Puzzle: support history images & partial generation

Allow history-generated image paths to be submitted where Data URLs were previously required and avoid treating partial/result-page generations as blocking the whole draft. Backend: resolve history /generated-* references via resolve_puzzle_reference_image_as_data_url and convert to PuzzleDownloadedImage; add PuzzleDownloadedImage::from_resolved_reference_image; extend draft handling to apply generated level metadata (auto-naming) and normalize generation_status to treat levels with images as ready. API: add shouldAutoNameLevel to action contracts and use it to request/refine generated level names. Spacetime/module and mappers: normalize completed level statuses when saving/reading so result-page background or per-level generation doesn't mask completed drafts. Frontend: expose resolver helpers, only mark a work as generating when no usable cover or ready level exists, keep level controls enabled during UI-background regeneration, and add tests covering history-image submission, auto-naming, and UI-background/partial-generation behaviors.

src/components/custom-world-home/CustomWorldCreationHub.test.tsx

@@ -221,6 +221,81 @@ test('creation hub marks generating and newly completed drafts', () => {
   expect(html).toContain('creation-work-card__spinner');
 });
 
+test('creation hub does not mask completed puzzle drafts while a later level image is generating', () => {
+  const html = renderToStaticMarkup(
+    <CustomWorldCreationHub
+      items={[]}
+      puzzleItems={[
+        {
+          workId: 'puzzle-work-session-1',
+          profileId: 'puzzle-profile-session-1',
+          ownerUserId: 'user-1',
+          authorDisplayName: '测试作者',
+          workTitle: '潮雾拼图草稿',
+          workDescription: '已经有可查看的首关结果。',
+          levelName: '潮雾拼图',
+          summary: '已经有可查看的首关结果。',
+          themeTags: ['潮雾'],
+          coverImageSrc: '/generated-puzzle-assets/session/cover.png',
+          publicationStatus: 'draft',
+          updatedAt: new Date('2026-04-22T10:00:00.000Z').toISOString(),
+          publishedAt: null,
+          publishReady: false,
+          sourceSessionId: 'puzzle-session-1',
+          generationStatus: 'generating',
+          levels: [
+            {
+              levelId: 'puzzle-level-1',
+              levelName: '潮雾拼图',
+              pictureDescription: '潮雾港口。',
+              pictureReference: null,
+              candidates: [
+                {
+                  candidateId: 'candidate-1',
+                  imageSrc: '/generated-puzzle-assets/session/cover.png',
+                  assetId: 'asset-1',
+                  prompt: '潮雾港口',
+                  actualPrompt: null,
+                  sourceType: 'generated',
+                  selected: true,
+                },
+              ],
+              selectedCandidateId: 'candidate-1',
+              coverImageSrc: '/generated-puzzle-assets/session/cover.png',
+              coverAssetId: 'asset-1',
+              generationStatus: 'ready',
+            },
+            {
+              levelId: 'puzzle-level-2',
+              levelName: '灯塔',
+              pictureDescription: '灯塔新关卡。',
+              pictureReference: null,
+              candidates: [],
+              selectedCandidateId: null,
+              coverImageSrc: null,
+              coverAssetId: null,
+              generationStatus: 'generating',
+            },
+          ],
+        },
+      ]}
+      loading={false}
+      error={null}
+      onRetry={() => {}}
+      onCreateType={noopCreateType}
+      onOpenDraft={() => {}}
+      onEnterPublished={() => {}}
+      entryConfig={testEntryConfig}
+      creationTypes={testCreationTypes}
+      onOpenPuzzleDetail={() => {}}
+    />,
+  );
+
+  expect(html).not.toContain('生成中...');
+  expect(html).not.toContain('creation-work-card__spinner');
+  expect(html).toContain('继续创作《潮雾拼图草稿》');
+});
+
 test('creation hub published work uses unified list card layout', () => {
   const html = renderToStaticMarkup(
     <CustomWorldCreationHub