refactor(diary): Phase 3 质量提升 — 201 状态码 + OpenAPI 文档 + DiaryEvent 类型安全

前端:
- fix(app): Isar native 文件直接导入 isar_database_native.dart，消除 5 个条件导出类型错误
- chore(app): build_runner 重新生成 .g.dart 文件 (102 outputs)
- fix(app): 移除 secure_token_store_factory 未使用的 kIsWeb import

后端:
- refactor(diary): 所有创建端点 POST 返回 201 Created (9 handler, 11 端点)
- feat(diary): DiaryApiDoc OpenApi derive — 42 路径 + 32 Schema 汇总到 Swagger
- feat(diary): DiaryEvent 枚举添加 event_type/payload/to_domain_event 方法 + 4 测试

测试: 84/84 erp-diary 通过, 509/509 全仓库通过, Flutter analyze 0 error

crates/erp-diary/src/handler/parent_handler.rs

@@ -1,6 +1,7 @@
 // 家长中心 API 处理器 — PIPL 合规: 绑定/查阅/导出/删除
 
 use axum::extract::{Extension, FromRef, Path, Query, State};
+use axum::http::StatusCode;
 use axum::response::Json;
 use serde::{Deserialize, Serialize};
 use utoipa::{IntoParams, ToSchema};
@@ -71,7 +72,7 @@ pub struct DeleteResultResp {
     path = "/api/v1/diary/parent/bind",
     request_body = BindChildReq,
     responses(
-        (status = 200, description = "绑定成功", body = ApiResponse<BindingResp>),
+        (status = 201, description = "绑定成功", body = ApiResponse<BindingResp>),
         (status = 400, description = "已绑定该孩子"),
         (status = 401, description = "未授权"),
         (status = 403, description = "权限不足"),
@@ -86,7 +87,7 @@ pub async fn bind_child<S>(
     State(state): State<DiaryState>,
     Extension(ctx): Extension<TenantContext>,
     Json(req): Json<BindChildReq>,
-) -> Result<Json<ApiResponse<BindingResp>>, AppError>
+) -> Result<(StatusCode, Json<ApiResponse<BindingResp>>), AppError>
 where
     DiaryState: FromRef<S>,
     S: Clone + Send + Sync + 'static,
@@ -102,11 +103,11 @@ where
     )
     .await?;
 
-    Ok(Json(ApiResponse::ok(BindingResp {
+    Ok((StatusCode::CREATED, Json(ApiResponse::ok(BindingResp {
         binding_id: binding.id,
         child_id: binding.child_id,
         verified_at: binding.verified_at,
-    })))
+    }))))
 }
 
 #[utoipa::path(
@@ -357,7 +358,7 @@ where
     path = "/api/v1/diary/parent/bindings/{binding_id}/confirm",
     params(("binding_id" = Uuid, Path, description = "绑定请求ID")),
     responses(
-        (status = 200, description = "确认成功", body = ApiResponse<BindingResp>),
+        (status = 201, description = "确认成功", body = ApiResponse<BindingResp>),
         (status = 401, description = "未授权"),
         (status = 403, description = "无权确认此绑定"),
         (status = 404, description = "绑定请求不存在"),
@@ -372,7 +373,7 @@ pub async fn confirm_binding<S>(
     State(state): State<DiaryState>,
     Extension(ctx): Extension<TenantContext>,
     Path(binding_id): Path<Uuid>,
-) -> Result<Json<ApiResponse<BindingResp>>, AppError>
+) -> Result<(StatusCode, Json<ApiResponse<BindingResp>>), AppError>
 where
     DiaryState: FromRef<S>,
     S: Clone + Send + Sync + 'static,
@@ -386,11 +387,11 @@ where
     )
     .await?;
 
-    Ok(Json(ApiResponse::ok(BindingResp {
+    Ok((StatusCode::CREATED, Json(ApiResponse::ok(BindingResp {
         binding_id: binding.id,
         child_id: binding.parent_id,
         verified_at: binding.verified_at,
-    })))
+    }))))
 }
 
 #[utoipa::path(