fix: show latest invoice in billing trend

src/routes/dashboard/+page.server.ts

@@ -52,7 +52,7 @@ export const load: PageServerLoad = async ({ locals }) => {
 	const soonDate = dateOnly(addDays(today, 60));
 	const monthStart = dateOnly(startOfMonth(today));
 	const monthEnd = dateOnly(endOfMonth(today));
-	const sixMonthsAgo = startOfMonth(addMonths(today, -5));
+	const currentTrendStart = startOfMonth(addMonths(today, -5));
 
 	const activeContractCondition = and(
 		eq(contracts.organizationId, activeOrganizationId),
@@ -202,13 +202,7 @@ export const load: PageServerLoad = async ({ locals }) => {
 				totalGbp: invoices.totalGbp
 			})
 			.from(invoices)
-			.where(
-				and(
-					eq(invoices.organizationId, activeOrganizationId),
-					gte(invoices.issueDate, dateOnly(sixMonthsAgo)),
-					isNull(invoices.archivedAt)
-				)
-			)
+			.where(and(eq(invoices.organizationId, activeOrganizationId), isNull(invoices.archivedAt)))
 	]);
 
 	const activeContractIds = activeContractRows.map((contract) => contract.id);
@@ -292,9 +286,17 @@ export const load: PageServerLoad = async ({ locals }) => {
 		roomTypes.set(room.type, summary);
 	}
 
+	const hasCurrentTrendInvoices = billingTrendInvoiceRows.some(
+		(invoice) => parseISO(invoice.issueDate).getTime() >= currentTrendStart.getTime()
+	);
+	const trendEnd =
+		hasCurrentTrendInvoices || recentInvoiceRows.length === 0
+			? today
+			: parseISO(recentInvoiceRows[0].issueDate);
+	const trendStart = startOfMonth(addMonths(trendEnd, -5));
 	const billingTrendMap = new Map<string, { month: string; label: string; totalGbp: number }>();
 	for (let index = 0; index < 6; index += 1) {
-		const month = addMonths(sixMonthsAgo, index);
+		const month = addMonths(trendStart, index);
 		billingTrendMap.set(monthKey(month), {
 			month: monthKey(month),
 			label: monthLabel(month),
@@ -341,6 +343,7 @@ export const load: PageServerLoad = async ({ locals }) => {
 		recentInvoices: recentInvoiceRows,
 		meta: {
 			monthLabel: monthLabel(today),
+			billingTrendDescription: `Issued invoice totals from ${monthLabel(trendStart)} to ${monthLabel(trendEnd)}.`,
 			overdueInvoiceBasis:
 				'Invoices have no payment status yet, so this shows invoices past due date.'
 		}