorage.setItem(preferredLocaleKey, newLocale);
+        void setLocale(locale).then(() => {
+          localStorage.setItem(preferredLocaleKey, locale);
+        });
       }
-
-      setIsOpen(false);
     }
   };
 
   const currentLocale = i18n.locale as Locale;
 
   return (
-    <DialogTrigger onOpenChange={setIsOpen} isOpen={isOpen}>
-      <Button variant="icon">
-        <LanguagesIcon />
+    <MenuTrigger>
+      <Button variant="icon" aria-label="Select language">
+        <LanguagesIcon className="h-5 w-5" />
       </Button>
-      <Popover>
-        <ListBox
-          selectionMode="single"
-          selectionBehavior="replace"
-          onSelectionChange={handleLocaleChange}
-          selectedKeys={[currentLocale]}
-          className="border-none px-4 py-2"
-          aria-label="Select a language"
-        >
-          {items.map((item) => (
-            <ListBoxItem key={item.id} id={item.id}>
-              {item.label}
-            </ListBoxItem>
-          ))}
-        </ListBox>
-      </Popover>
-    </DialogTrigger>
+      <Menu onAction={handleLocaleChange} aria-label="Select language">
+        {items.map((item) => (
+          <MenuItem key={item.id} id={item.id} textValue={item.label}>
+            <div className="flex items-center gap-2">
+              <span>{item.label}</span>
+              {item.id === currentLocale && <CheckIcon className="h-4 w-4 ml-auto" />}
+            </div>
+          </MenuItem>
+        ))}
+      </Menu>
+    </MenuTrigger>
   );
 }

application/shared-webapp/infrastructure/translations/Translation.tsx

@@ -1,4 +1,4 @@
-import { useMemo } from "react";
+import { useMemo, useState } from "react";
 import { I18nProvider } from "@lingui/react";
 import { i18n, type Messages } from "@lingui/core";
 import localeMap from "./i18n.config.json";
@@ -118,19 +118,25 @@ type TranslationProviderProps = {
 };
 
 function TranslationProvider({ children, translation }: Readonly<TranslationProviderProps>) {
+  const [currentLocale, setCurrentLocale] = useState(i18n.locale);
+
   const value: TranslationContext = useMemo(
     () => ({
       setLocale: async (locale: string) => {
         await translation.dynamicActivate(locale);
+        setCurrentLocale(locale); // Update state to force re-render
       },
       locales: translation.locales,
       getLocaleInfo: translation.getLocaleInfo
     }),
     [translation]
   );
+
   return (
     <TranslationContextProvider value={value}>
-      <I18nProvider i18n={i18n}>{children}</I18nProvider>
+      <I18nProvider key={currentLocale} i18n={i18n}>
+        {children}
+      </I18nProvider>
     </TranslationContextProvider>
   );
 }