fix: multi-node online stats, per-node Hy2 ports, and panel reload stability

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

panel/nodes_util.py

@@ -0,0 +1,16 @@
+"""节点端口与 inbound 标签（多节点统计用）。"""
+
+
+def ordered_nodes(nodes: list[dict]) -> list[dict]:
+    return sorted(nodes, key=lambda n: int(n["id"]))
+
+
+def hy2_port(node: dict, nodes: list[dict], base: int = 8443) -> int:
+    for index, item in enumerate(ordered_nodes(nodes)):
+        if int(item["id"]) == int(node["id"]):
+            return base + index
+    return base
+
+
+def hy2_inbound_tag(node_id: int) -> str:
+    return f"hy2-in-{node_id}"