feat: 新增AI创作中心场景，支持改写/续写/创作

client/js/data/StoryManager.js

@@ -144,4 +144,38 @@ export default class StoryManager {
       return null;
     }
   }
+
+  /**
+   * AI续写故事
+   */
+  async continueStory(storyId, prompt) {
+    try {
+      const result = await post(`/stories/${storyId}/continue`, {
+        current_node_key: this.currentNodeKey,
+        prompt: prompt
+      });
+      return result;
+    } catch (error) {
+      console.error('AI续写失败:', error);
+      return null;
+    }
+  }
+
+  /**
+   * AI创作新故事
+   */
+  async createStory(params) {
+    try {
+      const result = await post('/stories/ai-create', {
+        genre: params.genre,
+        keywords: params.keywords,
+        protagonist: params.protagonist,
+        conflict: params.conflict
+      });
+      return result;
+    } catch (error) {
+      console.error('AI创作失败:', error);
+      return null;
+    }
+  }
 }