feat: 初始化项目结构并添加核心功能模块

- 新增文档模板和导航结构
- 实现服务器基础API路由和控制器
- 添加扩展插件配置和前端框架
- 引入多租户和权限管理模块
- 集成日志和数据库配置
- 添加核心业务模型和类型定义

server/src/services/CompetitorService.ts

@@ -0,0 +1,88 @@
+import db from '../config/database';
+import { logger } from '../utils/logger';
+
+export interface CompetitorProduct {
+  platform: string;
+  productId: string;
+  price: number;
+  sales: number;
+  url: string;
+  imageFingerprint: string;
+}
+
+/**
+ * CompetitorService: 全球同行嗅探器核心逻辑 (BIZ_EXT_09)
+ * 负责跨平台同款识别、价格监听与销量回测
+ */
+export class CompetitorService {
+  /**
+   * 基于图像指纹识别跨平台同款
+   */
+  static async findCrossPlatformMatches(imageFingerprint: string): Promise<CompetitorProduct[]> {
+    try {
+      // 模拟跨平台搜索逻辑
+      // 实际生产环境应通过向量数据库 (如 Milvus/Pinecone) 检索相似图像指纹
+      const matches = await db('cf_product_competitor')
+        .where({ imageFingerprint })
+        .select('*');
+      
+      return matches;
+    } catch (error: any) {
+      logger.error(`[CompetitorSniffer] Search failed: ${error.message}`);
+      return [];
+    }
+  }
+
+  /**
+   * 监听同行改价行为并触发告警
+   */
+  static async trackPriceChanges(productId: string, currentPrice: number) {
+    try {
+      const history = await db('cf_competitor_price_history')
+        .where({ productId })
+        .orderBy('created_at', 'desc')
+        .first();
+
+      if (history && history.price !== currentPrice) {
+        logger.info(`[CompetitorSniffer] Price change detected for ${productId}: ${history.price} -> ${currentPrice}`);
+        // 触发 Profit Guard 自动调价逻辑 (BIZ_EXT_06)
+        // EventBus.emit('COMPETITOR_PRICE_CHANGED', { productId, newPrice: currentPrice });
+      }
+
+      await db('cf_competitor_price_history').insert({
+        productId,
+        price: currentPrice,
+        created_at: new Date()
+      });
+    } catch (error: any) {
+      logger.error(`[CompetitorSniffer] Price tracking failed: ${error.message}`);
+    }
+  }
+
+  /**
+   * 同行销量趋势回测 (爆品生命周期分析)
+   */
+  static async analyzeSalesTrend(productId: string): Promise<any> {
+    try {
+      const salesData = await db('cf_competitor_sales_history')
+        .where({ productId })
+        .orderBy('created_at', 'asc');
+      
+      // 简单的增长率计算
+      if (salesData.length < 2) return { status: 'STABLE', growth: 0 };
+
+      const first = salesData[0].sales;
+      const last = salesData[salesData.length - 1].sales;
+      const growth = ((last - first) / first) * 100;
+
+      return {
+        status: growth > 20 ? 'TRENDING' : 'STABLE',
+        growthRate: growth.toFixed(2) + '%',
+        points: salesData.length
+      };
+    } catch (error: any) {
+      logger.error(`[CompetitorSniffer] Sales analysis failed: ${error.message}`);
+      return null;
+    }
+  }
+}