Admin: replace top tabs with sidebar menu (RTL on right)

Task #9 — the admin page used a horizontal Tabs bar across the top.
User wanted an OS-style admin shell with a vertical side menu that
sits on the right in Arabic and on the left in English.

Changes (artifacts/teaboy-os/src/pages/admin.tsx):
- Removed the Tabs/TabsList/TabsTrigger/TabsContent layout
- Added local section state ("dashboard" | "apps" | "services" |
  "users" | "settings"), defaulting to dashboard
- Desktop (>=md): vertical sidebar (240px wide) with icon + label
  for each section, glass-style highlighted active item. Sidebar is
  the first DOM child of the flex row, so under dir="rtl" it
  naturally appears on the right; under dir="ltr" on the left.
- Mobile (<md): sidebar hidden; hamburger button added in the header
  opens a Sheet drawer (right side in RTL, left in LTR) with the
  same nav items. Selecting an item closes the drawer.
- Added a placeholder Dashboard panel ("Dashboard widgets coming
  soon.") so the new default section has content.
- Added bilingual locale keys: admin.nav.{dashboard,apps,services,
  users,settings,menu} and admin.dashboardSoon in en.json/ar.json.
- All existing CRUD (apps/services/users) and Site Settings panel
  preserved untouched inside their new section blocks.

Verified: pnpm --filter @workspace/teaboy-os run typecheck passes.

artifacts/teaboy-os/src/locales/ar.json

@@ -96,7 +96,16 @@
     "siteNameAr": "اسم الموقع (عربي)",
     "siteNameEn": "اسم الموقع (إنجليزي)",
     "registrationOpen": "السماح بإنشاء حسابات",
-    "registrationOpenHint": "عند الإيقاف، الأدمن فقط يقدر ينشئ مستخدمين جدد."
+    "registrationOpenHint": "عند الإيقاف، الأدمن فقط يقدر ينشئ مستخدمين جدد.",
+    "nav": {
+      "dashboard": "الرئيسية",
+      "apps": "التطبيقات",
+      "services": "الخدمات",
+      "users": "المستخدمين",
+      "settings": "الإعدادات",
+      "menu": "القائمة"
+    },
+    "dashboardSoon": "إحصائيات اللوحة قريباً."
   },
   "notFound": {
     "title": "404 — الصفحة غير موجودة",

artifacts/teaboy-os/src/locales/en.json

@@ -96,7 +96,16 @@
     "siteNameAr": "Site Name (Arabic)",
     "siteNameEn": "Site Name (English)",
     "registrationOpen": "Allow public registration",
-    "registrationOpenHint": "When off, only admins can create new users."
+    "registrationOpenHint": "When off, only admins can create new users.",
+    "nav": {
+      "dashboard": "Dashboard",
+      "apps": "Apps",
+      "services": "Services",
+      "users": "Users",
+      "settings": "Settings",
+      "menu": "Menu"
+    },
+    "dashboardSoon": "Dashboard widgets coming soon."
   },
   "notFound": {
     "title": "404 — Page Not Found",

artifacts/teaboy-os/src/pages/admin.tsx

@@ -24,13 +24,16 @@ import {
 import { useQueryClient } from "@tanstack/react-query";
 import { useAuth } from "@/contexts/AuthContext";
 import { useUpload, type UploadResponse } from "@workspace/object-storage-web";
-import { ArrowRight, ArrowLeft, Settings, Plus, Pencil, Trash2, Shield, Upload, Loader2 } from "lucide-react";
+import { ArrowRight, ArrowLeft, Settings, Plus, Pencil, Trash2, Shield, Upload, Loader2, LayoutDashboard, Grid2X2, Coffee, Users as UsersIcon, Menu as MenuIcon } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { Switch } from "@/components/ui/switch";
-import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
+import { Sheet, SheetContent, SheetTrigger } from "@/components/ui/sheet";
 import { useToast } from "@/hooks/use-toast";
+import { cn } from "@/lib/utils";
+
+type AdminSection = "dashboard" | "apps" | "services" | "users" | "settings";
 
 type AppForm = {
   nameAr: string;
@@ -87,6 +90,42 @@ export default function AdminPage() {
   const [editingApp, setEditingApp] = useState<{ id?: number; form: AppForm } | null>(null);
   const [editingService, setEditingService] = useState<{ id?: number; form: ServiceForm } | null>(null);
   const [newUserForm, setNewUserForm] = useState<{ username: string; email: string; password: string } | null>(null);
+  const [section, setSection] = useState<AdminSection>("dashboard");
+  const [mobileNavOpen, setMobileNavOpen] = useState(false);
+
+  const navItems: { key: AdminSection; label: string; Icon: typeof LayoutDashboard }[] = [
+    { key: "dashboard", label: t("admin.nav.dashboard"), Icon: LayoutDashboard },
+    { key: "apps", label: t("admin.nav.apps"), Icon: Grid2X2 },
+    { key: "services", label: t("admin.nav.services"), Icon: Coffee },
+    { key: "users", label: t("admin.nav.users"), Icon: UsersIcon },
+    { key: "settings", label: t("admin.nav.settings"), Icon: Settings },
+  ];
+
+  const renderNavList = (onSelect?: () => void) => (
+    <nav className="flex flex-col gap-1">
+      {navItems.map(({ key, label, Icon }) => {
+        const active = section === key;
+        return (
+          <button
+            key={key}
+            onClick={() => {
+              setSection(key);
+              onSelect?.();
+            }}
+            className={cn(
+              "flex items-center gap-3 w-full px-3 py-2.5 rounded-xl text-sm transition-colors text-start",
+              active
+                ? "bg-primary/15 text-primary font-medium shadow-sm"
+                : "text-muted-foreground hover:bg-slate-100 hover:text-foreground",
+            )}
+          >
+            <Icon size={18} className="shrink-0" />
+            <span className="truncate">{label}</span>
+          </button>
+        );
+      })}
+    </nav>
+  );
 
