wip(desktop): layout improvements

packages/desktop/src/components/sticky-accordion-header.tsx

@@ -0,0 +1,17 @@
+import { Accordion } from "@opencode-ai/ui"
+import { ParentProps } from "solid-js"
+
+export function StickyAccordionHeader(props: ParentProps<{ class?: string }>) {
+  return (
+    <Accordion.Header
+      classList={{
+        "sticky top-0 data-expanded:z-10": true,
+        "data-expanded:before:content-[''] data-expanded:before:z-[-10]": true,
+        "data-expanded:before:absolute data-expanded:before:inset-0 data-expanded:before:bg-background-stronger": true,
+        [props.class ?? ""]: !!props.class,
+      }}
+    >
+      {props.children}
+    </Accordion.Header>
+  )
+}