feat(uat-batch-4): a11y form primitives + click-to-preview + EOI empty-state + lint guards

- FieldError primitive (role=alert, aria-live) — used by Wave 3
  form-error UX work.
- FieldLabel primitive (Label + Info-tooltip slot) — foundational for
  the platform-wide admin-settings tooltip audit.
- ESLint guard against em-dash in user-facing JSX text inside
  src/components + src/app (warning, not error; 111 existing instances
  flagged for follow-up sweep).
- FileGrid card body becomes click-to-preview button (was hidden under
  a kebab); aria-label per row; kebab keeps Download/Rename/Delete.
- DocumentList: title cell on rows with signedFileId opens
  FilePreviewDialog; kebab gains Download action (was missing
  per UAT). Single FilePreviewDialog instance lifted to the parent.
- DocumentList type extended with signedFileId.
- EOI empty state: third ghost button "Mark signed without file"
  wired to existing MarkExternallySignedDialog (parity with
  reservation tab).
- Watcher empty-state padding fix on document-detail.

tsc clean. 1419/1419 vitest. lint clean on touched files.

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

eslint.config.mjs

@@ -35,6 +35,24 @@ const eslintConfig = [
       'react-hooks/incompatible-library': 'off',
     },
   },
+  {
+    // User-facing copy in src/components and src/app should never use
+    // em-dashes (—) in JSX text. The user reads em-dashes as a
+    // tell-tale "AI-generated" marker; we prefer periods, commas, or
+    // simple hyphens. Code comments / audit-log strings / templates
+    // outside these directories are exempt.
+    files: ['src/components/**/*.tsx', 'src/app/**/*.tsx'],
+    rules: {
+      'no-restricted-syntax': [
+        'warn',
+        {
+          selector: "JSXText[value=/\\u2014/]",
+          message:
+            'No em-dash in user-facing JSX text. Use period, comma, or hyphen instead.',
+        },
+      ],
+    },
+  },
   {
     // Tests assert response shape via expect() — narrowing every
     // `res.json()` to a structural type adds boilerplate without catching

src/components/documents/document-detail.tsx

@@ -543,7 +543,7 @@ function WatchersCard({ documentId, watchers }: { documentId: string; watchers:
       </p>
 
       {watchers.length === 0 ? (
-        <p className="text-xs text-muted-foreground">No one is watching this document yet.</p>
+        <p className="mb-3 text-xs text-muted-foreground">No one is watching this document yet.</p>
       ) : (
         <ul className="mb-3 space-y-1">
           {watchers.map((w) => {

src/components/documents/document-list.tsx

@@ -1,7 +1,7 @@
 'use client';
 
 import { useState } from 'react';
-import { FolderInput } from 'lucide-react';
+import { Download, FolderInput } from 'lucide-react';
 import { useQueryClient } from '@tanstack/react-query';
 
 import { Badge } from '@/components/ui/badge';
@@ -12,10 +12,12 @@ import {
   DropdownMenuItem,
   DropdownMenuTrigger,
 } from '@/components/ui/dropdown-menu';
+import { FilePreviewDialog } from '@/components/files/file-preview-dialog';
 import { PermissionGate } from '@/components/shared/permission-gate';
 import { usePaginatedQuery } from '@/hooks/use-paginated-query';
 import { useConfirmation } from '@/hooks/use-confirmation';
 import { apiFetch } from '@/lib/api/client';
+import { triggerUrlDownload } from '@/lib/utils/download';
 import { MoveToFolderDialog } from './move-to-folder-dialog';
 
 interface DocumentRow {
@@ -25,6 +27,8 @@ interface DocumentRow {
   status: string;
   createdAt: string;
   folderId: string | null;
+  /** When set, the doc has a downloaded signed PDF the rep can preview/download. */
+  signedFileId?: string | null;
   signers?: Array<{ status: string }>;
 }
 
@@ -57,10 +61,23 @@ interface DocRowProps {
   doc: DocumentRow;
   onDelete: (doc: DocumentRow) => void;
   onSend: (doc: DocumentRow) => void;
+  onPreview: (fileId: string, fileName: string) => void;
 }
 
