refactor(storybook): remove unused SW header demo stories

Remove nine SW/Header demo pages (property-fields, property-shape-slot,
composition, colorize, dynamic-controls, property-bar, additional-hover,
property-panel, layer-detail-input) and the demo code and Storybook-only
CSS used only by them. SW Stories 19 -> 10, total 338 -> 329.

The package runtime, public API, AI template and the retained Stories
(Overview, Dropdown, Property Panel 4-state comparison, Window Move
Motion and others) are unchanged. Add a current regression script and
mark the older scripts that open the retired IDs as historical evidence.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/sw/sw-stories.css

@@ -15,33 +15,18 @@
    runtime dropdown still clamps to the real viewport. Scroll the specimen to see its right edge. */
 .sw-story-fixed-dimension .hm-sw-header__list-menu--dimension-style { left: auto !important; right: 0; }
 .sw-story-fixed-dimension .hm-sw-header__list-menu--dimension-style[data-shifted="true"]::before { top: calc(-1 * var(--hm-sw-header-field-height) - 1px); }
-.sw-story-explicit-disabled { min-width: 0; margin: 0; padding: 0; border: 0; }
 .sw-story-log { margin: 0 0 8px; font-size: 13px; color: #3d4a45; }
 .sw-story-stack { display: flex; flex-direction: column; gap: 8px; }
 /* Window Move Motion: window controls alone on the window-area surface, magnified for comparison. */
 .sw-story-window { display: flex; width: 152px; height: 48px; background: var(--hm-sw-header-document-background); }
 .sw-story-zoom { zoom: 3; width: max-content; }
-.sw-story-row { display: flex; flex-wrap: wrap; gap: 24px; }
 .sw-story-stages { display: grid; grid-template-columns: repeat(auto-fill, minmax(480px, 1fr)); gap: 16px; }
 .sw-story-stage { margin: 0; }
 .sw-story-stage figcaption { margin-top: 6px; font-size: 13px; color: #3d4a45; }
-/* Layer Dropdown: room below a standalone layer field for its overlay list. */
-.sw-story-layer-room { padding-bottom: 300px; }
 .sw-story-layer-state { margin: 0 0 8px; font-size: 12px; color: #3d4a45; font-family: ui-monospace, monospace; white-space: pre-wrap; }
-/* Field dropdowns / Dynamic Data: story-only controls and Figma reference images. */
-.sw-story-reference { display: block; max-width: none; image-rendering: pixelated; }
-.sw-story-figma { padding: 12px; background: #27241d; }
-.sw-story-figma .sw-story-reference { zoom: 2; }
-.sw-story-detail { background: var(--hm-sw-header-layer-menu-background); padding: 8px 12px; gap: 12px; }
 .sw-story-dynamic { display: flex; flex-direction: column; gap: 4px; margin-bottom: 8px; }
-.sw-story-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-bottom: 8px; font-size: 12px; color: #3d4a45; }
-.sw-story-controls > strong { min-width: 110px; }
-.sw-story-controls > button { padding: 2px 8px; border: 1px solid #b6c4bf; border-radius: 4px; background: #fff; color: #1f2a26; font-size: 12px; cursor: pointer; }
 .sw-story-property-room { min-height: 820px; }
-/* New responsive scenarios measure the Header at the actual viewport width. */
-.sw-story-followup.sb-page > .sb-page-inner { width: 100%; }
 /* Property panel states (2026-10-16): standalone panels at their natural size; the comparison wraps. */
-.sw-story-property-state { display: inline-block; }
 .sw-story-compare { display: flex; flex-wrap: wrap; align-items: flex-start; gap: 24px; }
 .sw-story-compare__cell { margin: 0; }
 .sw-story-compare__cell figcaption { display: flex; flex-direction: column; gap: 2px; margin-bottom: 8px; font-size: 12px; color: #3d4a45; }
@@ -59,9 +44,6 @@
 .sw-story-detail-comparison { overflow-x: auto; padding: 16px; background: var(--hm-sw-header-layer-menu-background); }
 .sw-story-detail-row { display: grid; grid-template-columns: 140px repeat(4, 180px); align-items: center; gap: 16px; min-width: 924px; padding: 12px 0; }
 .sw-story-detail-row > div { display: flex; align-items: center; gap: 8px; }
-/* Property fields (2026-10-19): Figma node table under the specimens. */
-.sw-story-node-table { margin-top: 16px; border-collapse: collapse; font-size: 12px; color: #3d4a45; }
-.sw-story-node-table :is(th, td) { padding: 4px 10px; border-bottom: 1px solid #d5ddd9; text-align: left; }
 
 /* Overview host layout only. Native controls below are Storybook data controls, outside the product. */
 .sw-story-overview.sb-page { height: 100dvh; min-height: 0; padding-block: 16px; }