feat(words): border-light chrome restyle (declutter)

The editor read as "poor" largely from border clutter — hairlines
everywhere. Strip incidental borders and let tonal surfaces + spacing
carry the structure:

- Toolbar: drop the bottom hairline (its surface tone separates it).
- Drawer: drop the seam line (both sides) — tonal separation only.
- Drawer panels: drop inter-panel divider lines (scope accent + spacing).
- Code block: drop the outline — the overlay surface fill defines it.
- Table: no outer box, no vertical lines — light horizontal row rules
  only + airier cells.
- Drawer insert items: borderless soft tonal tiles (hover deepens with
  the accent) instead of bordered boxes.

Kept the intentional lines (quote accent bar, the silver margin rule).
Verified in browser: no console errors; table is horizontal-rule-only,
insert tiles borderless.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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

@@ -187,7 +187,8 @@
 	block-size: 100%;
 	min-block-size: 100%;
 	padding: 0;
-	border-inline-start: var(--words-border-width) solid var(--words-toolbar-border);
+	/* Border-light: no seam line — the drawer's surface tone separates
+	   it from the raised content. */
 	background: var(--words-toolbar-bg);
 	color: var(--words-command-color);
 	font-size: var(--words-status-font-size);
@@ -195,13 +196,6 @@
 	transition: inline-size 160ms ease;
 }
 
-/* Left-side drawer: the visual seam goes on the inline-end edge
-   (toward the editor content) instead of inline-start. */
-[data-words-drawer][data-side='left'] {
-	border-inline-start: 0;
-	border-inline-end: var(--words-border-width) solid var(--words-toolbar-border);
-}
-
 [data-words-drawer]:not([data-open]) {
 	inline-size: 2.25rem;
 	max-inline-size: 2.25rem;
@@ -283,10 +277,12 @@
 	display: inline-flex;
 	align-items: center;
 	gap: 0.5rem;
-	padding: 0.45rem 0.55rem;
-	border: var(--words-border-width) solid var(--words-toolbar-border);
+	padding: 0.5rem 0.6rem;
+	/* Border-light: soft tonal tiles, no outline. The faint fill lifts
+	   them off the drawer surface; hover deepens with the accent. */
+	border: 0;
 	border-radius: var(--words-command-radius);
-	background: var(--words-toolbar-bg);
+	background: color-mix(in srgb, var(--words-command-color) 6%, transparent);
 	color: var(--words-command-color);
 	font: inherit;
 	font-size: var(--words-font-size-sm);
@@ -294,13 +290,11 @@
 	text-align: start;
 	transition:
 		background-color 120ms ease,
-		border-color 120ms ease,
 		color 120ms ease;
 }
 
 [data-words-drawer-insert-item]:hover {
-	border-color: var(--_words-accent-border);
-	background: color-mix(in srgb, var(--_words-accent-solid) 8%, transparent);
+	background: color-mix(in srgb, var(--_words-accent-solid) 14%, transparent);
 	color: var(--_words-accent-text);
 }
 
@@ -356,12 +350,8 @@
 [data-words-drawer-panel] {
 	display: flex;
 	flex-direction: column;
-	border-block-end: var(--words-border-width) solid
-		color-mix(in srgb, var(--words-toolbar-border) 60%, transparent);
-}
-
-[data-words-drawer-panel]:last-child {
-	border-block-end: 0;
+	/* Border-light: panels are separated by the scope-accent edge +
+	   spacing, not a grey divider hairline. */
 }
 
 [data-words-drawer-panel-header] {
@@ -1105,7 +1095,8 @@
 	padding-block: var(--_words-toolbar-py);
 	padding-inline: var(--_words-toolbar-px);
 	border: 0;
-	border-block-end: var(--words-border-width) solid var(--words-toolbar-border);
+	/* Border-light: no bottom hairline — the toolbar's own surface tone
+	   (surface-default vs the raised content) separates it. */
 	border-radius: 0;
 	background: var(--words-toolbar-bg);
 	box-shadow: none;
@@ -1886,8 +1877,8 @@
 	overflow-x: auto;
 	padding-block: calc(var(--words-quote-px) * 1.25);
 	padding-inline: calc(var(--words-quote-px) * 1.25);
-	border: var(--words-border-width) solid
-		color-mix(in srgb, var(--_words-accent-border) 60%, var(--words-toolbar-border));
+	/* Border-light: the overlay surface fill defines the code block,
+	   no outline. */
 	border-radius: var(--words-code-radius);
 	background: var(--words-code-bg);
 	color: var(--words-code-color);
@@ -1974,16 +1965,21 @@
 	border-collapse: collapse;
 	table-layout: fixed;
 	overflow: hidden;
-	border: var(--words-border-width) solid var(--words-toolbar-border);
+	/* Border-light: no outer box. Structure comes from the header tint +
+	   light horizontal row rules + cell padding. */
 	border-radius: var(--words-code-radius);
 	background: var(--words-bg);
 }
 
 [data-words-content] :where(td, th) {
 	min-inline-size: calc(var(--_words-button-size) * 2);
-	padding-block: var(--words-code-py);
-	padding-inline: var(--words-command-px);
-	border: var(--words-border-width) solid var(--words-toolbar-border);
+	/* Airier cells — space carries the grid now that the lines are gone. */
+	padding-block: var(--space-1-5);
+	padding-inline: var(--space-3);
+	/* Border-light: a single light horizontal row rule, no verticals. */
+	border: 0;
+	border-block-end: var(--words-border-width) solid
+		color-mix(in srgb, var(--words-toolbar-border) 55%, transparent);
 	vertical-align: top;
 	transition: background-color 120ms ease;
 }