feat(web): show first-RE time on up page, drop decoupled folder badges

tests/test_web_queries.py

@@ -196,6 +196,8 @@ def test_up_queries():
             assert detail["series"]["dates"] == list(DATES)
             assert detail["series"]["views"] == [6000, 6200, 6400]
             assert detail["space_url"].endswith("/1")
+            assert "folders" not in detail
+            assert detail["first_pubdate"] > 0
 
             blacklisted = q.up_detail(2)
             assert blacklisted["blacklisted"] is True