fix(agent): 修复规则中心表格版本和修改记录

补齐规则资产 JSON 读写接口和前端调用，修复 AuditView 导入缺失。

Excel 在线编辑改为比对所有页签并生成最近修改记录，版本快照统一保存到 rules/finance-rules/.versions。

隔离规则表测试存储，避免测试或旧入口写入真实规则目录与 storage/agent_assets。

server/src/app/schemas/agent_asset.py

@@ -93,6 +93,22 @@ class AgentAssetOnlyOfficeCallbackWrite(BaseModel):
     users: list[str] = Field(default_factory=list, description="当前编辑用户列表。")
 
 
+class AgentAssetRuleJsonWrite(BaseModel):
+    payload: dict[str, Any] = Field(default_factory=dict)
+
+
+class AgentAssetRuleJsonRead(BaseModel):
+    file_name: str
+    rule_code: str
+    name: str
+    description: str = ""
+    evaluator: str = ""
+    ontology_signal: str | None = None
+    inputs: dict[str, Any] = Field(default_factory=dict)
+    outcomes: dict[str, Any] = Field(default_factory=dict)
+    payload: dict[str, Any] = Field(default_factory=dict)
+
+
 class AgentAssetVersionTimelineItemRead(BaseModel):
     event_type: str
     version: str
@@ -129,8 +145,10 @@ class AgentAssetVersionCompareRead(BaseModel):
 
 
 class AgentAssetSpreadsheetChangeRecordRead(BaseModel):
+    id: str
     actor: str
     changed_at: datetime
+    version: str | None = None
     summary: str
     sheet_changes: list[AgentAssetSpreadsheetDiffSheetRead] = Field(default_factory=list)
     cell_changes: list[AgentAssetSpreadsheetDiffCellRead] = Field(default_factory=list)
@@ -172,6 +190,8 @@ class AgentAssetListItem(BaseModel):
     published_version: str | None
     working_version: str | None
     config_json: dict[str, Any]
+    change_count: int = 0
+    modified_by: str | None = None
     created_at: datetime
     updated_at: datetime