feat(documents): rebuild hub — root view + entity-folder view

Three rendering modes for the main panel:
  - HubRootView (no folder selected): port-wide Signing + recent Files.
  - EntityFolderView (system-managed entity subfolder selected):
    AggregatedSection × 2 with owner-grouped subsections + per-row
    "view signing details" link on signed files (heuristic: filename
    starts with "signed-"; follow-up: surface signedFromDocumentId
    from the aggregated API).
  - FlatFolderListing (any other folder): existing search + chips + list.

Drops the signing-status tab strip (in_progress / awaiting_them / etc.)
— folders are the primary navigation now. hub-counts query removed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/documents/documents-hub.tsx

@@ -2,24 +2,24 @@
 
 import { useMemo, useState } from 'react';
 import Link from 'next/link';
-import { useQuery } from '@tanstack/react-query';
 import { ChevronDown, ChevronRight, FileText, Plus } from 'lucide-react';
 
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { cn } from '@/lib/utils';
-import { Tabs, TabsList, TabsTrigger } from '@/components/ui/tabs';
 import { StatusPill, type StatusPillStatus } from '@/components/ui/status-pill';
 import { EmptyState } from '@/components/ui/empty-state';
 import { PageHeader } from '@/components/shared/page-header';
 import { PermissionGate } from '@/components/shared/permission-gate';
 import { usePaginatedQuery } from '@/hooks/use-paginated-query';
 import { useRealtimeInvalidation } from '@/hooks/use-realtime-invalidation';
-import { apiFetch } from '@/lib/api/client';
-import { documentsHubTabs, type DocumentsHubTab } from '@/lib/validators/documents';
+import { useDocumentFolders, type FolderNode } from '@/hooks/use-document-folders';
+import type { DocumentsHubTab } from '@/lib/validators/documents';
 import { FolderActionsMenu } from './folder-actions-menu';
 import { FolderBreadcrumb } from './folder-breadcrumb';
 import { FolderTreeSidebar } from './folder-tree-sidebar';
+import { HubRootView } from './hub-root-view';
+import { EntityFolderView } from './entity-folder-view';
 
 interface HubDoc {
   id: string;
@@ -30,26 +30,6 @@ interface HubDoc {
   signers?: Array<{ id: string; signerEmail: string; signerName: string; status: string }>;
 }
 
-interface HubCounts {
-  all: number;
-  in_progress: number;
-  eoi_queue: number;
-  awaiting_them: number;
-  awaiting_me: number;
-  completed: number;
-  expired: number;
-}
-
-const TAB_LABELS: Record<DocumentsHubTab, string> = {
-  all: 'All',
-  in_progress: 'In progress',
-  eoi_queue: 'EOI queue',
-  awaiting_them: 'Awaiting them',
-  awaiting_me: 'Awaiting me',
-  completed: 'Completed',
-  expired: 'Expired',
-};
-
 const TYPE_LABELS: Record<string, string> = {
   eoi: 'EOI',
   contract: 'Contract',
@@ -87,45 +67,113 @@ interface DocumentsHubProps {
   initialTab?: DocumentsHubTab;
 }
 
