fix: address greptile routine review

ui/src/lib/routine-trigger-patch.test.ts

@@ -0,0 +1,71 @@
+import { describe, expect, it } from "vitest";
+import type { RoutineTrigger } from "@paperclipai/shared";
+import { buildRoutineTriggerPatch } from "./routine-trigger-patch";
+
+function makeScheduleTrigger(overrides: Partial<RoutineTrigger> = {}): RoutineTrigger {
+  return {
+    id: "trigger-1",
+    companyId: "company-1",
+    routineId: "routine-1",
+    kind: "schedule",
+    label: "Daily",
+    enabled: true,
+    cronExpression: "0 10 * * *",
+    timezone: "UTC",
+    nextRunAt: null,
+    lastFiredAt: null,
+    publicId: null,
+    secretId: null,
+    signingMode: null,
+    replayWindowSec: null,
+    lastRotatedAt: null,
+    lastResult: null,
+    createdByAgentId: null,
+    createdByUserId: null,
+    updatedByAgentId: null,
+    updatedByUserId: null,
+    createdAt: new Date("2026-03-20T00:00:00.000Z"),
+    updatedAt: new Date("2026-03-20T00:00:00.000Z"),
+    ...overrides,
+  };
+}
+
+describe("buildRoutineTriggerPatch", () => {
+  it("preserves an existing schedule trigger timezone when saving edits", () => {
+    const patch = buildRoutineTriggerPatch(
+      makeScheduleTrigger({ timezone: "UTC" }),
+      {
+        label: "Daily label edit",
+        cronExpression: "0 10 * * *",
+        signingMode: "bearer",
+        replayWindowSec: "300",
+      },
+      "America/Chicago",
+    );
+
+    expect(patch).toEqual({
+      label: "Daily label edit",
+      cronExpression: "0 10 * * *",
+      timezone: "UTC",
+    });
+  });
+
+  it("falls back to the local timezone when a schedule trigger has none", () => {
+    const patch = buildRoutineTriggerPatch(
+      makeScheduleTrigger({ timezone: null }),
+      {
+        label: "",
+        cronExpression: "15 9 * * 1-5",
+        signingMode: "bearer",
+        replayWindowSec: "300",
+      },
+      "America/Chicago",
+    );
+
+    expect(patch).toEqual({
+      label: null,
+      cronExpression: "15 9 * * 1-5",
+      timezone: "America/Chicago",
+    });
+  });
+});

ui/src/lib/routine-trigger-patch.ts

@@ -0,0 +1,30 @@
+import type { RoutineTrigger } from "@paperclipai/shared";
+
+export type RoutineTriggerEditorDraft = {
+  label: string;
+  cronExpression: string;
+  signingMode: string;
+  replayWindowSec: string;
+};
+
+export function buildRoutineTriggerPatch(
+  trigger: RoutineTrigger,
+  draft: RoutineTriggerEditorDraft,
+  fallbackTimezone: string,
+) {
+  const patch: Record<string, unknown> = {
+    label: draft.label.trim() || null,
+  };
+
+  if (trigger.kind === "schedule") {
+    patch.cronExpression = draft.cronExpression.trim();
+    patch.timezone = trigger.timezone ?? fallbackTimezone;
+  }
+
+  if (trigger.kind === "webhook") {
+    patch.signingMode = draft.signingMode;
+    patch.replayWindowSec = Number(draft.replayWindowSec || "300");
+  }
+
+  return patch;
+}

ui/src/pages/RoutineDetail.tsx

@@ -24,6 +24,7 @@ import { useCompany } from "../context/CompanyContext";
 import { useBreadcrumbs } from "../context/BreadcrumbContext";
 import { useToast } from "../context/ToastContext";
 import { queryKeys } from "../lib/queryKeys";
+import { buildRoutineTriggerPatch } from "../lib/routine-trigger-patch";
 import { timeAgo } from "../lib/timeAgo";
 import { EmptyState } from "../components/EmptyState";
 import { PageSkeleton } from "../components/PageSkeleton";
@@ -61,7 +62,7 @@ const concurrencyPolicyDescriptions: Record<string, string> = {
 };
 const catchUpPolicyDescriptions: Record<string, string> = {
   skip_missed: "Ignore schedule windows that were missed while the routine or scheduler was paused.",
-  enqueue_missed_with_cap: "Catch up missed schedule windows with a capped backlog after recovery.",
+  enqueue_missed_with_cap: "Catch up missed schedule windows in capped batches after recovery.",
 };
 const signingModeDescriptions: Record<string, string> = {
   bearer: "Expect a shared bearer token in the Authorization header.",
@@ -212,20 +213,7 @@ function TriggerEditor({
           <Button
             variant="outline"
             size="sm"
-            onClick={() =>
-              onSave(trigger.id, {
-                label: draft.label.trim() || null,
-                ...(trigger.kind === "schedule"
-                  ? { cronExpression: draft.cronExpression.trim(), timezone: getLocalTimezone() }
-                  : {}),
-                ...(trigger.kind === "webhook"
-                  ? {
-                    signingMode: draft.signingMode,
-                    replayWindowSec: Number(draft.replayWindowSec || "300"),
-                  }
-                  : {}),
-              })
-            }
+            onClick={() => onSave(trigger.id, buildRoutineTriggerPatch(trigger, draft, getLocalTimezone()))}
           >
             <Save className="mr-1.5 h-3.5 w-3.5" />
             Save

ui/src/pages/Routines.tsx

@@ -43,7 +43,7 @@ const concurrencyPolicyDescriptions: Record<string, string> = {
 };
 const catchUpPolicyDescriptions: Record<string, string> = {
   skip_missed: "Ignore windows that were missed while the scheduler or routine was paused.",
-  enqueue_missed_with_cap: "Catch up missed schedule windows with a capped backlog after recovery.",
+  enqueue_missed_with_cap: "Catch up missed schedule windows in capped batches after recovery.",
 };
 
 function autoResizeTextarea(element: HTMLTextAreaElement | null) {