perf: consolidate initial navigation loading

tests/test_mvp_backend.py

@@ -12,6 +12,23 @@ def boot(client):
     return client.get("/api/v1/lists").json()[0]
 
 
+def test_bootstrap_returns_navigation_and_current_user(client):
+    inbox = boot(client)
+    client.post("/api/v1/folders", json={"name": "工作"})
+    client.post("/api/v1/tags", json={"name": "重要", "color": "#ff0000"})
+    client.post("/api/v1/tasks", json={"title": "首屏任务", "list_id": inbox["id"]})
+
+    response = client.get("/api/v1/bootstrap")
+
+    assert response.status_code == 200
+    data = response.json()
+    assert data["user"]["username"] == "owner"
+    assert any(row["id"] == inbox["id"] for row in data["lists"])
+    assert [row["name"] for row in data["folders"]] == ["工作"]
+    assert [row["name"] for row in data["tags"]] == ["重要"]
+    assert data["inbox_id"] == inbox["id"]
+
+
 def test_recurring_calendar_exceptions_and_scopes(client):
     inbox = boot(client)
     task = client.post(