fix(jump-hop): preserve themed runtime metadata

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

@@ -283,7 +283,10 @@ pub async fn start_jump_hop_run(
 ) -> Result<Json<Value>, Response> {
     let Json(payload) = jump_hop_json(payload, &request_context, JUMP_HOP_RUNTIME_PROVIDER)?;
     ensure_non_empty(&request_context, &payload.profile_id, "profileId")?;
-    let is_draft_runtime = payload.runtime_mode.as_deref() == Some("draft");
+    let is_draft_runtime = payload
+        .runtime_mode
+        .as_deref()
+        .is_some_and(is_jump_hop_draft_runtime_mode);
     let owner_user_id = principal.subject().to_string();
     let principal_kind = principal.kind().as_str();
     let run = state
@@ -1240,6 +1243,10 @@ fn build_jump_hop_work_play_tracking_draft(
     WorkPlayTrackingDraft::runtime_principal("jump-hop", work_id, principal, source_route)
 }
 
+fn is_jump_hop_draft_runtime_mode(runtime_mode: &str) -> bool {
+    runtime_mode.trim().eq_ignore_ascii_case("draft")
+}
+
 fn build_jump_hop_draft(payload: &JumpHopWorkspaceCreateRequest) -> JumpHopDraftResponse {
     let theme_text = normalize_theme_text(&payload.theme_text, &payload.work_title);
     JumpHopDraftResponse {
@@ -1422,6 +1429,14 @@ fn current_utc_micros() -> i64 {
 mod tests {
     use super::*;
 
+    #[test]
+    fn jump_hop_draft_runtime_mode_detection_matches_client_normalization() {
+        assert!(is_jump_hop_draft_runtime_mode("draft"));
+        assert!(is_jump_hop_draft_runtime_mode(" DRAFT "));
+        assert!(!is_jump_hop_draft_runtime_mode("published"));
+        assert!(!is_jump_hop_draft_runtime_mode(""));
+    }
+
     #[test]
     fn jump_hop_tile_atlas_prompt_uses_dedicated_five_by_five_floor_layout() {
         let prompt = build_jump_hop_tile_atlas_prompt("森林冒险", "森林主题清爽游戏化立体感平台");

src/services/jump-hop/jumpHopClient.test.ts

@@ -37,3 +37,93 @@ test('jump hop creation keeps image2 generation requests alive long enough', asy
     }),
   );
 });
+
+test('jump hop work detail preserves flattened back button asset', async () => {
+  const backButtonAsset = {
+    assetId: 'back-button-1',
+    imageSrc: '/generated-jump-hop-assets/back-button-1.png',
+    imageObjectKey: 'jump-hop/back-button-1.png',
+    assetObjectId: 'asset-object-back-button-1',
+    generationProvider: 'image2',
+    prompt: '主题返回按钮',
+    width: 1024,
+    height: 1024,
+  };
+  const characterAsset = {
+    assetId: 'character-1',
+    imageSrc: 'builtin://jump-hop/default-character',
+    imageObjectKey: '',
+    assetObjectId: 'character-object-1',
+    generationProvider: 'builtin-three',
+    prompt: '内置默认角色',
+    width: 0,
+    height: 0,
+  };
+  const draft = {
+    templateId: 'jump-hop',
+    templateName: '跳一跳',
+    profileId: 'profile-1',
+    themeText: '森林茶馆',
+    workTitle: '森林茶馆跳一跳',
+    workDescription: '森林茶馆主题',
+    themeTags: ['森林茶馆', '跳一跳'],
+    difficulty: 'standard',
+    stylePreset: 'minimal-blocks',
+    defaultCharacter: null,
+    characterPrompt: '内置默认角色',
+    tilePrompt: '森林茶馆主题地块',
+    endMoodPrompt: null,
+    characterAsset,
+    tileAtlasAsset: characterAsset,
+    tileAssets: [],
+    path: {
+      seed: 'profile-1',
+      difficulty: 'standard',
+      platforms: [],
+      scoring: {
+        perfectRadiusRatio: 0.24,
+        hitRadiusRatio: 0.52,
+        maxChargeMs: 1200,
+        minChargeMs: 80,
+        maxJumpDistance: 5,
+      },
+    },
+    coverComposite: null,
+    backButtonAsset: null,
+    generationStatus: 'ready',
+  };
+  requestJsonMock.mockResolvedValue({
+    item: {
+      runtimeKind: 'jump-hop',
+      workId: 'work-1',
+      profileId: 'profile-1',
+      ownerUserId: 'owner-1',
+      sourceSessionId: 'session-1',
+      themeText: '森林茶馆',
+      workTitle: '森林茶馆跳一跳',
+      workDescription: '森林茶馆主题',
+      themeTags: ['森林茶馆', '跳一跳'],
+      difficulty: 'standard',
+      stylePreset: 'minimal-blocks',
+      coverImageSrc: null,
+      publicationStatus: 'published',
+      playCount: 0,
+      updatedAt: '2026-06-05T00:00:00Z',
+      publishedAt: '2026-06-05T00:00:00Z',
+      publishReady: true,
+      generationStatus: 'ready',
+      draft,
+      path: draft.path,
+      defaultCharacter: null,
+      characterAsset,
+      tileAtlasAsset: characterAsset,
+      tileAssets: [],
+      backButtonAsset,
+    },
+  });
+
+  const { jumpHopClient } = await import('./jumpHopClient');
+  const response = await jumpHopClient.getWorkDetail('profile-1');
+
+  expect(response.item.backButtonAsset).toEqual(backButtonAsset);
+});

src/services/jump-hop/jumpHopClient.ts

@@ -136,6 +136,8 @@ function normalizeJumpHopWorkProfile(
     characterAsset: flattened.characterAsset,
     tileAtlasAsset: flattened.tileAtlasAsset,
     tileAssets: flattened.tileAssets,
+    backButtonAsset:
+      flattened.backButtonAsset ?? flattened.draft?.backButtonAsset ?? null,
   };
 }