fix(energy): 待核对上线期初改为 2026-01-01，并统一前后端口径

待核对订单的起算日原先硬编码为 2026-05-01，散落在后端 SQL、看板诊断卡
和下钻提示三处，改一处就会与另两处口径不一致。

- 新增 shared/hydrogen-verify.ts 的 HYDROGEN_VERIFY_START_DATE 作为唯一来源
- repository 的 unverified 过滤条件改为引用该常量，起算日提前到 2026-01-01
- 看板桌面/移动诊断卡与待核对下钻提示同步显示新日期
- 契约测试锁定字面量，防止日期被无意改动

仅影响 verifyScope=unverified；all / verified 口径不变。

src/server/routes/energy/routes.test.ts

@@ -20,6 +20,7 @@ import {
   registerHydrogenBiV2Routes,
   type HydrogenBiV2Dependencies,
 } from "./hydrogen-bi-v2.js";
+import { HYDROGEN_VERIFY_START_DATE } from "./constants.js";
 
 interface QueryCall {
   sql: string;
@@ -32,6 +33,9 @@ interface CacheCall {
 }
 
 test("待核对的汇总和下钻统一从核对上线期初起统计，不影响其他核对范围", async () => {
+  // 期初日期以字面量锁定：它同时被前端文案引用，改动必须是有意的。
+  assert.equal(HYDROGEN_VERIFY_START_DATE, "2026-01-01");
+  const cutoverClause = `b.refuel_time >= '${HYDROGEN_VERIFY_START_DATE}'`;
   for (const scope of ["unverified", "all", "verified"]) {
     for (const endpoint of ["overview", "drill"]) {
       const calls: QueryCall[] = [];
@@ -44,7 +48,7 @@ test("待核对的汇总和下钻统一从核对上线期初起统计，不影
       const ledgerQueries = calls.filter(({ sql }) => sql.includes("FROM hydrogen_fuel_ledger b"));
       assert.ok(ledgerQueries.length > 0);
       for (const { sql } of ledgerQueries) {
-        assert.equal(sql.includes("b.refuel_time >= '2026-05-01'"), scope === "unverified");
+        assert.equal(sql.includes(cutoverClause), scope === "unverified");
       }
     }
   }