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/TreeView.wrn

@@ -87,17 +87,50 @@ component TreeView {
     .wrn-tree-view { display: grid; gap: 0.5rem; color: var(--wrn-color-text); }
     .wrn-tree-view__title { font-size: 0.95rem; }
     .wrn-tree-view__description, .wrn-tree-view__empty { margin: 0; color: var(--wrn-color-muted); font-size: 0.8rem; }
-    .wrn-tree-view__tree { display: grid; gap: 0.15rem; padding: 0.4rem; border: 1px solid var(--wrn-color-border); border-radius: var(--wrn-radius); background: var(--wrn-color-surface); }
+    .wrn-tree-view__tree {
+      display: grid;
+      gap: 0.0625rem;
+      padding: 0.3rem;
+      border: 1px solid var(--wrn-color-border);
+      border-radius: var(--wrn-radius);
+      background: var(--wrn-color-surface);
+      box-shadow: var(--wrn-shadow-1);
+    }
     .wrn-tree-view__row { display: flex; min-width: 0; align-items: center; gap: 0.2rem; border-radius: var(--wrn-radius-sm); }
-    .wrn-tree-view__row[aria-selected="true"] { background: var(--wrn-color-primary-soft); }
+    .wrn-tree-view__row[aria-selected="true"] {
+      background: color-mix(in srgb, var(--wrn-color-primary) 9%, var(--wrn-color-surface));
+      box-shadow: inset 2px 0 0 var(--wrn-color-primary);
+    }
     .wrn-tree-view__toggle { display: inline-grid; width: 1.8rem; height: 1.8rem; flex: none; padding: 0; place-items: center; border: 0; border-radius: 0.35rem; color: var(--wrn-color-muted); background: transparent; }
     button.wrn-tree-view__toggle { cursor: pointer; }
     .wrn-tree-view__toggle > span { width: 0.9rem; height: 0.9rem; transition: transform var(--wrn-motion-fast); }
     .wrn-tree-view__row[aria-expanded="true"] > .wrn-tree-view__toggle > span { transform: rotate(90deg); }
-    .wrn-tree-view__node { display: flex; min-width: 0; flex: 1; align-items: center; gap: 0.45rem; padding: 0.45rem 0.5rem; border: 0; border-radius: var(--wrn-radius-sm); color: inherit; background: transparent; font: inherit; text-align: left; cursor: pointer; }
-    .wrn-tree-view__node:hover, button.wrn-tree-view__toggle:hover { background: var(--wrn-color-surface-2); }
+    .wrn-tree-view__node {
+      display: flex;
+      min-width: 0;
+      flex: 1;
+      align-items: center;
+      gap: 0.45rem;
+      padding: 0.375rem 0.5rem;
+      border: 0;
+      border-radius: calc(var(--wrn-radius-sm) - 2px);
+      color: inherit;
+      background: transparent;
+      font: inherit;
+      font-size: 0.8125rem;
+      text-align: left;
+      cursor: pointer;
+    }
+    .wrn-tree-view__node:hover, button.wrn-tree-view__toggle:hover {
+      background: var(--wrn-color-surface-muted, var(--wrn-color-surface-2));
+    }
     .wrn-tree-view__node:focus-visible, button.wrn-tree-view__toggle:focus-visible { outline: 2px solid var(--wrn-color-focus); outline-offset: -2px; }
-    .wrn-tree-view__node > [class*="icon-"] { width: 1rem; height: 1rem; flex: none; color: var(--wrn-color-primary); }
+    .wrn-tree-view__node > [class*="icon-"] {
+      width: 1rem;
+      height: 1rem;
+      flex: none;
+      color: var(--wrn-color-text-subtle, var(--wrn-color-muted));
+    }
     .wrn-tree-view__group { display: grid; margin-left: 1.8rem; padding-left: 0.45rem; border-left: 1px solid var(--wrn-color-border); }
   }
 }