fix(api): improve NexusAttachment field parsing for weapon amplifiers

- Updated from_api() to check multiple possible field names
- Added fallback checks for Damage, Range, Decay, Efficiency fields
- Type detection from both API Type field and item name
- Improved display formatting in attachment selector

core/nexus_full_api.py

@@ -159,16 +159,67 @@ class NexusAttachment(NexusItem):
         """Create from API response."""
         props = data.get('Properties', {})
         
+        # Debug: Log available properties
+        logger.debug(f"Attachment {data.get('Name')} properties: {props.keys()}")
+        
+        # Try multiple possible field names for each stat
+        # Damage bonus might be in Damage, DamageBonus, or DamageIncrease
+        damage_bonus = Decimal("0")
+        for key in ['Damage', 'DamageBonus', 'DamageIncrease', 'dmg', 'damage']:
+            if key in props and props[key] is not None:
+                damage_bonus = safe_decimal(props[key])
+                break
+        
+        # Range bonus
+        range_bonus = Decimal("0")
+        for key in ['Range', 'RangeBonus', 'RangeIncrease', 'range']:
+            if key in props and props[key] is not None:
+                range_bonus = safe_decimal(props[key])
+                break
+        
+        # Decay - check in Economy dict or top-level
+        decay = Decimal("0")
+        if 'Economy' in props and isinstance(props['Economy'], dict):
+            decay = safe_decimal(props['Economy'].get('Decay'))
+        for key in ['Decay', 'decay', 'Cost']:
+            if key in props and props[key] is not None:
+                decay = safe_decimal(props[key])
+                break
+        
+        # Efficiency
+        efficiency_bonus = Decimal("0")
+        if 'Economy' in props and isinstance(props['Economy'], dict):
+            efficiency_bonus = safe_decimal(props['Economy'].get('Efficiency'))
+        for key in ['Efficiency', 'efficiency', 'Eco', 'Eff']:
+            if key in props and props[key] is not None:
+                efficiency_bonus = safe_decimal(props[key])
+                break
+        
+        # Determine attachment type from API type or name
+        api_type = props.get('Type', '').lower()
+        name = data.get('Name', '').lower()
+        
+        if 'amplifier' in api_type or 'amp' in name:
+            attachment_type = 'amplifier'
+        elif 'scope' in api_type or 'scope' in name:
+            attachment_type = 'scope'
+        elif 'sight' in api_type or 'sight' in name:
+            attachment_type = 'sight'
+        elif 'absorber' in api_type or 'absorber' in name:
+            attachment_type = 'absorber'
+        else:
+            attachment_type = api_type or 'unknown'
+
         return cls(
             id=data.get('Id', 0),
             name=data.get('Name', 'Unknown'),
             item_id=str(data.get('Id', 0)),
             category='attachment',
-            attachment_type=props.get('Type', ''),
-            damage_bonus=Decimal(str(props.get('DamageBonus', 0))),
-            range_bonus=Decimal(str(props.get('RangeBonus', 0))),
-            decay=Decimal(str(props.get('Decay', 0))),
-            efficiency_bonus=Decimal(str(props.get('Efficiency', 0))),
+            attachment_type=attachment_type,
+            damage_bonus=damage_bonus,
+            range_bonus=range_bonus,
+            decay=decay,
+            efficiency_bonus=efficiency_bonus,
         )
 
 

ui/attachment_selector.py

@@ -232,14 +232,28 @@ class AttachmentSelectorDialog(QDialog):
             item = QTreeWidgetItem()
             item.setText(0, att.name)
             item.setText(1, att.attachment_type.title())
-            item.setText(2, f"+{att.damage_bonus}")
-            item.setText(3, f"+{att.range_bonus}")
-            item.setText(4, f"{att.decay:.2f}")
-            item.setText(5, f"{att.efficiency_bonus:.1f}%")
+            
+            # Format damage with + sign if positive
+            dmg_text = f"+{att.damage_bonus}" if att.damage_bonus > 0 else str(att.damage_bonus)
+            item.setText(2, dmg_text)
+            
+            # Format range with + sign if positive  
+            rng_text = f"+{att.range_bonus}" if att.range_bonus > 0 else str(att.range_bonus)
+            item.setText(3, rng_text)
+            
+            # Format decay (typically in PEC)
+            item.setText(4, f"{att.decay:.4f}")
+            
+            # Format efficiency as percentage
+            eff_text = f"{att.efficiency_bonus:.2f}%" if att.efficiency_bonus > 0 else "-"
+            item.setText(5, eff_text)
             
             # Color code by type
             if att.attachment_type == "amplifier":
                 item.setForeground(0, QColor("#ff9800"))  # Orange
+                # Highlight positive damage values
+                if att.damage_bonus > 0:
+                    item.setForeground(2, QColor("#7FFF7F"))
             elif att.attachment_type == "scope":
                 item.setForeground(0, QColor("#2196f3"))  # Blue
             elif att.attachment_type == "sight":
@@ -250,6 +264,9 @@ class AttachmentSelectorDialog(QDialog):
             item.setData(0, Qt.ItemDataRole.UserRole, att)
             tree.addTopLevelItem(item)
             
+            item.setData(0, Qt.ItemDataRole.UserRole, att)
+            tree.addTopLevelItem(item)
+    
     def _on_search_changed(self, tab: dict, text: str):
         """Handle search text change in a tab."""
         tree = tab["tree"]