972f9ace0a
Two real bugs found while live-testing the new GET /api/mesh/self
endpoint with two actual jump-host containers (mesh-joined for real,
not mocked):
1. routes/api.js mounted `/` (routes/jump.js, admin-session-gated)
before `/mesh`. Since router.use('/', ...) matches every /api/*
path, EVERY /api/mesh/* request -- including /register, which is
authenticated by a bearer mesh join token, not an admin session --
hit that admin gate first and 401'd before routes/mesh.js ever ran.
Confirmed live: a real gateway-to-gateway /join call failed with a
checkApiToken/LoginFailed error instead of ever reaching /register.
Reordered so /mesh is mounted first.
2. POST /register (the receiving side of a join) persists a `(self)`
registry entry via ensureOwnMeshIndex(), but POST /join (the
initiating side) never did -- so GET /api/mesh/self and the mesh
UI's own-entry handling silently saw nothing on whichever gateway
called /join. Fixed by registering a self-entry there too, using
the exact meshIndex the remote assigned (models/mesh_gateway.js's
register() now accepts an explicit meshIndex instead of always
auto-picking one from the local registry, which has no reason to
agree with what's actually configured on the live wg0 interface).
Verified with two real containers joined over a live network: both
sides now report their own correct mesh IP via GET /api/mesh/self,
and both appear correctly in GET /api/mesh/gateways.