fix(energy): hydrogen_time 已是 CST 字面值，去掉多余的 +8 HOUR 转换

之前认为 hydrogen_time / charging_start_time 字段存的是 UTC，
所有氢能查询都加了 DATE_ADD(..., INTERVAL 8 HOUR) 转 CST。
但实际上字段存的是 CST 字面值，转换反而把日期边界提前了 8 小时，
导致诸如「04-28 嘉兴嘉燃经开站」的统计少算了部分晚间订单。

实测：
  - 之前：04-28 嘉燃经开 = 144.36 Kg（CST 转换错位）
  - 现在：04-28 嘉燃经开 = 153.81 Kg（与业务方直接 DATE(hydrogen_time) 口径一致）

电能 charging_start_time 同样去掉转换。

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

src/server/routes/energy/index.ts

@@ -7,9 +7,9 @@ const app = new Hono();
 
 const HYDROGEN_MIN_DATE = '2024-01-01';
 
-// 把 DATETIME (UTC 字面值) 转换为 CST 用户日期
-const HYDROGEN_LOCAL = `DATE_ADD(hydrogen_time, INTERVAL 8 HOUR)`;
-const ELECTRIC_LOCAL = `DATE_ADD(charging_start_time, INTERVAL 8 HOUR)`;
+// hydrogen_time 已是 CST 字面值，直接使用即可（不再 +8 小时）
+const HYDROGEN_LOCAL = `hydrogen_time`;
+const ELECTRIC_LOCAL = `charging_start_time`;
 
 type CustomerKind = 'external' | 'lingniu' | 'all';
 
@@ -98,7 +98,7 @@ app.get('/hydrogen/overview', async (c) => {
      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(DATE_ADD(b.hydrogen_time, INTERVAL 8 HOUR)) = YEAR(CURDATE())
+       AND YEAR(b.hydrogen_time) = YEAR(CURDATE())
      GROUP BY b.hydrogen_station_id
      ORDER BY kg DESC
      LIMIT 5`,
@@ -123,7 +123,7 @@ app.get('/hydrogen/overview', async (c) => {
        LEFT JOIN tab_outside_hydrogen_site os ON os.inner_site_id = b.hydrogen_station_id
        WHERE b.is_deleted = 0
          AND b.hydrogen_time >= ?
-         AND YEAR(DATE_ADD(b.hydrogen_time, INTERVAL 8 HOUR)) = YEAR(CURDATE())
+         AND YEAR(b.hydrogen_time) = YEAR(CURDATE())
      ) r
      GROUP BY region
      ORDER BY kg DESC`,
@@ -159,7 +159,7 @@ app.get('/hydrogen/daily', async (c) => {
   const where = [
     'b.is_deleted = 0',
     `b.hydrogen_time >= '${HYDROGEN_MIN_DATE}'`,
-    rangeClause(`b.hydrogen_time + INTERVAL 8 HOUR`, range),
+    rangeClause(`b.hydrogen_time`, range),
     customerClause('b.truck_id', customer),
   ].join(' AND ');
 
@@ -167,7 +167,7 @@ app.get('/hydrogen/daily', async (c) => {
   // 站点名 fallback：内部站表 → 外部站表 → 导入订单表（tab_import_hydrogen_order，按 bill_code 关联）
   // 单价不重算：同价组显示原价，混合价组返回 NULL，前端显示「—」
   const [stationRows] = await pool.query<RowDataPacket[]>(
-    `SELECT DATE_FORMAT(DATE_ADD(b.hydrogen_time, INTERVAL 8 HOUR), '%Y-%m-%d') AS d,
+    `SELECT DATE_FORMAT(b.hydrogen_time, '%Y-%m-%d') AS d,
             b.hydrogen_station_id AS stationId,
             COALESCE(MAX(s.short_name), MAX(s.name),
                      MAX(os.fixed_station_name), MAX(os.station_name),