feat(ui): component redesign pass and fixes, release ui 0.8.87

Redesign
- Shared field foundation rules (duplicated across 15 form components and
  emitted globally) are now identical everywhere, so later copies no longer
  silently override earlier redesigns.
- Drawn checkbox and radio controls, white switch thumbs (the thumb was the
  text colour, a black blob in light mode), recessed field wells, keycap
  actions in Modal, Drawer, Popover, Toaster, Pagination, Stepper, DataTable.
- Menus (Dropdown, ContextMenu, Popover, Select dropdown, Navbar panels) share
  one flat raised panel with neutral hover rows and mono section labels.
- Alerts with an accent rail and icon chip; card headers without the grey
  band; accordion, collapse, list, list group, timeline, stats, metrics,
  chat, skeleton, avatar group, clipboard, splitter, section, sidebar,
  navbar and upload progress restyled.
- Chart rebuilt: nice y-axis ticks, gridlines, rounded bars, line and area
  modes, hover tooltips, hidden series leave the scale.

Fixes
- Checkbox and radio labels toggle their input again (empty for="" broke it).
- TimePicker kept every clicked time pressed; only the chosen hour and
  minute are pressed now, and nothing is pressed before a value exists.
- ColorPicker hex readout now follows the picked colour.
- Disabled FileInput no longer shows the native file-input text.
- Date and time panels float instead of pushing content.
- ContextMenu opened at the pointer closes on scroll.
- Drawer left/top/bottom placements slide from their own edge again.
- Image-only Card no longer renders an empty body strip.
- Timeline supports item.time, current/upcoming states, sizes and
  compact/alternate variants; showcase demos use distinct variants.
- ChatBubble: delivery receipts (sending/sent/delivered/read/failed/error)
  and meta aligned to its bubble.

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

packages/ui/components/Accordion.wrn

@@ -229,15 +229,17 @@ component Accordion {
       width: 100%;
       align-items: center;
       gap: 0.75rem;
-      padding: 0.85rem 0;
+      padding: 0.9rem 0;
       border: 0;
       background: transparent;
       color: var(--wrn-color-text);
       font: inherit;
-      font-size: 0.88rem;
+      font-size: 0.9rem;
       font-weight: 600;
+      letter-spacing: -0.008em;
       text-align: left;
       cursor: pointer;
+      transition: color 120ms ease;
     }
 
     .wrn-next__accordion-heading > button > span:not(.wrn-next__accordion-indicator) {
@@ -286,7 +288,7 @@ component Accordion {
     .wrn-next__accordion-item[data-open="true"]
       > .wrn-next__accordion-heading
       .wrn-next__accordion-indicator {
-      color: var(--wrn-accordion-accent);
+      color: var(--wrn-color-text);
       transform: rotate(45deg);
     }
 
@@ -298,7 +300,7 @@ component Accordion {
     }
 
     .wrn-next__accordion-item[data-open="true"] > .wrn-next__accordion-heading > button {
-      color: var(--wrn-accordion-accent);
+      color: var(--wrn-color-text);
     }
 
     .wrn-next__accordion-panel {
@@ -321,9 +323,10 @@ component Accordion {
 
     .wrn-next__accordion-content {
       padding: 0 0 1rem;
-      color: var(--wrn-color-muted);
-      font-size: 0.86rem;
+      color: var(--wrn-color-text-muted, var(--wrn-color-muted));
+      font-size: 0.875rem;
       line-height: 1.65;
+      max-width: 68ch;
     }
 
     .wrn-next--accordion[data-indicator-position="start"] .wrn-next__accordion-content {
@@ -350,8 +353,9 @@ component Accordion {
     .wrn-next--accordion-bordered {
       overflow: hidden;
       border: 1px solid var(--wrn-color-border);
-      border-radius: var(--wrn-radius-md);
+      border-radius: var(--wrn-radius);
       background: var(--wrn-color-surface);
+      box-shadow: var(--wrn-shadow-1);
     }
 
     .wrn-next--accordion-bordered > .wrn-next__accordion-item + .wrn-next__accordion-item {
@@ -380,13 +384,16 @@ component Accordion {
 
     .wrn-next--accordion-separated > .wrn-next__accordion-item {
       overflow: hidden;
-      border: 1px solid transparent;
-      border-radius: var(--wrn-radius-md);
-      background: var(--wrn-color-surface-2);
+      border: 1px solid var(--wrn-color-border);
+      border-radius: var(--wrn-radius);
+      background: var(--wrn-color-surface);
+      box-shadow: var(--wrn-shadow-1);
+      transition: box-shadow 160ms ease, border-color 160ms ease;
     }
 
     .wrn-next--accordion-separated > .wrn-next__accordion-item[data-open="true"] {
-      border-color: var(--wrn-color-border);
+      border-color: var(--wrn-color-border-strong, var(--wrn-color-border));
+      box-shadow: var(--wrn-shadow-2);
     }
 
     .wrn-next--accordion-separated
@@ -478,7 +485,7 @@ component Accordion {
 
         .wrn-component p {
           margin: 0;
-          color: var(--wrn-color-muted);
+          color: var(--wrn-color-text-muted, var(--wrn-color-muted));
           line-height: 1.6;
         }
   }