Simplify the upload state and the story page data

The pause of the user and a missing ingest folder are separate checks.
One function gives the upload state to the settings and the story page.
A route that returns only a story no longer loads its chapters or asks
CWA for its book. The story page data loses the values that no page reads.

tests/test_optional_cwa.py

@@ -218,7 +218,7 @@ def test_build_without_ingest_succeeds_and_keeps_the_book_local(monkeypatch, tmp
     assert list(config.TMP_DIR.glob(f"story-{story_id}-*.epub"))
     assert not list((tmp_path / "ingest").iterdir())
     details = orchestrator.story_details(story_id)
-    assert details["uploads_paused"] is True
+    assert details["pause_uploads"] is True
     assert details["story"]["upload_held"] is True
     assert details["library_error"] is None
 
@@ -454,12 +454,11 @@ def test_missing_library_connection_is_not_an_approval_hold(client, monkeypatch)
     assert details["story"]["upload_held"] is False
     assert details["story"]["needs_approval"] is False
     assert details["link_books"] is False
-    assert details["library_matching_available"] is False
     assert details["ingest_available"] is True
     monkeypatch.setattr(config, "INGEST_DIR", None)
     assert client.get(f"/api/stories/{story_id}").json["ingest_available"] is False
     monkeypatch.setattr(config, "CWA_URL", "https://cwa.invalid")
-    assert client.get(f"/api/stories/{story_id}").json["library_matching_available"] is True
+    assert client.get(f"/api/stories/{story_id}").json["link_books"] is True
 
 
 @pytest.mark.parametrize("missing_ingest", [False, True])