fix(node): pin utf-8 (and LF) on every text file the node reads or writes

node.toml, the keystore envelope, the unlock key, the loopback UI token,
pairing/invite code files and the denylist were all read and written with
the platform default encoding and newline translation. On Windows that is
cp1252 + CRLF: a node.toml or keystore holding any non-ASCII byte failed to
load, and ops.py's line-based node.toml editor round-tripped CRLF in and
LF out.

Every read is now `encoding="utf-8"`; every write is `encoding="utf-8",
newline="\n"` so the files stay LF whatever the OS. No-op where the locale
was already UTF-8.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/packages/meshbay-node/src/meshbay_node/transport/quic_server.py b/packages/meshbay-node/src/meshbay_node/transport/quic_server.py
index 95fccf1..360b9ac 100644
--- a/packages/meshbay-node/src/meshbay_node/transport/quic_server.py
+++ b/packages/meshbay-node/src/meshbay_node/transport/quic_server.py
@@ -144,7 +144,7 @@ class Denylist:
             return
         try:
             import json
-            data = json.loads(self._path.read_text())
+            data = json.loads(self._path.read_text(encoding="utf-8"))
             self.user_ids = set(data.get("users", []))
             self.group_ids = set(data.get("groups", []))
             self.jtis = set(data.get("jtis", []))
@@ -163,7 +163,7 @@ class Denylist:
                 "users": sorted(self.user_ids),
                 "groups": sorted(self.group_ids),
                 "jtis": sorted(self.jtis),
-            }))
+            }), encoding="utf-8", newline="\n")
         except Exception as e:
             log.warning("Could not persist denylist to %s: %s", self._path, e)