fix: 修复外部因素数据源 - 北向资金改为南向资金，修复P0-P7全部外部因素

- P0资金面：DB数据过期时用麦蕊API获取资金流向
- P1市场情绪：去掉turnover字段依赖（DB无此字段）
- P2南向资金：北向实时数据已停公布，改用南向资金(港股通)替代
- P3美股：用腾讯财经API替代失效的AKShare接口
- P4大宗商品：用腾讯财经API替代，修复var_name解析
- P7汇率：用新浪财经API替代失效的AKShare接口
- 修复评分详情API技术得分硬编码问题
- 前端传入tech_score参数确保明细与列表分数一致

stock-html/static/js/app.js

@@ -2121,6 +2121,13 @@
                             recommend_rate: scanItem.recommend_rate,
                             has_scan_data: true,
                             scan_triggered_count: scanCount,
+                            final_score: scanItem.final_score,
+                            technical_score: scanItem.technical_score,
+                            external_score: scanItem.external_score,
+                            verdict: scanItem.verdict,
+                            score_factors: null,
+                            score_summary: '',
+                            score_detail_loading: true,
                             realtime_loading: true,
                             realtime_signal_status: null,
                             realtime_triggered_count: null,
@@ -2158,6 +2165,24 @@
                                 this.techSignalResult.realtime_error = err.message || '获取失败';
                             }
                         }
+                        // 异步请求评分详情（外部因素），传入列表技术得分确保一致
+                        try {
+                            const techScore = scanItem.final_score ? Math.round(scanItem.final_score - (scanItem.external_score || 0)) : 50;
+                            const scoreResp = await axios.get(`/api/stock_score_detail/${code}?tech_score=${techScore}`);
+                            if (scoreResp.data.success && this.techSignalResult && this.techSignalResult.stock_code === code) {
+                                this.techSignalResult.score_factors = scoreResp.data.factors || null;
+                                this.techSignalResult.score_summary = scoreResp.data.summary || '';
+                                this.techSignalResult.final_score = scoreResp.data.final_score;
+                                this.techSignalResult.technical_score = scoreResp.data.technical_score;
+                                this.techSignalResult.external_score = scoreResp.data.external_score;
+                                this.techSignalResult.verdict = scoreResp.data.verdict;
+                            }
+                        } catch (e) {
+                            console.debug('评分详情获取失败:', e);
+                        }
+                        if (this.techSignalResult && this.techSignalResult.stock_code === code) {
+                            this.techSignalResult.score_detail_loading = false;
+                        }
                         return;
                     }
                     try {