feat(words): text + background colour in the bubble menu

The floating selection menu now carries text + background colour, applied
to the selection like bold/italic. A 'Color' (A) dropdown opens Text +
Background swatch grids; each swatch is a Words.CommandButton whose
color:#hex / bgcolor:#hex command the provider already parses into a
parametric toggleMark on the live selection — reusing the same
range-restoring path the mark buttons use, no bespoke selection wiring.
The 'Default' chip clears the mark (empty value).

- words-bubble.svelte: colour DropdownMenu (Baseline / Highlighter icons),
  9-hue palette + clear, marked data-words-bubble-color.
- words-provider: add [data-words-bubble-color] to the bubble's
  keep-selection-alive closed surface so interacting with the dropdown
  doesn't collapse the model selection.
- words.css: swatch-grid styling (hue from inline --words-swatch; clear
  chip is a diagonal strike).

Verified: selecting a word → A → blue swatch recolours it (rendered
rgb(0,145,255), model carries {type:'color',value:'#0091ff'}); bubble +
selection stay alive so multiple swatches can be applied in a row.

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

src/uix/eidos/components/words/words-bubble.svelte

@@ -32,7 +32,9 @@
 		Link,
 		Unlink,
 		ChevronDown,
-		Check
+		Check,
+		Baseline,
+		Highlighter
 	} from '$uix/eidos/components/icon';
 	import type {
 		ProviderSnippetProps,
@@ -44,10 +46,30 @@
 	let { api }: { api: ProviderSnippetProps } = $props();
 
 	let turnIntoOpen = $state(false);
+	let colorOpen = $state(false);
 	let linkOpen = $state(false);
 	let linkValue = $state('');
 	let linkInput = $state<HTMLInputElement | null>(null);
 
+	// Swatch palette for the bubble's text / background color marks — the
+	// SAME hues the inspector's color rows offer, minus pure white (invisible
+	// as a text color on a light surface; the "Default" chip clears instead).
+	// Each swatch applies via `Words.CommandButton` (command `color:#hex` /
+	// `bgcolor:#hex`) which the provider parses to a parametric `toggleMark`
+	// on the live selection — exactly how bold / italic apply, so a recolor
+	// rides the same range-restoring path with no bespoke wiring.
+	const COLOR_SWATCHES = [
+		'#e5484d',
+		'#f76b15',
+		'#ffc53d',
+		'#46a758',
+		'#0091ff',
+		'#8e4ec6',
+		'#e93d82',
+		'#646a73',
+		'#1a1a1a'
+	] as const;
+
 	// Blocks whose content the engine can reinterpret (setBlock / toggleList
 	// no-op on table / image / divider / callout), so turn-into is disabled
 	// elsewhere instead of offering inert options.
@@ -263,6 +285,72 @@
 
