feat: guide — barre de recherche live + lien sidebar (BookOpen, bas)

frontend/src/components/Layout.tsx

@@ -1,6 +1,6 @@
 import { Link, useLocation } from 'react-router-dom';
 import { useAuth } from '../context/AuthContext';
-import { Swords, Package, Hammer, User, LogOut, Shield, Scroll, Trophy, ShoppingBag } from 'lucide-react';
+import { Swords, Package, Hammer, User, LogOut, Shield, Scroll, Trophy, ShoppingBag, BookOpen } from 'lucide-react';
 import { HudBar } from './HudBar';
 
 const NAV = [
@@ -83,6 +83,22 @@ export function Layout({ children }: { children: React.ReactNode }) {
               </Link>
             );
           })}
+          <div style={{ flex: 1 }} />
+          <Link to="/guide" title="Guide" style={{
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            width: 40,
+            height: 40,
+            borderRadius: 8,
+            color: loc.pathname === '/guide' ? '#f4c94e' : '#6b7a99',
+            background: loc.pathname === '/guide' ? '#1e2535' : 'transparent',
+            border: loc.pathname === '/guide' ? '1px solid #c49c2e' : '1px solid transparent',
+            textDecoration: 'none',
+            transition: 'all 0.15s',
+          }}>
+            <BookOpen size={18} />
+          </Link>
         </nav>
 
         {/* Main content */}