fix: add safe decimal conversion to AttachmentConfig.from_dict and better error logging

- AttachmentConfig.from_dict now uses safe_decimal() for all decimal fields
- Added traceback logging to _load_saved_loadouts to see exact error location
- Handles int/float/Decimal/string values for all numeric fields

ui/loadout_manager.py

@@ -75,15 +75,25 @@ class AttachmentConfig:
 
     @classmethod
     def from_dict(cls, data: dict) -> "AttachmentConfig":
+        """Create from dictionary with safe decimal conversion."""
+        def safe_decimal(val):
+            if isinstance(val, Decimal):
+                return val
+            if isinstance(val, (int, float)):
+                return Decimal(str(val))
+            if isinstance(val, str):
+                return Decimal(val) if val else Decimal('0')
+            return Decimal('0')
+        
         return cls(
             name=data['name'],
             item_id=data['item_id'],
             attachment_type=data['attachment_type'],
-            decay_pec=Decimal(data['decay_pec']),
-            damage_bonus=Decimal(data.get('damage_bonus', '0')),
-            range_bonus=Decimal(data.get('range_bonus', '0')),
-            efficiency_bonus=Decimal(data.get('efficiency_bonus', '0')),
-            protection_bonus={k: Decimal(v) for k, v in data.get('protection_bonus', {}).items()},
+            decay_pec=safe_decimal(data.get('decay_pec', '0')),
+            damage_bonus=safe_decimal(data.get('damage_bonus', '0')),
+            range_bonus=safe_decimal(data.get('range_bonus', '0')),
+            efficiency_bonus=safe_decimal(data.get('efficiency_bonus', '0')),
+            protection_bonus={k: safe_decimal(v) for k, v in data.get('protection_bonus', {}).items()},
         )
 
 
@@ -2371,7 +2381,9 @@ class LoadoutManagerDialog(QDialog):
                     item.setToolTip(tooltip)
                     self.saved_list.addItem(item)
                 except Exception as e:
+                    import traceback
                     logger.error(f"Failed to load {filepath}: {e}")
+                    logger.error(traceback.format_exc())
                     continue
         except Exception as e:
             logger.error(f"Failed to list loadouts: {e}")