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layer
Client.Send now speaks nym-client's native binary websocket protocol
(tag || recipient || conn_id || data_len || data) instead of wrapping
the ciphertext in a JSON text message, which required base64-encoding
it a second time on top of the browser's own base64 layer.
The reader's self-address query also switched to the binary protocol:
nym-client picks text-vs-binary for every later "received" push based
on the format of the last request seen on a connection, so leaving the
reader in JSON/text mode would have made nym-client run a lossy UTF-8
conversion over the now-unencoded binary payload, corrupting it. Fixed
the binary Received-frame parsing along the way (previous code assumed
a fixed 16-byte tag with no length prefix, which never matched the real
protocol and was never exercised while the connection stayed text-mode).
Verified end-to-end against the real embedded nym-client 1.1.76 binary,
with the exact wire format cross-checked against upstream nym source at
the pinned build commit.
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Reader now keeps the private key bytes and the per-submission ECDH/HKDF
secrets in memguard.LockedBuffer (mlock + guaranteed wipe) instead of a
manual zero loop. Added a regression test for the decrypt path.
Message field gets a self-hosted Markdown toggle preview (no external
library): headers, bold/italic, inline code, code blocks, blockquotes,
lists, links. Output is HTML-escaped and link schemes are whitelisted
before rendering. Submitted content is still the raw Markdown source,
unchanged on the wire.
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