Add admin Activity page for curator audit reports.

Admins can filter and review curator_audit_log (date/time, actor, action, resource, details) via /api/audit against the environment DB.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/src/locales/en/audit.json

@@ -0,0 +1,40 @@
+{
+  "title": "Curator activity",
+  "back": "← Back",
+  "loadFailed": "Failed to load audit log",
+  "loading": "Loading…",
+  "empty": "No curator actions match these filters.",
+  "databaseUnknown": "Reading the audit log for this environment’s database.",
+  "databaseDev": "Dev database: {{name}}",
+  "databaseProd": "Production database: {{name}}",
+  "databaseNamed": "Database: {{name}}",
+  "statTotal": "Total (filtered)",
+  "stat24h": "Last 24 hours",
+  "stat7d": "Last 7 days",
+  "statNewest": "Most recent",
+  "filterCurator": "Curator",
+  "filterAction": "Action",
+  "filterResource": "Resource type",
+  "filterResourceId": "Resource id",
+  "filterFrom": "From",
+  "filterTo": "To",
+  "filterSearch": "Search",
+  "filterSearchPlaceholder": "Action, user, IP, details…",
+  "allCurators": "All curators",
+  "allActions": "All actions",
+  "allResources": "All resources",
+  "apply": "Apply filters",
+  "clear": "Clear",
+  "byCurator": "By curator",
+  "byAction": "By action",
+  "showing": "Showing {{count}} of {{total}}",
+  "page": "Page {{page}} / {{pages}}",
+  "colWhen": "Date & time",
+  "colCurator": "Curator",
+  "colAction": "Action",
+  "colResource": "Resource",
+  "colDetails": "Details",
+  "colIp": "IP",
+  "prev": "Previous",
+  "next": "Next"
+}

client/src/locales/en/home.json

@@ -18,6 +18,7 @@
   "tours": "Tours",
   "toursEditor": "Tour editor",
   "users": "Users",
+  "audit": "Activity",
   "openingTourGallery": "Opening guided tour…",
   "tourEmpty": "This tour has no paintings yet.",
   "tourLoadFailed": "Failed to load the tour.",