 				<span data-words-bubble-divider></span>
 
+				<!-- Text + background colour. Each swatch is a `Words.CommandButton`
+				     whose `color:#hex` / `bgcolor:#hex` command the provider parses
+				     into a parametric `toggleMark` on the live selection — the same
+				     range-restoring path bold / italic use. The "Default" chip clears
+				     the mark (empty value). The dropdown carries `data-words-bubble-color`
+				     so the bubble's focus scope keeps the selection alive. -->
+				<DropdownMenu bind:open={colorOpen}>
+					<DropdownMenu.Trigger
+						variant="ghost"
+						size="xs"
+						iconOnly
+						aria-label="Text and background colour"
+						data-words-bubble-trigger
+					>
+						{#snippet icon()}<Baseline />{/snippet}
+					</DropdownMenu.Trigger>
+					<DropdownMenu.Content side="bottom" align="start" data-words-bubble-color>
+						<div data-words-bubble-color-section>
+							<span data-words-bubble-color-label><Baseline size="sm" />Text</span>
+							<div data-words-bubble-swatches>
+								<Words.CommandButton command="color:" aria-label="Default text colour">
+									{#snippet child({ props })}
+										<button {...props} type="button" data-words-bubble-swatch data-clear></button>
+									{/snippet}
+								</Words.CommandButton>
+								{#each COLOR_SWATCHES as hex (hex)}
+									<Words.CommandButton command={`color:${hex}`} aria-label={`Text colour ${hex}`}>
+										{#snippet child({ props })}
+											<button
+												{...props}
+												type="button"
+												data-words-bubble-swatch
+												style="--words-swatch: {hex}"
+											></button>
+										{/snippet}
+									</Words.CommandButton>
+								{/each}
+							</div>
+						</div>
+						<div data-words-bubble-color-section>
+							<span data-words-bubble-color-label><Highlighter size="sm" />Background</span>
+							<div data-words-bubble-swatches>
+								<Words.CommandButton command="bgcolor:" aria-label="No background">
+									{#snippet child({ props })}
+										<button {...props} type="button" data-words-bubble-swatch data-clear></button>
+									{/snippet}
+								</Words.CommandButton>
+								{#each COLOR_SWATCHES as hex (hex)}
+									<Words.CommandButton command={`bgcolor:${hex}`} aria-label={`Background colour ${hex}`}>
+										{#snippet child({ props })}
+											<button
+												{...props}
+												type="button"
+												data-words-bubble-swatch
+												style="--words-swatch: {hex}"
+											></button>
+										{/snippet}
+									</Words.CommandButton>
+								{/each}
+							</div>
+						</div>
+					</DropdownMenu.Content>
+				</DropdownMenu>
+
+				<span data-words-bubble-divider></span>
+
 				<Button
 					variant="ghost"
 					size="xs"

src/uix/eidos/components/words/words.css

@@ -223,6 +223,61 @@
 	border-color: var(--words-border-hover);
 }
 
+/* Bubble colour menu — Text + Background swatch grids. The dropdown content
+   carries `data-words-bubble-color`; each `[data-words-bubble-swatch]` paints
+   its hue from the inline `--words-swatch` custom property. */
+[data-words-bubble-color] {
+	display: flex;
+	flex-direction: column;
+	gap: var(--space-2);
+	padding: var(--space-2);
+}
+[data-words-bubble-color-section] {
+	display: flex;
+	flex-direction: column;
+	gap: var(--space-1);
+}
+[data-words-bubble-color-label] {
+	display: inline-flex;
+	align-items: center;
+	gap: 4px;
+	font-size: var(--words-font-size-sm);
+	color: var(--words-command-color);
+	--icon-size: 13px;
+}
+[data-words-bubble-swatches] {
+	display: grid;
+	grid-template-columns: repeat(10, 1fr);
+	gap: 4px;
+}
+[data-words-bubble-swatch] {
+	inline-size: 1.15rem;
+	block-size: 1.15rem;
+	padding: 0;
+	border: 1px solid color-mix(in srgb, var(--words-content-color) 22%, transparent);
+	border-radius: 4px;
+	background: var(--words-swatch, var(--words-bg));
+	cursor: pointer;
+	transition: box-shadow 100ms var(--words-transition-ease, ease);
+}
+[data-words-bubble-swatch]:hover,
+[data-words-bubble-swatch]:focus-visible {
+	outline: none;
+	box-shadow: 0 0 0 2px color-mix(in srgb, var(--_words-accent) 45%, transparent);
+}
+/* "Default / none" chip — a diagonal strike over the surface tone. */
+[data-words-bubble-swatch][data-clear] {
+	background:
+		linear-gradient(
+			to bottom right,
+			transparent calc(50% - 1px),
+			color-mix(in srgb, var(--words-content-color) 45%, transparent) calc(50% - 1px),
+			color-mix(in srgb, var(--words-content-color) 45%, transparent) calc(50% + 1px),
+			transparent calc(50% + 1px)
+		),
+		var(--words-bg);
+}
+
 /* Turn-into menu item — label + trailing active tick. */
 [data-words-bubble-into-item] {
 	display: flex;

src/uix/soma/components/words/words-provider.svelte.ts

@@ -1442,6 +1442,7 @@ export class WordsProvider {
 				'[data-words-block-handle-menu]',
 				'[data-words-block-inserter]',
 				'[data-words-block-inserter-button]',
+				'[data-words-bubble-color]',
 				'[data-words-bubble-menu]',
 				'[data-words-bubble-turn-into]',
 				'[data-words-code-language-panel]',