chore: 编译器警告清理 — 22 条全部消除，workspace 零警告

erp-ai(8): 移除未用 import + serde 结构体 #[allow(dead_code)]
erp-plugin(5): 移除未用 import + FromQueryResult 结构体允许
erp-health(8): 移除未用 import/变量 + FromQueryResult 字段允许
erp-server(1): AnalyticsEvent.timestamp 允许（未来分析集成）

crates/erp-health/src/event.rs

@@ -325,15 +325,7 @@ pub fn register_handlers_with_state(state: crate::state::HealthState) {
                                 .and_then(|s| uuid::Uuid::parse_str(s).ok());
 
                             if let Some(patient_id) = patient_id {
-                                // 通过 raw SQL 查找关联的 AI 建议（action_result 中包含 followup_task_id）
-                                let sql = r#"
-                                    SELECT id FROM ai_suggestion
-                                    WHERE tenant_id = $1
-                                      AND deleted_at IS NULL
-                                      AND status = 'executed'
-                                      AND action_result @> $2
-                                    LIMIT 1
-                                "#;
+                                // 通过 ai_suggestion_loader 查找关联的 AI 建议
                                 if let Some(suggestion_id) = crate::service::ai_suggestion_loader::find_by_followup_task(
                                     &fu_db, event.tenant_id, task_id,
                                 ).await.unwrap_or(None) {

crates/erp-health/src/service/action_inbox_service.rs

@@ -105,6 +105,7 @@ struct ActionItemRow {
     patient_id: Uuid,
     patient_name: String,
     result_content: Option<String>,
+    #[allow(dead_code)] // FromQueryResult 映射需要，当前 DTO 转换中未读取
     source_id: Option<Uuid>,
 }
 
@@ -116,6 +117,7 @@ struct CountRow {
 #[derive(Debug, FromQueryResult)]
 struct ActionDetail {
     id: Uuid,
+    #[allow(dead_code)] // FromQueryResult 映射需要，当前 DTO 转换中未读取
     action_type: String,
     priority_raw: String,
     status: String,
@@ -124,6 +126,7 @@ struct ActionDetail {
     reanalysis_id: Option<Uuid>,
     created_at: DateTime<Utc>,
     updated_at: DateTime<Utc>,
+    #[allow(dead_code)] // FromQueryResult 映射需要，当前 DTO 转换中未读取
     source_id: Option<Uuid>,
     patient_id: Uuid,
     patient_name: String,

crates/erp-health/src/service/medication_reminder_service.rs

@@ -1,5 +1,4 @@
 use chrono::Utc;
-use sea_orm::entity::prelude::*;
 use sea_orm::{ActiveModelTrait, ActiveValue::Set, ColumnTrait, EntityTrait, PaginatorTrait, QueryFilter, QueryOrder, QuerySelect};
 use uuid::Uuid;
 

crates/erp-health/src/service/stats_service.rs

@@ -1,4 +1,4 @@
-use sea_orm::{ColumnTrait, ConnectionTrait, EntityTrait, PaginatorTrait, QueryFilter, sea_query::Expr, FromQueryResult, Statement};
+use sea_orm::{ColumnTrait, ConnectionTrait, EntityTrait, PaginatorTrait, QueryFilter, sea_query::Expr, FromQueryResult};
 
 use erp_core::error::AppResult;
 
@@ -7,7 +7,6 @@ use crate::entity::{
     patient, consultation_session, follow_up_task,
     points_transaction, lab_report,
     appointment, vital_signs, patient_doctor_relation, doctor_profile,
-    article,
 };
 use crate::state::HealthState;
 
@@ -463,6 +462,7 @@ async fn compute_daily_report_rate(
     struct DailyRow {
         date: String,
         reported: i64,
+        #[allow(dead_code)] // FromQueryResult 映射需要 total 字段，当前未读取
         total: i64,
     }
 
@@ -902,7 +902,7 @@ pub async fn get_points_recent_activity(
 
 /// 模块状态
 pub async fn get_module_status(
-    state: &HealthState,
+    _state: &HealthState,
 ) -> AppResult<Vec<ModuleStatusResp>> {
     let modules = vec![
         ModuleStatusResp {