   const emptyAppForm: AppForm = { nameAr: "", nameEn: "", slug: "", iconName: "Grid2X2", route: "/", color: "#6366f1", sortOrder: 0 };
   const emptyServiceForm: ServiceForm = { nameAr: "", nameEn: "", descriptionAr: "", descriptionEn: "", price: "0.00", imageUrl: "", isAvailable: true };
@@ -171,10 +210,27 @@ export default function AdminPage() {
         >
           <BackIcon size={20} />
         </button>
-        <div className="flex items-center gap-2">
-          <Settings size={20} className="text-red-400" />
-          <h1 className="text-lg font-semibold text-foreground">{t("admin.title")}</h1>
+        <div className="flex items-center gap-2 flex-1 min-w-0">
+          <Settings size={20} className="text-red-400 shrink-0" />
+          <h1 className="text-lg font-semibold text-foreground truncate">{t("admin.title")}</h1>
         </div>
+        <Sheet open={mobileNavOpen} onOpenChange={setMobileNavOpen}>
+          <SheetTrigger asChild>
+            <button
+              className="md:hidden p-2 rounded-xl hover:bg-slate-100 text-muted-foreground hover:text-foreground transition-colors"
+              aria-label={t("admin.nav.menu")}
+            >
+              <MenuIcon size={20} />
+            </button>
+          </SheetTrigger>
+          <SheetContent side={isRtl ? "right" : "left"} className="w-72 p-4">
+            <div className="flex items-center gap-2 mb-4 mt-2">
+              <Settings size={18} className="text-red-400" />
+              <h2 className="font-semibold text-foreground">{t("admin.title")}</h2>
+            </div>
+            {renderNavList(() => setMobileNavOpen(false))}
+          </SheetContent>
+        </Sheet>
       </div>
 
       {/* Edit App Modal */}
@@ -303,17 +359,24 @@ export default function AdminPage() {
         </div>
       )}
 
-      <div className="flex-1 p-4 pb-8">
-        <Tabs defaultValue="apps">
-          <TabsList className="glass-panel w-full mb-4">
-            <TabsTrigger value="apps" className="flex-1">{t("admin.manageApps")}</TabsTrigger>
-            <TabsTrigger value="services" className="flex-1">{t("admin.manageServices")}</TabsTrigger>
-            <TabsTrigger value="users" className="flex-1">{t("admin.manageUsers")}</TabsTrigger>
-            <TabsTrigger value="settings" className="flex-1">{t("admin.siteSettings")}</TabsTrigger>
-          </TabsList>
+      <div className="flex-1 flex w-full">
+        {/* Sidebar (desktop) */}
+        <aside className="hidden md:block w-60 shrink-0 border-e border-slate-200/70 bg-white/40 backdrop-blur-sm p-3">
+          <div className="sticky top-20">
+            {renderNavList()}
+          </div>
+        </aside>
 
-          {/* Apps Tab */}
-          <TabsContent value="apps" className="space-y-3">
+        {/* Main content */}
+        <div className="flex-1 min-w-0 p-4 pb-8">
+          {section === "dashboard" && (
+            <div className="glass-panel rounded-2xl p-8 text-center text-muted-foreground">
+              {t("admin.dashboardSoon")}
+            </div>
+          )}
+
+          {section === "apps" && (
+          <div className="space-y-3">
             <div className="flex justify-end">
               <Button size="sm" onClick={() => setEditingApp({ form: emptyAppForm })}>
                 <Plus size={14} className="me-1" />
@@ -377,10 +440,11 @@ export default function AdminPage() {
                 </div>
               </div>
             ))}
-          </TabsContent>
+          </div>
+          )}
 
-          {/* Services Tab */}
-          <TabsContent value="services" className="space-y-3">
+          {section === "services" && (
+          <div className="space-y-3">
             <div className="flex justify-end">
               <Button size="sm" onClick={() => setEditingService({ form: emptyServiceForm })}>
                 <Plus size={14} className="me-1" />
@@ -438,10 +502,11 @@ export default function AdminPage() {
                 </div>
               </div>
             ))}
-          </TabsContent>
+          </div>
+          )}
 
-          {/* Users Tab */}
-          <TabsContent value="users" className="space-y-3">
+          {section === "users" && (
+          <div className="space-y-3">
             <Button
               size="sm"
               className="w-full"
@@ -491,12 +556,15 @@ export default function AdminPage() {
                 </div>
               </div>
             ))}
-          </TabsContent>
+          </div>
+          )}
 
-          <TabsContent value="settings" className="space-y-3">
-            <SiteSettingsPanel />
-          </TabsContent>
-        </Tabs>
+          {section === "settings" && (
+            <div className="space-y-3">
+              <SiteSettingsPanel />
+            </div>
+          )}
+        </div>
       </div>
     </div>
   );