Cancel composer focus frames from root cleanup (#3452)

src/renderer/src/components/NewWorkspaceComposerCard.tsx

@@ -41,6 +41,7 @@ type RepoOption = React.ComponentProps<typeof RepoCombobox>['repos'][number]
 type NewWorkspaceComposerCardProps = {
   containerClassName?: string
   composerRef?: React.RefObject<HTMLDivElement | null>
+  onComposerNodeChange?: (node: HTMLDivElement | null) => void
   nameInputRef?: React.RefObject<HTMLInputElement | null>
   quickAgent: TuiAgent | null
   onQuickAgentChange: (agent: TuiAgent | null) => void
@@ -205,6 +206,7 @@ function useComposerFileDragOver(): {
 export default function NewWorkspaceComposerCard({
   containerClassName,
   composerRef,
+  onComposerNodeChange,
   nameInputRef,
   quickAgent,
   onQuickAgentChange,
@@ -281,7 +283,19 @@ export default function NewWorkspaceComposerCard({
     nameInputFocusFrameRef.current = null
   }, [])
 
-  React.useEffect(() => cancelNameInputFocusFrame, [cancelNameInputFocusFrame])
+  const setComposerNode = React.useCallback(
+    (node: HTMLDivElement | null): void => {
+      // Why: the queued repo-picker focus is only valid while this composer exists.
+      if (!node) {
+        cancelNameInputFocusFrame()
+      }
+      if (composerRef) {
+        composerRef.current = node
+      }
+      onComposerNodeChange?.(node)
+    },
+    [cancelNameInputFocusFrame, composerRef, onComposerNodeChange]
+  )
 
   const focusNameInput = React.useCallback(() => {
     // Why: after the repo picker commits a choice, moving focus to the name
@@ -313,7 +327,7 @@ export default function NewWorkspaceComposerCard({
 
   return (
     <div
-      ref={composerRef}
+      ref={setComposerNode}
       // Why: preload classifies native OS file drops by the nearest
       // `data-native-file-drop-target` marker in the composedPath. Tagging
       // the composer root makes drops anywhere on the card route to the

src/renderer/src/components/NewWorkspaceComposerModal.tsx

@@ -100,7 +100,14 @@ function QuickTabBody({
   active: boolean
 }): React.JSX.Element {
   const settings = useAppStore((s) => s.settings)
-  const { cardProps, composerRef, nameInputRef, submitQuick, createDisabled } = useComposerState({
+  const {
+    cardProps,
+    composerRef,
+    onComposerNodeChange,
+    nameInputRef,
+    submitQuick,
+    createDisabled
+  } = useComposerState({
     initialName: modalData.prefilledName ?? '',
     // Why: the modal is quick-create only now, so prompt-prefill state is
     // intentionally ignored even if older callers still send it.
@@ -219,6 +226,7 @@ function QuickTabBody({
       </DialogHeader>
       <NewWorkspaceComposerCard
         composerRef={composerRef}
+        onComposerNodeChange={onComposerNodeChange}
         nameInputRef={nameInputRef}
         quickAgent={quickAgent}
         onQuickAgentChange={handleQuickAgentChange}

src/renderer/src/hooks/useComposerState.ts

@@ -212,6 +212,7 @@ export type UseComposerStateResult = {
   /** Ref the consumer should attach to the composer wrapper so the global
    *  Enter-to-submit handler can scope its behavior to the visible composer. */
   composerRef: React.RefObject<HTMLDivElement | null>
+  onComposerNodeChange: (node: HTMLDivElement | null) => void
   promptTextareaRef: React.RefObject<HTMLTextAreaElement | null>
   nameInputRef: React.RefObject<HTMLInputElement | null>
   submit: () => Promise<void>
@@ -514,7 +515,16 @@ export function useComposerState(options: UseComposerStateOptions): UseComposerS
     promptCaretFrameRef.current = null
   }, [])
 
-  useEffect(() => cancelPromptCaretFrame, [cancelPromptCaretFrame])
+  const handleComposerNodeChange = useCallback(
+    (node: HTMLDivElement | null): void => {
+      // Why: the queued caret restoration targets composer descendants and
+      // must be canceled as soon as the composer root leaves the DOM.
+      if (!node) {
+        cancelPromptCaretFrame()
+      }
+    },
+    [cancelPromptCaretFrame]
+  )
 
   const hookCheckRef = useRef<{
     key: string
@@ -2329,6 +2339,7 @@ export function useComposerState(options: UseComposerStateOptions): UseComposerS
   return {
     cardProps,
     composerRef,
+    onComposerNodeChange: handleComposerNodeChange,
     promptTextareaRef,
     nameInputRef,
     submit,