Stabilize file viewer browser pane

Co-Authored-By: Paperclip <noreply@paperclip.ing>

ui/src/components/FileViewerSheet.copy.test.tsx

@@ -143,4 +143,11 @@ describe("FileViewerSheet copy actions", () => {
     expect(writeText).toHaveBeenCalledWith(window.location.href);
     expect(document.body.textContent).toContain("Copied link");
   });
+
+  it("renders a keyboard-addressable file tree resize separator", () => {
+    renderSheet();
+    const separator = document.body.querySelector('[role="separator"][aria-label="Resize file tree"]');
+    expect(separator).not.toBeNull();
+    expect(separator?.getAttribute("aria-valuenow")).toBe("288");
+  });
 });

ui/src/components/FileViewerSheet.tsx

@@ -4,6 +4,8 @@ import {
   useMemo,
   useRef,
   useState,
+  type KeyboardEvent as ReactKeyboardEvent,
+  type PointerEvent as ReactPointerEvent,
   type ReactNode,
 } from "react";
 import { useQuery, type UseQueryResult } from "@tanstack/react-query";
@@ -49,6 +51,8 @@ import type {
 
 const FILE_VIEWER_LABELLED_BY_ID = "paperclip-file-viewer-title";
 const FILE_VIEWER_DESCRIBED_BY_ID = "paperclip-file-viewer-description";
+const MIN_FILE_TREE_WIDTH = 220;
+const MAX_FILE_TREE_WIDTH = 520;
 
 interface FileViewerErrorShape {
   status: number;
@@ -430,7 +434,9 @@ export function FileViewerSheet({
   const [copyingField, setCopyingField] = useState<"content" | "link" | null>(null);
   const [copyFeedback, setCopyFeedback] = useState("");
   const [announcement, setAnnouncement] = useState<string>("");
+  const [fileTreeWidth, setFileTreeWidth] = useState(288);
   const copyFeedbackTimerRef = useRef<number | null>(null);
+  const resizeCleanupRef = useRef<(() => void) | null>(null);
 
   useEffect(() => {
     if (!state) {
@@ -485,6 +491,7 @@ export function FileViewerSheet({
 
   useEffect(() => () => {
     if (copyFeedbackTimerRef.current) window.clearTimeout(copyFeedbackTimerRef.current);
+    resizeCleanupRef.current?.();
   }, []);
 
   const handleOpenChange = useCallback(
@@ -573,6 +580,37 @@ export function FileViewerSheet({
     if (canPreview) void contentQuery.refetch();
   }, [canPreview, contentQuery, resolveQuery]);
 
