test(plugins): trim catalog tests to invariants against the new shapes

538+570+296+216 lines of change-detectors → 4 files of contract tests:
seed catalog valid, bad entries skipped, kill list name-or-repo, live
fallback+union; real-git pinned install + sidecar + re-pin; kill list
blocks CLI/dashboard/TUI with only the CLI bypass; dashboard merge via
sidecar; probe get_config default; extractor live document.

tests/website/test_extract_plugins.py

@@ -157,6 +157,11 @@ def test_main_writes_catalog_and_meta(mod, tmp_path):
     assert meta["byTier"] == {"official": 1, "community": 1}
     assert meta["removedCount"] == 1
     assert meta["generatedAt"]
+    # The live-refresh document consumed by installed clients: loader-schema entries + the kill list.
+    from hermes_cli.plugin_catalog import entry_from_mapping
+    live = json.loads((out_dir / "plugin-catalog.json").read_text(encoding="utf-8"))
+    assert [entry_from_mapping(raw, "live").name for raw in live["entries"]] == ["alpha", "beta"]
+    assert live["removed"] == [{"name": "gone"}]
 
 
 def test_missing_catalog_dir_degrades_to_empty_outputs_exit_zero(mod, tmp_path):