T7.5 - A6: the sidebar answers the stand-up question

Use case from the task: someone is asked in a stand-up why a package has not
moved; they open it on a phone and need the answer without scrolling or
clicking. The navigator row now carries:

- a triage line: status - priority - due date - P6 activity, with an em dash
  for anything unset (a placeholder is information; a gap is a question)
- the open-constraint count (already in the state chip; on a held row it moves
  into the hold line so it is never displaced by "on hold")
- the hold reason INLINE, from the newest live entry in data.holds - the modal
  captured it at T7.3, so this is display work, exactly as the task said. A
  held package with no recorded entry (legacy data) says "no reason recorded -
  log it from the status control" rather than rendering an empty red slot.

The row's title attribute keeps its hover summary, but hover stops being the
only path to any of this (C1 - Field View runs on tablets). Triage and reason
lines WRAP instead of ellipsizing - an ellipsis would hide exactly the data
the row exists to show; the reason clamps at three lines so one essay cannot
swallow the panel. Rows align flex-start to take the extra height.

At 390px the panel is the existing overlay drawer; the row fits it with no
sideways overflow and stays a >= 44px tap target.

Verification (each probe run alone): NEW tests/triage_check.py 16/16 covering
the held/plain/legacy row matrix at 1440px and 390px. Regression:
frame_check 39/39.

Items: A6

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/reference/file-map.md

@@ -279,6 +279,7 @@ python tests/frame_check.py          # B7/T7.1/D1 - is the iframe actually gone?
 python tests/form_structure_check.py # F6/D3 - rail, disclosure, one open section 51 checks
 python tests/hold_check.py           # CR-015/A1/D4 - the hold clears, gates hold 50 checks
 python tests/warning_check.py        # A2 - one warning, a badge from anywhere    17 checks
+python tests/triage_check.py         # A6 - the sidebar answers the stand-up      16 checks
 ```
 
 **Three probes were re-pointed at `T7.1`.** `sections_check.py` 5b drove the live