feat: 添加作品/草稿/AI配额等后端API

server/models/user.js

@@ -128,6 +128,95 @@ const UserModel = {
     
     const [rows] = await pool.query(sql, params);
     return rows;
+  },
+
+  // 获取我的作品
+  async getMyWorks(userId) {
+    try {
+      const [rows] = await pool.query(
+        `SELECT id, title, description, category, cover_url, play_count, like_count, 
+                comment_count, status, created_at, updated_at,
+                COALESCE(earnings, 0) as earnings
+         FROM stories 
+         WHERE author_id = ? 
+         ORDER BY created_at DESC`,
+        [userId]
+      );
+      return rows;
+    } catch (e) {
+      // 表可能还没有author_id字段，返回空数组
+      return [];
+    }
+  },
+
+  // 获取草稿箱
+  async getDrafts(userId) {
+    try {
+      const [rows] = await pool.query(
+        `SELECT id, title, category, node_count, source, created_at, updated_at
+         FROM story_drafts 
+         WHERE user_id = ? 
+         ORDER BY updated_at DESC`,
+        [userId]
+      );
+      return rows;
+    } catch (e) {
+      // 表可能不存在，返回空数组
+      return [];
+    }
+  },
+
+  // 获取最近游玩
+  async getRecentPlayed(userId, limit = 10) {
+    const [rows] = await pool.query(
+      `SELECT s.id, s.title, s.category, s.description, s.cover_url, 
+              up.current_node_key, up.is_completed,
+              CASE WHEN up.is_completed THEN '已完成' ELSE '进行中' END as progress
+       FROM user_progress up
+       JOIN stories s ON up.story_id = s.id
+       WHERE up.user_id = ?
+       ORDER BY up.updated_at DESC
+       LIMIT ?`,
+      [userId, limit]
+    );
+    return rows;
+  },
+
+  // 获取AI创作历史
+  async getAIHistory(userId, limit = 20) {
+    try {
+      const [rows] = await pool.query(
+        `SELECT id, gen_type, input_prompt, output_content, status, created_at
+         FROM ai_generations 
+         WHERE user_id = ? 
+         ORDER BY created_at DESC 
+         LIMIT ?`,
+        [userId, limit]
+      );
+      return rows;
+    } catch (e) {
+      return [];
+    }
+  },
+
+  // 获取AI配额
+  async getAIQuota(userId) {
+    try {
+      const [rows] = await pool.query(
+        `SELECT daily_free_total as daily, daily_free_used as used, 
+                purchased_quota as purchased, gift_quota as gift
+         FROM user_ai_quota 
+         WHERE user_id = ?`,
+        [userId]
+      );
+      if (rows.length > 0) {
+        return rows[0];
+      }
+      // 没有记录则返回默认值
+      return { daily: 3, used: 0, purchased: 0, gift: 0 };
+    } catch (e) {
+      return { daily: 3, used: 0, purchased: 0, gift: 0 };
+    }
   }
 };