feat: 新增风险图谱算法与系统仪表盘及操作反馈体系

后端新增风险图谱算法模块、风险观察与反馈服务、规则 DSL
校验器和可解释性引擎，完善系统仪表盘和财务仪表盘统计，
优化 agent 运行和编排执行链路，清理旧开发文档，前端新增
系统趋势、负载热力图等多种仪表盘图表组件，完善操作反馈
对话框和工作台日期选择器，优化报销创建和审批详情交互，
补充单元测试覆盖。

server/src/app/services/user_agent_application_dates.py

@@ -0,0 +1,128 @@
+from __future__ import annotations
+
+import re
+from datetime import UTC, date, datetime, timedelta
+from typing import Any
+
+
+def expand_application_time_with_days(
+    time_text: str,
+    days_text: str,
+    *,
+    context_json: dict[str, Any] | None = None,
+) -> str:
+    normalized_time = str(time_text or "").strip()
+    days = resolve_application_days_count(days_text)
+    if not days:
+        return normalized_time
+
+    if normalized_time and re.search(r"\s*(?:至|到|~|-{2,}|—)\s*", normalized_time):
+        return normalized_time
+
+    parsed_start = _resolve_start_date(normalized_time, context_json or {})
+    if parsed_start is None:
+        return normalized_time
+
+    end_date = parsed_start + timedelta(days=max(days - 1, 0))
+    start_text = f"{parsed_start:%Y-%m-%d}"
+    end_text = f"{end_date:%Y-%m-%d}"
+    return start_text if start_text == end_text else f"{start_text} 至 {end_text}"
+
+
+def resolve_application_days_count(days_text: str) -> int:
+    text = str(days_text or "").strip()
+    if not text:
+        return 0
+    digit_match = re.search(r"\d+", text)
+    if digit_match:
+        return max(0, int(digit_match.group(0)))
+
+    chinese_match = re.search(r"[一二两三四五六七八九十]{1,3}", text)
+    if not chinese_match:
+        return 0
+    return _parse_chinese_number(chinese_match.group(0))
+
+
+def _resolve_start_date(time_text: str, context_json: dict[str, Any]) -> date | None:
+    if time_text:
+        match = re.search(
+            r"(?P<date>20\d{2}[-/.年]\d{1,2}[-/.月]\d{1,2}日?)",
+            time_text,
+        )
+        if match:
+            return _parse_application_date(match.group("date"))
+        return None
+    return _resolve_client_today(context_json)
+
+
+def _resolve_client_today(context_json: dict[str, Any]) -> date:
+    raw_now = str(context_json.get("client_now_iso") or "").strip()
+    parsed_now = _parse_client_now(raw_now)
+    if parsed_now is None:
+        return datetime.now(UTC).date()
+
+    offset_minutes = _parse_timezone_offset_minutes(
+        context_json.get("client_timezone_offset_minutes"),
+    )
+    if offset_minutes is not None:
+        parsed_now = parsed_now - timedelta(minutes=offset_minutes)
+    return parsed_now.date()
+
+
+def _parse_client_now(value: str) -> datetime | None:
+    if not value:
+        return None
+    normalized = value.replace("Z", "+00:00")
+    try:
+        parsed = datetime.fromisoformat(normalized)
+    except ValueError:
+        return None
+    if parsed.tzinfo is None:
+        parsed = parsed.replace(tzinfo=UTC)
+    return parsed.astimezone(UTC)
+
+
+def _parse_timezone_offset_minutes(value: Any) -> int | None:
+    try:
+        return int(value)
+    except (TypeError, ValueError):
+        return None
+
+
+def _parse_chinese_number(value: str) -> int:
+    digits = {
+        "一": 1,
+        "二": 2,
+        "两": 2,
+        "三": 3,
+        "四": 4,
+        "五": 5,
+        "六": 6,
+        "七": 7,
+        "八": 8,
+        "九": 9,
+    }
+    text = str(value or "").strip()
+    if not text:
+        return 0
+    if text == "十":
+        return 10
+    if "十" in text:
+        left, _, right = text.partition("十")
+        tens = digits.get(left, 1) if left else 1
+        ones = digits.get(right, 0) if right else 0
+        return tens * 10 + ones
+    return digits.get(text, 0)
+
+
+def _parse_application_date(value: str) -> date | None:
+    normalized = str(value or "").strip().rstrip("日").replace("年", "-").replace("月", "-")
+    normalized = normalized.replace("/", "-").replace(".", "-")
+    parts = [part for part in normalized.split("-") if part]
+    if len(parts) != 3:
+        return None
+    try:
+        year, month, day = (int(part) for part in parts)
+        return date(year, month, day)
+    except ValueError:
+        return None