+  const handleResizeStart = useCallback((event: ReactPointerEvent<HTMLDivElement>) => {
+    event.preventDefault();
+    resizeCleanupRef.current?.();
+    const startX = event.clientX;
+    const startWidth = fileTreeWidth;
+    const handlePointerMove = (moveEvent: PointerEvent) => {
+      const nextWidth = Math.min(
+        MAX_FILE_TREE_WIDTH,
+        Math.max(MIN_FILE_TREE_WIDTH, startWidth + moveEvent.clientX - startX),
+      );
+      setFileTreeWidth(nextWidth);
+    };
+    const cleanup = () => {
+      document.removeEventListener("pointermove", handlePointerMove);
+      document.removeEventListener("pointerup", cleanup);
+      resizeCleanupRef.current = null;
+    };
+    resizeCleanupRef.current = cleanup;
+    document.addEventListener("pointermove", handlePointerMove);
+    document.addEventListener("pointerup", cleanup, { once: true });
+  }, [fileTreeWidth]);
+
+  const handleResizeKeyDown = useCallback((event: ReactKeyboardEvent<HTMLDivElement>) => {
+    if (event.key !== "ArrowLeft" && event.key !== "ArrowRight") return;
+    event.preventDefault();
+    setFileTreeWidth((current) => {
+      const delta = event.key === "ArrowLeft" ? -24 : 24;
+      return Math.min(MAX_FILE_TREE_WIDTH, Math.max(MIN_FILE_TREE_WIDTH, current + delta));
+    });
+  }, []);
+
   const title = state ? basename(state.path) : "Browse workspace";
   const description = state
     ? middleTruncatePath(state.path)
@@ -692,19 +730,39 @@ export function FileViewerSheet({
           </div>
           {state ? (
             <div className="flex min-h-0 flex-1 gap-3 bg-muted/30 p-3">
-              <aside className="hidden min-h-0 w-72 shrink-0 overflow-hidden rounded-md border border-border bg-background sm:flex">
+              <aside
+                className="hidden min-h-0 shrink-0 overflow-hidden rounded-md border border-border bg-background sm:flex"
+                style={{ width: fileTreeWidth }}
+              >
                 <WorkspaceFileBrowser
                   key={`${state.projectId ?? ""}:${state.workspaceId ?? ""}`}
                   issueId={issueId}
                   companyId={companyId}
                   onOpen={handleBrowseOpen}
-                  initialProjectId={state.projectId}
-                  initialWorkspaceId={state.workspaceId}
+                  initialQuery={cameFromBrowse ? viewer.query : null}
+                  initialFolderPath={cameFromBrowse ? viewer.folderPath : null}
+                  initialProjectId={state.projectId ?? (cameFromBrowse ? viewer.browseProjectId : null)}
+                  initialWorkspaceId={state.workspaceId ?? (cameFromBrowse ? viewer.browseWorkspaceId : null)}
                   autoFocusSearch={false}
                   compact
+                  selectedPath={state.path}
+                  selectedProjectId={state.projectId}
+                  selectedWorkspaceId={state.workspaceId}
                   className="min-h-0 flex-1 p-2"
                 />
               </aside>
+              <div
+                role="separator"
+                aria-orientation="vertical"
+                aria-label="Resize file tree"
+                aria-valuemin={MIN_FILE_TREE_WIDTH}
+                aria-valuemax={MAX_FILE_TREE_WIDTH}
+                aria-valuenow={fileTreeWidth}
+                tabIndex={0}
+                onPointerDown={handleResizeStart}
+                onKeyDown={handleResizeKeyDown}
+                className="hidden w-1 shrink-0 cursor-col-resize rounded-full bg-border transition-colors hover:bg-muted-foreground/60 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring sm:block"
+              />
               <div className="flex min-w-0 flex-1 flex-col overflow-hidden rounded-md border border-border bg-background">
                 <FileViewerBody
                   resolveQuery={resolveQuery}

ui/src/components/WorkspaceFileBrowser.test.tsx

@@ -184,8 +184,9 @@ describe("WorkspaceFileBrowser", () => {
     const { onOpen } = renderBrowser();
 
     expect(container.querySelector('[role="tree"]')).not.toBeNull();
-    expect(container.textContent).toContain("Recently changed");
-    expect(container.textContent).toContain("From Isolated workspace");
+    expect(container.textContent).toContain("Isolated workspace");
+    expect(container.textContent).not.toContain("Recently changed");
+    expect(container.textContent).not.toContain("From Isolated workspace");
 
     const option = Array.from(container.querySelectorAll('[role="treeitem"]')).find(
       (el) => el.getAttribute("title") === "ui/src/pages/IssueDetail.tsx",
@@ -238,9 +239,10 @@ describe("WorkspaceFileBrowser", () => {
     useQueryMock.mockReturnValue(ok(availableResponse([createItem()])));
     renderBrowser(vi.fn(), { autoFocusSearch: false });
     expect(container.querySelector("input")?.hasAttribute("autofocus")).toBe(false);
+    expect(container.querySelector("input")?.className).toContain("max-w-full");
   });
 
-  it("hides source controls, folder headings, workspace labels, and timestamps in compact preview mode", () => {
+  it("hides source controls, folder headings, workspace labels, and timestamps", () => {
     useQueryMock.mockReturnValue(ok(availableResponse([
       createItem({
         relativePath: "videos/90-days-paperclip/tweet.md",
@@ -260,6 +262,15 @@ describe("WorkspaceFileBrowser", () => {
     expect(container.textContent).toContain("tweet.md");
   });
 
