feat: public text items, wall, and detail API

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/tests/conftest.py

@@ -0,0 +1,31 @@
+from pathlib import Path
+
+import pytest
+from fastapi.testclient import TestClient
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+
+@pytest.fixture()
+def client(tmp_path: Path, monkeypatch: pytest.MonkeyPatch):
+    monkeypatch.setenv("DATA_DIR", str(tmp_path))
+
+    from app.config import Settings
+    import app.config as config_module
+    import app.db as db_module
+    import app.main as main_module
+
+    settings = Settings(_env_file=None, DATA_DIR=tmp_path)
+    config_module.settings = settings
+
+    engine = create_engine(
+        settings.db_url,
+        connect_args={"check_same_thread": False},
+    )
+    SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+    db_module.engine = engine
+    db_module.SessionLocal = SessionLocal
+    main_module.engine = engine
+
+    with TestClient(main_module.app) as test_client:
+        yield test_client