feat: 新增追问模式和iOS本地化，重构后端输出模型

backend/src/v1/agent/schemas.py

@@ -7,7 +7,7 @@ from uuid import UUID
 
 from pydantic import BaseModel, ConfigDict, Field
 
-from schemas.agent.runtime_models import ErrorInfo
+from schemas.agent.runtime_models import ErrorInfo, RunStatus, SignLevel
 from schemas.domain.chat_message import AgentChatMessage
 from schemas.domain.divination import DerivedDivinationData
 
@@ -220,8 +220,8 @@ class HistoryMessage(BaseModel):
 class HistoryAgentOutput(BaseModel):
     model_config = ConfigDict(extra="forbid")
 
-    status: Literal["success", "failed"] | None = None
-    sign_level: Literal["上上签", "中上签", "中下签", "下下签"] | None = None
+    status: RunStatus | None = None
+    sign_level: SignLevel | None = None
     conclusion: list[str] = Field(default_factory=list)
     focus_points: list[str] = Field(default_factory=list)
     advice: list[str] = Field(default_factory=list)