further dict wrapper update

web_interface_v2.py

@@ -94,6 +94,28 @@ class DictWrapper:
         # Support .get() method
         return getattr(self, key, default)
     
+    def __str__(self):
+        # Return empty string for missing values to avoid template errors
+        if hasattr(self, '_value'):
+            return str(self._value) if self._value is not None else ''
+        return ''
+    
+    def __repr__(self):
+        # Return empty string for missing values
+        if hasattr(self, '_value'):
+            return repr(self._value) if self._value is not None else ''
+        return ''
+    
+    def __html__(self):
+        # Support for MarkupSafe HTML escaping
+        return str(self)
+    
+    def __bool__(self):
+        # Return False for empty wrappers
+        if hasattr(self, '_value'):
+            return bool(self._value)
+        return False
+
 class DisplayMonitor:
     def __init__(self):
         self.running = False