feat: initialize Nuanji (Warm Notes) project

- Base platform from base.git (ERP base: auth, core, config, message, workflow, plugin)
- Created erp-diary module skeleton (lib.rs, dto.rs, error.rs, event.rs, state.rs)
- Integrated erp-diary into workspace and erp-server
- Added DiaryModule registration in main.rs
- Added DiaryState FromRef in state.rs
- Diary routes mounted (empty routes, ready for implementation)
- Product design spec v1.2 preserved in docs/
- Implementation plan preserved in plans/

Cargo check: OK
Cargo test: OK (78+ base tests passing)

crates/erp-plugin/src/notification.rs

@@ -0,0 +1,109 @@
+use chrono::Utc;
+use sea_orm::{ConnectionTrait, FromQueryResult, Statement};
+use uuid::Uuid;
+
+use erp_core::error::AppResult;
+use erp_core::events::{DomainEvent, EventBus};
+
+/// 启动插件通知监听器 — 订阅 plugin.trigger.* 事件
+pub fn start_notification_listener(db: sea_orm::DatabaseConnection, event_bus: EventBus) {
+    let (mut rx, _handle) = event_bus.subscribe_filtered("plugin.trigger.".to_string());
+
+    tokio::spawn(async move {
+        while let Some(event) = rx.recv().await {
+            if let Err(e) = handle_trigger_event(&event, &db).await {
+                tracing::warn!(
+                    event_type = %event.event_type,
+                    error = %e,
+                    "Failed to handle plugin trigger notification"
+                );
+            }
+        }
+        tracing::info!("Plugin notification listener stopped");
+    });
+}
+
+async fn handle_trigger_event(
+    event: &DomainEvent,
+    db: &sea_orm::DatabaseConnection,
+) -> AppResult<()> {
+    let plugin_id = event
+        .payload
+        .get("plugin_id")
+        .and_then(|v| v.as_str())
+        .unwrap_or("unknown");
+    let trigger_name = event
+        .payload
+        .get("trigger_name")
+        .and_then(|v| v.as_str())
+        .unwrap_or("unknown");
+    let entity = event
+        .payload
+        .get("entity")
+        .and_then(|v| v.as_str())
+        .unwrap_or("unknown");
+    let action = event
+        .payload
+        .get("action")
+        .and_then(|v| v.as_str())
+        .unwrap_or("unknown");
+
+    let title = format!("插件事件: {}.{}", plugin_id, trigger_name);
+    let body = format!(
+        "插件 [{}] 的实体 [{}] 触发了 [{}] 事件",
+        plugin_id, entity, action
+    );
+
+    // 查询所有管理员用户
+    #[derive(FromQueryResult)]
+    struct AdminUser {
+        id: Uuid,
+    }
+
+    let admins = AdminUser::find_by_statement(Statement::from_sql_and_values(
+        sea_orm::DatabaseBackend::Postgres,
+        r#"SELECT u.id FROM users u
+           JOIN user_roles ur ON ur.user_id = u.id
+           JOIN roles r ON r.id = ur.role_id
+           WHERE u.tenant_id = $1 AND r.name = 'admin' AND u.deleted_at IS NULL"#,
+        [event.tenant_id.into()],
+    ))
+    .all(db)
+    .await
+    .map_err(|e| erp_core::error::AppError::Internal(e.to_string()))?;
+
+    // 为每个管理员插入消息记录
+    let now = Utc::now();
+    for admin in &admins {
+        let msg_id = Uuid::now_v7();
+        let sql = r#"
+            INSERT INTO messages (id, tenant_id, sender_type, recipient_id, recipient_type,
+                                  title, body, priority, is_read, created_at, updated_at, version)
+            VALUES ($1, $2, 'system', $3, 'user', $4, $5, 'normal', false, $6, $7, 1)
+        "#;
+        db.execute(Statement::from_sql_and_values(
+            sea_orm::DatabaseBackend::Postgres,
+            sql,
+            [
+                msg_id.into(),
+                event.tenant_id.into(),
+                admin.id.into(),
+                title.clone().into(),
+                body.clone().into(),
+                now.into(),
+                now.into(),
+            ],
+        ))
+        .await
+        .map_err(|e| erp_core::error::AppError::Internal(e.to_string()))?;
+    }
+
+    tracing::info!(
+        plugin_id = %plugin_id,
+        trigger = %trigger_name,
+        admin_count = admins.len(),
+        "Plugin trigger notification sent"
+    );
+
+    Ok(())
+}