fix: add safe decimal conversion to armor_system from_dict methods

- ProtectionProfile.from_dict now handles int/float/Decimal/string values
- ArmorPlate.from_dict uses safe_decimal for block_chance
- ArmorPiece.from_dict uses safe_decimal for decay_per_hp and weight
- Prevents 'Decimal + str' type errors when loading saved loadouts

core/armor_system.py

@@ -117,18 +117,27 @@ class ProtectionProfile:
         }
 
     @classmethod
-    def from_dict(cls, data: Dict[str, str]) -> "ProtectionProfile":
-        """Create from dictionary."""
+    def from_dict(cls, data: Dict[str, Any]) -> "ProtectionProfile":
+        """Create from dictionary with validation."""
+        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(
-            stab=Decimal(data.get('stab', '0')),
-            cut=Decimal(data.get('cut', '0')),
-            impact=Decimal(data.get('impact', '0')),
-            penetration=Decimal(data.get('penetration', '0')),
-            shrapnel=Decimal(data.get('shrapnel', '0')),
-            burn=Decimal(data.get('burn', '0')),
-            cold=Decimal(data.get('cold', '0')),
-            acid=Decimal(data.get('acid', '0')),
-            electric=Decimal(data.get('electric', '0')),
+            stab=safe_decimal(data.get('stab', '0')),
+            cut=safe_decimal(data.get('cut', '0')),
+            impact=safe_decimal(data.get('impact', '0')),
+            penetration=safe_decimal(data.get('penetration', '0')),
+            shrapnel=safe_decimal(data.get('shrapnel', '0')),
+            burn=safe_decimal(data.get('burn', '0')),
+            cold=safe_decimal(data.get('cold', '0')),
+            acid=safe_decimal(data.get('acid', '0')),
+            electric=safe_decimal(data.get('electric', '0')),
         )
 
 
@@ -202,13 +211,22 @@ class ArmorPlate:
 
     @classmethod
     def from_dict(cls, data: Dict) -> "ArmorPlate":
-        """Create from dictionary."""
+        """Create from dictionary with validation."""
+        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'],
             protection=ProtectionProfile.from_dict(data.get('protection', {})),
             durability=data.get('durability', 2000),
-            block_chance=Decimal(data.get('block_chance', '0')),
+            block_chance=safe_decimal(data.get('block_chance', '0')),
         )
 
 
@@ -328,7 +346,16 @@ class ArmorPiece:
 
     @classmethod
     def from_dict(cls, data: Dict) -> "ArmorPiece":
-        """Create from dictionary."""
+        """Create from dictionary with validation."""
+        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')
+        
         piece = cls(
             name=data['name'],
             item_id=data['item_id'],
@@ -336,7 +363,8 @@ class ArmorPiece:
             set_name=data.get('set_name'),
             protection=ProtectionProfile.from_dict(data.get('protection', {})),
             durability=data.get('durability', 2000),
-            weight=Decimal(data.get('weight', '1.0')),
+            decay_per_hp=safe_decimal(data.get('decay_per_hp', '0.05')),
+            weight=safe_decimal(data.get('weight', '1.0')),
         )
         if data.get('attached_plate'):
             piece.attached_plate = ArmorPlate.from_dict(data['attached_plate'])