refactor(ui-workspace): extract shared drag-accept and status-dot renderers

The flat-list ordering change duplicated the document-level native-drag
acceptance effect and the status-dot block across the search and session
rows, tripping the duplication gate. Extract useNativeDragAcceptance and
SessionStatusDots so both call sites share one implementation.

packages/client/ui-workspace/src/client/WorkspaceBrowser.tsx

@@ -54,6 +54,28 @@ function toggled(list: readonly string[], key: string): string[] {
   return list.includes(key) ? list.filter(k => k !== key) : [...list, key]
 }
 
+/**
+ * Accept the native drag at document level while a row drag is active: row
+ * hover still owns the insertion marker, and releasing outside the list must
+ * not be rendered as a rejected drop before dragend commits that last marker.
+ */
+function useNativeDragAcceptance(active: boolean): void {
+  useEffect(() => {
+    if (!active) return
+    const acceptDrag = (event: DragEvent): void => {
+      event.preventDefault()
+      if (event.dataTransfer !== null) event.dataTransfer.dropEffect = 'move'
+    }
+    const acceptDrop = (event: DragEvent): void => { event.preventDefault() }
+    document.addEventListener('dragover', acceptDrag)
+    document.addEventListener('drop', acceptDrop)
+    return () => {
+      document.removeEventListener('dragover', acceptDrag)
+      document.removeEventListener('drop', acceptDrop)
+    }
+  }, [active])
+}
+
 /** Reconcile a stored view order with the Workspace's current session account. */
 function reconciledSessionOrder(sessionIds: readonly SessionId[], stored: readonly string[] | undefined): SessionId[] {
   if (stored === undefined) return [...sessionIds]
@@ -241,23 +263,7 @@ function SessionTree({
   const workspaceDropCommitted = useRef(false)
   const previousOrderBy = useRef(orderBy)
   const nativeDragActive = drag !== null || workspaceDrag !== null
-  useEffect(() => {
-    if (!nativeDragActive) return
-    // Row hover still owns the insertion marker. Accept the native drag at
-    // document level so releasing outside the list is not rendered as a
-    // rejected drop before dragend commits that last marker.
-    const acceptDrag = (event: DragEvent): void => {
-      event.preventDefault()
-      if (event.dataTransfer !== null) event.dataTransfer.dropEffect = 'move'
-    }
-    const acceptDrop = (event: DragEvent): void => { event.preventDefault() }
-    document.addEventListener('dragover', acceptDrag)
-    document.addEventListener('drop', acceptDrop)
-    return () => {
-      document.removeEventListener('dragover', acceptDrag)
-      document.removeEventListener('drop', acceptDrop)
-    }
-  }, [nativeDragActive])
+  useNativeDragAcceptance(nativeDragActive)
   const currentGroup = current === undefined
     ? undefined
     : (workspaces.find(w => w.sessionIds.includes(current))?.workspaceId as string | undefined)
@@ -590,20 +596,7 @@ function FlatList({
   }, [baseRows, recentSessionOrder, sessionIds])
   const [drag, setDrag] = useState<DragState | null>(null)
   const dropCommitted = useRef(false)
-  useEffect(() => {
-    if (drag === null) return
-    const acceptDrag = (event: DragEvent): void => {
-      event.preventDefault()
-      if (event.dataTransfer !== null) event.dataTransfer.dropEffect = 'move'
-    }
-    const acceptDrop = (event: DragEvent): void => { event.preventDefault() }
-    document.addEventListener('dragover', acceptDrag)
-    document.addEventListener('drop', acceptDrop)
-    return () => {
-      document.removeEventListener('dragover', acceptDrag)
-      document.removeEventListener('drop', acceptDrop)
-    }
-  }, [drag])
+  useNativeDragAcceptance(drag !== null)
   const commitDrag = (activeDrag: DragState, over: NonNullable<DragState['over']>): void => {
     if (dropCommitted.current) return
     dropCommitted.current = true

packages/client/ui-workspace/src/client/rows/Rows.tsx

@@ -259,6 +259,18 @@ function sessionStatuses(
   return [{ state: 'done', label: t('status.idle') }]
 }
 
+/** Primary status dot plus every status's screen-reader label, shared by the search and session rows. */
+function SessionStatusDots({ statuses }: { statuses: readonly [SessionStatus, ...SessionStatus[]] }) {
+  return (
+    <>
+      <StateDot state={statuses[0].state} />
+      {statuses.map(status => (
+        <span className={css.visuallyHidden} key={status.label}>{status.label}</span>
+      ))}
+    </>
+  )
+}
+
 /** Hover-card body: full title, relative time, and every relevant live status. */
 function SessionHoverContent({ node, now, t }: { node: SessionNode; now: number; t: RowTranslate }) {
   const statuses = sessionStatuses(node, t)
@@ -308,12 +320,7 @@ export function SearchResultItem({ result, currentId, onOpen, t }: {
       <span className={css.searchResultHeading}>
         <span className={css.slot}>
           {(primaryStatus.state !== 'done' || result.completed) && (
-            <>
-              <StateDot state={primaryStatus.state} />
-              {statuses.map(status => (
-                <span className={css.visuallyHidden} key={status.label}>{status.label}</span>
-              ))}
-            </>
+            <SessionStatusDots statuses={statuses} />
           )}
         </span>
         <span className={css.searchResultTitle}>{result.title}</span>
@@ -417,14 +424,7 @@ export function SessionNodeItem({ node, currentId, now, onOpen, onRename, onFork
           and is cleared by opening the session. */}
       {(!flat || showStatus) && (
         <span className={css.slot}>
-          {showStatus && (
-            <>
-              <StateDot state={primaryStatus.state} />
-              {statuses.map(status => (
-                <span className={css.visuallyHidden} key={status.label}>{status.label}</span>
-              ))}
-            </>
-          )}
+          {showStatus && <SessionStatusDots statuses={statuses} />}
         </span>
       )}
       <span className={css.title}>{title}</span>