feat(shell): statistics command, overlay wiring and palette row

[efirvida]

Chain Context

Field	Value
Chain	per-session statistics module (upstream Gentleman-Programming#1583)
Tracker	upstream/statistics-tracker → upstream integration PR Gentleman-Programming#1627 (draft)
Position	20 of 27
Base	upstream/statistics-19-overlay-view
Depends on	#47
Follow-up	upstream/statistics-20-statistics-command (slice 21)
Review budget	214 / 400
Starts at	upstream/statistics-19-overlay-view
Ends with	feat(shell): statistics command, overlay wiring and palette row

Chain Overview

upstream/main
 └── upstream/statistics-tracker (root, integration PR #1627)
      └── … slices 1..19 … (##47 is the immediate parent)
           └── 📍 upstream/statistics-20-statistics-command
                └── … slices 21..27 …

Scope

• Includes: feat(shell): statistics command, overlay wiring and palette row
• Excludes: every other slice. A polluted diff against upstream/statistics-19-overlay-view is a branching bug, not a scope surprise.

Verification

Focused and affected suites are green on this slice; tests and docs for this unit ship with it.