-function DocRow({ doc, onDelete, onSend }: DocRowProps) {
+async function downloadSignedFile(fileId: string, fallbackName: string) {
+  try {
+    const res = await apiFetch<{ data: { url: string; filename: string } }>(
+      `/api/v1/files/${fileId}/download`,
+    );
+    triggerUrlDownload(res.data.url, res.data.filename || fallbackName);
+  } catch {
+    // silent — toast handled by the presign route on its own
+  }
+}
+
+function DocRow({ doc, onDelete, onSend, onPreview }: DocRowProps) {
   const [moveOpen, setMoveOpen] = useState(false);
+  const hasSignedFile = !!doc.signedFileId;
 
   const signerProgress = (() => {
     if (!doc.signers) return '-';
@@ -74,7 +91,19 @@ function DocRow({ doc, onDelete, onSend }: DocRowProps) {
         <td className="px-4 py-3">
           <Badge variant="outline">{TYPE_LABELS[doc.documentType] ?? doc.documentType}</Badge>
         </td>
-        <td className="px-4 py-3 font-medium">{doc.title}</td>
+        <td className="px-4 py-3 font-medium">
+          {hasSignedFile ? (
+            <button
+              type="button"
+              onClick={() => onPreview(doc.signedFileId!, doc.title)}
+              className="text-left hover:underline focus:outline-none focus:underline"
+            >
+              {doc.title}
+            </button>
+          ) : (
+            doc.title
+          )}
+        </td>
         <td className="px-4 py-3">
           <Badge variant={STATUS_COLORS[doc.status] ?? 'default'}>{doc.status}</Badge>
         </td>
@@ -90,6 +119,12 @@ function DocRow({ doc, onDelete, onSend }: DocRowProps) {
               </Button>
             </DropdownMenuTrigger>
             <DropdownMenuContent align="end">
+              {hasSignedFile && (
+                <DropdownMenuItem onClick={() => downloadSignedFile(doc.signedFileId!, doc.title)}>
+                  <Download className="mr-2 h-4 w-4" aria-hidden />
+                  Download
+                </DropdownMenuItem>
+              )}
               {doc.status === 'draft' && (
                 <DropdownMenuItem onClick={() => onSend(doc)}>Send for Signing</DropdownMenuItem>
               )}
@@ -123,6 +158,7 @@ function DocRow({ doc, onDelete, onSend }: DocRowProps) {
 export function DocumentList({ interestId, clientId, emptyState }: DocumentListProps) {
   const queryClient = useQueryClient();
   const { confirm, dialog: confirmDialog } = useConfirmation();
+  const [previewFile, setPreviewFile] = useState<{ id: string; name: string } | null>(null);
 
   const queryParams = new URLSearchParams();
   if (interestId) queryParams.set('interestId', interestId);
@@ -184,11 +220,25 @@ export function DocumentList({ interestId, clientId, emptyState }: DocumentListP
         </thead>
         <tbody>
           {data.map((doc) => (
-            <DocRow key={doc.id} doc={doc} onDelete={handleDelete} onSend={handleSend} />
+            <DocRow
+              key={doc.id}
+              doc={doc}
+              onDelete={handleDelete}
+              onSend={handleSend}
+              onPreview={(id, name) => setPreviewFile({ id, name })}
+            />
           ))}
         </tbody>
       </table>
       {confirmDialog}
+      <FilePreviewDialog
+        open={!!previewFile}
+        onOpenChange={(o) => {
+          if (!o) setPreviewFile(null);
+        }}
+        fileId={previewFile?.id}
+        fileName={previewFile?.name}
+      />
     </div>
   );
 }

src/components/files/file-grid.tsx

@@ -2,7 +2,6 @@
 
 import {
   Download,
-  Eye,
   FileText,
   Film,
   Image,
@@ -22,7 +21,6 @@ import {
   DropdownMenuTrigger,
 } from '@/components/ui/dropdown-menu';
 import { Skeleton } from '@/components/ui/skeleton';
-import { PREVIEWABLE_MIMES } from '@/lib/constants/file-validation';
 
