fix(energy): checkpoint validated drill pagination and read-only preview

Co-authored-by: HiFox Agent <agents-noreply@hifox.com>

src/server/routes/energy/hydrogen-bi-v2.ts

@@ -765,7 +765,8 @@ async function drill(
         : groupBy === "date"
           ? `DATE_FORMAT(b.${HYDROGEN_LOCAL}, '%Y-%m-%d')`
           : "COALESCE(NULLIF(b.license_plate, ''), '无车牌')";
-  const groupOrder = groupBy === "date" ? "id DESC" : "kg DESC";
+  // Stable tie-breakers prevent equal-volume groups drifting between pages.
+  const groupOrder = groupBy === "date" ? "id DESC" : "kg DESC, id ASC, name ASC";
   const groupHaving =
     groupBy === "station" ? "HAVING SUM(COALESCE(b.amount_kg, 0)) > 0" : "";
   const [summaryRows, groupRows, recordRows] = await Promise.all([
@@ -864,7 +865,7 @@ async function drill(
       cost: number(row.cost),
       revenue: number(row.revenue),
     })),
-    page: { page, pageSize, hasMore: recordRows[0].length === pageSize },
+    page: { page, pageSize, hasMore: (groupBy === "record" ? recordRows[0] : groupRows[0]).length === pageSize },
   };
 }
 

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

@@ -246,13 +246,16 @@ test("氢能 BI v2 利润下钻只保留客户承担订单，并与对客总价
   } as unknown as HydrogenBiV2Dependencies);
 
   const response = await v2App.request(
-    "/h2/v2/drill?year=2026&vehicleScope=all&verifyScope=all&groupBy=station&amountScope=customer",
+    "/h2/v2/drill?year=2026&vehicleScope=all&verifyScope=all&groupBy=station&amountScope=customer&pageSize=1&page=2",
   );
   assert.equal(response.status, 200);
   const payload = await response.json();
   assert.equal(payload.amountScope, "customer");
+  assert.equal(payload.page.hasMore, true);
+  assert.deepEqual((calls[1].params as unknown[]).slice(-2), [1, 1]);
   assert.equal(payload.summary.revenue - payload.summary.cost, 60);
   assert.equal(calls.length, 2);
+  assert.match(calls[1].sql, /ORDER BY kg DESC, id ASC, name ASC LIMIT \? OFFSET \?/);
   for (const call of calls) {
     assert.match(
       call.sql,