feat(sw): implement property field interaction variants

- Property panel rows follow Figma 26:12388 ~ 26:12649: 28px fields with
  Default / Hover border / numeric editing On (#0F0D0A) / dropdown On (#211D13)
- Layer, line style and color fields open the shared header dropdown contents
  (SWHeaderLayerRows, SWHeaderLineStyleColumns, SWHeaderColorPanelBody)
- Additive API: property.picker, property.decimals, panel menus
- Property Fields story and browser test (77 checks)

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

src/sw/sw-stories.css

@@ -48,3 +48,6 @@
 .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; }