feat(temas/color): group the palette by Radix taxonomy

The 31-scale library was a flat list, so the 6 tinted grays (gray/mauve/slate/
sage/olive/sand) looked like near-duplicates. Group it like Radix: Grises (tinted
neutrals) - Colores - Brillantes (light solids) - Metales, with a fallback "Otros"
bucket so no scale is ever dropped. Intro note explains the grays cluster because
they are near-neutral (chroma ~0.01) with a subtle per-accent hue tint. Verified
in-browser: 31 scales, none dropped/duped, 4 group labels.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/routes/temas/color/+page.svelte

@@ -55,6 +55,34 @@
 	let theme = $state<'light' | 'dark'>('light')
 
 	const SCALE_NAMES = Object.keys(THEME_BASE_LIGHT_COLOR_SCALES)
+
+	// Radix's palette taxonomy — display grouping only (the library itself is flat).
+	// Any scale not listed falls into "Otros" so nothing is ever dropped.
+	const PALETTE_GROUPS: { label: string; names: readonly string[] }[] = [
+		{ label: 'Grises (neutros tintados)', names: ['gray', 'mauve', 'slate', 'sage', 'olive', 'sand'] },
+		{
+			label: 'Colores',
+			names: [
+				'tomato', 'red', 'ruby', 'crimson', 'pink', 'plum', 'purple', 'violet', 'iris',
+				'indigo', 'blue', 'cyan', 'teal', 'jade', 'green', 'grass', 'brown', 'orange'
+			]
+		},
+		{ label: 'Brillantes (sólido claro)', names: ['amber', 'yellow', 'lime', 'mint', 'sky'] },
+		{ label: 'Metales', names: ['gold', 'bronze'] }
+	]
+	const paletteGroups = (() => {
+		const present = new Set(SCALE_NAMES)
+		const used = new Set<string>()
+		const groups = PALETTE_GROUPS.map((g) => {
+			const names = g.names.filter((n) => present.has(n))
+			names.forEach((n) => used.add(n))
+			return { label: g.label, names }
+		}).filter((g) => g.names.length > 0)
+		const leftover = SCALE_NAMES.filter((n) => !used.has(n))
+		if (leftover.length) groups.push({ label: 'Otros', names: leftover })
+		return groups
+	})()
+
 	const ROLES = completeColorRoleMap(THEME_BASE_COLOR_ROLES)
 	const STEPS = COLOR_SCALE_STEPS
 	const SLOTS = COLOR_ROLE_SLOTS
@@ -335,7 +363,9 @@
 					<strong>paso 9</strong>. La paleta la trae el tema; el framework envía estas 31 (valores
 					Radix exactos, listos para autoría OKLCH). Es la <strong>librería fija</strong> de
 					referencia — el seed del builder NO la cambia: deriva los <strong>roles</strong> (arriba),
-					que son escalas generadas nuevas, no miembros de esta lista.
+					que son escalas generadas nuevas, no miembros de esta lista. Agrupada como Radix — los
+					<strong>grises</strong> tintados (gray/mauve/slate/sage/olive/sand) se parecen porque son
+					casi-neutros (croma ~0.01): cada uno con un tinte de hue mínimo para armonizar con su acento.
 				</p>
 			</div>
 			<div class="palette">
@@ -347,7 +377,9 @@
 						{/each}
 					</div>
 				</div>
-				{#each SCALE_NAMES as name}
+				{#each paletteGroups as group}
+					<div class="palette-group-label">{group.label}</div>
+					{#each group.names as name}
 						<div class="scale-row">
 							<span class="scale-name">{name}</span>
 							<div class="swatches">
@@ -362,6 +394,7 @@
 							</div>
 						</div>
 					{/each}
+				{/each}
 			</div>
 		</section>
 
@@ -628,6 +661,13 @@
 		flex-direction: column;
 		gap: 3px;
 	}
+	.palette-group-label {
+		margin-block: var(--space-3) var(--space-1);
+		font-family: var(--font-family-mono, 'Roboto Mono', ui-monospace, monospace);
+		font-size: var(--font-size-xs);
+		font-weight: 600;
+		color: var(--color-content-secondary);
+	}
 	.scale-row {
 		display: flex;
 		align-items: center;