+  it("marks the selected file in the tree", () => {
+    useQueryMock.mockReturnValue(ok(availableResponse([createItem()])));
+    renderBrowser(vi.fn(), { selectedPath: "ui/src/pages/IssueDetail.tsx" });
+    const selected = Array.from(container.querySelectorAll('[role="treeitem"]')).find(
+      (el) => el.getAttribute("title") === "ui/src/pages/IssueDetail.tsx",
+    );
+    expect(selected?.getAttribute("aria-selected")).toBe("true");
+  });
+
   it("does not render a Recent/All toggle", () => {
     useQueryMock.mockReturnValue(ok(availableResponse([createItem()])));
     renderBrowser();
@@ -320,8 +331,8 @@ describe("WorkspaceFileBrowser", () => {
       initialWorkspaceId: "workspace-content",
     });
 
-    expect(container.textContent).toContain("Other project");
-    expect(container.textContent).toContain("Browsing Paperclip Content / Paperclip Content");
+    expect(container.textContent).not.toContain("Other project");
+    expect(container.textContent).toContain("Paperclip Content / Paperclip Content");
     const listCall = useQueryMock.mock.calls.find(([options]) => options.queryKey?.[3] === "list");
     expect(listCall?.[0].queryKey[4]).toMatchObject({
       workspace: "project",
@@ -368,7 +379,7 @@ describe("WorkspaceFileBrowser", () => {
 
     expect(container.textContent).toContain("bundled-skills");
     expect(container.textContent).not.toContain(folderPath);
-    expect(container.textContent).toContain("Files in folder");
+    expect(container.textContent).not.toContain("Files in folder");
     const listCall = useQueryMock.mock.calls.find(([options]) => options.queryKey?.[3] === "list");
     expect(listCall?.[0].queryKey[4]).toMatchObject({
       workspace: "project",
@@ -390,6 +401,25 @@ describe("WorkspaceFileBrowser", () => {
       workspaceId: "workspace-content",
     });
   });
+
+  it("lets breadcrumb folders navigate to parent directories", () => {
+    const folderPath = "content-os/cases/active/";
+    useQueryMock.mockReturnValue(ok(availableResponse([createItem({
+      relativePath: `${folderPath}README.md`,
+      displayPath: `${folderPath}README.md`,
+    })])));
+
+    renderBrowser(vi.fn(), { initialFolderPath: folderPath });
+    const contentOsCrumb = Array.from(container.querySelectorAll("button")).find(
+      (el) => el.getAttribute("title") === "content-os",
+    );
+    expect(contentOsCrumb).not.toBeUndefined();
+    act(() => {
+      contentOsCrumb!.dispatchEvent(new MouseEvent("click", { bubbles: true, cancelable: true }));
+    });
+    const latestListCall = useQueryMock.mock.calls.filter(([options]) => options.queryKey?.[3] === "list").at(-1);
+    expect(latestListCall?.[0].queryKey[4]).toMatchObject({ path: "content-os" });
+  });
 });
 
 describe("describeUnavailable", () => {

ui/src/components/WorkspaceFileBrowser.tsx

@@ -10,9 +10,7 @@ import {
 import { useQuery } from "@tanstack/react-query";
 import { AlertTriangle, ChevronDown, ChevronRight, Cloud, FileCode2, FolderOpen, Loader2, Search } from "lucide-react";
 import { Input } from "@/components/ui/input";
-import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { cn } from "@/lib/utils";
-import { timeAgo } from "@/lib/timeAgo";
 import { fileResourcesApi } from "@/api/file-resources";
 import { projectsApi } from "@/api/projects";
 import { ApiError } from "@/api/client";
@@ -25,12 +23,6 @@ import type {
   WorkspaceFileSelector,
 } from "@paperclipai/shared";
 
