清理后端编译警告

删除后端未使用的历史 helper、mapper、handler 和 re-export

将仅测试使用的导入、常量和辅助函数收口到 cfg(test)

补齐 Jump Hop 测试构造体字段并对齐 Match3D 当前素材表测试契约

验证后端 workspace cargo check 与 Match3D、Puzzle 相关测试

server-rs/crates/api-server/src/custom_world_ai.rs

@@ -10,9 +10,9 @@ use axum::{
     response::Response,
 };
 use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64_STANDARD};
-use image::{
-    DynamicImage, GenericImageView, ImageFormat, codecs::jpeg::JpegEncoder, imageops::FilterType,
-};
+use image::{DynamicImage, GenericImageView, codecs::jpeg::JpegEncoder, imageops::FilterType};
+#[cfg(test)]
+use image::ImageFormat;
 use module_assets::{
     AssetObjectAccessPolicy, AssetObjectFieldError, build_asset_entity_binding_input,
     build_asset_object_upsert_input, generate_asset_binding_id, generate_asset_object_id,