fix(ai): Copilot 审计修复 — C-1/H-1/H-2/H-3/H-4/H-5/L-2

- L-2: value_to_f64 对 Null 返回 NaN（防止误触发规则）
- C-1: load_patient_data 空数据时跳过写入快照
- H-1: 每日刷新定时器添加初始延迟
- H-2: copilot_consumer 传内层 content
- H-3: 前端 hooks/Alert 修复分页响应解析
- H-4: risk_handler 动态选择 AI provider
- H-5: 新增 DELETE /copilot/rules/{id} 软删除路由

crates/erp-ai/src/event/copilot_consumer.rs

@@ -81,6 +81,11 @@ async fn process_event(db: &sea_orm::DatabaseConnection, event: &erp_core::event
                 .as_str()
                 .unwrap_or("异常告警")
                 .to_string();
+            // 只传内层 content，避免重复存储顶层元数据
+            let content = insight_data
+                .get("content")
+                .cloned()
+                .unwrap_or(insight_data.clone());
             let _ = crate::service::insight_service::InsightService::create_insight(
                 db,
                 tenant_id,
@@ -89,7 +94,7 @@ async fn process_event(db: &sea_orm::DatabaseConnection, event: &erp_core::event
                 "rule".into(),
                 Some(severity),
                 title,
-                insight_data,
+                content,
                 None,
                 168, // 7 天过期
                 None,