fix(node)!: remove unauthenticated HTTP file API and TCP transport

Phase 11.5.A — findings C1 and C6 (see second-review.md).

C1: the per-group HTTP file API bound 0.0.0.0 for every configured group,
private ones included, and served two endpoints with no authentication at all:
GET /index (full Mesh Group Index) and GET /file/{id} (raw plaintext file via
FileResponse). Anyone able to reach the port — LAN, forwarded port, permissive
IPv6 — read every private file. This bypassed the entire GEK-proof and node
sovereignty layer. Deleted rather than patched: it duplicated MNP without any
of its controls.

C6: the TCP+TLS chunk server accepted a bare JWT with no GEK proof, leaving a
second non-compliant handshake path. Deleted; QUIC remains and will be brought
to parity with WebRTC by the unified handshake in 11.5.4.

Transport decision recorded in transport/__init__.py: WebRTC/ICE is primary for
browser and native clients (the only NAT traversal validated here — 2 ISPs,
IPv4 STUN + IPv6, 4G CGNAT); QUIC is kept for LAN, port-forwarded and hub-less
group:// access. punch_nat() is a direct-connection helper, not a traversal
stack.

Also removed server_ssl_context()/client_ssl_context() from tls_cert.py (no
remaining callers) and a dead import of the former in quic_server.py.
generate_self_signed_cert() stays: QUIC uses it, and the certificate hash is
the intended channel-binding anchor for 11.5.6, since QUIC has no DTLS
fingerprint to bind the GEK proof to.

BREAKING CHANGE: node.toml keys `port` and `http_port` are gone. Regenerate
config with `meshbay-node init`. Env var MESHBAY_PORT -> MESHBAY_QUIC_PORT.

Tests: 198 passed (209 - 7 test_http_server - 4 test_transport). No other test
changed status. Net -1300 lines.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

1 files changed, 1 insertions, 5 deletions

diff --git a/packages/meshbay-node/src/meshbay_node/ui/app.py b/packages/meshbay-node/src/meshbay_node/ui/app.py
index b4885af..31deb66 100644
--- a/packages/meshbay-node/src/meshbay_node/ui/app.py
+++ b/packages/meshbay-node/src/meshbay_node/ui/app.py
@@ -48,7 +48,6 @@ def create_ui_app(state: dict) -> FastAPI:
             "status": state.get("status", "starting"),
             "hub_url": state.get("hub_url", ""),
             "username": state.get("username", ""),
-            "node_port": state.get("node_port", 0),
             "quic_port": state.get("quic_port", 0),
             "endpoint_hint": state.get("endpoint_hint"),
             "group_count": len(groups_ctx),
@@ -154,9 +153,7 @@ def create_ui_app(state: dict) -> FastAPI:
         return {
             "hub_url": config.hub.url,
             "username": config.hub.username,
-            "node_port": config.node.port,
             "quic_port": config.node.quic_port,
-            "http_port": config.node.http_port,
             "ui_port": config.node.ui_port,
             "data_dir": str(config.data_dir),
             "groups": [
@@ -493,8 +490,7 @@ def _render_page(state: dict) -> str:
   <h2>Node Configuration</h2>
   <div class="card">
     <p><b>Hub:</b> {state.get("hub_url", "—")}</p>
-    <p><b>QUIC port:</b> {state.get("quic_port", "—")} &mdash;
-       <b>TCP port:</b> {state.get("node_port", "—")}</p>
+    <p><b>QUIC port:</b> {state.get("quic_port", "—")}</p>
     <p><b>Node ID:</b> <code>{state.get("endpoint_hint") or "—"}</code></p>
   </div>