POLISH-1: move stray UI strings to de.ts (pageNav/moreData), gitignore Playwright artefacts, wire 'Abgabe abschliessen' -> /vertraege/neu?tiere= (FEAT-13b)

gerbil-manager-web/src/pages/GerbilDetailPage.tsx

@@ -181,7 +181,7 @@ export default function GerbilDetailPage() {
         <p className="muted">{t.detail.genotypeNotSet}</p>
       )}
 
-      <h3 className="visually-hidden">Weitere Daten</h3>
+      <h3 className="visually-hidden">{t.detail.moreData}</h3>
       <div className="tabs" role="tablist">
         {(['photos', 'health', 'weight'] as const).map((key) => (
           <button

gerbil-manager-web/src/pages/GerbilsPage.tsx

@@ -225,7 +225,7 @@ export default function GerbilsPage() {
       )}
 
       {totalPages > 1 && (
-        <nav className="pager" aria-label="Seitennavigation">
+        <nav className="pager" aria-label={de.common.pageNav}>
           <button
             type="button"
             className="btn"

gerbil-manager-web/src/pages/WuerfeListPage.tsx

@@ -171,7 +171,7 @@ export default function WuerfeListPage() {
           )}
 
           {totalPages > 1 && (
-            <nav className="pager" aria-label="Seitennavigation">
+            <nav className="pager" aria-label={de.common.pageNav}>
               <button
                 type="button"
                 className="btn"