test(sw): align legacy storybook suites and add header composition fixture

- dropdown-consolidation, storybook-cleanup-stage1, detail-buttons, property-panel-comparison: assert their recorded
  state and accept today only the approved later Story changes (storybook-inventory.mjs helpers).
- header-composition.browser.mjs + fixtures/header-composition.tsx: the removed Composition Story presets, hidden
  controls, invalid menuOrder / hiddenControls and live changes, on a test-only page using the public API only.
- storybook-unused-removal: header comment lists which older scripts run on current Stories again.

packages/sw/tests/storybook-unused-removal.browser.mjs

@@ -1,7 +1,8 @@
 // Current regression after removing nine unused SW Header demo pages (2026-10-19, 19 -> 10 SW Stories).
 // Build Storybook first. Usage: node packages/sw/tests/storybook-unused-removal.browser.mjs [evidence-dir]
-// Older scripts that open the retired IDs (detail-buttons preservation/verify, followup-four, property-close,
-// property-fields, property-panel-comparison verify, storybook-cleanup-stage1) are historical evidence for their runs.
+// Older scripts that open the retired IDs (followup-four, property-close, property-fields, detail-buttons
+// composition-history, property-panel-comparison before) are historical evidence for their runs. Since 2026-10-20
+// detail-buttons, property-panel-comparison verify and storybook-cleanup-stage1 run on current public Stories again.
 import { mkdir, readFile, writeFile } from 'node:fs/promises'
 import { execFileSync } from 'node:child_process'
 import path from 'node:path'