Show opt-in counts by feature

apps/supabase/migrations/20260102000002_add_feature_interest_counts_rpc.sql

@@ -0,0 +1,29 @@
+-- Expose per-feature opt-in counts for admins
+
+CREATE OR REPLACE FUNCTION public.get_feature_interest_counts()
+RETURNS TABLE (
+  feature_name TEXT,
+  opt_in_count BIGINT,
+  opt_in_count_last_7_days BIGINT
+)
+LANGUAGE plpgsql
+SECURITY DEFINER
+SET search_path = 'public'
+AS $$
+BEGIN
+  IF NOT has_permission('view_users') THEN
+    RAISE EXCEPTION 'Access denied';
+  END IF;
+
+  RETURN QUERY
+  SELECT
+    fi.feature_name,
+    COUNT(*)::BIGINT AS opt_in_count,
+    COUNT(*) FILTER (WHERE fi.created_at >= now() - interval '7 days')::BIGINT AS opt_in_count_last_7_days
+  FROM public.feature_interests fi
+  GROUP BY fi.feature_name
+  ORDER BY opt_in_count DESC, fi.feature_name ASC;
+END;
+$$;
+
+GRANT EXECUTE ON FUNCTION public.get_feature_interest_counts() TO authenticated;