[Feature]: Add remote support

[shao-hua-li]

Area

Discovery or pairing

User problem

I developed a somewhat similar product here https://github.com/llmbeam/llmbeam
I used tailcat to connect my server to my phone/laptop. I wonder if Personal-AI-Router can support the remote connection feature. If not, one thing I can do is to treat Personal-AI-Router as one backend of llmbeam

Desired outcome

support something like --remote

Alternatives considered

No response

Compatibility and security implications

No response

Validation approach

No response

Confirmations

• I searched existing issues for duplicates.
• I agree to follow the Code of Conduct.

[CryptoJones]

Cross-linking PR #38 because it may address one important part of this request.

#38 does not implement a --remote mode, tunneling, NAT traversal, or a tailcat-style transport. What it does add is a supported opt-in way for a non-loopback client to reach a PAIR compatibility endpoint with an API key, plus an optional source CIDR allowlist.

That means a remote/tunnel layer such as llmbeam could treat PAIR as a backend without needing to run a loopback relay beside PAIR. In other words, #38 covers the “PAIR can be safely used from outside the node” piece, while the actual remote transport remains separate work.