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/puzzle/draft.rs

@@ -977,6 +977,7 @@ pub(crate) fn attach_selected_puzzle_candidate_to_levels(
     }
 }
 
+#[cfg(test)]
 pub(crate) fn resolve_puzzle_initial_ui_background_prompt(
     draft: &PuzzleResultDraftRecord,
     target_level: &PuzzleDraftLevelRecord,
@@ -1042,6 +1043,7 @@ pub(crate) fn build_puzzle_ui_background_generation_prompt(
     )
 }
 
+#[cfg(test)]
 pub(crate) fn attach_puzzle_level_ui_background(
     levels: &mut [PuzzleDraftLevelRecord],
     level_id: &str,
@@ -1083,27 +1085,6 @@ pub(crate) fn attach_puzzle_level_asset_bundle(
     level.ui_background_image_object_key = Some(generated.level_background.object_key);
 }
 
-pub(crate) async fn generate_puzzle_initial_ui_background_required(
-    state: &PuzzleApiState,
-    request_context: &RequestContext,
-    owner_user_id: &str,
-    session_id: &str,
-    draft: &PuzzleResultDraftRecord,
-    target_level: &PuzzleDraftLevelRecord,
-) -> Result<(String, GeneratedPuzzleUiBackgroundResponse), AppError> {
-    let prompt = resolve_puzzle_initial_ui_background_prompt(draft, target_level);
-    let generated = generate_puzzle_ui_background_image(
-        state,
-        request_context,
-        owner_user_id,
-        session_id,
-        target_level.level_name.as_str(),
-        prompt.as_str(),
-    )
-    .await?;
-    Ok((prompt, generated))
-}
-
 pub(crate) async fn generate_puzzle_level_asset_bundle_required(
     state: &PuzzleApiState,
     request_context: &RequestContext,