-export function DocumentsHub({ portSlug, initialTab = 'all' }: DocumentsHubProps) {
-  const [tab, setTab] = useState<DocumentsHubTab>(initialTab);
+function findInTree(nodes: FolderNode[], id: string): FolderNode | null {
+  for (const n of nodes) {
+    if (n.id === id) return n;
+    const found = findInTree(n.children, id);
+    if (found) return found;
+  }
+  return null;
+}
+
+export function DocumentsHub({ portSlug }: DocumentsHubProps) {
+  // undefined = "All documents" (no folder selected / hub root)
+  // null = root folder only
+  // string = specific folder id
+  const [selectedFolderId, setSelectedFolderId] = useState<string | null | undefined>(undefined);
+
+  const { data: tree = [] } = useDocumentFolders();
+
+  const selectedFolder =
+    typeof selectedFolderId === 'string' ? findInTree(tree, selectedFolderId) : null;
+
+  const isEntityFolder =
+    selectedFolder?.systemManaged === true &&
+    selectedFolder.entityType != null &&
+    selectedFolder.entityType !== 'root' &&
+    selectedFolder.entityId != null;
+
+  const handleFolderSelect = (id: string | null | undefined) => {
+    setSelectedFolderId(id);
+  };
+
+  return (
+    <div className="flex flex-col sm:flex-row h-full">
+      <FolderTreeSidebar
+        selectedFolderId={selectedFolderId}
+        onSelect={handleFolderSelect}
+        footer={
+          <PermissionGate resource="documents" action="manage_folders">
+            <FolderActionsMenu
+              selectedFolderId={selectedFolderId}
+              onAfterDelete={() => handleFolderSelect(undefined)}
+            />
+          </PermissionGate>
+        }
+      />
+      <div className="flex-1 min-w-0 p-4 space-y-4">
+        <FolderBreadcrumb selectedFolderId={selectedFolderId} onSelect={handleFolderSelect} />
+
+        <PageHeader
+          title="Documents"
+          description="Track signing status, chase pending signers, and audit completion."
+          actions={
+            <Button asChild>
+              <Link href={`/${portSlug}/documents/new`}>
+                <Plus className="mr-1.5 h-4 w-4" />
+                New document
+              </Link>
+            </Button>
+          }
+          variant="gradient"
+        />
+
+        {selectedFolderId === undefined ? (
+          <HubRootView portSlug={portSlug} />
+        ) : isEntityFolder ? (
+          <EntityFolderView
+            portSlug={portSlug}
+            entityType={selectedFolder!.entityType as 'client' | 'company' | 'yacht'}
+            entityId={selectedFolder!.entityId!}
+          />
+        ) : (
+          <FlatFolderListing portSlug={portSlug} folderId={selectedFolderId} />
+        )}
+      </div>
+    </div>
+  );
+}
+
+// ---------------------------------------------------------------------------
+// FlatFolderListing — the original search + type-chip + document rows panel,
+// now scoped to a specific folder (or null for root-only).
+// ---------------------------------------------------------------------------
+
+interface FlatFolderListingProps {
+  portSlug: string;
+  folderId: string | null;
+}
+
+function FlatFolderListing({ portSlug, folderId }: FlatFolderListingProps) {
   const [search, setSearch] = useState('');
   const [typeFilter, setTypeFilter] = useState<string | undefined>(undefined);
-  // undefined = "All documents" (no folder filter), null = root only,
-  // string = a specific folder id.
-  const [selectedFolderId, setSelectedFolderId] = useState<string | null | undefined>(undefined);
   const [expandedDocId, setExpandedDocId] = useState<string | null>(null);
 
   const queryParams = useMemo(() => {
     const params = new URLSearchParams();
-    params.set('tab', tab);
     if (search) params.set('search', search);
     if (typeFilter) params.set('documentType', typeFilter);
-    if (selectedFolderId !== undefined) {
-      params.set('folderId', selectedFolderId ?? '');
-    }
+    // folderId null = root, string = specific folder
+    params.set('folderId', folderId ?? '');
     return params;
-  }, [tab, search, typeFilter, selectedFolderId]);
+  }, [search, typeFilter, folderId]);
 
   const { data: documents, isLoading } = usePaginatedQuery<HubDoc>({
-    queryKey: ['documents', 'hub', queryParams.toString()],
+    queryKey: ['documents', 'hub', 'folder', queryParams.toString()],
     endpoint: `/api/v1/documents?${queryParams.toString()}`,
     filterDefinitions: [],
   });
 
