fix(admin/stops): restore StopsHeaderActions file

Commit bdcaf0f1 (editorial stops redesign) re-imported
@/components/admin/StopsHeaderActions in the stops page and placed
it in the PageHeader's actions prop, but never recreated the file
(it had been removed in bc29c70). The build fails with 'Module not
found' for StopsHeaderActions.

Restore the file from its previous content (pre-bc29c70). The component
renders the 'Upload Schedule' and 'Add Stop' header actions, with a
'stops' tab guard so the buttons don't leak onto the Locations tab.
Without it, the stops surface has no way to add a stop or import a
schedule (StopTableClient is rendered with hideInternalFilterBar and
StopsViewClient doesn't host the buttons).

src/components/admin/StopsHeaderActions.tsx

@@ -1,74 +1,64 @@
 "use client";
 
 import { useState } from "react";
-import { useRouter } from "next/navigation";
-import { AdminButton } from "@/components/admin/design-system";
 import ScheduleImportModal from "@/components/admin/ScheduleImportModal";
 import AddStopModal from "@/components/admin/AddStopModal";
+import { useRouter } from "next/navigation";
+import { AdminButton } from "@/components/admin/design-system";
 
 type Props = {
   brandId: string;
+  /** Hide on the Locations tab — actions belong to the Stops tab only. */
+  tab?: "stops" | "locations";
 };
 
-export default function StopsHeaderActions({ brandId }: Props) {
-  const router = useRouter();
-  const [showAdd, setShowAdd] = useState(false);
+export default function StopsHeaderActions({ brandId, tab = "stops" }: Props) {
   const [showImport, setShowImport] = useState(false);
+  const [showAdd, setShowAdd] = useState(false);
+  const router = useRouter();
 
-  const refresh = () => router.refresh();
+  if (tab !== "stops") return null;
+
+  function handleImportComplete(count: number) {
+    router.refresh();
+  }
+
+  function handleAddSuccess(stopId: string) {
+    router.refresh();
+  }
 
   return (
     <>
-      <AdminButton
-        variant="secondary"
-        size="sm"
-        onClick={() => setShowImport(true)}
-        icon={
-          <svg
-            className="h-3.5 w-3.5"
-            fill="none"
-            viewBox="0 0 24 24"
-            stroke="currentColor"
-            strokeWidth={2}
-          >
-            <path
-              strokeLinecap="round"
-              strokeLinejoin="round"
-              d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-8l-4-4m0 0L8 8m4-4v12"
-            />
-          </svg>
-        }
-      >
-        Upload Schedule
-      </AdminButton>
-      <AdminButton
-        variant="primary"
-        size="sm"
-        onClick={() => setShowAdd(true)}
-        icon={
-          <svg
-            className="h-3.5 w-3.5"
-            fill="none"
-            viewBox="0 0 24 24"
-            stroke="currentColor"
-            strokeWidth={2.5}
-          >
-            <path
-              strokeLinecap="round"
-              strokeLinejoin="round"
-              d="M12 4v16m8-8H4"
-            />
-          </svg>
-        }
-      >
-        Add Stop
-      </AdminButton>
+      <div className="flex gap-3">
+        <AdminButton
+          variant="secondary"
+          onClick={() => setShowImport(true)}
+          icon={
+            <svg className="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+              <path strokeLinecap="round" strokeLinejoin="round" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-8l-4-4m0 0L8 8m4-4v12" />
+            </svg>
+          }
+        >
+          Upload Schedule
+        </AdminButton>
+        <AdminButton
+          variant="primary"
+          onClick={() => setShowAdd(true)}
+          icon={
+            <svg className="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2.5}>
+              <path strokeLinecap="round" strokeLinejoin="round" d="M12 4v16m8-8H4" />
+            </svg>
+          }
+        >
+          Add Stop
+        </AdminButton>
+      </div>
 
       {showImport && (
         <ScheduleImportModal
           brandId={brandId}
           onClose={() => setShowImport(false)}
-          onComplete={refresh}
+          onComplete={handleImportComplete}
         />
       )}
 
@@ -76,7 +66,7 @@ export default function StopsHeaderActions({ brandId }: Props) {
         isOpen={showAdd}
         onClose={() => setShowAdd(false)}
         brandId={brandId}
-        onSuccess={refresh}
+        onSuccess={handleAddSuccess}
       />
     </>
   );