* Add session.redirect affordance (issue #710)
Route send through session.redirect while a turn is streaming and the prompt
is plain text (no attachments, not a /command); otherwise prompt.submit.
Adds WsMethods.SESSION_REDIRECT + HermesWsClient.sendRedirect. No separate
button — the composer already sends mid-turn, so send just does the redirect.
* fix(chat): capture typing state before sendMessage for redirect
Capture wasStreaming state before updating uiState.isAgentTyping so normal sends call prompt.submit.
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Co-authored-by: M57 <hy4ri@users.noreply.github.com>