The app was crashing with FRAME_SIZE_ERROR because the gRPC client
was using plaintext mode when connecting to port 443 (TLS endpoint).
This caused the client to receive encrypted data that it couldn't parse.
Fix: Use useTransportSecurity() for port 443, usePlaintext() for other ports.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
hailin
06e374e747