-const WORKSPACE_OPTIONS: ReadonlyArray<{ value: WorkspaceFileSelector; label: string }> = [
-  { value: "auto", label: "Auto" },
-  { value: "execution", label: "Execution" },
-  { value: "project", label: "Project" },
-];
-
 type BrowserSource = "current" | "other";
 
 // Hard list cap. The spec called out ~50 to keep reads cheap; 100 trades a bit
@@ -43,16 +35,6 @@ function basename(path: string): string {
   return idx < 0 ? path : path.slice(idx + 1);
 }
 
-function trimTrailingSlash(path: string): string {
-  return path.replace(/\/+$/, "");
-}
-
-function folderName(path: string): string {
-  const trimmed = trimTrailingSlash(path);
-  if (!trimmed) return "";
-  return basename(trimmed);
-}
-
 function normalizeFolderPrefix(path: string | null | undefined): string {
   if (!path) return "";
   const trimmed = path.replace(/^\/+/, "").replace(/\/+$/, "");
@@ -107,60 +89,51 @@ function StateMessage({ icon, title, body }: { icon: ReactNode; title: string; b
   );
 }
 
-function WorkspaceSelector({
-  value,
-  onChange,
+function WorkspaceFileBreadcrumbs({
+  rootLabel,
+  folderPath,
+  onOpenFolder,
 }: {
-  value: WorkspaceFileSelector;
-  onChange: (next: WorkspaceFileSelector) => void;
+  rootLabel: string | null;
+  folderPath: string | null;
+  onOpenFolder: (path: string | null) => void;
 }) {
-  return (
-    <div role="group" aria-label="Workspace" className="inline-flex shrink-0 rounded-md border border-border p-0.5">
-      {WORKSPACE_OPTIONS.map((option) => (
-        <button
-          key={option.value}
-          type="button"
-          aria-pressed={value === option.value}
-          onClick={() => onChange(option.value)}
-          className={cn(
-            "rounded px-2 py-1 text-xs transition-colors",
-            value === option.value ? "bg-accent text-foreground" : "text-muted-foreground hover:text-foreground",
-          )}
-        >
-          {option.label}
-        </button>
-      ))}
-    </div>
-  );
-}
+  const segments = folderPath?.split("/").filter(Boolean) ?? [];
+  if (!rootLabel && segments.length === 0) return null;
 
-function SourceSelector({
-  value,
-  onChange,
-}: {
-  value: BrowserSource;
-  onChange: (next: BrowserSource) => void;
-}) {
   return (
-    <div role="group" aria-label="File source" className="inline-flex shrink-0 rounded-md border border-border p-0.5">
-      {[
-        { value: "current" as const, label: "Current workspace" },
-        { value: "other" as const, label: "Other project" },
-      ].map((option) => (
-        <button
-          key={option.value}
-          type="button"
-          aria-pressed={value === option.value}
-          onClick={() => onChange(option.value)}
-          className={cn(
-            "rounded px-2 py-1 text-xs transition-colors",
-            value === option.value ? "bg-accent text-foreground" : "text-muted-foreground hover:text-foreground",
-          )}
-        >
-          {option.label}
-        </button>
-      ))}
-    </div>
+    <nav aria-label="Current folder" className="min-w-0 overflow-hidden text-[11px] text-muted-foreground">
+      <ol className="flex min-w-0 items-center gap-1 overflow-hidden">
+        {rootLabel ? (
+          <li className="min-w-0 shrink">
+            <button
+              type="button"
+              onClick={() => onOpenFolder(null)}
+              className="max-w-full truncate rounded px-1 py-0.5 text-left hover:bg-accent hover:text-foreground"
+              title={rootLabel}
+            >
+              {rootLabel}
+            </button>
+          </li>
+        ) : null}
+        {segments.map((segment, index) => {
+          const path = segments.slice(0, index + 1).join("/");
+          return (
+            <li key={path} className="flex min-w-0 shrink items-center gap-1">
+              <span aria-hidden="true" className="shrink-0 opacity-50">/</span>
+              <button
+                type="button"
+                onClick={() => onOpenFolder(path)}
+                className="max-w-full truncate rounded px-1 py-0.5 text-left font-mono hover:bg-accent hover:text-foreground"
+                title={path}
+              >
+                {segment}
+              </button>
+            </li>
+          );
+        })}
+      </ol>
+    </nav>
   );
 }
 
