Revert "feat(panel): wire role-switcher into the app shell"

This reverts commit 50b8487ff5.

panel/src/components/AppShell.tsx

@@ -5,11 +5,8 @@ import { useTranslation } from "react-i18next";
 import * as SelectPrimitive from "@radix-ui/react-select";
 import { cn } from "@/lib/utils";
 import { useTier } from "@/lib/tier";
-import { type NavSection } from "@/lib/nav";
-import { sectionsForView } from "@/lib/viewmode";
-import { useViewMode } from "@/lib/viewmode-store";
+import { visibleSections, type NavSection } from "@/lib/nav";
 import { Select, SelectContent, SelectItem } from "@/components/ui/select";
-import { RoleSwitcher } from "@/components/RoleSwitcher";
 import { useTheme } from "@/lib/theme";
 import { api } from "@/lib/api";
 
@@ -141,14 +138,11 @@ function ThemeToggle() {
 
 export function AppShell() {
   const { isAdmin } = useTier();
-  const { view } = useViewMode();
   const { t, i18n } = useTranslation("navigation");
-  // Sections are derived from is_admin AND the chosen home: visibleSections drops
-  // every admin-gated section for a non-admin (fail-closed — false while /me loads or
-  // on failure), then the role-switcher's view narrows further to the home the admin
-  // is currently viewing. sectionsForView can only ever narrow, never widen, so an
-  // admin who steps down to the User-home sees a plain user's sidebar.
-  const sections = sectionsForView(view, isAdmin);
+  // Sections are derived purely from is_admin: User-Side always, Admin/SysAdmin
+  // only for admins. isAdmin is fail-closed (false while /me loads or on failure),
+  // so admin sections appear only once identity is confirmed.
+  const sections = visibleSections(isAdmin);
 
   // Sync document metadata with the active language.
   useEffect(() => {
@@ -182,13 +176,10 @@ export function AppShell() {
             </span>
           </div>
 
-          {/* 2. Role switcher (admin-only; renders nothing for a plain user) */}
-          <RoleSwitcher />
-
-          {/* 3. Profile Card */}
+          {/* 2. Profile Card */}
           <UserStrip />
 
-          {/* 4. Branding Sign-off (sits tight at the absolute bottom with leading-tight and centered) */}
+          {/* 3. Branding Sign-off (sits tight at the absolute bottom with leading-tight and centered) */}
           <div className="px-1 text-[10px] text-muted-foreground/50 leading-tight text-center">
             {t("common:brand_tagline")}
           </div>