feat(energy): 氢能总览补全维度（5KPI+收支+客户/加氢站全量+年份切换）

按 BI 页面 (https://bi.lnh2e.com/lingniu/decision/link/0iqP) 完整还原：
- 5 张 KPI：累计加氢量 / 累计加氢费 / 时享加氢获利 / 本月加氢 / 本日加氢
- 月度收支对比柱图：成本支出 vs 客户收入双柱
- 加氢站加氢汇总（全量 55 站）：加氢量+占比+氢费收入+收入占比，进度条
- 客户账单 Top 30：承担方 / 加氢量 / 成本支出 / 应收
- 年份切换（2025/2026），全量数据按选定年份重算
- 关键修正：用 cost_type 区分客户单/我司单（cost_type=2 客户单，cost_type=3 我司单），获利口径与 BI 对齐

后端 /hydrogen/overview 重写：
- 增加 customers/stations/availableYears/year 字段
- KPI 含 yearProfit/monthProfit/todayProfit
- monthly 含 fee/revenue/profit

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

src/modules/energy/api.ts

@@ -1,6 +1,7 @@
 import { fetchJson } from '../../auth/api-client';
 import type {
   HydrogenKpi, HydrogenStationTop, HydrogenRegionShare, HydrogenMonthlyPoint, HydrogenDailyRow,
+  HydrogenCustomerRow, HydrogenStationFull,
   ElectricKpi, ElectricDailyRow, ElectricMonthGroup,
   CustomerType, DateQuickPick,
 } from './types';
@@ -12,10 +13,15 @@ export interface HydrogenOverviewResponse {
   top5: HydrogenStationTop[];
   regions: HydrogenRegionShare[];
   monthly: HydrogenMonthlyPoint[];
+  customers: HydrogenCustomerRow[];
+  stations: HydrogenStationFull[];
+  availableYears: number[];
+  year: number;
 }
 
-export function fetchHydrogenOverview(): Promise<HydrogenOverviewResponse> {
-  return fetchJson<HydrogenOverviewResponse>(`${BASE}/hydrogen/overview`);
+export function fetchHydrogenOverview(year?: number): Promise<HydrogenOverviewResponse> {
+  const q = year ? `?year=${year}` : '';
+  return fetchJson<HydrogenOverviewResponse>(`${BASE}/hydrogen/overview${q}`);
 }
 
 export function fetchHydrogenDaily(range: DateQuickPick, customer: CustomerType): Promise<HydrogenDailyRow[]> {