Translate English built from template literals in attributes

i18n-literals now flags a template literal in a UI attribute or prop when
there are words between its values: `Remove ${email}`, `${name} — shared by
${owner}`. It cannot be a catalogue key as written, so neither the key
exemption nor the sentence-shape test applies. A template that is only
punctuation around values, like `${name} (${size})`, is left alone.

The twelve it found are now keys with placeholders: the quota bar title,
the address menu's label, a folder's subfolder unread count, a recipient
chip's remove button, the contact editor's title, shared and available
calendars and address books, the date and time fields' labels, the
attachment title's fallback name, and the free/busy bar. The bar showed
the raw JMAP busyStatus ("confirmed") and now says Busy, Tentative or
Unavailable.

11 new keys in all nine catalogues. Remove {address}, Date, Time, Busy and
Tentative already existed.

web/src/views/contacts/ContactEditor.tsx

@@ -156,7 +156,7 @@ export function ContactEditor({ card, defaultBookId, onClose, onSaved }: Props)
   const photoSrc = photo?.dataUrl ?? (!removePhoto && existingPhoto ? (existingPhoto.uri?.startsWith("data:") ? existingPhoto.uri : existingPhoto.blobId ? client.downloadUrl(contacts.accountId!, existingPhoto.blobId, "photo", existingPhoto.mediaType ?? "image/jpeg", true) : null) : null);
 
   return (
-    <Dialog open onClose={onClose} title={isNew ? t("New contact") : `Edit ${contactDisplayName(card as ContactCard)}`} size="lg" footer={<><button className="btn" onClick={onClose}>{t("Cancel")}</button><button className="btn btn-primary" disabled={busy} onClick={() => void save()}>{busy ? t("Saving…") : t("Save")}</button></>}>
+    <Dialog open onClose={onClose} title={isNew ? t("New contact") : t("Edit {name}", { name: contactDisplayName(card as ContactCard) })} size="lg" footer={<><button className="btn" onClick={onClose}>{t("Cancel")}</button><button className="btn btn-primary" disabled={busy} onClick={() => void save()}>{busy ? t("Saving…") : t("Save")}</button></>}>
       <div className="contact-form">
         <div className="row" style={{ gap: 16, marginBottom: 12 }}>
           <label className="avatar xl" style={{ background: "var(--bg-sunken)", color: "var(--fg-muted)", cursor: "pointer", position: "relative" }} title={t("Change photo")}>