feat(notice): a notice engine behind rows 2 and 3

[lroolle]

What

The advisor was one sentence from one function. It is now readers emitting notices — rank · voice · scope · key · hl · short · long:

proj (main*)      +84/-14 8m $6.72 fabl5[1m][██░░42%] fb[91%] [MAX|@work] 5h[38%@23:00] 7d[55%]
+ fb 91% vs 7d 55% · go op   5h ▂▅█▃▮▯▯▯▯▯ 0.9x  7d ▅▁▂ ▃▅ˍ▃▅ … ▆▆ˍ▂▮▯▯ 0.6x @Wed 09:00
+ fb weekly 91% against 7d 55% · the model caps first, not the account; op sits at 33%, so run it for the bulk

• Row 2 pins the top notice while the condition holds. Row 3 flashes its long form for ~90s after the condition first appears in this session, then disappears. --notice off / STATUSLINE_NOTICE=off.
• Knows which limit binds: fb 91% vs 7d 55% · go op (the model caps before the account — names the roomiest other weekly_scoped limit); 7d rebased 53%→12% (utilization fell inside one window = plan change / out-of-band reset, mutes the learned underuse voice); last 5h of the week; 5h ~40m left only when the week is stranding capacity.
• Shorter: the pin drops what line 1 prints, the 5h strip drops the reset its badge carries, the number you act on is bold.

Bugs found on the way

• Notice records were tab-separated; tab is IFS whitespace, so one empty field shifted every field after it → US (0x1f).
• { printf; [ -f "$f" ] && tail; } > tmp && mv took the group's status from the [ -f ] test, so a first-ever notice was never stamped and the flash never faded.

Verified

• 384 bats + 12 install tests, shellcheck -S error clean
• live: fade observed across renders (pin stays, explanation steps aside for the next fresh story)
• hero SVG + Pages demo rendered in Chrome

🤖 Generated with Claude Code