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/Clipboard.wrn

@@ -82,17 +82,91 @@ component Clipboard {
   }
 
   style {
-    .wrn-clipboard { display: grid; gap: 0.5rem; color: var(--wrn-color-text); }
-    .wrn-clipboard__title { font-size: 0.875rem; }
-    .wrn-clipboard__description { margin: 0; color: var(--wrn-color-muted); font-size: 0.8rem; }
-    .wrn-clipboard__control { display: flex; min-width: 0; align-items: stretch; overflow: hidden; border: 1px solid var(--wrn-color-border); border-radius: var(--wrn-radius); background: var(--wrn-color-surface); box-shadow: var(--wrn-shadow-1); }
-    .wrn-clipboard__value { min-width: 0; flex: 1; overflow: auto; padding: 0.7rem 0.85rem; color: var(--wrn-color-text); background: var(--wrn-color-surface-2); font: inherit; font-family: var(--wrn-font-mono, ui-monospace, monospace); white-space: nowrap; }
-    .wrn-clipboard__button { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.6rem 0.85rem; border: 0; border-left: 1px solid var(--wrn-color-border); color: color-mix(in srgb, var(--wrn-color-primary) 72%, var(--wrn-color-text)); background: transparent; font: inherit; font-size: 0.8rem; font-weight: 700; cursor: pointer; }
-    .wrn-clipboard__button:hover { background: var(--wrn-color-primary-soft); }
-    .wrn-clipboard__button:focus-visible { outline: 2px solid var(--wrn-color-focus); outline-offset: -3px; }
-    .wrn-clipboard__button:disabled { cursor: not-allowed; opacity: 0.55; }
-    .wrn-clipboard[data-status="success"] .wrn-clipboard__button { color: var(--wrn-color-success); }
-    .wrn-clipboard[data-status="error"] .wrn-clipboard__button { color: var(--wrn-color-danger); }
-    .wrn-clipboard__icon { width: 1rem; height: 1rem; flex: none; }
+    .wrn-clipboard { display: grid; gap: 0.375rem; color: var(--wrn-color-text); }
+    .wrn-clipboard__title { font-size: 0.8125rem; font-weight: 600; }
+    .wrn-clipboard__description { margin: 0; color: var(--wrn-color-text-muted, var(--wrn-color-muted)); font-size: 0.78rem; }
+
+    /* Plain values sit in a recessed field well; code values (the default)
+       sit on the code surface so they read as something to paste. */
+    .wrn-clipboard__control {
+      display: flex;
+      min-width: 0;
+      min-height: 2.75rem;
+      align-items: center;
+      gap: 0.5rem;
+      padding: 0.3125rem 0.3125rem 0.3125rem 0.875rem;
+      border: 1px solid var(--wrn-color-input-border, var(--wrn-color-border));
+      border-radius: var(--wrn-radius-sm);
+      background: var(--wrn-color-input-background, var(--wrn-color-surface));
+      box-shadow: inset 0 1px 2px rgb(0 0 0 / 0.04);
+    }
+    .wrn-clipboard:has(code.wrn-clipboard__value) .wrn-clipboard__control {
+      border-color: var(--wrn-color-code-border, #262a33);
+      background: var(--wrn-color-code-background, #14161b);
+      box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.04);
+    }
+    .wrn-clipboard__value {
+      min-width: 0;
+      flex: 1;
+      overflow-x: auto;
+      padding: 0.25rem 0;
+      color: var(--wrn-color-text);
+      background: transparent;
+      font: inherit;
+      font-size: 0.8125rem;
+      white-space: nowrap;
+      scrollbar-width: none;
+    }
+    code.wrn-clipboard__value {
+      color: var(--wrn-color-code-text, #e6e9f0);
+      font-family: var(--wrn-font-mono, ui-monospace, monospace);
+      font-size: 0.8rem;
+    }
+    .wrn-clipboard__value::-webkit-scrollbar { display: none; }
+
+    .wrn-clipboard__button {
+      display: inline-flex;
+      flex: none;
+      align-items: center;
+      gap: 0.375rem;
+      min-height: 2rem;
+      padding: 0 0.7rem;
+      border: 1px solid var(--wrn-color-border);
+      border-bottom-color: var(--wrn-color-border-strong, var(--wrn-color-border));
+      border-radius: calc(var(--wrn-radius-sm) - 2px);
+      color: var(--wrn-color-text);
+      background: linear-gradient(180deg, var(--wrn-color-surface), var(--wrn-color-surface-soft, var(--wrn-color-surface)));
+      box-shadow: var(--wrn-shadow-1);
+      font: inherit;
+      font-size: 0.78rem;
+      font-weight: 600;
+      cursor: pointer;
+      transition: color 120ms ease, background 120ms ease, border-color 120ms ease;
+    }
+    .wrn-clipboard:has(code.wrn-clipboard__value) .wrn-clipboard__button {
+      border-color: rgb(255 255 255 / 0.12);
+      color: var(--wrn-color-code-text, #e6e9f0);
+      background: rgb(255 255 255 / 0.06);
+      box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.06);
+    }
+    .wrn-clipboard__button:hover:not(:disabled) { background: var(--wrn-color-surface); }
+    .wrn-clipboard:has(code.wrn-clipboard__value) .wrn-clipboard__button:hover:not(:disabled) { background: rgb(255 255 255 / 0.12); }
+    .wrn-clipboard__button:active:not(:disabled) { transform: translateY(1px); }
+    .wrn-clipboard__button:focus-visible { outline: 2px solid var(--wrn-color-focus); outline-offset: 2px; }
+    .wrn-clipboard__button:disabled { cursor: not-allowed; opacity: 0.5; }
+    .wrn-clipboard[data-status="success"] .wrn-clipboard__button,
+    .wrn-clipboard[data-status="success"]:has(code.wrn-clipboard__value) .wrn-clipboard__button {
+      border-color: color-mix(in srgb, var(--wrn-color-success) 50%, transparent);
+      color: var(--wrn-color-success);
+      background: color-mix(in srgb, var(--wrn-color-success) 14%, transparent);
+    }
+    .wrn-clipboard[data-status="error"] .wrn-clipboard__button,
+    .wrn-clipboard[data-status="error"]:has(code.wrn-clipboard__value) .wrn-clipboard__button {
+      border-color: color-mix(in srgb, var(--wrn-color-danger) 50%, transparent);
+      color: var(--wrn-color-danger);
+      background: color-mix(in srgb, var(--wrn-color-danger) 12%, transparent);
+    }
+    .wrn-clipboard__icon { width: 0.875rem; height: 0.875rem; flex: none; }
+
   }
 }