@@ -168,15 +141,13 @@ interface WorkspaceFileRowProps {
   item: WorkspaceFileListItem;
   treeItemId: string;
   selected: boolean;
-  showTimestamp: boolean;
   depth: number;
   onOpen: () => void;
   onHover: () => void;
 }
 
-function WorkspaceFileRow({ item, treeItemId, selected, showTimestamp, depth, onOpen, onHover }: WorkspaceFileRowProps) {
+function WorkspaceFileRow({ item, treeItemId, selected, depth, onOpen, onHover }: WorkspaceFileRowProps) {
   const name = basename(item.relativePath);
-  const stamp = showTimestamp && item.modifiedAt ? timeAgo(item.modifiedAt) : null;
   return (
     <div
       id={treeItemId}
@@ -193,9 +164,6 @@ function WorkspaceFileRow({ item, treeItemId, selected, showTimestamp, depth, on
     >
       <FileCode2 aria-hidden="true" className="h-3.5 w-3.5 shrink-0 text-muted-foreground" />
       <span className="min-w-0 flex-1 truncate font-mono text-xs text-foreground">{name}</span>
-      {stamp ? (
-        <span className="hidden shrink-0 text-[11px] tabular-nums text-muted-foreground sm:inline">{stamp}</span>
-      ) : null}
     </div>
   );
 }
@@ -303,8 +271,8 @@ interface WorkspaceFileTreeProps {
   nodes: WorkspaceFileTreeNode[];
   listboxId: string;
   highlightedItemKey: string | null;
+  selectedItemKey: string | null;
   collapsedFolders: Set<string>;
-  showTimestamp: boolean;
   onToggleFolder: (key: string) => void;
   onOpen: (item: WorkspaceFileListItem) => void;
   onHoverFile: (item: WorkspaceFileListItem) => void;
@@ -314,8 +282,8 @@ function WorkspaceFileTree({
   nodes,
   listboxId,
   highlightedItemKey,
+  selectedItemKey,
   collapsedFolders,
-  showTimestamp,
   onToggleFolder,
   onOpen,
   onHoverFile,
@@ -352,8 +320,7 @@ function WorkspaceFileTree({
         key={node.key}
         item={node.item}
         treeItemId={`${listboxId}-file-${node.key}`}
-        selected={node.key === highlightedItemKey}
-        showTimestamp={showTimestamp}
+        selected={node.key === selectedItemKey || node.key === highlightedItemKey}
         depth={node.depth}
         onOpen={() => onOpen(node.item)}
         onHover={() => onHoverFile(node.item)}
@@ -386,6 +353,9 @@ export interface WorkspaceFileBrowserProps {
   initialWorkspaceId?: string | null;
   autoFocusSearch?: boolean;
   compact?: boolean;
+  selectedPath?: string | null;
+  selectedProjectId?: string | null;
+  selectedWorkspaceId?: string | null;
   className?: string;
 }
 
@@ -398,13 +368,14 @@ export function WorkspaceFileBrowser({
   initialProjectId,
   initialWorkspaceId,
   autoFocusSearch = true,
-  compact = false,
+  selectedPath,
+  selectedProjectId: activeProjectId,
+  selectedWorkspaceId: activeWorkspaceId,
   className,
 }: WorkspaceFileBrowserProps) {
-  const [source, setSource] = useState<BrowserSource>(
-    initialProjectId && initialWorkspaceId ? "other" : "current",
-  );
-  const [workspace, setWorkspace] = useState<WorkspaceFileSelector>("auto");
+  const source: BrowserSource =
+    initialProjectId && initialWorkspaceId ? "other" : "current";
+  const workspace: WorkspaceFileSelector = "auto";
   const [selectedProjectId, setSelectedProjectId] = useState<string | null>(initialProjectId ?? null);
   const [selectedWorkspaceId, setSelectedWorkspaceId] = useState<string | null>(initialWorkspaceId ?? null);
   const [folderPath, setFolderPath] = useState<string | null>(initialFolderPath ?? null);
@@ -462,6 +433,11 @@ export function WorkspaceFileBrowser({
     setSelectedWorkspaceId(nextWorkspace?.id ?? null);
   }, [projectsQuery.data, projectsWithWorkspaces, selectedProject, selectedProjectId, selectedWorkspaceId, source]);
 
