Print a checklist without printing the application around it

The checklist gets a print view: one A4 page, header carrying personnel
number, name, date of extract, entry date and position, the items in two
flowing columns so twenty-five fit, and two signature lines at the foot.
It prints the *state*, dated — not a blank form.

The default filename in the save dialog comes from the document title,
which is set to the agreed convention:

  20260818_2884_Aigner-Manuel_Onboarding-Checklist

Surname first, like everywhere else in the application, so a folder of
these sorts by person and within a person by date. Umlauts are resolved
rather than stripped: the naive route (NFKD, then every non-ASCII to a
dash) turns "Müller" into "Mu-ller", because decomposition splits the
umlaut and the diaeresis becomes the dash. "Weiß" needs its own rule —
it has no decomposition and would otherwise vanish.

The reported defect: the printout carried the application's own top bar
— hamburger, bell, "Neueinstellung", sign-out. Those are controls; on
paper they are decoration, and on a checklist filed in a personnel
record, misleading. The rule now sits on AppShell rather than on this
one page, so the org-chart print view — which had the same problem —
gets it too, along with anything printed later. The shell's padding goes
with it: the type area is set by @page on the print page itself, and the
shell's would have been added on top.

The browser's own header line (date, title, URL) is separate — that is a
checkbox in the print dialog, not something CSS can reach.

440 tests pass, including 13 new ones pinning the filename convention.
Not yet seen in a browser.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

components/employees/tabs/ChecklistPanel.tsx

@@ -1,9 +1,10 @@
 "use client";
 
-import { MessageSquarePlus } from "lucide-react";
+import { MessageSquarePlus, Printer } from "lucide-react";
+import Link from "next/link";
 import { useRouter } from "next/navigation";
 import { useState } from "react";
-import { Button } from "@/components/ui/Button";
+import { Button, LINK_BUTTON_CLASS } from "@/components/ui/Button";
 import { useToast } from "@/components/ui/Toast";
 import {
   alleReichungen,
@@ -34,6 +35,8 @@ type Props = {
   /** Text, solange keine Liste existiert. */
   leerText: string;
   anlegenLabel: string;
+  /** Ziel für den Ausdruck — eine eigene Seite, siehe PrintChecklist. */
+  druckHref: string;
   onSpeichern: (
     itemKey: string,
     teil: { erledigt?: boolean; wert?: string | null; kommentar?: string | null }
@@ -41,7 +44,16 @@ type Props = {
   onAnlegen: () => Promise<ActionResult>;
 };
 
-export function ChecklistPanel({ gruppen, staende, vorhanden, leerText, anlegenLabel, onSpeichern, onAnlegen }: Props) {
+export function ChecklistPanel({
+  gruppen,
+  staende,
+  vorhanden,
+  leerText,
+  anlegenLabel,
+  druckHref,
+  onSpeichern,
+  onAnlegen,
+}: Props) {
   const { showToast } = useToast();
   const router = useRouter();
   const [laeuft, setLaeuft] = useState<string | null>(null);
@@ -86,6 +98,15 @@ export function ChecklistPanel({ gruppen, staende, vorhanden, leerText, anlegenL
 
   return (
     <div className="flex flex-col gap-6">
+      <div className="flex justify-end">
+        {/* Neuer Tab: der Ausdruck ist eine eigene Seite, und wer ihn schliesst,
+            steht wieder in der Akte statt auf einer leeren Historie. */}
+        <Link href={druckHref} target="_blank" className={LINK_BUTTON_CLASS}>
+          <Printer className="h-4 w-4" />
+          Als PDF speichern
+        </Link>
+      </div>
+
       <div className="rounded border border-border bg-surface px-3 py-2.5">
         <div className="flex flex-wrap items-baseline justify-between gap-2">
           <span className="text-sm font-semibold text-ink">