fix(energy): 氢能站点名补全 tab_import_hydrogen_order，单价改为按量加权

站点名 fallback 链新增第三档：
  内部站表 → 外部站表 → tab_import_hydrogen_order(by bill_code) → 「未关联/未知 #ID」
经此关联，原来 140 条「未知站点」补全为 9 个真实站名（洛阳新红山、佛山新城等）

单价之前用 AVG(cost_price) 简单平均，混合价组会算出 34.0334... 这种
意外小数（看起来像被「重新计算」）。改为按量加权效率价：
  ROUND(SUM(cost_expense) / NULLIF(SUM(hydrogen_quantity), 0), 2)
单一价格组自动等于原价，混合价组得到真实付款单价。

Top5 与每日聚合两处 SQL 同步修改。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/server/routes/energy/index.ts

@@ -85,7 +85,9 @@ app.get('/hydrogen/overview', async (c) => {
   // Top5 加氢站（本年）
   const [top5Rows] = await pool.query<RowDataPacket[]>(
     `SELECT b.hydrogen_station_id AS id,
-            COALESCE(s.short_name, s.name, os.fixed_station_name, os.station_name,
+            COALESCE(MAX(s.short_name), MAX(s.name),
+                     MAX(os.fixed_station_name), MAX(os.station_name),
+                     MAX(i.hydrogen_station_name),
               CASE WHEN b.hydrogen_station_id IS NULL THEN '未关联站点'
                    ELSE CONCAT('未知站点 #', b.hydrogen_station_id) END) AS name,
             SUM(b.hydrogen_quantity) AS kg,
@@ -93,6 +95,7 @@ app.get('/hydrogen/overview', async (c) => {
      FROM tab_energy_hydrogen_bill b
      LEFT JOIN tab_hydrogen_site s ON s.id = b.hydrogen_station_id
      LEFT JOIN tab_outside_hydrogen_site os ON os.inner_site_id = b.hydrogen_station_id
+     LEFT JOIN tab_import_hydrogen_order i ON i.bill_code = b.bill_code
      WHERE b.is_deleted = 0
        AND b.hydrogen_time >= ?
        AND YEAR(${HYDROGEN_LOCAL}) = YEAR(CURDATE())
@@ -161,17 +164,22 @@ app.get('/hydrogen/daily', async (c) => {
   ].join(' AND ');
 
   // 站点级聚合（每日 × 每站）。前端组装成 day → stations
+  // 站点名 fallback 顺序：内部站表 → 外部站表 → 导入订单表（tab_import_hydrogen_order.hydrogen_station_name，按 bill_code 关联）
+  // 单价用「按量加权」的实际效率价：SUM(费用)/SUM(量)，同价组自动等于原价（不再产生意外小数）
   const [stationRows] = await pool.query<RowDataPacket[]>(
     `SELECT DATE_FORMAT(${HYDROGEN_LOCAL}, '%Y-%m-%d') AS d,
             b.hydrogen_station_id AS stationId,
-            COALESCE(s.short_name, s.name, os.fixed_station_name, os.station_name,
+            COALESCE(MAX(s.short_name), MAX(s.name),
+                     MAX(os.fixed_station_name), MAX(os.station_name),
+                     MAX(i.hydrogen_station_name),
                      CASE WHEN b.hydrogen_station_id IS NULL THEN '未关联站点'
                           ELSE CONCAT('未知站点 #', b.hydrogen_station_id) END) AS stationName,
-            SUM(b.hydrogen_quantity) AS kg,
+            ROUND(SUM(b.hydrogen_quantity), 2) AS kg,
-            AVG(b.cost_price) AS pricePerKg
+            ROUND(SUM(b.cost_expense) / NULLIF(SUM(b.hydrogen_quantity), 0), 2) AS pricePerKg
      FROM tab_energy_hydrogen_bill b
      LEFT JOIN tab_hydrogen_site s ON s.id = b.hydrogen_station_id
      LEFT JOIN tab_outside_hydrogen_site os ON os.inner_site_id = b.hydrogen_station_id
+     LEFT JOIN tab_import_hydrogen_order i ON i.bill_code = b.bill_code
      WHERE ${where}
      GROUP BY d, b.hydrogen_station_id
      ORDER BY d DESC, kg DESC`,