feat: restore source parity and harden agent runtime

backend-fastapi/online_dev/report_manager/constants.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""报表常量与默认值"""
+from typing import Any, Dict
+
+
+def default_snapshot() -> Dict[str, Any]:
+    return {
+        "id": "workbook",
+        "sheetOrder": ["sheet1"],
+        "sheets": {
+            "sheet1": {
+                "id": "sheet1",
+                "name": "Sheet1",
+                "cellData": {},
+                "rowCount": 100,
+                "columnCount": 26,
+            },
+        },
+    }
+
+
+def default_cells() -> Dict[str, Any]:
+    return {
+        "cells": [],
+        "floatEcharts": {},
+        "cellEcharts": {},
+        "floatImages": {},
+    }