frontend: fix RTL sidebar group chevron; restore header buttons

- SidebarMenuAction (the expand chevron on Patients/Pharmacy/Messages) used a
  physical right-1, so in Arabic it sat on the right over the icons. Use the
  logical end-1 so it's on the right in English and the left in Arabic, clear of
  the icons.
- Revert the earlier header change: the notification bell and collapse toggle go
  back to their original placement (no RTL column stacking, no mirrored glyph,
  notifications popover back to side="right").

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/components/sidebar-02/app-sidebar.tsx

@@ -31,8 +31,7 @@ export function DashboardSidebar() {
   const { t, i18n } = useTranslation();
   // Anchor the sidebar to the right for RTL locales (Arabic) so the whole shell
   // mirrors instead of leaving the fixed sidebar pinned physically left.
-  const isRtl = dirFor(i18n.language) === "rtl";
-  const side = isRtl ? "right" : "left";
+  const side = dirFor(i18n.language) === "rtl" ? "right" : "left";
   const role = useActiveRole();
   const { allowed: aiAllowed } = useAiAccess();
   const isCollapsed = state === "collapsed";
@@ -65,11 +64,7 @@ export function DashboardSidebar() {
           "flex md:pt-3.5",
           isCollapsed
             ? "flex-row items-center justify-between gap-y-4 md:flex-col md:items-start md:justify-start"
-            : "flex-row items-center justify-between",
-          // RTL (Arabic): stack the logo and the toggle/bell controls into a
-          // right-aligned column so the collapse arrow sits ABOVE the nav icons
-          // instead of being pinned to the opposite (left) edge.
-          isRtl && !isCollapsed && "flex-col items-end justify-start gap-y-3"
+            : "flex-row items-center justify-between"
         )}
       >
         <Tooltip>

frontend/components/sidebar-02/nav-notifications.tsx

@@ -15,7 +15,6 @@ import {
   MenuSeparator,
   MenuTrigger,
 } from "@/components/ui/menu";
-import { dirFor } from "@/lib/i18n/config";
 import { markNotificationRead, notificationHref } from "@/lib/notifications";
 import { useNotifications } from "@/lib/use-notifications";
 
@@ -31,11 +30,9 @@ function relativeTime(iso: string): string {
 }
 
 export function NotificationsPopover() {
-  const { t, i18n } = useTranslation();
+  const { t } = useTranslation();
   const router = useRouter();
   const { items, unread, markAllRead } = useNotifications();
-  // Open toward the content side; flips to the left under RTL.
-  const popupSide = dirFor(i18n.language) === "rtl" ? "left" : "right";
 
   return (
     <Menu
@@ -61,7 +58,7 @@ export function NotificationsPopover() {
           </span>
         )}
       </MenuTrigger>
-      <MenuPopup side={popupSide} className="my-6 w-80">
+      <MenuPopup side="right" className="my-6 w-80">
         <MenuGroup>
           <MenuGroupLabel>{t("nav.notifications")}</MenuGroupLabel>
         </MenuGroup>

frontend/components/ui/sidebar.tsx

@@ -299,8 +299,7 @@ export function SidebarTrigger({
       variant="ghost"
       {...props}
     >
-      {/* Mirror the panel arrow under RTL so it points toward the sidebar edge. */}
-      <PanelLeftIcon className="rtl:rotate-180" />
+      <PanelLeftIcon />
       <span className="sr-only">Toggle Sidebar</span>
     </Button>
   );
@@ -597,7 +596,7 @@ export function SidebarMenuAction({
 }): React.ReactElement {
   const defaultProps = {
     className: cn(
-      "absolute top-1.5 right-1 flex aspect-square w-5 items-center justify-center rounded-lg p-0 text-sidebar-foreground outline-hidden ring-sidebar-ring transition-transform hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 peer-hover/menu-button:text-sidebar-accent-foreground [&>svg:not([class*='size-'])]:size-4 [&>svg]:shrink-0",
+      "absolute top-1.5 end-1 flex aspect-square w-5 items-center justify-center rounded-lg p-0 text-sidebar-foreground outline-hidden ring-sidebar-ring transition-transform hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 peer-hover/menu-button:text-sidebar-accent-foreground [&>svg:not([class*='size-'])]:size-4 [&>svg]:shrink-0",
       // Increases the hit area of the button on mobile.
       "after:absolute after:-inset-2 md:after:hidden",
       "peer-data-[size=sm]/menu-button:top-1",