Fix: Stash VLESS/VMESS TCP/HTTP disguise node generation rules

[JxQg]

This PR fixes the logic for generating VLESS/VMESS nodes as follows:

• When network is tcp, check the header.type field:
  • If header.type is empty, none, or tcp, set network to tcp
  • If header.type is http, set network to http and add the http-opts field
• Other protocol logic remains unchanged
  This change ensures that the generated node templates are compatible with the latest Stash rules, supporting both TCP and HTTP disguise scenarios.