The update fixes how total thinking time is calculated during a chat message flow.
Previously the elapsed time from the initial completion was incorrectly added to the
overall thinking time, leading to inflated metrics. The new logic splits the
computation into separate phases (initial completion, tool execution, and
follow‑up completions) and accumulates them into `totalThinkingTime`, ensuring
accurate measurement.
Additionally, translation keys for chat components are now namespaced with
`chat:` to avoid collisions and clearly indicate the context in which they
are used. The diff also removes a stray comment line and keeps metadata
updates consistent across recursive calls.
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