fix(desktop): simplify monthly schedule warning

Signed-off-by: Taylor Ho <taylorkmho@gmail.com>

desktop/src/features/workflows/ui/WorkflowScheduleFields.tsx

@@ -28,16 +28,9 @@ const WEEKDAYS = [
 const MONTH_DAYS = Array.from({ length: 31 }, (_, index) => String(index + 1));
 
 function monthlyDayWarning(monthDay: string): string | null {
-  switch (monthDay) {
-    case "29":
-      return "Day 29 does not occur in February every year, so this schedule will occasionally skip a month.";
-    case "30":
-      return "Day 30 does not occur in February, so this schedule will skip February.";
-    case "31":
-      return "Day 31 does not occur in every month, so this schedule will skip shorter months.";
-    default:
-      return null;
-  }
+  return Number(monthDay) > 28
+    ? "This schedule won’t run in some months."
+    : null;
 }
 
 function customCronSeed(schedule: ScheduleFormState): string {

desktop/tests/e2e/workflows.spec.ts

@@ -145,9 +145,7 @@ test("configures common schedules and exposes custom cron", async ({
   await inspector.getByText("Monthly", { exact: true }).click();
   await inspector.getByLabel("Day of month").selectOption("31");
   await expect(
-    inspector.getByText(
-      "Day 31 does not occur in every month, so this schedule will skip shorter months.",
-    ),
+    inspector.getByText("This schedule won’t run in some months."),
   ).toBeVisible();
   await dialog.getByRole("tab", { name: "YAML" }).click();
   await expect(dialog.getByLabel("Workflow YAML")).toHaveValue(