feat(mqlaunch): living frame — health-tinted panel, Pulse chip, sparklines - #228

...lines
The launcher surface was static text: the frame and the MEM/BAT numbers
looked the same whether the machine was fine or not. Now the last Pulse
verdict drives the picture.
- surface_panel_color tints the panel border (yellow WARN/INCOMPLETE,
 red FAIL) from the cached mq.pulse.v1 document; PASS, no run, a stale
 run (> MQ_HEALTH_MAX_AGE, default 1h) or MQ_PANEL_HEALTH_TINT=0 keep
 the theme colour. It reads a file — never runs a collector.
- The dashboard header shows `PULSE: WARN 12m ago` in place of the static
 "adaptive layout active" text, and the rule under the logo follows the
 same colour.
- MEM and BAT carry braille sparklines (⣀⣄⣤⣶⣷⣿): up to 12 readings kept
 under ~/.cache/macos-scripts/spark-<metric>, appended at most every
 MQ_SPARK_INTERVAL seconds (30) so the line is a trend, not one moment.
 MQ_SPARKLINES=0 turns them off. Plain UTF-8, so NO_COLOR and piped
 output carry the same glyphs.
Two zsh defects found on the first live run, both in mq-ui.sh which the
zsh launcher sources: `local path` shadowed the array tied to PATH and
emptied it for the rest of the call (cksum, cut: command not found), and
`status=` assigns to zsh's read-only alias of $?. Renamed to cache_path
and verdict. tests/ui-zsh-surface-smoke.sh sources the library under
zsh with a Pulse fixture and asserts the verdict, an intact PATH, the
tinted frame and a silent stderr; it fails on both original bugs.
Also: mtime via `stat -c %Y || stat -f %m` (GNU first — on GNU stat -f
is filesystem status and succeeds with a report), and the overall status
is taken with `head -n 1` so a single-line document does not also match
an item's status. panel-color-smoke pins MQ_PULSE_CACHE to a missing
file so it tests the theme plumbing, not this machine's last Pulse.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XPB297VJQ4zSEY32wSVAEh