- Add textarea for input

- Remove channel switch button
- Integrate channel switch selection into channel name
- Fix state() warnings

ChatTwo/Http/Frontend/src/routes/+page.svelte

@@ -2,7 +2,7 @@
     import { page } from '$app/state'
     import { Alert } from '@sveltestrap/sveltestrap';
 
-    let data: App.Warning | null = null;
+    let data: App.Warning = $state({ hasWarning: false, content: '' });
     $effect.pre(() => {
         if (page.url.searchParams.has('message')) {
             data = {