Hermetiska integrationstester + auto-hushall i onboarding (size, i18n, locations)

apps/api/src/lib/helpers.ts

@@ -47,6 +47,41 @@ export async function requireMembership(
   return { role: member.role, portionFactor: member.portionFactor };
 }
 
+/** Skapa hushåll med standard-förvaringsplatser (spec §7–8). Återanvänds av
+ * både POST /v1/households och onboarding auto-create. */
+export async function createHouseholdWithDefaults(
+  db: Database,
+  {
+    userId,
+    name,
+    size,
+  }: {
+    userId: string;
+    name: string;
+    size?: number;
+  },
+): Promise<{ id: string; name: string }> {
+  const [household] = await db
+    .insert(schema.households)
+    .values({
+      name,
+      inviteCode: generateInviteCode(),
+      size: size ?? null,
+    })
+    .returning();
+  await db.insert(schema.householdMembers).values({
+    householdId: household!.id,
+    userId,
+    role: "owner",
+  });
+  await db.insert(schema.storageLocations).values([
+    { householdId: household!.id, type: "fridge", name: "Kylen", sortOrder: 0 },
+    { householdId: household!.id, type: "freezer", name: "Frysen", sortOrder: 1 },
+    { householdId: household!.id, type: "pantry", name: "Skafferiet", sortOrder: 2 },
+  ]);
+  return { id: household!.id, name: household!.name };
+}
+
 /** Hämta användarens aktiva hushåll (första medlemskapet) eller null. */
 export async function getActiveHouseholdId(db: Database, userId: string): Promise<string | null> {
   const [member] = await db