feat(app): add evaluation history, bot control panel, simulation visualizer, and vendored signalr_core

FinlyticApp/lib/features/auth/views/login_screen.dart

@@ -16,6 +16,7 @@ class _LoginScreenState extends State<LoginScreen> {
   final _formKey = GlobalKey<FormState>();
   final _emailController = TextEditingController();
   final _passwordController = TextEditingController();
+  bool _obscurePassword = true;
 
   @override
   void dispose() {
@@ -75,8 +76,15 @@ class _LoginScreenState extends State<LoginScreen> {
                   const SizedBox(height: 16),
                   TextFormField(
                     controller: _passwordController,
-                    obscureText: true,
-                    decoration: const InputDecoration(labelText: 'Passwort', prefixIcon: Icon(Icons.lock_outline)),
+                    obscureText: _obscurePassword,
+                    decoration: InputDecoration(
+                      labelText: 'Passwort',
+                      prefixIcon: const Icon(Icons.lock_outline),
+                      suffixIcon: IconButton(
+                        icon: Icon(_obscurePassword ? Icons.visibility_outlined : Icons.visibility_off_outlined),
+                        onPressed: () => setState(() => _obscurePassword = !_obscurePassword),
+                      ),
+                    ),
                     validator: (v) => v == null || v.isEmpty ? 'Passwort erforderlich' : null,
                   ),
                   const SizedBox(height: 32),
@@ -100,6 +108,12 @@ class _LoginScreenState extends State<LoginScreen> {
                       );
                     },
                   ),
+                  const SizedBox(height: 16),
+                  Text(
+                    "Konten werden ausschließlich vom Administrator angelegt.",
+                    textAlign: TextAlign.center,
+                    style: TextStyle(color: AppTheme.textMuted, fontSize: 11),
+                  ),
                 ],
               ),
             ),