Keep monitor alive across nav and speed up status collect.

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

control/backend/app/api/nodes.py

@@ -56,26 +56,39 @@ async def _collect_one_status(
     *,
     timeout: float | None = None,
 ) -> dict[str, Any]:
+    """有 Token 时只打 fleet/status（含在线+持仓），避免 /health 再多一跳。"""
+    base = _public_node(node)
+    if not node.get("token_sealed"):
+        probe = await probe_health(node, timeout=timeout)
+        return {
+            **base,
+            **probe,
+            "fleet_ok": False,
+            "fleet_error": "未生成 Token",
+        }
+
+    code, data = await call_node(
+        node, "GET", "/api/fleet/status", timeout=timeout
+    )
+    if code == 200 and isinstance(data, dict):
+        return {
+            **base,
+            "online": True,
+            "health": None,
+            "error": None,
+            "from_fleet": True,
+            "fleet": data,
+            "fleet_ok": True,
+        }
+
+    # fleet 失败时再探 /health，区分离线 vs Token 错误
     probe = await probe_health(node, timeout=timeout)
-    item: dict[str, Any] = {**_public_node(node), **probe}
-    if probe.get("online") and node.get("token_sealed"):
-        # /health 也有 mode+strategy，但不能当 fleet（无持仓详情）。
-        # 仅当 probe 已用 fleet 回退时复用，否则必须再拉 /api/fleet/status。
-        if probe.get("from_fleet") and isinstance(probe.get("health"), dict):
-            code, data = 200, probe["health"]
-        else:
-            code, data = await call_node(
-                node, "GET", "/api/fleet/status", timeout=timeout
-            )
-        if code == 200 and isinstance(data, dict):
-            item["fleet"] = data
-            item["fleet_ok"] = True
-        else:
-            item["fleet_ok"] = False
-            item["fleet_error"] = _http_detail(data) if data else f"HTTP {code}"
-    elif not node.get("token_sealed"):
-        item["fleet_ok"] = False
-        item["fleet_error"] = "未生成 Token"
+    item: dict[str, Any] = {
+        **base,
+        **probe,
+        "fleet_ok": False,
+        "fleet_error": _http_detail(data) if data else f"HTTP {code}",
+    }
     return item