fix(csr,ui): deliver component outputs to parent bindings

An output only reaches a parent @binding when the component calls
output.<name>(). Two separate faults meant most of the library never got
there, and both failed silently at each end.

HTML lowercases attribute names, so a parent's @sizeChange registered under
"sizechange" while the component emitted "sizeChange". The lookup missed, fell
through to a DOM dispatch, and the binding was never invoked. That made all 17
camelCase outputs undeliverable -- DataTable.pageChange and .rowClick,
Map.markerClick, ChatBubble.messageClick, LayoutSplitter.sizeChange and the
rest. invokeComponentOutput now falls back to a case-insensitive lookup, and a
csr test fails without it.

Separately, 18 components dispatched hand-built CustomEvents rather than
calling output.*. A bubbling event on the component's own root never reaches a
binding, because parent handlers live in a registry only the output proxy
reads. Card, Footer, Breadcrumb, Accordion, alert, Badge, AnnouncementBar,
AvatarGroup, ToggleCount and InputNumber now emit properly; Marquee, Map,
Timeline, List and SearchBox additionally declare the outputs they were
already firing. Dispatches on window are left alone -- that is how Toaster,
Modal and DataTable signal across component boundaries.

Verified in a browser both ways before and after: an AnnouncementBar
dispatching its own bubbling "dismiss" never reached a page-level @dismiss,
and reached it immediately once it called output.dismiss().

This corrects the audit, which called the LayoutSplitter failure "narrow and
unexplained" and read 32 dead outputs as 16 components needing a rebuild.
"Outputs work elsewhere" was an assumption; the components that worked
happened to use lowercase names and output.*. The dead-output ratchet drops
from 32 to 22, and a new test forbids the raw-CustomEvent pattern outright.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

packages/ui/components/SearchBox.wrn

@@ -1,4 +1,9 @@
 component SearchBox {
+  outputs {
+    search(payload: { sourceEvent?: Event; [key: string]: string | number | boolean | null | object })
+    clear(payload: { sourceEvent?: Event; [key: string]: string | number | boolean | null | object })
+  }
+
   props {
     size: string = "default"
     color: string = "primary"
@@ -22,7 +27,7 @@ component SearchBox {
       data-ui-component="SearchBox"
       role="search"
       class='w-full {class}'
-      @submit='event.preventDefault(); event.currentTarget.dispatchEvent(new CustomEvent("search", { bubbles: true, detail: { value: query, name: name } }))'
+      @submit='event.preventDefault(); output.search({ value: query, name: name })'
     >
       <label
         class="mb-2 block text-sm font-semibold text-[var(--wire-color-text)]"
@@ -61,7 +66,7 @@ component SearchBox {
           aria-label="Clear search"
           data-show='query.length > 0 && !disabled'
           class="absolute right-12 inline-flex size-8 items-center justify-center rounded-lg text-[var(--wire-color-text-muted)] transition hover:bg-[var(--wire-color-surface-soft)] hover:text-[var(--wire-color-text)] focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[var(--wire-color-focus)]"
-          @click='query = ""; event.currentTarget.parentElement.querySelector("input")?.focus(); event.currentTarget.dispatchEvent(new CustomEvent("clear", { bubbles: true, detail: { value: "", name: name } }))'
+          @click='query = ""; event.currentTarget.parentElement.querySelector("input")?.focus(); output.clear({ value: "", name: name })'
         >
           <span class="icon-[lucide--x] size-4" aria-hidden="true"></span>
         </button>