P&L monthly: span the fiscal year so columns aren't limited to one month

The monthly P&L was bound to the page Period, which defaults to the
current month — so 'Monthly columns' showed only a single column. When the
selected period is a single month, widen the start to the fiscal year
containing the end date (per company fiscal_year_start) so every month of
the FY-to-date gets a column with none missing. A multi-month selected
range is still respected as-is.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/pages/accounting/AccountingReportsPage.tsx

@@ -676,7 +676,7 @@ export default function AccountingReportsPage({ association }: { association?: {
           <BudgetVsActuals companyId={cid} from={from} to={to} currency={cur} companyName={associationName ?? "Company"} rangeLabel={rangeLabel} logoUrl={logoUrl} />
         )}
         {active === "pnl" && pnlMonthView && (
-          <IncomeStatementReport companyId={cid} companyName={associationName ?? "Company"} from={from} to={to} currency={cur} logoUrl={logoUrl} />
+          <IncomeStatementReport companyId={cid} companyName={associationName ?? "Company"} from={from} to={to} fiscalYearStart={fiscalYearStart} currency={cur} logoUrl={logoUrl} />
         )}
         {active === "trial-balance" && (
           <TrialBalanceReport companyId={cid} companyName={associationName ?? ""} logoUrl={logoUrl} to={to} />
@@ -853,6 +853,14 @@ function isBuildPeriods(from: string, to: string, gran: ISGran): { key: string;
   return out;
 }
 
+/** First day of the fiscal year that contains `to`, given an "MM-DD" FY start. */
+function isFyStartFor(to: string, fyStart: string): string {
+  const [mm, dd] = (fyStart || "01-01").split("-").map(Number);
+  const ty = Number(to.slice(0, 4));
+  const candidate = `${ty}-${isPad2(mm || 1)}-${isPad2(dd || 1)}`;
+  return to >= candidate ? candidate : `${ty - 1}-${isPad2(mm || 1)}-${isPad2(dd || 1)}`;
+}
+
 /** Period key a given YYYY-MM-DD date falls into, for the chosen granularity. */
 function isPeriodKey(date: string, gran: ISGran): string {
   if (gran === "month") return date.slice(0, 7);
@@ -898,22 +906,31 @@ function isGroupAccts(accts: ISAcct[], periods: { key: string }[]): ISGroup[] {
   return groups;
 }
 
-function IncomeStatementReport({ companyId, companyName, from, to, currency, logoUrl }: {
+function IncomeStatementReport({ companyId, companyName, from, to, fiscalYearStart, currency, logoUrl }: {
-  companyId: string; companyName: string; from: string; to: string; currency: string; logoUrl?: string | null;
+  companyId: string; companyName: string; from: string; to: string; fiscalYearStart?: string; currency: string; logoUrl?: string | null;
 }) {
   const [gran, setGran] = useState<ISGran>("month");
 
+  // The point of the monthly P&L is a column per period. If the page Period is a
+  // single month (the default), there'd be just one column — so widen the start
+  // to the fiscal year containing `to`, giving every month of the FY-to-date.
+  // A multi-month selected range is respected as-is.
+  const effFrom = useMemo(
+    () => (from.slice(0, 7) === to.slice(0, 7) ? isFyStartFor(to, fiscalYearStart || "01-01") : from),
+    [from, to, fiscalYearStart],
+  );
+
   const { data: glLines = [], isLoading } = useQuery({
-    queryKey: ["income-statement-gl", companyId, from, to],
+    queryKey: ["income-statement-gl", companyId, effFrom, to],
     enabled: !!companyId,
     queryFn: () => fetchAllGLLines(
       companyId, to,
       "id,debit,credit,accounts!inner(id,name,code,type,category),journal_entries!inner(company_id,date)",
-      from,
+      effFrom,
     ),
   });
 
-  const periods = useMemo(() => isBuildPeriods(from, to, gran), [from, to, gran]);
+  const periods = useMemo(() => isBuildPeriods(effFrom, to, gran), [effFrom, to, gran]);
 
   const model = useMemo(() => {
     const accts = new Map<string, ISAcct>();
@@ -942,7 +959,7 @@ function IncomeStatementReport({ companyId, companyName, from, to, currency, log
     return { incomeGroups, expenseGroups, incTot, expTot, net, hasRows: income.length > 0 || expense.length > 0 };
   }, [glLines, periods, gran]);
 
-  const subtitle = `${fmtDate(from)} – ${fmtDate(to)}, By ${gran[0].toUpperCase()}${gran.slice(1)}, Accrual basis`;
+  const subtitle = `${fmtDate(effFrom)} – ${fmtDate(to)}, By ${gran[0].toUpperCase()}${gran.slice(1)}, Accrual basis`;
   const { hasRows } = model;
 
   const exportPdf = async () => {
@@ -995,7 +1012,7 @@ function IncomeStatementReport({ companyId, companyName, from, to, currency, log
       },
     });
     drawBrandedFooter(doc);
-    doc.save(`profit-loss-${gran}-${from}-to-${to}.pdf`);
+    doc.save(`profit-loss-${gran}-${effFrom}-to-${to}.pdf`);
   };
 
   const exportCsv = () => {
@@ -1019,7 +1036,7 @@ function IncomeStatementReport({ companyId, companyName, from, to, currency, log
     const blob = new Blob([lines.join("\n")], { type: "text/csv" });
     const a = document.createElement("a");
     a.href = URL.createObjectURL(blob);
-    a.download = `profit-loss-${gran}-${from}-to-${to}.csv`;
+    a.download = `profit-loss-${gran}-${effFrom}-to-${to}.csv`;
     a.click();
     URL.revokeObjectURL(a.href);
   };