* feat(#2161): opt-in absolute token count on the statusline context meter
New statusline.show_context_tokens config (default false). When enabled,
the context meter shows the absolute token total after the percentage,
e.g. "████░░░░░░ 46% (156k)" — summing input, cache-creation, cache-read,
and output tokens from context_window.current_usage (matching /context).
Default output is byte-for-byte unchanged when the flag is absent or
false. The .planning config is now read once per render and shared with
the last-command/position block instead of being re-read.
Claude-Session: https://claude.ai/code/session_01Hme55Pvq6BhpgwBcyC5HAg
* docs(#2161): changeset fragment for PR #2174
* fix(#2161): review fixes — k-to-M threshold, boundary tests, changeset format
- formatTokens promotes to the M branch when k-rounding reaches 1000
(999,500-999,999 rendered "1000k" instead of "1.0M")
- boundary tests at 999499/999500/999999/1000000/1000001
- Number() guards on the four usage fields (silent string-concat gap)
- changeset body ends with the (#2161) citation per house convention
Claude-Session: https://claude.ai/code/session_01Hme55Pvq6BhpgwBcyC5HAg
* fix(#2161): round-2 review fixes — config-set coverage, precision claim, exports style
- config-set accept/reject tests for statusline.show_context_tokens
(mirrors the post-planning-gaps precedent the issue scope names)
- changeset + docs no longer claim parity with /context: the suffix sums
four fields while the meter %% derives from used_percentage (three), so
the figures can diverge slightly
- module.exports one entry per line
Claude-Session: https://claude.ai/code/session_01Hme55Pvq6BhpgwBcyC5HAg
* test: regenerate golden-install-parity fixtures for the statusline hook change
Claude-Session: https://claude.ai/code/session_01Hme55Pvq6BhpgwBcyC5HAg
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Co-authored-by: Tom Boucher <trekkie@nomorestars.com>
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