docs(sw): AI rules, example E, tests and evidence for the popup / footer / header changes

AI documents (packages/sw/ai)
- SWPopupPropertyRow, SWSelect, SWSlider in the catalog, usage table,
  composition patterns and design rules; SWViewerSlider noted as SWSlider panel.
- Rule: the SWHeader layer / color dropdowns are header-only; popup layer /
  color / line style use SWPopupPropertyRow (property window pickers).
- Footer rules: gra-border-orange surfaces, Model / Layout text unchanged on
  hover, side button hover, vacant surface limited to the slot row.
- Header rules: measured More growing behavior (hysteresis fix A).
- Example E (custom popup) uses SWPopupPropertyRow, SWSelect and SWSlider
  instead of SWHeaderLayerMenu in the popup.

Tests (packages/sw/tests)
- New footer-popup-viewer-refinement.browser.mjs (47 checks: footer stories,
  hover / gradient / tab text / pocket, popup pickers vs property window rows,
  SWSlider, unit SWSelect parity, Popup B, header trace, viewer title art).
- integrated-popup / integrated-consumer: popup pickers and SWSelect instead of
  the header dropdown and the HM UI Select (same overlay / callback / Escape
  requirements).
- integrated-improvement: default sections skip the retired SW/Tool story
  ('tool' still runs by name); storybook-inventory / simplification record the
  retired footer IDs; theme-inheritance widths use sw-footer--full-footer.

Docs (docs/sw)
- sw-footer-popup-viewer-refinement-2026-10-20.md: causes, decisions (the
  first-pass "header dropdown in popup" change is marked withdrawn),
  verification and baseline failures; evidence footer-popup-viewer-refinement-qa
  (47/47). Footer mapping document updated for the removed sections.

Baseline failures (unchanged by this work): home-menu-integration 1,
storybook-unused-removal 5 (10-19 snapshot comparisons), range-cross-browser and
property-panel-comparison open stories retired on 2026-10-19.

packages/sw/tests/integrated-consumer.browser.mjs

@@ -103,11 +103,15 @@ for (const mode of ["sw-first", "ui-first"]) {
   const name = e.getByLabel("이름")
   await name.click(); await name.fill("평면도-02"); await name.press("Enter")
   check(`${mode} E: row input commits`, await last() === "name:평면도-02", await last())
-  await e.locator(".hm-sw-header__field--layer").click()
-  const menu = e.locator(".hm-sw-header__layer-menu")
-  check(`${mode} E: layer dropdown inside the popup is a fixed overlay`, await menu.evaluate(el => getComputedStyle(el).position) === "fixed")
+  // 2026-10-20: popup layer = the property window picker (SWPopupPropertyRow); no SWHeader field dropdown in a popup.
+  check(`${mode} E: no SWHeader field dropdown inside the popup`, await e.locator(".hm-sw-header__field").count() === 0)
+  await e.locator('[data-property-id="layer"] .hm-sw-property__trigger').click()
+  const menu = page.locator('.hm-sw-property__drop[data-picker="layer"]')
+  check(`${mode} E: layer picker inside the popup is a fixed overlay`, await menu.evaluate(el => getComputedStyle(el).position) === "fixed")
   await menu.locator(".hm-sw-header__layer-item", { hasText: "DIM" }).click()
   check(`${mode} E: layer selection callback`, await last() === "layer:dim", await last())
+  await e.getByLabel("단위").selectOption("cm")
+  check(`${mode} E: SWSelect unit callback`, await last() === "unit:cm", await last())
 
   // HM UI inside an SW popup.
   const ui = section("ui")