Per-client chat is sent to every connected client in a loop.
Capture chat/tchat commands regardless of target clientNum, and
deduplicate by checking if the exact string is already buffered
for the current frame.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Chat messages use per-client trap_SendServerCommand (not broadcast),
so they weren't captured. Move capture hook to SV_GameSendServerCommand
which is the game module boundary. Capture broadcasts (clientNum=-1)
and chat/tchat commands sent to client 0 (first in the per-client
loop, deduplicated by only capturing once).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
