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fix(ai-chat): tick the live token counter between agent steps (#163) #167

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Ghost wants to merge 1 commits from fix/ai-chat-token-counter-realtime into develop
pull from: fix/ai-chat-token-counter-realtime
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Author SHA1 Message Date
claude code agent 227
21a9c4d89d fix(ai-chat): tick the live token counter between agent steps (#163) 
The header token badge (and the "Thinking… · N tokens" line) froze between
agent steps and jumped in chunks instead of ticking smoothly. liveTurnTokens
returned the authoritative server `usage` VERBATIM as soon as it appeared, but
the server only attaches usage at a step boundary and it is cumulative over
COMPLETED steps — so during the next (in-flight) step the figure stayed frozen
at the previous boundary and the running text estimate was ignored.

Combine both sources per component via max: always compute the running estimate
(chars/≈4 over the message's reasoning/text parts, which includes the in-flight
step) and take max(authoritativeBase, estimate). Between boundaries the estimate
ticks the number up; at a boundary the authoritative figure snaps it exact; and
because the server usage is cumulative and we only ever take the max, the counter
is monotonic (never drops). Reasoning/output stay split; the #151 reasoning-only
authoritative count is preserved.

Backward compatible: in every existing test the estimate is <= the authoritative
figure, so max returns the same value. +4 tests for the in-flight-step-exceeds-
base case (output + reasoning), the authoritative-wins case, and monotonicity.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
 2026-06-24 15:12:21 +03:00