Fix: enforce display:flex on login-screen and app-screen to prevent layout breaking on logout/login

public/index.php

@@ -118,6 +118,20 @@ $currentUser = Auth::getUsername();
             border-color: #6366f1 !important;
             box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.4) !important;
         }
+
+        /* 5. Layout flex garanti pour les écrans login et dashboard */
+        #login-screen:not(.hidden) {
+            display: flex !important;
+        }
+        #login-screen.hidden {
+            display: none !important;
+        }
+        #app-screen:not(.hidden) {
+            display: flex !important;
+        }
+        #app-screen.hidden {
+            display: none !important;
+        }
     </style>
 </head>
 <body class="min-h-screen w-full bg-anthracite-900 text-slate-100 antialiased selection:bg-indigo-500 selection:text-white">