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/app/pages/index.wrn

@@ -17,11 +17,11 @@ page ComponentShowcase {
       <section class="home-product-grid"><article><span class="icon-[lucide--component] size-7"></span><strong>84 components</strong><p>Accessible primitives for every product surface.</p><a href="/base">Browse components →</a></article><article><span class="icon-[lucide--layout-template] size-7"></span><strong>Ready-made blocks</strong><p>Composable sections assembled from WRNexus UI.</p><a href="/block-library">Explore blocks →</a></article><article><span class="icon-[lucide--panels-top-left] size-7"></span><strong>Page templates</strong><p>Complete responsive pages ready to customize.</p><a href="/templates">View templates →</a></article></section>
       <section class="showcase-stats">
         <div class="showcase-stat"><strong>84</strong><span>Unique components</span></div>
-        <div class="showcase-stat"><strong>345</strong><span>Live configurations</span></div>
+        <div class="showcase-stat"><strong>346</strong><span>Live configurations</span></div>
         <div class="showcase-stat"><strong>0</strong><span>Duplicate implementations</span></div>
         <div class="showcase-stat"><strong>11</strong><span>Focused categories</span></div>
       </section>
-      <section class="home-categories"><div class="home-section-heading"><span>Explore the system</span><h2>Everything your product needs</h2></div><div class="home-category-grid"><a class="home-category home-category--1" href="/base"><span class="home-category-index">01</span><div><strong>Base</strong><p>26 components · 85 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--2" href="/core"><span class="home-category-index">02</span><div><strong>Core</strong><p>2 components · 4 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--3" href="/data"><span class="home-category-index">03</span><div><strong>Data</strong><p>1 components · 3 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--4" href="/forms"><span class="home-category-index">04</span><div><strong>Forms</strong><p>12 components · 32 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--1" href="/integrations"><span class="home-category-index">05</span><div><strong>Integrations</strong><p>7 components · 19 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--2" href="/layout"><span class="home-category-index">06</span><div><strong>Layout</strong><p>11 components · 31 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--3" href="/marketing"><span class="home-category-index">07</span><div><strong>Marketing</strong><p>1 components · 3 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--4" href="/navigation"><span class="home-category-index">08</span><div><strong>Navigation</strong><p>10 components · 30 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--1" href="/overlays"><span class="home-category-index">09</span><div><strong>Overlays</strong><p>6 components · 20 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--2" href="/tables"><span class="home-category-index">010</span><div><strong>Tables</strong><p>1 components · 9 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--3" href="/advanced-forms"><span class="home-category-index">011</span><div><strong>Advanced Forms</strong><p>7 components · 109 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a></div></section>
+      <section class="home-categories"><div class="home-section-heading"><span>Explore the system</span><h2>Everything your product needs</h2></div><div class="home-category-grid"><a class="home-category home-category--1" href="/base"><span class="home-category-index">01</span><div><strong>Base</strong><p>26 components · 85 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--2" href="/core"><span class="home-category-index">02</span><div><strong>Core</strong><p>2 components · 4 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--3" href="/data"><span class="home-category-index">03</span><div><strong>Data</strong><p>1 components · 3 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--4" href="/forms"><span class="home-category-index">04</span><div><strong>Forms</strong><p>12 components · 32 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--1" href="/integrations"><span class="home-category-index">05</span><div><strong>Integrations</strong><p>7 components · 19 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--2" href="/layout"><span class="home-category-index">06</span><div><strong>Layout</strong><p>11 components · 31 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--3" href="/marketing"><span class="home-category-index">07</span><div><strong>Marketing</strong><p>1 components · 3 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--4" href="/navigation"><span class="home-category-index">08</span><div><strong>Navigation</strong><p>10 components · 30 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--1" href="/overlays"><span class="home-category-index">09</span><div><strong>Overlays</strong><p>6 components · 21 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--2" href="/tables"><span class="home-category-index">010</span><div><strong>Tables</strong><p>1 components · 9 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a><a class="home-category home-category--3" href="/advanced-forms"><span class="home-category-index">011</span><div><strong>Advanced Forms</strong><p>7 components · 109 live demos</p></div><span class="icon-[lucide--arrow-up-right] size-5" aria-hidden="true"></span></a></div></section>
     </div>
   }
 }