summary
Major platform restructure session — DIR-S.md + NAV-S.md standards written, PHP directory reorg (10 PHPs to critical/ dirs), backend/.htaccess updated, backend index v7.0, tools index v2.0, sandbox index v2.0, html-debug/critical/ created, page-inventory fixed, font floor D359 locked at 11px, DIR and NAV standards HTML pages live, thread management SOP D357 added to RULES-S.md and all gov files, template-base v1.2 updated.