feat: punkt 5 (monitoring) — system dashboard backend+frontend, admin-only, auto-refresh 30s, alerting via notifications

frontend/src/i18n/locales/de.json

@@ -20,7 +20,8 @@
     "mcpSettings": "MCP Einstellungen",
     "reports": "Reports",
     "tasks": "Aufgaben",
-    "wiki": "Wiki"
+    "wiki": "Wiki",
+    "systemDashboard": "System Dashboard"
   },
   "auth": {
     "login": "Anmelden",
@@ -1281,6 +1282,47 @@
       "version": "Version"
     }
   },
+  "systemDashboard": {
+    "title": "System Dashboard",
+    "subtitle": "Echtzeit-Systemüberwachung",
+    "adminOnly": "Administrator-Zugriff erforderlich",
+    "loading": "Lade System-Metriken...",
+    "loadError": "Fehler beim Laden der System-Metriken",
+    "activeAlerts": "Aktive Alerts",
+    "statusUp": "OK",
+    "statusDegraded": "Degraded",
+    "statusDown": "Down",
+    "statusUnknown": "Unbekannt",
+    "database": "Datenbank",
+    "redis": "Redis",
+    "worker": "Worker",
+    "api": "API",
+    "plugins": "Plugins",
+    "storage": "Storage",
+    "llm": "LLM Nutzung",
+    "connections": "Verbindungen",
+    "tables": "Tabellen",
+    "dbSize": "DB-Größe",
+    "memoryUsage": "Speicher",
+    "peakMemory": "Peak",
+    "uptime": "Uptime",
+    "queueLength": "Queue-Länge",
+    "activeWorkers": "Aktive Worker",
+    "totalRequests": "Anfragen",
+    "errorCount": "Fehler",
+    "errorRate": "Fehlerrate",
+    "avgResponseTime": "Ø Antwortzeit",
+    "totalPlugins": "Entdeckt",
+    "activePlugins": "Aktiv",
+    "pluginErrors": "Fehler",
+    "diskUsage": "Festplattennutzung",
+    "fileCount": "Dateien",
+    "path": "Pfad",
+    "totalTokens": "Tokens gesamt",
+    "estimatedCost": "Geschätzte Kosten",
+    "tokens24h": "Tokens 24h",
+    "cost24h": "Kosten 24h"
+  },
   "editor": {
     "write": "Schreiben",
     "preview": "Vorschau",