Bound continuous calendar event loading

webui/tests/calendar-view-model.test.ts

@@ -1,5 +1,7 @@
 import {
+  continuousEventWindow,
   continuousVirtualWindow,
+  daysForMode,
   groupEventsByDay,
   layoutTimedEventsForDay,
   moveEventToDay,
@@ -49,6 +51,23 @@ assert(
   "virtualization should preserve offscreen geometry",
 );
 
+const continuousDays = daysForMode("continuous", focus, {
+  before: 50,
+  after: 50,
+});
+const eventWindow = continuousEventWindow(
+  continuousDays,
+  { scrollTop: 40 * 92, height: 6 * 92 },
+);
+assert(
+  (eventWindow.end.getTime() - eventWindow.start.getTime()) / 86_400_000 === 10 * 7,
+  "continuous event loading should stay bounded to a ten-week window",
+);
+assert(
+  eventWindow.start > continuousDays[0],
+  "continuous event loading should follow the virtualized viewport",
+);
+
 const day = new Date(2026, 6, 7);
 const parallel = [0, 1, 2, 3].map((index) =>
   event(