fix(import): honour the energy unit an archived workout carries

`totalEnergyBurned` rides the same account-display-unit contract as the
distance beside it: a Health app set to kilojoules writes `kJ`, and the
column is kilocalories. Convert it through the shared table.

Refs #944

src/lib/measurements/__tests__/import-apple-health-export.test.ts

@@ -1297,6 +1297,38 @@ describe("streamParseExportXml — the record's own unit (issue #944)", () => {
     expect(prisma._measurements[0].value).toBeCloseTo(2484, 6);
   });
 
+  it("stores a kilojoule workout burn in kilocalories", async () => {
+    const tmp = mkdtempSync(join(tmpdir(), "healthlog-parser-energy-test-"));
+    const xmlPath = join(tmp, "export.xml");
+    writeFileSync(
+      xmlPath,
+      `<?xml version="1.0" encoding="UTF-8"?>
+<HealthData locale="en_AU">
+  <Workout workoutActivityType="HKWorkoutActivityTypeRunning"
+           duration="42.0"
+           durationUnit="min"
+           totalDistance="6.5"
+           totalDistanceUnit="km"
+           totalEnergyBurned="1724"
+           totalEnergyBurnedUnit="kJ"
+           startDate="2026-05-14 18:00:00 +0200"
+           endDate="2026-05-14 18:42:00 +0200"
+           sourceName="Apple Watch"/>
+</HealthData>`,
+    );
+    const prisma = makeFakePrisma();
+    await streamParseExportXml({
+      xmlPath,
+      userId: "user-energy",
+      userTimezone: "Europe/Berlin",
+      prisma: prisma as unknown as PrismaClient,
+    });
+
+    expect(prisma._workouts).toHaveLength(1);
+    expect(prisma._workouts[0].totalDistanceM).toBeCloseTo(6500, 6);
+    expect(prisma._workouts[0].totalEnergyKcal).toBeCloseTo(412.0458891, 6);
+  });
+
   it("stores a mile-scale walking distance in metres", async () => {
     const { prisma } = await importCumulativeFixture(
       cumulativeExportXml(

src/lib/measurements/import-apple-health-export.ts

@@ -42,7 +42,10 @@ import {
 } from "@/lib/measurements/drain-per-sample-cumulative";
 import { reconcileExternalMeasurement } from "@/lib/measurements/reconcile-external-measurement";
 import { resolveHkWorkoutSportType } from "@/lib/measurements/hk-workout-activity-type-map";
-import { hkDistanceToMetres } from "@/lib/measurements/hk-units";
+import {
+  convertHkValue,
+  hkDistanceToMetres,
+} from "@/lib/measurements/hk-units";
 import { emitInsertedMeasurementArrivals } from "@/lib/arrivals/measurement-emit";
 import { maybeEnqueueMorningRefresh } from "@/lib/daily/morning-refresh-trigger";
 import { emitDataArrival } from "@/lib/arrivals/emit-shared";
@@ -948,6 +951,7 @@ export async function streamParseExportXml(
       const totalDistance = Number.parseFloat(attrs.totalDistance ?? "");
       const totalEnergy = Number.parseFloat(attrs.totalEnergyBurned ?? "");
       const distanceUnit = attrs.totalDistanceUnit ?? "";
+      const energyUnit = attrs.totalEnergyBurnedUnit ?? "";
       // Apple ships the ACCOUNT's own length unit on HKWorkout.totalDistance
       // (km for a metric account, mi for an imperial one); metres is the
       // canonical DB unit. issue #944 — the same conversion the `<Record>`
@@ -969,7 +973,13 @@ export async function streamParseExportXml(
         startedAt: startDate,
         endedAt: endDate,
         durationSec,
-        totalEnergyKcal: Number.isFinite(totalEnergy) ? totalEnergy : null,
+        totalEnergyKcal: Number.isFinite(totalEnergy)
+          ? // issue #944 — the energy attribute carries the account's own
+            // unit too: a Health app set to kilojoules writes `kJ` here, and
+            // the column is kilocalories. Same shared conversion; an unknown
+            // unit leaves the number alone.
+            (convertHkValue(totalEnergy, energyUnit, "kcal") ?? totalEnergy)
+          : null,
         totalDistanceM: distanceM,
         externalId,
         externalSourceVersion: attrs.sourceVersion ?? null,