feat: trash (soft delete) with admin tool management

- tools: add deletedAt/deletedBy, soft delete via DELETE /tools/:id when
  actor has trash entitlement, else immediate hard delete
- trash endpoints: GET /tools/trash, POST /tools/trash (admin bulk),
  POST /tools/trash/restore, DELETE /tools/trash, POST /tools/trash/empty
- trash feature for premium/enterprise; exclude trashed from all public
  surfaces (browse, categories, features, tags, similar, ratings, costs,
  analytics, redundancy)
- TRASH_RETENTION_DAYS env (0 = keep forever) with hourly purge job
- frontend: /trash page (premium+, restore for all, permanent delete +
  empty for admin), admin Tools tab with multi-select bulk trash,
  sidebar Trash link, tool-detail delete hint

artifacts/toolrate/src/pages/tool-detail.tsx

@@ -76,6 +76,7 @@ export default function ToolDetail() {
 
   const { user, isAdmin, hasFeature } = useAuth();
   const canManageCosts = hasFeature("costs");
+  const hasTrash = hasFeature("trash");
   const deleteTool = useDeleteTool();
 
   const [similarData, setSimilarData] = useState<{ manual: any[]; auto: any[] } | null>(null);
@@ -860,7 +861,11 @@ export default function ToolDetail() {
         <AlertDialogHeader>
           <AlertDialogTitle>Delete this tool?</AlertDialogTitle>
           <AlertDialogDescription>
-            This will permanently remove <span className="font-medium">{tool?.name}</span> and all its ratings. This cannot be undone.
+            {hasTrash ? (
+              <>This will move <span className="font-medium">{tool?.name}</span> to the trash. It can be restored later.</>
+            ) : (
+              <>This will permanently remove <span className="font-medium">{tool?.name}</span> and all its ratings. This cannot be undone.</>
+            )}
           </AlertDialogDescription>
         </AlertDialogHeader>
         <AlertDialogFooter>