+  useEffect(() => {
+    setSelectedProjectId(initialProjectId ?? null);
+    setSelectedWorkspaceId(initialWorkspaceId ?? null);
+  }, [initialProjectId, initialWorkspaceId]);
+
   useEffect(() => {
     const handle = window.setTimeout(() => setDebouncedQuery(searchInput.trim()), 150);
     return () => window.clearTimeout(handle);
@@ -569,16 +545,24 @@ export function WorkspaceFileBrowser({
     }
   }
 
-  function handleProjectChange(projectId: string) {
-    const project = projectsWithWorkspaces.find((item) => item.id === projectId) ?? null;
-    setSelectedProjectId(project?.id ?? null);
-    setSelectedWorkspaceId(project?.primaryWorkspace?.id ?? project?.workspaces[0]?.id ?? null);
-  }
-
   const highlightedItem = highlightedIndex >= 0 ? items[highlightedIndex] : undefined;
   const highlightedItemKey = highlightedItem ? itemKey(highlightedItem) : null;
+  const selectedItem = selectedPath
+    ? items.find((item) =>
+      item.relativePath === selectedPath &&
+      (activeProjectId ? item.projectId === activeProjectId : true) &&
+      (activeWorkspaceId ? item.workspaceId === activeWorkspaceId : true)
+    )
+    : null;
+  const selectedItemKey = selectedItem ? itemKey(selectedItem) : null;
   const activeOptionId = highlightedItemKey ? `${listboxId}-file-${highlightedItemKey}` : undefined;
 
+  function openFolder(path: string | null) {
+    setFolderPath(path);
+    setSearchInput("");
+    setDebouncedQuery("");
+  }
+
   function openItem(item: WorkspaceFileListItem) {
     const itemTarget = item.projectId
       ? { projectId: item.projectId, workspaceId: item.workspaceId }
@@ -671,8 +655,8 @@ export function WorkspaceFileBrowser({
         nodes={treeNodes}
         listboxId={listboxId}
         highlightedItemKey={highlightedItemKey}
+        selectedItemKey={selectedItemKey}
         collapsedFolders={collapsedFolders}
-        showTimestamp={false}
         onToggleFolder={toggleFolder}
         onOpen={openItem}
         onHoverFile={handleHoverFile}
@@ -681,8 +665,8 @@ export function WorkspaceFileBrowser({
   }
 
   return (
-    <div className={cn("flex min-h-0 flex-col gap-2", className)}>
-      <div className="relative">
+    <div className={cn("flex min-h-0 min-w-0 flex-col gap-2", className)}>
+      <div className="relative min-w-0 max-w-full overflow-hidden">
         <Search
           aria-hidden="true"
           className="pointer-events-none absolute left-2.5 top-1/2 h-3.5 w-3.5 -translate-y-1/2 text-muted-foreground"
@@ -702,99 +686,15 @@ export function WorkspaceFileBrowser({
           autoFocus={autoFocusSearch}
           autoComplete="off"
           spellCheck={false}
-          className="h-8 pl-8 font-mono text-xs"
+          className="h-8 w-full max-w-full min-w-0 pl-8 font-mono text-xs"
         />
       </div>
 
