feat(chat): save and view chat history — admin-only saved_chats, History page, open-a-chat return

tests/unit/test_caching.py

@@ -185,6 +185,30 @@ def test_empty_static_dir_is_dev(tmp_path) -> None:
     assert asset_version(str(empty)) == "dev"
 
 
+# ---------------------------------------------------------------------------
+# HTML_PAGES registration
+# ---------------------------------------------------------------------------
+
+
+def test_html_pages_include_history() -> None:
+    """Phase 50: the History page is registered in HTML_PAGES — without
+    this entry it would serve unversioned asset refs, which the
+    immutable-for-a-year asset caching would pin to stale CSS after a
+    deploy (the phase-35 git-sources lesson). The entry is ADDED —
+    every pre-phase-50 page stays registered."""
+    for path in (
+        "/",
+        "/index.html",
+        "/sources.html",
+        "/document.html",
+        "/login.html",
+        "/tuning.html",
+        "/git-sources.html",
+        "/history.html",
+    ):
+        assert path in caching.HTML_PAGES, f"{path} must be in HTML_PAGES"
+
+
 # ---------------------------------------------------------------------------
 # rewrite_asset_refs (task 02)
 # ---------------------------------------------------------------------------