'Folder created' toast does not quote the name ('Ordner Neue Belege erstellt') #409

Where: The folder.created string in web/src/i18n/en.json:440, de-du.json:440 and de-sie.json:440.

What happens: After "New folder", the toast reads "Ordner Neue Belege erstellt" (en: "Created folder Neue Belege"). Every other visible message that contains a name quotes it, with „{name}“ in German and “{name}” in English. Examples are appPasswords.created, smartFolders.renamed and the collision dialog.

Expected:

• de-du and de-sie: Ordner „{name}“ erstellt
• en: Created folder “{name}”

Fix: Change the three strings.

Test (Playwright, e2e/new-folder.spec.ts): Create the folder "Neue Belege". In de-du the status toast reads Ordner „Neue Belege“ erstellt; in en it reads Created folder “Neue Belege”. Fails today.

Found by the automatic review round (claude-opus-5-5, b739414); per CLAUDE.md the fix starts with a failing behaviour test.