feat: restore source parity and harden agent runtime

backend-fastapi/online_dev/report_manager/engine/parameter_resolver.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""预览参数解析（对标 JNPF parameterData 子集）"""
+from __future__ import annotations
+
+from datetime import date, datetime
+from typing import Any, Dict, Optional
+
+
+def _today_str() -> str:
+    return date.today().isoformat()
+
+
+def _now_str() -> str:
+    return datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+
+
+def build_system_params(
+    *,
+    user_id: Optional[str] = None,
+    user_name: Optional[str] = None,
+    dept_id: Optional[str] = None,
+    dept_name: Optional[str] = None,
+    tenant_id: Optional[str] = None,
+) -> Dict[str, Any]:
+    """系统变量，与 JNPF parameterData 常用键对齐。"""
+    params: Dict[str, Any] = {
+        "currentDate": _today_str(),
+        "currentTime": _now_str(),
+        "currentUserId": user_id or "",
+        "currentUserName": user_name or "",
+        "currentDeptId": dept_id or "",
+        "currentDeptName": dept_name or "",
+        "currentTenantId": tenant_id or "",
+    }
+    # 兼容 #{userName} / #{deptName} 简写
+    if user_name:
+        params.setdefault("userName", user_name)
+    if dept_name:
+        params.setdefault("deptName", dept_name)
+    return params
+
+
+def merge_preview_params(
+    query_defaults: Optional[Dict[str, Any]] = None,
+    request_params: Optional[Dict[str, Any]] = None,
+    system_params: Optional[Dict[str, Any]] = None,
+) -> Dict[str, Any]:
+    """合并顺序：query 默认 → 系统变量 → 请求参数（请求优先）。"""
+    merged: Dict[str, Any] = {}
+    for src in (query_defaults or {}, system_params or {}, request_params or {}):
+        for k, v in src.items():
+            if v is not None and v != "":
+                merged[k] = v
+    return merged