webui: add "Send message on Enter" setting (#21577)

* webui: make Enter to send chat a setting

* Shorten description

* Use isMobile hook from $lib/hooks

* Rebuild static output

tools/server/webui/src/lib/services/parameter-sync.service.ts

@@ -239,6 +239,12 @@ export const SYNCABLE_PARAMETERS: SyncableParameter[] = [
 		serverKey: 'excludeReasoningFromContext',
 		type: SyncableParameterType.BOOLEAN,
 		canSync: true
+	},
+	{
+		key: 'sendOnEnter',
+		serverKey: 'sendOnEnter',
+		type: SyncableParameterType.BOOLEAN,
+		canSync: true
 	}
 ];