-  const { data: countsResp } = useQuery<{ data: HubCounts }>({
-    queryKey: ['documents', 'hub-counts'],
-    queryFn: () => apiFetch<{ data: HubCounts }>('/api/v1/documents/hub-counts'),
-    staleTime: 30_000,
-  });
-
-  const { data: flagsResp } = useQuery<{ data: { showExpiredTab: boolean } }>({
-    queryKey: ['documents-feature-flags'],
-    queryFn: () => apiFetch('/api/v1/documents/feature-flags'),
-    staleTime: 5 * 60 * 1000,
-  });
-  const showExpiredTab = flagsResp?.data?.showExpiredTab ?? true;
-
   useRealtimeInvalidation({
     'document:created': [['documents']],
     'document:updated': [['documents']],
@@ -138,16 +186,6 @@ export function DocumentsHub({ portSlug, initialTab = 'all' }: DocumentsHubProps
     'document:signer:signed': [['documents']],
   });
 
-  const counts: HubCounts = countsResp?.data ?? {
-    all: 0,
-    in_progress: 0,
-    eoi_queue: 0,
-    awaiting_them: 0,
-    awaiting_me: 0,
-    completed: 0,
-    expired: 0,
-  };
-
   const renderRow = (doc: HubDoc) => {
     const expanded = expandedDocId === doc.id;
     const totalSigners = doc.signers?.length ?? 0;
@@ -218,51 +256,59 @@ export function DocumentsHub({ portSlug, initialTab = 'all' }: DocumentsHubProps
     );
   };
 
-  const handleFolderSelect = (id: string | null | undefined) => {
-    setSelectedFolderId(id);
-    setTypeFilter(undefined);
-  };
-
   return (
-    <div className="flex flex-col sm:flex-row h-full">
-      <FolderTreeSidebar
-        selectedFolderId={selectedFolderId}
-        onSelect={handleFolderSelect}
-        footer={
-          <PermissionGate resource="documents" action="manage_folders">
-            <FolderActionsMenu
-              selectedFolderId={selectedFolderId}
-              onAfterDelete={() => handleFolderSelect(undefined)}
-            />
-          </PermissionGate>
-        }
-      />
-      <div className="flex-1 min-w-0 p-4 space-y-4">
-        <FolderBreadcrumb selectedFolderId={selectedFolderId} onSelect={handleFolderSelect} />
+    <>
+      <div className="flex flex-wrap items-center gap-2">
+        <Input
+          placeholder="Search by title..."
+          value={search}
+          onChange={(e) => setSearch(e.target.value)}
+          className="max-w-xs h-9"
+        />
+        {(() => {
+          const seenTypes = Array.from(new Set(documents.map((d) => d.documentType))).sort();
+          if (seenTypes.length === 0) return null;
+          return (
+            <div className="flex flex-wrap gap-1.5">
+              <button
+                type="button"
+                className={cn(
+                  'rounded-full border px-2.5 py-0.5 text-xs',
+                  typeFilter === undefined ? 'bg-foreground text-background' : 'hover:bg-accent',
+                )}
+                onClick={() => setTypeFilter(undefined)}
+              >
+                All types
+              </button>
+              {seenTypes.map((t) => (
+                <button
+                  type="button"
+                  key={t}
+                  className={cn(
+                    'rounded-full border px-2.5 py-0.5 text-xs',
+                    typeFilter === t ? 'bg-foreground text-background' : 'hover:bg-accent',
+                  )}
+                  onClick={() => setTypeFilter(t)}
+                >
+                  {TYPE_LABELS[t] ?? t}
+                </button>
+              ))}
+            </div>
+          );
+        })()}
+      </div>
 
