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.rs

@@ -23,7 +23,7 @@ use module_puzzle::{PuzzleGeneratedImageCandidate, PuzzleRuntimeLevelStatus};
 use platform_llm::{LlmMessage, LlmMessageContentPart, LlmTextRequest};
 use platform_oss::{LegacyAssetPrefix, OssSignedGetObjectUrlRequest};
 use platform_oss::{OssHeadObjectRequest, OssObjectAccess, OssPutObjectRequest};
-use serde_json::{Map, Value, json};
+use serde_json::{Value, json};
 use shared_contracts::{
     creation_audio::CreationAudioAsset,
     puzzle_agent::{
@@ -58,7 +58,7 @@ use spacetime_client::{
     PuzzleAgentSuggestedActionRecord, PuzzleAnchorItemRecord, PuzzleAnchorPackRecord,
     PuzzleAudioAssetRecord, PuzzleCreatorIntentRecord, PuzzleDraftCompileFailureRecordInput,
     PuzzleDraftLevelRecord, PuzzleFormDraftRecord, PuzzleFormDraftSaveRecordInput,
-    PuzzleGalleryCardRecord, PuzzleGeneratedImageCandidateRecord,
+    PuzzleGeneratedImageCandidateRecord,
     PuzzleGeneratedImagesSaveRecordInput, PuzzleLeaderboardEntryRecord,
     PuzzleLeaderboardSubmitRecordInput, PuzzlePublishRecordInput, PuzzleRecommendedNextWorkRecord,
     PuzzleResultDraftRecord, PuzzleResultPreviewBlockerRecord, PuzzleResultPreviewFindingRecord,