Translate the rule sentences into German

#261 rebuilt the Sieve rule summaries and the recurrence descriptions as whole
sentences with placeholders, so that a translator can move the parts rather
than being handed " and " on its own. This is the German half of that.

32 strings and 9 plural forms. The ordinals are words -- there is no suffix to
append here, which was the point -- and the day and item lists are joined by
Intl.ListFormat rather than a translated separator.

web/src/locales/de.ts

@@ -1282,8 +1282,54 @@ export const catalog: Catalog = {
     "This message was sent automatically, so no read receipt is offered.": "Diese Nachricht wurde automatisch versendet, daher wird keine Lesebestätigung angeboten.",
     "This server will not hold a message longer than {span}.": "Dieser Server hält eine Nachricht nicht länger als {span} zurück.",
     "Upload failed": "Hochladen fehlgeschlagen",
+    // ── Third pass ──────────────────────────────────────────────────────
+    // Sentences that lib/ and store/ were building in English, and the two
+    // swipe labels that reach t() through a variable and so were invisible
+    // to a scan for t("literal"). See #259.
+    "Every {n} {frequency}": "Alle {n} {frequency}",
+    "Monthly": "Monatlich",
+    "Monthly on day {days}": "Monatlich am Tag {days}",
+    "Monthly on the {ordinal} {weekday}": "Monatlich am {ordinal} {weekday}",
+    "Monthly on {weekday}": "Monatlich am {weekday}",
+    "Weekly": "Wöchentlich",
+    "Weekly on {days}": "Wöchentlich am {days}",
+    "add {flag}": "{flag} hinzufügen",
+    "always": "immer",
+    "body contains \"{value}\"": "Text enthält \"{value}\"",
+    "body does not contain \"{value}\"": "Text enthält nicht \"{value}\"",
+    "delete it": "löschen",
+    "fifth": "fünften",
+    "first": "ersten",
+    "forward to {address}": "weiterleiten an {address}",
+    "fourth": "vierten",
+    "keep it": "behalten",
+    "last": "letzten",
+    "mark it read": "als gelesen markieren",
+    "move to {folder}": "verschieben nach {folder}",
+    "reject it": "abweisen",
+    "remove {flag}": "{flag} entfernen",
+    "second": "zweiten",
+    "size is over {n} KB": "Größe über {n} KB",
+    "size is under {n} KB": "Größe unter {n} KB",
+    "star it": "markieren",
+    "stop": "anhalten",
+    "third": "dritten",
+    "{header} address {op} \"{value}\"": "{header}-Adresse {op} \"{value}\"",
+    "{header} {op} \"{value}\"": "{header} {op} \"{value}\"",
+    "{rule}, until {date}": "{rule}, bis {date}",
+    "{tests} → {actions}": "{tests} → {actions}",
   },
   plurals: {
+    // ── Third pass ─────────────────────────────────────────────────────
+    "Every {n} days": { one: "Jeden Tag", other: "Alle {n} Tage" },
+    "Every {n} months": { one: "Jeden Monat", other: "Alle {n} Monate" },
+    "Every {n} months on day {days}": { one: "Jeden Monat am Tag {days}", other: "Alle {n} Monate am Tag {days}" },
+    "Every {n} months on the {ordinal} {weekday}": { one: "Jeden Monat am {ordinal} {weekday}", other: "Alle {n} Monate am {ordinal} {weekday}" },
+    "Every {n} months on {weekday}": { one: "Jeden Monat am {weekday}", other: "Alle {n} Monate am {weekday}" },
+    "Every {n} weeks": { one: "Jede Woche", other: "Alle {n} Wochen" },
+    "Every {n} weeks on {days}": { one: "Jede Woche am {days}", other: "Alle {n} Wochen am {days}" },
+    "Every {n} years": { one: "Jedes Jahr", other: "Alle {n} Jahre" },
+    "{rule}, {n} times": { one: "{rule}, {n}-mal", other: "{rule}, {n}-mal" },
     // ── Third pass ─────────────────────────────────────────────────────
     "Move {n} messages to Trash?": { one: "{n} Nachricht in den Papierkorb verschieben?", other: "{n} Nachrichten in den Papierkorb verschieben?" },
     "{n} days": { one: "{n} Tag", other: "{n} Tage" },