feat: rich text input for chat

src/routes/(app)/+layout.svelte

@@ -137,7 +137,7 @@
 				if (isShiftPressed && event.key === 'Escape') {
 					event.preventDefault();
 					console.log('focusInput');
-					document.getElementById('chat-textarea')?.focus();
+					document.getElementById('chat-input')?.focus();
 				}
 
 				// Check if Ctrl + Shift + ; is pressed