folder in summary

frontend/src/documents/DocumentSummarySection.tsx

@@ -1,4 +1,5 @@
 import React, { useCallback, useEffect, useMemo, useState, type FormEvent } from 'react';
+import { Link } from 'react-router-dom';
 import { EditIcon, IconX, CheckIcon, PlusIcon } from '../ui/icons';
 import SelectionAssignmentMenu, {
   SelectionAssignmentMenuItem,
@@ -12,6 +13,7 @@ import {
 } from '../utils/date';
 import { describeDocumentSummary, type DocumentSummaryRow } from './documentSummary';
 import { isPlainObject } from '../utils/typeGuards';
+import { useFolderManager } from '../folders/FolderManagerContext';
 
 type Identifier = string | number;
 
@@ -31,6 +33,7 @@ interface DocumentLike {
   id?: Identifier;
   title?: string;
   issued_at?: string | null;
+  folder_id?: string | null;
   current_version?: { version_number?: number } | null;
   tags?: TagEntry[];
   correspondents?: CorrespondentEntry[];
@@ -71,6 +74,7 @@ export interface DocumentSummarySectionProps {
   onCorrespondentRemove?: (payload: { documentId: Identifier | undefined; correspondentId: Identifier | undefined }) => void;
   onUpdateTitle?: (docId: Identifier | undefined, title: string) => Promise<boolean> | boolean;
   onUpdateIssued?: (docId: Identifier | undefined, timestamp: number | null) => Promise<boolean> | boolean;
+  onFolderNavigate?: (folderId: string | null) => void;
   layout?: 'default' | 'compact';
 }
 
@@ -456,8 +460,10 @@ const DocumentSummarySection: React.FC<DocumentSummarySectionProps> = ({
   onCorrespondentRemove,
   onUpdateTitle,
   onUpdateIssued,
+  onFolderNavigate,
   layout = 'default',
 }) => {
+  const folderManager = useFolderManager();
   const isCompactLayout = layout === 'compact';
   const summaryRows = useMemo(() => describeDocumentSummary(document), [document]);
   const issuedDateLabel = useMemo(
@@ -499,6 +505,39 @@ const DocumentSummarySection: React.FC<DocumentSummarySectionProps> = ({
     return rows;
   }, [document?.current_version?.version_number]);
 
+  const resolvedFolderId = document?.folder_id ?? null;
+
+  const [folderName, setFolderName] = useState<string | null>(() => folderManager.getNameSync(resolvedFolderId));
+
+  useEffect(() => {
+    let active = true;
+    const cached = folderManager.getNameSync(resolvedFolderId);
+    setFolderName(cached);
+    if (!cached && resolvedFolderId != null) {
+      folderManager.resolveName(resolvedFolderId).then((name) => {
+        if (active) {
+          setFolderName(name);
+        }
+      }).catch(() => {});
+    }
+    return () => {
+      active = false;
+    };
+  }, [resolvedFolderId, folderManager]);
+
+  const folderHref = resolvedFolderId == null ? '/documents' : `/documents/folder/${resolvedFolderId}`;
+
+  const handleFolderClick = useCallback(
+    (event: React.MouseEvent) => {
+      if (!onFolderNavigate) {
+        return;
+      }
+      event.preventDefault();
+      onFolderNavigate(resolvedFolderId);
+    },
+    [onFolderNavigate, resolvedFolderId],
+  );
+
   const [titleDraft, setTitleDraft] = useState('');
   const [titleSaving, setTitleSaving] = useState(false);
   const [titleError, setTitleError] = useState(null);
@@ -741,11 +780,22 @@ const DocumentSummarySection: React.FC<DocumentSummarySectionProps> = ({
     />
   );
 
+  const folderValueContent = (
+    <Link
+      className="document-summary__folder-link"
+      to={folderHref}
+      onClick={handleFolderClick}
+    >
+      {folderName}
+    </Link>
+  );
+
   const summaryRowOverrides = {
     title: { valueContent: titleMetaDisplay, error: titleError },
     issued: { valueContent: issuedDisplay, error: issuedError },
     tags: { valueContent: tagsValueContent },
     correspondents: { valueContent: correspondentsValueContent },
+    folder: { valueContent: folderValueContent },
   } as Record<string, { valueContent?: React.ReactNode | null; error?: string | null }>;
 
   const baseRows: MetaItem[] = [...summaryRows, ...extraSummaryRows].map((row) => {