Fix: High CPU / memory leak when filtering model list window to empty results (#6435)

packages/opencode/src/cli/cmd/tui/ui/dialog-select.tsx

@@ -115,11 +115,12 @@ export function DialogSelect<T>(props: DialogSelectProps<T>) {
           setStore("selected", currentIndex)
         }
       }
-      scroll.scrollTo(0)
+      scroll?.scrollTo(0)
     }),
   )
 
   function move(direction: number) {
+    if (flat().length === 0) return
     let next = store.selected + direction
     if (next < 0) next = flat().length - 1
     if (next >= flat().length) next = 0
@@ -129,6 +130,7 @@ export function DialogSelect<T>(props: DialogSelectProps<T>) {
   function moveTo(next: number) {
     setStore("selected", next)
     props.onMove?.(selected()!)
+    if (!scroll) return
     const target = scroll.getChildren().find((child) => {
       return child.id === JSON.stringify(selected()?.value)
     })
@@ -172,7 +174,7 @@ export function DialogSelect<T>(props: DialogSelectProps<T>) {
     }
   })
 
-  let scroll: ScrollBoxRenderable
+  let scroll: ScrollBoxRenderable | undefined
   const ref: DialogSelectRef<T> = {
     get filter() {
       return store.filter
@@ -213,6 +215,14 @@ export function DialogSelect<T>(props: DialogSelectProps<T>) {
           />
         </box>
       </box>
+      <Show
+        when={grouped().length > 0}
+        fallback={
+          <box paddingLeft={4} paddingRight={4} paddingTop={1}>
+            <text fg={theme.textMuted}>No results found</text>
+          </box>
+        }
+      >
         <scrollbox
           paddingLeft={1}
           paddingRight={1}
@@ -268,6 +278,7 @@ export function DialogSelect<T>(props: DialogSelectProps<T>) {
             )}
           </For>
         </scrollbox>
+      </Show>
       <Show when={keybinds().length} fallback={<box flexShrink={0} />}>
         <box paddingRight={2} paddingLeft={4} flexDirection="row" gap={2} flexShrink={0} paddingTop={1}>
           <For each={keybinds()}>