Export/import UX polish: search, scroll, sort, null cleanup

Export page:
- Sort files before directories so PROJECT.md appears above tasks/
- Tasks unchecked by default (only agents, projects, skills checked)
- Add inline search input to filter files in the tree
- Checked files sort above unchecked for easier scanning
- Sidebar scrolls independently from content preview pane

Import page:
- Match file-before-dir sort order
- Independent sidebar/content scrolling
- Skip null values in frontmatter preview

Backend:
- Skip null/undefined fields in exported frontmatter (no more
  "owner: null" in PROJECT.md files)

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

server/src/services/company-portability.ts

@@ -580,8 +580,9 @@ function renderYamlBlock(value: unknown, indentLevel: number): string[] {
 function renderFrontmatter(frontmatter: Record<string, unknown>) {
   const lines: string[] = ["---"];
   for (const [key, value] of orderedYamlEntries(frontmatter)) {
+    // Skip null/undefined values — don't export empty fields
+    if (value === null || value === undefined) continue;
     const scalar =
-      value === null ||
       typeof value === "string" ||
       typeof value === "boolean" ||
       typeof value === "number" ||

ui/src/pages/CompanyExport.tsx

@@ -20,6 +20,7 @@ import {
   FolderOpen,
   Info,
   Package,
+  Search,
 } from "lucide-react";
 
 // ── Tree types ────────────────────────────────────────────────────────
@@ -64,7 +65,8 @@ function buildFileTree(files: Record<string, string>): FileTreeNode[] {
 
   function sortNode(node: FileTreeNode) {
     node.children.sort((a, b) => {
-      if (a.kind !== b.kind) return a.kind === "dir" ? -1 : 1;
+      // Files before directories so PROJECT.md appears above tasks/
+      if (a.kind !== b.kind) return a.kind === "file" ? -1 : 1;
       return a.name.localeCompare(b.name);
     });
     node.children.forEach(sortNode);
@@ -100,6 +102,48 @@ function fileIcon(name: string) {
   return FileText;
 }
 
+/** Returns true if the path looks like a task file (e.g. tasks/slug/TASK.md or projects/x/tasks/slug/TASK.md) */
+function isTaskPath(filePath: string): boolean {
+  return /(?:^|\/)tasks\//.test(filePath);
+}
+
+/** Filter tree nodes whose path (or descendant paths) match a search string */
+function filterTree(nodes: FileTreeNode[], query: string): FileTreeNode[] {
+  if (!query) return nodes;
+  const lower = query.toLowerCase();
+  return nodes
+    .map((node) => {
+      if (node.kind === "file") {
+        return node.name.toLowerCase().includes(lower) || node.path.toLowerCase().includes(lower)
+          ? node
+          : null;
+      }
+      const filteredChildren = filterTree(node.children, query);
+      return filteredChildren.length > 0
+        ? { ...node, children: filteredChildren }
+        : null;
+    })
+    .filter((n): n is FileTreeNode => n !== null);
+}
+
+/** Sort tree: checked files first, then unchecked */
+function sortByChecked(nodes: FileTreeNode[], checkedFiles: Set<string>): FileTreeNode[] {
+  return nodes.map((node) => {
+    if (node.kind === "dir") {
+      return { ...node, children: sortByChecked(node.children, checkedFiles) };
+    }
+    return node;
+  }).sort((a, b) => {
+    if (a.kind !== b.kind) return a.kind === "file" ? -1 : 1;
+    if (a.kind === "file" && b.kind === "file") {
+      const aChecked = checkedFiles.has(a.path);
+      const bChecked = checkedFiles.has(b.path);
+      if (aChecked !== bChecked) return aChecked ? -1 : 1;
+    }
+    return a.name.localeCompare(b.name);
+  });
+}
+
 // ── Tar helpers (reused from CompanySettings) ─────────────────────────
 
 function createTarArchive(files: Record<string, string>, rootPath: string): Uint8Array {
@@ -345,6 +389,11 @@ function parseFrontmatter(content: string): { data: FrontmatterData; body: strin
     if (kvMatch) {
       const key = kvMatch[1];
       const val = kvMatch[2].trim().replace(/^["']|["']$/g, "");
+      // Skip null values
+      if (val === "null") {
+        currentKey = null;
+        continue;
+      }
       if (val) {
         data[key] = val;
         currentKey = null;
@@ -460,6 +509,7 @@ export function CompanyExport() {
   const [selectedFile, setSelectedFile] = useState<string | null>(null);
   const [expandedDirs, setExpandedDirs] = useState<Set<string>>(new Set());
   const [checkedFiles, setCheckedFiles] = useState<Set<string>>(new Set());
+  const [treeSearch, setTreeSearch] = useState("");
 
   useEffect(() => {
     setBreadcrumbs([
@@ -476,9 +526,12 @@ export function CompanyExport() {
       }),
     onSuccess: (result) => {
       setExportData(result);
-      // Check all files by default
-      const allFiles = new Set(Object.keys(result.files));
-      setCheckedFiles(allFiles);
+      // Check all files EXCEPT tasks by default
+      const checked = new Set<string>();
+      for (const filePath of Object.keys(result.files)) {
+        if (!isTaskPath(filePath)) checked.add(filePath);
+      }
+      setCheckedFiles(checked);
       // Expand top-level dirs
       const tree = buildFileTree(result.files);
       const topDirs = new Set<string>();
@@ -512,6 +565,12 @@ export function CompanyExport() {
     [exportData],
   );
 
