feat: 历史列表分类改为固定5标签（全部/中篇/短篇/长篇/收藏夹），移除状态筛选，后端保存length改为short

server/src/main/java/com/emotion/service/impl/EpicScriptDialogueServiceImpl.java

@@ -241,13 +241,17 @@ public class EpicScriptDialogueServiceImpl implements EpicScriptDialogueService
                 ? (String) metadata.get("title") : "我的人生剧本");
         script.setTheme(theme);
         script.setStyle("career");
-        script.setLength("medium");
+        script.setLength("short");
         script.setConversationId(conversationId);
-        script.setPlotIntro(fullText);
+        script.setPlotIntro("");
         script.setPlotTurning("");
         script.setPlotClimax("");
         script.setPlotEnding("");
-        script.setPlotJson(metadata != null ? metadata : new HashMap<>());
+        // 短篇小说全量文本保存到 plotJson.fullContent
+        // 前端 transformToFrontendFormat 通过 plotJson.fullContent 读取完整内容
+        Map<String, Object> plotJsonMap = metadata != null ? new HashMap<>(metadata) : new HashMap<>();
+        plotJsonMap.put("fullContent", fullText);
+        script.setPlotJson(plotJsonMap);
         script.setIsSelected(0);
         epicScriptService.save(script);