feat: add MMGame backend and frontend source code

backend/app/agents/npc.py

@@ -0,0 +1,26 @@
+from app.agents.ai import npc_generate
+
+
+class NPCAgent:
+    def __init__(self, role: dict, background: str, public_info: str):
+        self.role = role
+        self.background = background
+        self.public_info = public_info
+        self.memory = []
+
+    async def respond(self, phase_name: str, recent_messages: list = None, player_message: str = "", is_private: bool = False,
+                      known_clues: list[str] = None, phase_goal: str = "", all_roles: list[dict] = None) -> dict:
+        if recent_messages is None:
+            recent_messages = []
+        recent = [
+            f"{m.get('sender_name', m.get('sender', ''))}: {m.get('content', '')}"
+            for m in recent_messages[-5:]
+        ]
+        result = await npc_generate(self.role, self.background, phase_name, recent, player_message, is_private,
+                                    known_clues, phase_goal, all_roles)
+        if result:
+            content = result.get("content", "")
+            if content:
+                self.memory.append({"role": "assistant", "content": content})
+            return result
+        return {"content": f"{self.role['name']}陷入了沉思……", "action": "speak"}