Enhance module navigation: update inventory and library navbar logic for improved module access and user session handling

Web/app.py

@@ -406,6 +406,9 @@ def _is_inventory_module_path(path):
     if not path:
         return False
         
+    if path == '/' or path == '/home':
+        return True
+
     inventory_prefixes = (
         '/scanner',
         '/inventory',
@@ -431,11 +434,25 @@ def _enforce_module_access():
 
 def _get_current_module(path):
     """Resolve the active UI module for navbar separation."""
+    # Check if referer indicates we came from library
+    referrer = request.referrer or ''
+    
     if cfg.LIBRARY_MODULE_ENABLED and _is_library_module_path(path):
+        session['last_module'] = 'library'
         return 'library'
     if cfg.INVENTORY_MODULE_ENABLED and _is_inventory_module_path(path):
+        session['last_module'] = 'inventory'
+        return 'inventory'
+        
+    last_module = session.get('last_module')
+    if last_module == 'library' and cfg.LIBRARY_MODULE_ENABLED:
+        return 'library'
+    if last_module == 'inventory' and cfg.INVENTORY_MODULE_ENABLED:
+        return 'inventory'
+        
+    # Default fallback: prefer inventory if enabled, otherwise library, else inventory
+    if cfg.INVENTORY_MODULE_ENABLED:
         return 'inventory'
-    # Default fallback:
     return 'library' if cfg.LIBRARY_MODULE_ENABLED else 'inventory'
 
 

Web/templates/base.html

@@ -1032,6 +1032,7 @@
         </div>
     </div>
     {% endif %}
+        {% if 'username' in session %}
     {% if CURRENT_MODULE != 'library' and inventory_module_enabled %}
         <nav class="navbar navbar-expand-lg navbar-dark" id="inventoryNavbar">
             <div class="container-fluid">
@@ -1263,6 +1264,19 @@
             </div>
         </nav>
         {% endif %}
+
+    {% else %}
+    <nav class="navbar navbar-expand-lg navbar-dark" id="loginNavbar">
+        <div class="container-fluid">
+            <a class="navbar-brand" href="{{ url_for('home') }}" data-icon="🔹">Invario</a>
+            <ul class="navbar-nav ms-auto mb-2 mb-lg-0">
+                <li class="nav-item">
+                    <a class="nav-link" href="{{ url_for('impressum') }}">Impressum</a>
+                </li>
+            </ul>
+        </div>
+    </nav>
+    {% endif %}
     <div class="container">
         {% with messages = get_flashed_messages(with_categories=true) %}
             {% if messages %}