PERF.71 Code: eight app mains are one closure of 2,500 to 5,800 lines each; split by topic

The AST pass over 5,500 modules (204,968 functions) found each app's main a single init closure: bimcraft init 5,759 lines with 1,557 nested functions, markupcraft 4,755, takeoffcraft 4,509, modelcraft 3,858, partcraft 3,770, cadcraft 2,898, civilcraft 2,848, detailcraft start 2,478. Everything inside shares one scope, so nothing can be dynamically imported (the start-up row), tested alone or reasoned about; this is the single biggest piece of sloppy structure the owner asked about. The report (docs/0.9-sessions/perf-wave3/code-quality.md Q1) outlines each by its inner functions and proposes modules per topic (BimCraft: IFC open/save, fd, QTO, find, clash, props, nine context modules; the same per app). L per app, M for CadCraft; one app per lab pass, behind the existing browser tests (tools/<app>-test, bin/test-<app>*.mjs).