added npc images to API and frontend

api/app/models/npc.py

@@ -296,6 +296,7 @@ class NPC:
     location_id: str
     personality: NPCPersonality
     appearance: NPCAppearance
+    image_url: Optional[str] = None
     knowledge: Optional[NPCKnowledge] = None
     relationships: List[NPCRelationship] = field(default_factory=list)
     inventory_for_sale: List[NPCInventoryItem] = field(default_factory=list)
@@ -316,6 +317,7 @@ class NPC:
             "name": self.name,
             "role": self.role,
             "location_id": self.location_id,
+            "image_url": self.image_url,
             "personality": self.personality.to_dict(),
             "appearance": self.appearance.to_dict(),
             "knowledge": self.knowledge.to_dict() if self.knowledge else None,
@@ -400,6 +402,7 @@ class NPC:
             name=data["name"],
             role=data["role"],
             location_id=data["location_id"],
+            image_url=data.get("image_url"),
             personality=personality,
             appearance=appearance,
             knowledge=knowledge,