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/InputNumber.wrn

@@ -232,26 +232,17 @@ component InputNumber {
             )
         }
 
+        // Outputs are resolved by name, so each one is written out. Raw
+        // CustomEvents dispatched on the root -- what this did before -- never
+        // reach a parent @binding.
         client function dispatchInputNumberEvent(
             sourceEvent,
             eventName,
             action,
             previousValue,
-            root,
-            customEvent
+            payload
         ) {
-            root = sourceEvent.currentTarget.closest("[data-wrn-input-number]")
-
-            if (!root && sourceEvent.target) {
-                root = sourceEvent.target.closest("[data-wrn-input-number]")
-            }
-
-            if (!root) {
-                return
-            }
-
-            customEvent = document.createEvent("CustomEvent")
-            customEvent.initCustomEvent(eventName, true, false, {
+            payload = {
                 component: "InputNumber",
                 name: name,
                 value: currentValue,
@@ -261,8 +252,17 @@ component InputNumber {
                 max: hasMax() ? Number(max) : null,
                 step: normalizedStep(),
                 valid: !isInvalid()
-            })
-            root.dispatchEvent(customEvent)
+            }
+
+            if (eventName === "input") {
+                output.input(payload)
+            } else if (eventName === "change") {
+                output.change(payload)
+            } else if (eventName === "increment") {
+                output.increment(payload)
+            } else if (eventName === "decrement") {
+                output.decrement(payload)
+            }
         }
 
         client function applyControlValue(nextValue, action, sourceEvent, previousValue) {