v1.9.3: Metric parity and maintainability (2026-08-08)

Added

• Comparison cards, tables, and CSV exports now consume one typed metric-row contract with shared locale/unit presentation and field-level parity tests; filter-control and About provenance DOM ownership is isolated from the main boot orchestrator.

Fixed

• Noncritical About, optional-feed, storage, and offline-diagnostics modules now load lazily so the initial shell stays below the 100 KB gzip budget; the 3D globe owns Escape handling and reliably restores focus to its opener.