Restrict AI features to administrators only for improved control

Update routes and sidebar to enforce admin-only access for AI features, including model retrieval, text generation, and history viewing.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/G1P4XGr

client/src/App.tsx

@@ -69,7 +69,7 @@ function Router() {
       <Route path="/calendar">{() => <ProtectedRoute component={Calendar} />}</Route>
       <Route path="/media">{() => <ProtectedRoute component={Media} />}</Route>
       <Route path="/pages">{() => <ProtectedRoute component={PagesManagement} />}</Route>
-      <Route path="/ai">{() => <ProtectedRoute component={AI} />}</Route>
+      <Route path="/ai">{() => <ProtectedRoute component={AI} adminOnly />}</Route>
       <Route path="/history">{() => <ProtectedRoute component={History} />}</Route>
       <Route path="/settings">{() => <ProtectedRoute component={Settings} adminOnly />}</Route>
       <Route path="/sql">{() => <ProtectedRoute component={SqlAdmin} adminOnly />}</Route>

client/src/components/sidebar.tsx

@@ -63,7 +63,6 @@ export default function Sidebar({ onLinkClick }: SidebarProps = {}) {
     { icon: PlusCircle, label: "Nouvelle publication", href: "/new", badge: null },
     { icon: Calendar, label: "Calendrier", href: "/calendar", badge: null },
     { icon: Images, label: "Médiathèque", href: "/media", badge: null },
-    { icon: Bot, label: "Assistant IA", href: "/ai", badge: null },
   ];
 
   const statsItems = [
@@ -212,6 +211,30 @@ export default function Sidebar({ onLinkClick }: SidebarProps = {}) {
                 </div>
               )}
             </a>
+            <a
+              href="/ai"
+              onClick={(e) => handleLinkClick("/ai", e)}
+              className={`
+                flex items-center gap-3 px-4 py-3 rounded-xl transition-all relative group cursor-pointer
+                ${location === "/ai"
+                  ? 'bg-gradient-to-r from-primary/10 to-secondary/10 text-primary shadow-sm' 
+                  : 'text-muted-foreground hover:bg-sidebar-accent hover:text-foreground'
+                }
+                ${isCollapsed ? 'justify-center' : ''}
+              `}
+              data-testid="link-assistant-ia"
+            >
+              {location === "/ai" && (
+                <div className="absolute left-0 top-1/2 -translate-y-1/2 w-1 h-8 gradient-primary rounded-r-full" />
+              )}
+              <Bot className="w-5 h-5" />
+              {!isCollapsed && <span>Assistant IA</span>}
+              {isCollapsed && (
+                <div className="absolute left-full ml-2 px-3 py-2 bg-popover text-popover-foreground text-sm rounded-lg shadow-lg opacity-0 invisible group-hover:opacity-100 group-hover:visible transition-all whitespace-nowrap z-50">
+                  Assistant IA
+                </div>
+              )}
+            </a>
             <a
               href="/users"
               onClick={(e) => handleLinkClick("/users", e)}