Remove glows, refine feature legend, forms, and showcase pages

- Delete glows.css and GlowsPage (unused)
- Enhance DTFeatureLegend and feature-legend.css with improved layout
- Update DTRadioGroup styling
- Refine bevels.css, forms-dt.css
- Update AnimationsPage, CardsAdvancedPage, FormsPage, HomePage
- Add type:module to web package.json

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/web/src/components/forms-dt.css

@@ -143,49 +143,38 @@
 /* ============================================================================
    Radio Button — Hexagonal indicator
    Matches RN DTRadioGroup: outlined hexagon with inner filled dot on check.
-   Outer hexagon is always stroked (accent border); inner dot appears on check.
+   Uses a custom span (.dt-radio-hex) since ::before on <input> is unreliable.
    ============================================================================ */
-[data-brand="dt"] input[type="radio"] {
-  appearance: none;
-  -webkit-appearance: none;
-  display: grid;
-  place-content: center;
+[data-brand="dt"] .dt-radio-hex {
+  position: relative;
+  display: inline-block;
   width: 22px;
   height: 22px;
   flex-shrink: 0;
-  margin: 0;
-  border: none;
   background: var(--color-primary);
-  cursor: pointer;
   clip-path: polygon(
     50% 0%, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%
   );
   transition: background var(--transition-fast);
 }
 
-/* Inner surface — creates the outlined hexagon look (accent border + transparent center) */
-[data-brand="dt"] input[type="radio"]::before {
-  content: '';
+/* Inner surface — outlined hexagon look (accent border + dark center) */
+[data-brand="dt"] .dt-radio-hex-inner {
   position: absolute;
   inset: 2px;
   background: var(--color-bg);
   clip-path: polygon(
     50% 0%, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%
   );
-  transition: background var(--transition-fast);
+  transition: all var(--transition-fast);
 }
 
-/* Checked: inner dot fills with accent color (smaller inset for the dot effect) */
-[data-brand="dt"] input[type="radio"]:checked::before {
+/* Checked: inner dot fills with accent color (smaller inset) */
+[data-brand="dt"] .dt-radio-hex.checked .dt-radio-hex-inner {
   inset: 5px;
   background: var(--color-primary);
 }
 
-[data-brand="dt"] input[type="radio"]:disabled {
-  opacity: 0.5;
-  cursor: not-allowed;
-}
-
 /* Radio group option container */
 .dt-radio-option {
   display: flex;
@@ -403,11 +392,6 @@
   animation: dt-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
 }
 
-/* Nested level indentation */
-.dt-menu-item[style*="--dt-menu-level"] {
-  padding-left: calc(0.75rem + var(--dt-menu-level, 0) * 1rem);
-}
-
 /* Classic brand: rounded, thinner borders */
 [data-brand="classic"] .dt-menu-item {
   border-top-width: 2px;