feat(nextcloud-status): Modul mit Statusabruf, Versionsbewertung und Kachelansicht

- NextcloudInstance mit Zeilenschutz, Migration 20261002150000
- Bewertung (Ampel) als reine Funktion, status.php-Abruf mit Grenzen, endoflife.date-Zwischenspeicher
- API: Liste mit Bewertung, Anlegen und Einzelprüfung nur mit Verwalten
- Modulseite mit Kacheln, Registrierung in Seitenleiste, Marktplatz und Symbolen

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

apps/web/src/messages/en.json

@@ -1814,5 +1814,43 @@
     "procurement": "Procurement",
     "accounting": "Financial accounting",
     "custom-modules": "Custom modules"
+  },
+  "nextcloudStatus": {
+    "title": "Nextcloud status",
+    "description": "Keep track of versions and availability of your Nextcloud clouds",
+    "loading": "Loading clouds …",
+    "loadError": "The clouds could not be loaded. Please reload the page.",
+    "empty": "No clouds have been added yet.",
+    "emptyManage": "Add your first cloud with “Add cloud”.",
+    "newestVersion": "Newest Nextcloud version: {version}",
+    "referenceUnavailable": "Version data currently unavailable",
+    "card": {
+      "version": "Version",
+      "versionUnknown": "—",
+      "lastCheck": "Last checked {age}",
+      "neverChecked": "Never checked",
+      "openCloud": "Open cloud in a new tab",
+      "noLogo": "No logo"
+    },
+    "level": {
+      "green": "Green",
+      "yellow": "Yellow",
+      "red": "Red",
+      "unknown": "Not rated"
+    },
+    "reason": {
+      "current": "Up to date",
+      "updateAvailable": "Update to {version} available",
+      "eolSoon": "Support ends on {date}",
+      "eolPassed": "Support ended on {date}",
+      "eolPassedNoDate": "Support ended",
+      "unreachable": "Not reachable",
+      "invalidResponse": "Not a valid Nextcloud response",
+      "maintenance": "Maintenance mode",
+      "needsDbUpgrade": "Database upgrade pending",
+      "noReference": "Rating not possible",
+      "versionUnknown": "Version unknown",
+      "notChecked": "Not checked yet"
+    }
   }
 }