Persist runtime config in app db and seed from env

tests/test_app.py

@@ -25,8 +25,9 @@ def _prepare_app_db(tmp_path) -> str:
 
 
 def test_app_starts(client: TestClient) -> None:
-    response = client.get("/")
-    assert response.status_code == 200
+    response = client.get("/", follow_redirects=False)
+    assert response.status_code == 303
+    assert response.headers["location"] == "/login"
 
 
 def test_status_endpoint(client: TestClient) -> None:
@@ -73,11 +74,56 @@ def test_app_db_adoption_initializes_new_database(tmp_path) -> None:
                 "SELECT name FROM sqlite_master WHERE type = 'table' AND name NOT LIKE 'sqlite_%'"
             ).fetchall()
         }
-        assert {"auth_users", "auth_sessions", "alembic_version"} <= tables
+        assert {"auth_users", "auth_sessions", "app_config", "alembic_version"} <= tables
     finally:
         conn.close()
 
 
+def test_app_start_seeds_missing_config_from_env_without_overwriting_existing_values(
+    tmp_path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    app_database_url = _prepare_app_db(tmp_path)
+    location_database_path = tmp_path / "location_ready.db"
+    poo_database_path = tmp_path / "poo_ready.db"
+    command.upgrade(_make_alembic_config(f"sqlite:///{location_database_path}"), "head")
+    command.upgrade(_make_poo_alembic_config(f"sqlite:///{poo_database_path}"), "head")
+
+    app_database_path = tmp_path / "app_ready.db"
+    conn = sqlite3.connect(app_database_path)
+    conn.execute(
+        "INSERT INTO app_config (key, value, updated_at) VALUES (?, ?, CURRENT_TIMESTAMP)",
+        ("APP_NAME", "Database Owned Name"),
+    )
+    conn.commit()
+    conn.close()
+
+    monkeypatch.setenv("APP_DATABASE_URL", app_database_url)
+    monkeypatch.setenv("AUTH_BOOTSTRAP_USERNAME", "admin")
+    monkeypatch.setenv("AUTH_BOOTSTRAP_PASSWORD", "test-password")
+    monkeypatch.setenv("APP_NAME", "Bootstrap Name")
+    monkeypatch.setenv("HOME_ASSISTANT_BASE_URL", "http://bootstrap-ha.local:8123")
+    monkeypatch.setenv("LOCATION_DATABASE_URL", f"sqlite:///{location_database_path}")
+    monkeypatch.setenv("POO_DATABASE_URL", f"sqlite:///{poo_database_path}")
+    get_settings.cache_clear()
+    reset_auth_db_caches()
+
+    app = create_app()
+    anyio.run(_run_lifespan, app)
+
+    conn = sqlite3.connect(app_database_path)
+    try:
+        rows = dict(conn.execute("SELECT key, value FROM app_config").fetchall())
+    finally:
+        conn.close()
+
+    assert rows["APP_NAME"] == "Database Owned Name"
+    assert rows["HOME_ASSISTANT_BASE_URL"] == "http://bootstrap-ha.local:8123"
+    assert rows["AUTH_SESSION_COOKIE_NAME"] == "home_automation_session"
+
+    get_settings.cache_clear()
+    reset_auth_db_caches()
+
+
 def test_app_start_fails_when_location_db_missing(
     tmp_path, monkeypatch: pytest.MonkeyPatch
 ) -> None: