feat: auto-position nodes and auto-assign edge handles on create

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

mcp/app/tools.py

@@ -21,6 +21,10 @@ _NODE_FIELDS = {
     "check_target":  {"type": "string", "description": "Target host/URL used by the status check."},
     "services":      {"type": "array", "items": {"type": "object"}, "description": "Running services detected or documented on the node."},
     "notes":         {"type": "string", "description": "Free-text notes / documentation for the node."},
+    "pos_x":         {"type": "number", "description": "X position on the canvas. Omit on create to auto-place (root nodes only)."},
+    "pos_y":         {"type": "number", "description": "Y position on the canvas. Omit on create to auto-place (root nodes only). For child nodes this is relative to the parent container."},
+    "width":         {"type": "number", "description": "Width of the node card in pixels. Mainly useful for container nodes."},
+    "height":        {"type": "number", "description": "Height of the node card in pixels. Mainly useful for container nodes."},
     "parent_id":     {"type": "string", "description": "ID of the parent node (e.g. Proxmox host for a VM/LXC). Pass null to detach."},
     "container_mode": {"type": "boolean", "description": "Render this node as a container/group that can hold children."},
     "custom_icon":   {"type": "string", "description": "Override icon name for the node."},