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/SearchBox.wrn

@@ -86,9 +86,9 @@ component SearchBox {
     .wrn-search-box { width: 100%; }
     .wrn-search-box__label {
       display: block;
-      margin-bottom: 0.5rem;
+      margin-bottom: 0.4rem;
       color: var(--wrn-color-text);
-      font-size: 0.875rem;
+      font-size: 0.8125rem;
       font-weight: 600;
     }
     .wrn-search-box__label[data-hidden="true"] {
@@ -105,22 +105,25 @@ component SearchBox {
     .wrn-search-box__control { position: relative; display: flex; align-items: center; }
     .wrn-search-box__search-icon {
       position: absolute;
-      left: 1rem;
-      width: 1.25rem;
-      height: 1.25rem;
+      left: 0.875rem;
+      width: 1.125rem;
+      height: 1.125rem;
       color: var(--wrn-color-input-placeholder);
       pointer-events: none;
     }
     .wrn-search-box__input {
       width: 100%;
-      height: 3rem;
-      padding: 0 6rem 0 3rem;
+      height: 2.75rem;
+      padding: 0 5.5rem 0 2.5rem;
       border: 1px solid var(--wrn-color-input-border);
-      border-radius: var(--wrn-radius);
+      border-radius: var(--wrn-radius-sm);
       outline: none;
       color: var(--wrn-color-input-text);
       background: var(--wrn-color-input-background);
-      transition: border-color var(--wrn-motion-base) var(--wrn-ease-standard), box-shadow var(--wrn-motion-base) var(--wrn-ease-standard);
+      box-shadow: inset 0 1px 2px rgb(0 0 0 / 0.04);
+      font: inherit;
+      font-size: 0.875rem;
+      transition: border-color var(--wrn-motion-base), box-shadow var(--wrn-motion-base);
     }
     .wrn-search-box__input[data-size="sm"] { height: 2.5rem; }
     .wrn-search-box__input[data-size="lg"] { height: 3.5rem; }
@@ -128,7 +131,7 @@ component SearchBox {
     .wrn-search-box__input:hover { border-color: var(--wrn-color-input-border-hover); }
     .wrn-search-box__input:focus {
       border-color: var(--wrn-color-input-border-focus);
-      box-shadow: 0 0 0 2px var(--wrn-color-focus);
+      box-shadow: 0 0 0 3px color-mix(in srgb, var(--wrn-color-focus) 18%, transparent);
     }
     .wrn-search-box__input:disabled, .wrn-search-box__button:disabled { cursor: not-allowed; opacity: 0.6; }
     .wrn-search-box__button {
@@ -141,9 +144,23 @@ component SearchBox {
       border-radius: var(--wrn-radius-sm);
       transition: color var(--wrn-motion-base), background var(--wrn-motion-base);
     }
-    .wrn-search-box__clear { right: 3rem; width: 2rem; height: 2rem; color: var(--wrn-color-text-muted); background: transparent; }
+    .wrn-search-box__clear {
+      right: 2.75rem;
+      width: 1.75rem;
+      height: 1.75rem;
+      color: var(--wrn-color-text-muted);
+      background: transparent;
+    }
     .wrn-search-box__clear:hover { color: var(--wrn-color-text); background: var(--wrn-color-surface-soft); }
-    .wrn-search-box__submit { right: 0.5rem; width: 2.25rem; height: 2.25rem; color: var(--wrn-color-on-primary); background: var(--wrn-color-primary); }
+    .wrn-search-box__submit {
+      right: 0.375rem;
+      width: 2rem;
+      height: 2rem;
+      color: var(--wrn-color-on-primary);
+      background: linear-gradient(180deg, color-mix(in srgb, var(--wrn-color-primary) 92%, white), var(--wrn-color-primary));
+      border: 1px solid color-mix(in srgb, var(--wrn-color-primary) 82%, black) !important;
+      box-shadow: var(--wrn-highlight-edge, none);
+    }
     .wrn-search-box__submit:hover { background: var(--wrn-color-primary-hover); }
     .wrn-search-box__button:focus-visible { outline: 2px solid var(--wrn-color-focus); outline-offset: 2px; }
     .wrn-search-box__button-icon { width: 1rem; height: 1rem; }