fix(i18n): add translation keys for integration grid categories and widget counts

Category labels and widget count badges in the integration grid were
hardcoded English strings. Add proper i18n keys under integration.grid
and integration.category so they can be translated.

packages/translation/src/lang/en.json

@@ -749,6 +749,37 @@
     "action": {
       "create": "New integration"
     },
+    "grid": {
+      "widgetCount": "{count} widgets",
+      "noWidgets": "No widgets"
+    },
+    "category": {
+      "dnsHole": "DNS",
+      "mediaService": "Media",
+      "calendar": "Calendar",
+      "mediaSearch": "Search",
+      "mediaRelease": "Releases",
+      "mediaRequest": "Requests",
+      "downloadClient": "Downloads",
+      "usenet": "Usenet",
+      "torrent": "Torrent",
+      "miscellaneous": "Misc",
+      "smartHomeServer": "Smart Home",
+      "indexerManager": "Indexer",
+      "healthMonitoring": "Health",
+      "search": "Search",
+      "mediaTranscoding": "Transcoding",
+      "networkController": "Network",
+      "releasesProvider": "Releases",
+      "notifications": "Notifications",
+      "firewall": "Firewall",
+      "timetable": "Timetable",
+      "photoService": "Photos",
+      "notes": "Notes",
+      "mediaMonitoring": "Monitoring",
+      "speedtest": "Speed Test",
+      "analytics": "Analytics"
+    },
     "testConnection": {
       "action": {
         "create": "Test connection and create",