-      {!compact ? (
-        <>
-          <div className="flex flex-wrap items-center gap-2">
-            <span className="text-xs text-muted-foreground">Source</span>
-            <SourceSelector value={source} onChange={setSource} />
-            {source === "current" ? (
-              <>
-                <span className="text-xs text-muted-foreground">Workspace</span>
-                <WorkspaceSelector value={workspace} onChange={setWorkspace} />
-              </>
-            ) : null}
-          </div>
-
-          {source === "other" ? (
-            <div className="flex flex-wrap items-center gap-2">
-              <span className="text-xs text-muted-foreground">Project</span>
-              <Select
-                value={selectedProjectId ?? undefined}
-                onValueChange={handleProjectChange}
-                disabled={!companyId || projectsQuery.isFetching || projectsWithWorkspaces.length === 0}
-              >
-                <SelectTrigger size="sm" className="h-8 max-w-[260px] text-xs">
-                  <SelectValue placeholder={projectsQuery.isFetching ? "Loading projects" : "Choose project"} />
-                </SelectTrigger>
-                <SelectContent>
-                  {projectsWithWorkspaces.map((project) => (
-                    <SelectItem key={project.id} value={project.id}>
-                      {project.name}
-                    </SelectItem>
-                  ))}
-                </SelectContent>
-              </Select>
-
-              <span className="text-xs text-muted-foreground">Workspace</span>
-              <Select
-                value={selectedWorkspaceId ?? undefined}
-                onValueChange={setSelectedWorkspaceId}
-                disabled={!selectedProject || selectedProject.workspaces.length === 0}
-              >
-                <SelectTrigger size="sm" className="h-8 max-w-[260px] text-xs">
-                  <SelectValue placeholder="Choose workspace" />
-                </SelectTrigger>
-                <SelectContent>
-                  {(selectedProject?.workspaces ?? []).map((item) => (
-                    <SelectItem key={item.id} value={item.id}>
-                      {item.name}
-                    </SelectItem>
-                  ))}
-                </SelectContent>
-              </Select>
-            </div>
-          ) : null}
-
-          {source === "other" && selectedProject && selectedWorkspace ? (
-            <div
-              className="truncate text-[11px] text-muted-foreground"
-              title={`${selectedProject.name} / ${selectedWorkspace.name}`}
-            >
-              Browsing {selectedProject.name} / {selectedWorkspace.name}
-            </div>
-          ) : null}
-
-          {folderPath ? (
-            <div className="flex min-w-0 items-center gap-1.5 text-[11px] text-muted-foreground" title={folderPath}>
-              <FolderOpen aria-hidden="true" className="h-3 w-3 shrink-0" />
-              <span className="shrink-0">Folder</span>
-              <span className="min-w-0 truncate font-mono text-foreground">{folderName(folderPath)}</span>
-            </div>
-          ) : null}
-
-          <div className="flex items-baseline justify-between gap-2 pt-1">
-            <span className="text-xs font-medium text-muted-foreground">
-              {folderPath ? (
-                isSearch ? <>Files in folder matching “{q}”</> : "Files in folder"
-              ) : isSearch ? <>Files matching “{q}”</> : "Recently changed"}
-            </span>
-            <span className="flex items-center gap-1.5 text-[11px] text-muted-foreground">
-              {listQuery.isFetching ? <Loader2 aria-hidden="true" className="h-3 w-3 animate-spin" /> : null}
-              {data?.state === "available" && items.length > 0 ? <span>· {items.length}</span> : null}
-            </span>
-          </div>
-
-          {workspaceLabel ? (
-            <div className="truncate text-[11px] text-muted-foreground" title={workspaceLabel}>
-              From {workspaceLabel}
-            </div>
-          ) : null}
-        </>
-      ) : null}
+      <WorkspaceFileBreadcrumbs
+        rootLabel={selectedProject && selectedWorkspace ? `${selectedProject.name} / ${selectedWorkspace.name}` : workspaceLabel}
+        folderPath={folderPath}
+        onOpenFolder={openFolder}
+      />
 
       <div aria-live="polite" className="sr-only">
         {announcement}