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/LegendIndicator.wrn

@@ -32,8 +32,27 @@ component LegendIndicator {
     .wrn-legend { display:grid; gap:.65rem; }
     .wrn-legend p { margin:0; color:var(--wrn-color-muted); }
     .wrn-legend__items { display:flex; flex-wrap:wrap; gap:.75rem; }
-    .wrn-legend button { display:flex; align-items:center; gap:.4rem; border:0; background:transparent; color:var(--wrn-color-text); font:inherit; font-size:.875rem; cursor:pointer; }
-    .wrn-legend i { width:.65rem; height:.65rem; border-radius:50%; }
+    .wrn-legend button {
+      display: flex;
+      align-items: center;
+      gap: .45rem;
+      padding: 0.25rem 0.5rem;
+      border: 1px solid transparent;
+      border-radius: 999px;
+      background: transparent;
+      color: var(--wrn-color-text);
+      font: inherit;
+      font-size: .8125rem;
+      font-weight: 550;
+      cursor: pointer;
+      transition: background-color 120ms ease, opacity 120ms ease;
+    }
+    .wrn-legend i {
+      width: .625rem;
+      height: .625rem;
+      border-radius: 3px;
+      box-shadow: inset 0 0 0 1px rgb(0 0 0 / 0.1);
+    }
     .wrn-legend button[aria-pressed="false"] { opacity:.45; text-decoration:line-through; }
 
     .wrn-next--legend-indicator {
@@ -44,6 +63,7 @@ component LegendIndicator {
       border-radius: var(--wrn-radius);
       color: var(--wrn-color-text);
       background: var(--wrn-color-surface);
+      box-shadow: var(--wrn-shadow-1);
     }
     .wrn-next--legend-indicator > p { margin: 0; color: var(--wrn-color-muted); }
     .wrn-next--legend-indicator > .wrn-next__items { display: flex; flex-wrap: wrap; gap: 0.5rem; }
@@ -114,7 +134,7 @@ component LegendIndicator {
 
         .wrn-component p {
           margin: 0;
-          color: var(--wrn-color-muted);
+          color: var(--wrn-color-text-muted, var(--wrn-color-muted));
           line-height: 1.6;
         }
   }