refactor: チャットルームをComposition API化 (#8850)

* pick form

* pick message

* pick room

* fix lint

* fix scroll?

* fix scroll.ts

* fix directives/sticky-container

* update global/sticky-container.vue

* fix, 🎨

* test.1

packages/client/src/directives/sticky-container.ts

@@ -5,8 +5,10 @@ export default {
 		//const query = binding.value;
 
 		const header = src.children[0];
+		const body = src.children[1];
 		const currentStickyTop = getComputedStyle(src).getPropertyValue('--stickyTop') || '0px';
 		src.style.setProperty('--stickyTop', `calc(${currentStickyTop} + ${header.offsetHeight}px)`);
+		if (body) body.dataset.stickyContainerHeaderHeight = header.offsetHeight.toString();
 		header.style.setProperty('--stickyTop', currentStickyTop);
 		header.style.position = 'sticky';
 		header.style.top = 'var(--stickyTop)';