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>

examples/component-showcase/scripts/showcase-profiles.mjs

@@ -1272,7 +1272,7 @@ export const componentProfiles = {
       standard(
         "Standard content section",
         "Create predictable vertical rhythm around a page section.",
-        { id: "standard-section", spacing: "lg", maxWidth: "xl" },
+        { id: "standard-section", spacing: "lg", maxWidth: "xl", variant: "grid" },
         { default: '<div class="showcase-content-block">Standard section content</div>' },
       ),
       compact(
@@ -1290,7 +1290,7 @@ export const componentProfiles = {
           maxWidth: "full",
           borderTop: true,
           borderBottom: true,
-          variant: "raised",
+          variant: "solid",
         },
         { default: '<div class="showcase-content-block">Full-width public page section</div>' },
       ),
@@ -1298,7 +1298,7 @@ export const componentProfiles = {
     options: {
       spacing: ["none", "sm", "md", "lg", "xl"],
       maxWidth: ["compact", "lg", "xl", "wide", "2xl", "full"],
-      variant: ["default", "soft", "raised", "transparent"],
+      variant: ["default", "soft", "raised", "tinted", "solid", "panel", "grid"],
     },
   },
 
@@ -2093,6 +2093,24 @@ export const componentProfiles = {
             '<div class="showcase-overlay-content showcase-overlay-content--tall"><p>Long scrollable content</p><p>Filters, navigation, details, and forms can be composed here.</p></div>',
         },
       ),
+      compact(
+        "Top notice drawer",
+        "Slide a panel down from the top edge for announcements, search, or quick settings.",
+        {
+          open: false,
+          defaultOpen: false,
+          triggerLabel: "Open top drawer",
+          triggerIcon: "icon-[lucide--panel-top-open]",
+          title: "Scheduled maintenance",
+          description: "The workspace will be read-only on Sunday from 02:00 to 03:00 UTC.",
+          placement: "top",
+          size: "sm",
+        },
+        {
+          default:
+            '<div class="showcase-overlay-content"><p>Save your work before the window starts.</p></div>',
+        },
+      ),
     ],
     playground: {
       open: false,
@@ -2822,7 +2840,7 @@ export const componentProfiles = {
             { title: "Document uploaded", time: "3 days ago" },
           ],
           size: "sm",
-          variant: "soft",
+          variant: "compact",
         },
       ),
       advanced(
@@ -2851,11 +2869,11 @@ export const componentProfiles = {
             },
           ],
           size: "lg",
-          variant: "raised",
+          variant: "alternate",
         },
       ),
     ],
-    options: { size: ["sm", "default", "lg"], variant: ["default", "soft", "raised", "outline"] },
+    options: { size: ["sm", "default", "lg"], variant: ["default", "soft", "raised", "outline", "minimal", "compact", "alternate"] },
   },
 
   Typography: {