fix(web): align trend ranges, next runs and preview task records

tests/test_web_server.py

@@ -74,6 +74,13 @@ def test_readonly_routes_and_static():
             assert "text/html" in headers["Content-Type"]
             assert b"<html" in payload.lower()
 
+            for asset in ("/static/style.css", "/static/app.js", "/static/vendor/echarts.min.js"):
+                status, asset_headers, asset_payload = running.request(asset)
+                assert status == 200, asset
+                assert asset_payload, asset
+                content_type = asset_headers["Content-Type"]
+                assert "text/css" in content_type or "javascript" in content_type, asset
+
             status, _, payload = running.request("/static/../config.json")
             assert status == 404