+  const displayTree = useMemo(() => {
+    let result = tree;
+    if (treeSearch) result = filterTree(result, treeSearch);
+    return sortByChecked(result, checkedFiles);
+  }, [tree, treeSearch, checkedFiles]);
+
   const totalFiles = useMemo(() => countFiles(tree), [tree]);
   const selectedCount = checkedFiles.size;
 
@@ -656,25 +715,39 @@ export function CompanyExport() {
       )}
 
       {/* Two-column layout */}
-      <div className="grid min-h-[calc(100vh-12rem)] gap-0 xl:grid-cols-[19rem_minmax(0,1fr)]">
-        <aside className="border-r border-border">
-          <div className="border-b border-border px-4 py-3">
+      <div className="grid h-[calc(100vh-12rem)] gap-0 xl:grid-cols-[19rem_minmax(0,1fr)]">
+        <aside className="flex flex-col border-r border-border overflow-hidden">
+          <div className="border-b border-border px-4 py-3 shrink-0">
             <h2 className="text-base font-semibold">Package files</h2>
             <p className="text-xs text-muted-foreground">
               {totalFiles} file{totalFiles === 1 ? "" : "s"} in {exportData.rootPath}
             </p>
           </div>
-          <ExportFileTree
-            nodes={tree}
-            selectedFile={selectedFile}
-            expandedDirs={expandedDirs}
-            checkedFiles={checkedFiles}
-            onToggleDir={handleToggleDir}
-            onSelectFile={setSelectedFile}
-            onToggleCheck={handleToggleCheck}
-          />
+          <div className="border-b border-border px-3 py-2 shrink-0">
+            <div className="flex items-center gap-2 rounded-md border border-border px-2 py-1">
+              <Search className="h-3.5 w-3.5 text-muted-foreground shrink-0" />
+              <input
+                type="text"
+                value={treeSearch}
+                onChange={(e) => setTreeSearch(e.target.value)}
+                placeholder="Search files..."
+                className="w-full bg-transparent text-sm outline-none placeholder:text-muted-foreground"
+              />
+            </div>
+          </div>
+          <div className="flex-1 overflow-y-auto">
+            <ExportFileTree
+              nodes={displayTree}
+              selectedFile={selectedFile}
+              expandedDirs={expandedDirs}
+              checkedFiles={checkedFiles}
+              onToggleDir={handleToggleDir}
+              onSelectFile={setSelectedFile}
+              onToggleCheck={handleToggleCheck}
+            />
+          </div>
         </aside>
-        <div className="min-w-0 pl-6">
+        <div className="min-w-0 overflow-y-auto pl-6">
           <ExportPreviewPane selectedFile={selectedFile} content={previewContent} />
         </div>
       </div>

ui/src/pages/CompanyImport.tsx

@@ -73,7 +73,7 @@ function buildFileTree(files: Record<string, string>, actionMap: Map<string, str
 
   function sortNode(node: FileTreeNode) {
     node.children.sort((a, b) => {
-      if (a.kind !== b.kind) return a.kind === "dir" ? -1 : 1;
+      if (a.kind !== b.kind) return a.kind === "file" ? -1 : 1;
       return a.name.localeCompare(b.name);
     });
     node.children.forEach(sortNode);
@@ -204,6 +204,10 @@ function parseFrontmatter(content: string): { data: FrontmatterData; body: strin
     if (kvMatch) {
       const key = kvMatch[1];
       const val = kvMatch[2].trim().replace(/^["']|["']$/g, "");
+      if (val === "null") {
+        currentKey = null;
+        continue;
+      }
       if (val) {
         data[key] = val;
         currentKey = null;
@@ -918,9 +922,9 @@ export function CompanyImport() {
           )}
 
           {/* Two-column layout */}
-          <div className="grid min-h-[calc(100vh-16rem)] gap-0 xl:grid-cols-[19rem_minmax(0,1fr)]">
-            <aside className="border-r border-border">
-              <div className="border-b border-border px-4 py-3">
+          <div className="grid h-[calc(100vh-16rem)] gap-0 xl:grid-cols-[19rem_minmax(0,1fr)]">
+            <aside className="flex flex-col border-r border-border overflow-hidden">
+              <div className="border-b border-border px-4 py-3 shrink-0">
                 <h2 className="text-base font-semibold">Package files</h2>
                 <p className="text-xs text-muted-foreground">
                   {totalFiles} file{totalFiles === 1 ? "" : "s"} &middot;
@@ -930,17 +934,19 @@ export function CompanyImport() {
                   {" "}{importPreview.plan.issuePlans.length} task{importPreview.plan.issuePlans.length === 1 ? "" : "s"}
                 </p>
               </div>
-              <ImportFileTree
-                nodes={tree}
-                selectedFile={selectedFile}
-                expandedDirs={expandedDirs}
-                checkedFiles={checkedFiles}
-                onToggleDir={handleToggleDir}
-                onSelectFile={setSelectedFile}
-                onToggleCheck={handleToggleCheck}
-              />
+              <div className="flex-1 overflow-y-auto">
+                <ImportFileTree
+                  nodes={tree}
+                  selectedFile={selectedFile}
+                  expandedDirs={expandedDirs}
+                  checkedFiles={checkedFiles}
+                  onToggleDir={handleToggleDir}
+                  onSelectFile={setSelectedFile}
+                  onToggleCheck={handleToggleCheck}
+                />
+              </div>
             </aside>
-            <div className="min-w-0 pl-6">
+            <div className="min-w-0 overflow-y-auto pl-6">
               <ImportPreviewPane
                 selectedFile={selectedFile}
                 content={previewContent}