fix: remove unused isStreaming prop from quickActions

The isStreaming prop was passed through multiple chat components but wasn't being strict enough in the Markdown component where it was ultimately passed causing the quick actions to be disabled.

app/components/chat/Markdown.tsx

@@ -18,11 +18,10 @@ interface MarkdownProps {
   append?: (message: Message) => void;
   chatMode?: 'discuss' | 'build';
   setChatMode?: (mode: 'discuss' | 'build') => void;
-  isStreaming?: boolean;
 }
 
 export const Markdown = memo(
-  ({ children, html = false, limitedMarkdown = false, append, setChatMode, isStreaming }: MarkdownProps) => {
+  ({ children, html = false, limitedMarkdown = false, append, setChatMode }: MarkdownProps) => {
     logger.trace('Render');
 
     const components = useMemo(() => {
@@ -102,7 +101,6 @@ export const Markdown = memo(
                 data-message={message}
                 data-path={path}
                 data-href={href}
-                disabled={isStreaming}
                 onClick={() => {
                   if (type === 'file') {
                     openArtifactInWorkbench(path);