fix: align analysis defaults to latest completed month

frontend/public/app.js

@@ -153,9 +153,9 @@ const seatMapState = {
 
 let currentView = "project";
 const globalDateState = {
-  loaded: true,
-  startDate: "2026-01-01",
-  endDate: "2026-01-31",
+  loaded: false,
+  startDate: "",
+  endDate: "",
 };
 
 const organizationHistoryState = {
@@ -194,6 +194,58 @@ function getTodayDate() {
   return `${now.getFullYear()}-${padDatePart(now.getMonth() + 1)}-${padDatePart(now.getDate())}`;
 }
 
+function parseDateOnly(value) {
+  const raw = String(value || "").trim();
+  if (!raw) return null;
+  const match = raw.match(/^(\d{4})-(\d{2})-(\d{2})$/);
+  if (!match) return null;
+  const year = Number(match[1]);
+  const monthIndex = Number(match[2]) - 1;
+  const day = Number(match[3]);
+  const parsed = new Date(year, monthIndex, day);
+  if (
+    Number.isNaN(parsed.getTime())
+    || parsed.getFullYear() !== year
+    || parsed.getMonth() !== monthIndex
+    || parsed.getDate() !== day
+  ) {
+    return null;
+  }
+  return parsed;
+}
+
+function formatDateOnly(date) {
+  if (!(date instanceof Date) || Number.isNaN(date.getTime())) return "";
+  return `${date.getFullYear()}-${padDatePart(date.getMonth() + 1)}-${padDatePart(date.getDate())}`;
+}
+
+function getMonthRangeForDate(date) {
+  if (!(date instanceof Date) || Number.isNaN(date.getTime())) {
+    return { startDate: "", endDate: "" };
+  }
+  const start = new Date(date.getFullYear(), date.getMonth(), 1);
+  const end = new Date(date.getFullYear(), date.getMonth() + 1, 0);
+  return {
+    startDate: formatDateOnly(start),
+    endDate: formatDateOnly(end),
+  };
+}
+
+function getPreviousMonthRange(baseDate = new Date()) {
+  return getMonthRangeForDate(new Date(baseDate.getFullYear(), baseDate.getMonth() - 1, 1));
+}
+
+function resolveLatestCompletedMonthRange(maxDateText) {
+  const fallbackRange = getPreviousMonthRange();
+  const latestAvailableDate = parseDateOnly(String(maxDateText || "").slice(0, 10));
+  if (!latestAvailableDate) return fallbackRange;
+  const fallbackStart = parseDateOnly(fallbackRange.startDate);
+  if (fallbackStart && latestAvailableDate >= fallbackStart) {
+    return fallbackRange;
+  }
+  return getMonthRangeForDate(latestAvailableDate);
+}
+
 function syncOrganizationHistoryControls() {
   if (!organizationHistoryControls) return;
   const visible = currentView === "organization";
@@ -324,10 +376,10 @@ async function ensureGlobalDateRangeLoaded() {
     const payload = await fetchJson("/api/integration/summary");
     const work = payload?.date_ranges?.work || {};
     const voucher = payload?.date_ranges?.voucher || {};
-    const starts = [work.min_work_date, voucher.min_voucher_date].filter(Boolean).sort();
     const ends = [work.max_work_date, voucher.max_voucher_date].filter(Boolean).sort();
-    globalDateState.startDate = starts[0] ? String(starts[0]).slice(0, 10) : "";
-    globalDateState.endDate = ends.length ? String(ends[ends.length - 1]).slice(0, 10) : "";
+    const defaultRange = resolveLatestCompletedMonthRange(ends.length ? ends[ends.length - 1] : "");
+    globalDateState.startDate = defaultRange.startDate;
+    globalDateState.endDate = defaultRange.endDate;
     globalDateState.loaded = true;
     syncGlobalDateControlInputs();
     postGlobalDateRangeToFrame(projectFrame);