拼图候选图改为增加而非替换

server-rs/crates/spacetime-module/src/puzzle.rs

@@ -684,7 +684,7 @@ fn save_puzzle_generated_images_tx(
     if candidates.is_empty() {
         return Err("拼图候选图不能为空".to_string());
     }
-    draft.candidates = candidates;
+    append_generated_candidates(&mut draft, candidates);
     draft.generation_status = "ready".to_string();
     if let Some(selected) = draft
         .candidates
@@ -1507,6 +1507,23 @@ fn increment_puzzle_profile_play_count(
     );
 }
 
+fn append_generated_candidates(
+    draft: &mut PuzzleResultDraft,
+    candidates: Vec<PuzzleGeneratedImageCandidate>,
+) {
+    let has_selected_candidate = draft.candidates.iter().any(|entry| entry.selected);
+    // 再次生成图片是扩充候选池，不覆盖创作者已经看到或已经选择的候选图。
+    // 若已有正式选择，新追加候选图保持未选中，避免同一草稿出现多个 selected。
+    draft
+        .candidates
+        .extend(candidates.into_iter().map(|mut candidate| {
+            if has_selected_candidate {
+                candidate.selected = false;
+            }
+            candidate
+        }));
+}
+
 fn list_published_puzzle_profiles(ctx: &TxContext) -> Result<Vec<PuzzleWorkProfile>, String> {
     ctx.db
         .puzzle_work_profile()
@@ -1613,6 +1630,40 @@ mod tests {
         assert!(preview.publish_ready);
     }
 
+    #[test]
+    fn puzzle_generated_images_are_appended_without_clearing_existing_candidates() {
+        let anchor_pack = infer_anchor_pack("蒸汽城市雨夜猫咪", Some("蒸汽城市雨夜猫咪"));
+        let mut draft = compile_result_draft(&anchor_pack, &[]);
+        draft.candidates = vec![PuzzleGeneratedImageCandidate {
+            candidate_id: "session-1-candidate-1".to_string(),
+            image_src: "/generated-puzzle-assets/session-1/old/cover.png".to_string(),
+            asset_id: "asset-old".to_string(),
+            prompt: "旧提示词".to_string(),
+            actual_prompt: Some("旧提示词".to_string()),
+            source_type: "generated".to_string(),
+            selected: true,
+        }];
+
+        append_generated_candidates(
+            &mut draft,
+            vec![PuzzleGeneratedImageCandidate {
+                candidate_id: "session-1-candidate-2".to_string(),
+                image_src: "/generated-puzzle-assets/session-1/new/cover.png".to_string(),
+                asset_id: "asset-new".to_string(),
+                prompt: "新提示词".to_string(),
+                actual_prompt: Some("新提示词".to_string()),
+                source_type: "generated".to_string(),
+                selected: true,
+            }],
+        );
+
+        assert_eq!(draft.candidates.len(), 2);
+        assert_eq!(draft.candidates[0].candidate_id, "session-1-candidate-1");
+        assert!(draft.candidates[0].selected);
+        assert_eq!(draft.candidates[1].candidate_id, "session-1-candidate-2");
+        assert!(!draft.candidates[1].selected);
+    }
+
     #[test]
     fn puzzle_recommendation_score_prefers_same_author_weight() {
         let left = PuzzleWorkProfile {