-        <PageHeader
-          title="Documents"
-          description="Track signing status, chase pending signers, and audit completion."
-          kpiLine={
-            <>
-              <span>
-                <strong className="font-semibold text-foreground tabular-nums">{counts.all}</strong>{' '}
-                total
-              </span>
-              <span>
-                <strong className="font-semibold text-foreground tabular-nums">
-                  {counts.awaiting_them}
-                </strong>{' '}
-                awaiting signers
-              </span>
-              <span>
-                <strong className="font-semibold text-foreground tabular-nums">
-                  {counts.awaiting_me}
-                </strong>{' '}
-                awaiting you
-              </span>
-            </>
-          }
+      {isLoading ? (
+        <ul className="rounded-md border bg-white">
+          {[0, 1, 2, 3, 4].map((i) => (
+            <li key={i} className="h-12 animate-pulse border-b last:border-b-0 bg-muted/40" />
+          ))}
+        </ul>
+      ) : documents.length === 0 ? (
+        <EmptyState
+          icon={<FileText className="h-7 w-7" />}
+          title="No documents in this folder"
+          body="Create a document or move existing ones here."
           actions={
             <Button asChild>
               <Link href={`/${portSlug}/documents/new`}>
@@ -271,102 +317,10 @@ export function DocumentsHub({ portSlug, initialTab = 'all' }: DocumentsHubProps
               </Link>
             </Button>
           }
-          variant="gradient"
         />
-
-        <Tabs
-          value={tab}
-          onValueChange={(v) => {
-            setTab(v as DocumentsHubTab);
-            setTypeFilter(undefined);
-          }}
-        >
-          <TabsList>
-            {documentsHubTabs
-              .filter((t) => t !== 'expired' || showExpiredTab)
-              .map((t) => (
-                <TabsTrigger key={t} value={t}>
-                  {TAB_LABELS[t]}
-                  {t !== 'all' && counts[t] > 0 ? (
-                    <span className="ml-1.5 rounded-full bg-muted px-1.5 py-0.5 text-[0.65rem] text-muted-foreground">
-                      {counts[t]}
-                    </span>
-                  ) : null}
-                </TabsTrigger>
-              ))}
-          </TabsList>
-        </Tabs>
-
-        <div className="flex flex-wrap items-center gap-2">
-          <Input
-            placeholder="Search by title…"
-            value={search}
-            onChange={(e) => setSearch(e.target.value)}
-            className="max-w-xs h-9"
-          />
-          {(() => {
-            const seenTypes = Array.from(new Set(documents.map((d) => d.documentType))).sort();
-            if (seenTypes.length === 0) return null;
-            return (
-              <div className="flex flex-wrap gap-1.5">
-                <button
-                  type="button"
-                  className={cn(
-                    'rounded-full border px-2.5 py-0.5 text-xs',
-                    typeFilter === undefined ? 'bg-foreground text-background' : 'hover:bg-accent',
-                  )}
-                  onClick={() => setTypeFilter(undefined)}
-                >
-                  All types
-                </button>
-                {seenTypes.map((t) => (
-                  <button
-                    type="button"
-                    key={t}
-                    className={cn(
-                      'rounded-full border px-2.5 py-0.5 text-xs',
-                      typeFilter === t ? 'bg-foreground text-background' : 'hover:bg-accent',
-                    )}
-                    onClick={() => setTypeFilter(t)}
-                  >
-                    {TYPE_LABELS[t] ?? t}
-                  </button>
-                ))}
-              </div>
-            );
-          })()}
-        </div>
-
-        {isLoading ? (
-          <ul className="rounded-md border bg-white">
-            {[0, 1, 2, 3, 4].map((i) => (
-              <li key={i} className="h-12 animate-pulse border-b last:border-b-0 bg-muted/40" />
-            ))}
-          </ul>
-        ) : documents.length === 0 ? (
-          <EmptyState
-            icon={<FileText className="h-7 w-7" />}
-            title={tab === 'all' ? 'No documents yet' : 'No documents match this view'}
-            body={
-              tab === 'all'
-                ? 'Create your first document to track signing across signers and watchers.'
-                : 'Try a different tab or clear filters.'
-            }
-            actions={
-              tab === 'all' ? (
-                <Button asChild>
-                  <Link href={`/${portSlug}/documents/new`}>
-                    <Plus className="mr-1.5 h-4 w-4" />
-                    New document
-                  </Link>
-                </Button>
-              ) : null
-            }
-          />
-        ) : (
-          <ul className="rounded-md border bg-white shadow-xs">{documents.map(renderRow)}</ul>
-        )}
-      </div>
-    </div>
+      ) : (
+        <ul className="rounded-md border bg-white shadow-xs">{documents.map(renderRow)}</ul>
+      )}
+    </>
   );
 }