fix: make Langflow-synced flows visible (lfx volume perms, pull dedup)

backend/tests/test_export.py

@@ -37,3 +37,30 @@ def test_iter_flow_files_only_top_level_json(tmp_path):
     sub.mkdir()
     (sub / "c.json").write_text("{}")
     assert export.iter_flow_files(tmp_path) == [tmp_path / "a.json"]
+
+
+def test_find_reuse_path_matches_identical_content_first(tmp_path):
+    doc = {"name": "Simple Rule", "data": {"nodes": [], "edges": []}}
+    other = tmp_path / "other-name.json"
+    other.write_text(export.canonical_bytes(doc).decode())
+    path, identical = export.find_reuse_path(tmp_path, dict(doc))
+    assert (path, identical) == (other, True)
+
+
+def test_find_reuse_path_matches_same_name(tmp_path):
+    old = {"name": "Simple Rule", "data": {"nodes": [], "edges": []}, "extra": 1}
+    (tmp_path / "simple_rule.json").write_text(json.dumps(old))
+    new = {"name": "Simple Rule", "data": {"nodes": [], "edges": []}}
+    path, identical = export.find_reuse_path(tmp_path, new)
+    assert (path, identical) == (tmp_path / "simple_rule.json", False)
+
+
+def test_find_reuse_path_no_match_and_missing_dir(tmp_path):
+    (tmp_path / "a.json").write_text(json.dumps({"name": "Other"}))
+    assert export.find_reuse_path(tmp_path, {"name": "Neu"}) == (None, False)
+    assert export.find_reuse_path(tmp_path / "gibts-nicht", {"name": "Neu"}) == (None, False)
+
+
+def test_find_reuse_path_skips_unreadable_files(tmp_path):
+    (tmp_path / "kaputt.json").write_text("{kein json")
+    assert export.find_reuse_path(tmp_path, {"name": "Neu"}) == (None, False)

backend/tests/test_sync.py

@@ -176,6 +176,31 @@ async def test_sync_endpoint_pulls_from_langflow_then_syncs(
     assert body["skipped"] == ["gehaltserh-hung"]
 
 
+async def test_sync_endpoint_pull_reuses_same_named_file(
+    client, lfx_server, tmp_path, monkeypatch, login, override_langflow
+):
+    """A pulled flow seeded from simple_rule.json updates it in place
+    instead of duplicating it as simple-rule.json (slug drift)."""
+    await login()
+    monkeypatch.setattr(settings, "flows_dir", str(tmp_path))
+    _seed_dir(tmp_path)  # fixture shape, name "simple_rule"
+    langflow_id = "44444444-5555-4666-8777-888888888888"
+    override_langflow(
+        flows=[{"id": langflow_id, "name": "simple_rule"}],
+        docs={langflow_id: _langflow_doc("simple_rule", langflow_id)},
+    )
+    response = await client.post("/api/flows/sync")
+    assert response.status_code == 200, response.text
+    body = response.json()
+    assert body["pulled"] == ["simple_rule"]
+    assert body["added"] == ["simple_rule"]
+    assert body["errors"] == {}
+    assert not (tmp_path / "simple-rule.json").exists()
+
+    response = await client.post("/api/flows/sync")
+    assert response.json()["skipped"] == ["simple_rule"]
+
+
 async def test_sync_endpoint_pull_error_continues(
     client, lfx_server, tmp_path, monkeypatch, login, override_langflow
 ):