feat: mv data folder to root

backend/tests/test_data_root.py

@@ -0,0 +1,28 @@
+from pathlib import Path
+
+from app.core import data_root
+
+
+def test_data_root_prefers_env(monkeypatch, tmp_path: Path) -> None:
+    custom = tmp_path / "custom-data-root"
+    monkeypatch.setenv("DATA_ROOT", str(custom))
+    assert data_root.get_data_root() == custom.resolve()
+
+
+def test_data_root_falls_back_to_legacy(monkeypatch, tmp_path: Path) -> None:
+    monkeypatch.delenv("DATA_ROOT", raising=False)
+    legacy = tmp_path / "legacy-data"
+    default = tmp_path / "default-data"
+    legacy.mkdir(parents=True, exist_ok=True)
+    monkeypatch.setattr(data_root, "LEGACY_DATA_ROOT", legacy)
+    monkeypatch.setattr(data_root, "DEFAULT_DATA_ROOT", default)
+    assert data_root.get_data_root() == legacy
+
+
+def test_ensure_data_layout_creates_children(monkeypatch, tmp_path: Path) -> None:
+    monkeypatch.setenv("DATA_ROOT", str(tmp_path / "dr"))
+    data_root.ensure_data_layout()
+    root = data_root.get_data_root()
+    assert (root / "workspace").exists()
+    assert (root / "uploads").exists()
+    assert (root / "data").exists()