 export interface FileRow {
   id: string;
@@ -102,9 +100,14 @@ export function FileGrid({
       {files.map((file) => (
         <div
           key={file.id}
-          className="group relative rounded-lg border bg-card p-3 hover:border-primary/50 hover:shadow-sm transition-all"
+          className="group relative rounded-lg border bg-card hover:border-primary/50 hover:shadow-sm transition-all"
         >
-          <div className="flex flex-col items-center gap-2">
+          <button
+            type="button"
+            onClick={() => onPreview(file)}
+            aria-label={`Preview ${file.filename}`}
+            className="flex w-full flex-col items-center gap-2 rounded-lg p-3 text-left focus:outline-none focus:ring-2 focus:ring-ring"
+          >
             <FileIcon mimeType={file.mimeType} />
             <p className="w-full truncate text-center text-xs font-medium" title={file.filename}>
               {file.filename}
@@ -113,7 +116,7 @@ export function FileGrid({
               <span>{formatBytes(file.sizeBytes)}</span>
               <span>{format(new Date(file.createdAt), 'MMM d, yyyy')}</span>
             </div>
-          </div>
+          </button>
 
           <div className="absolute right-1 top-1 opacity-0 group-hover:opacity-100 transition-opacity">
             <DropdownMenu>
@@ -127,12 +130,6 @@ export function FileGrid({
                   <Download className="mr-2 h-3.5 w-3.5" />
                   Download
                 </DropdownMenuItem>
-                {file.mimeType && PREVIEWABLE_MIMES.has(file.mimeType) && (
-                  <DropdownMenuItem onClick={() => onPreview(file)}>
-                    <Eye className="mr-2 h-3.5 w-3.5" />
-                    Preview
-                  </DropdownMenuItem>
-                )}
                 <DropdownMenuItem onClick={() => onRename(file)}>
                   <Pencil className="mr-2 h-3.5 w-3.5" />
                   Rename

src/components/interests/interest-eoi-tab.tsx

@@ -25,6 +25,7 @@ import { Skeleton } from '@/components/ui/skeleton';
 import { EoiCancelDialog } from '@/components/documents/eoi-cancel-dialog';
 import { EoiGenerateDialog } from '@/components/documents/eoi-generate-dialog';
 import { ExternalEoiUploadDialog } from '@/components/interests/external-eoi-upload-dialog';
+import { MarkExternallySignedDialog } from '@/components/interests/mark-externally-signed-dialog';
 import { SigningProgress } from '@/components/documents/signing-progress';
 import { FilePreviewDialog } from '@/components/files/file-preview-dialog';
 import { apiFetch } from '@/lib/api/client';
@@ -104,6 +105,7 @@ export function InterestEoiTab({ interestId, clientId }: InterestEoiTabProps) {
   const portSlug = useUIStore((s) => s.currentPortSlug);
   const [generateOpen, setGenerateOpen] = useState(false);
   const [uploadSignedOpen, setUploadSignedOpen] = useState(false);
+  const [markSignedOpen, setMarkSignedOpen] = useState(false);
   // Lifted preview state so the View button on every signed-PDF row opens
   // the in-app preview dialog rather than navigating to a presigned URL
   // (which the storage backend serves with Content-Disposition=attachment,
@@ -137,6 +139,7 @@ export function InterestEoiTab({ interestId, clientId }: InterestEoiTabProps) {
         <EmptyEoiState
           onGenerate={() => setGenerateOpen(true)}
           onUploadSigned={() => setUploadSignedOpen(true)}
+          onMarkSigned={() => setMarkSignedOpen(true)}
         />
       )}
 
@@ -197,6 +200,13 @@ export function InterestEoiTab({ interestId, clientId }: InterestEoiTabProps) {
         interestId={interestId}
       />
 
+      <MarkExternallySignedDialog
+        open={markSignedOpen}
+        onOpenChange={setMarkSignedOpen}
+        interestId={interestId}
+        docType="eoi"
+      />
+
       <FilePreviewDialog
         open={!!previewFile}
         onOpenChange={(o) => {
@@ -559,9 +569,11 @@ function SignedPdfPreview({ fileId }: { fileId: string }) {
 function EmptyEoiState({
   onGenerate,
   onUploadSigned,
+  onMarkSigned,
 }: {
   onGenerate: () => void;
   onUploadSigned: () => void;
+  onMarkSigned: () => void;
 }) {
   return (
     <section className="rounded-xl border border-dashed bg-muted/20 p-8 text-center">
@@ -572,7 +584,7 @@ function EmptyEoiState({
         No EOI in flight for this interest
       </h2>
       <p className="mt-1 text-sm text-muted-foreground">
-        Generate the EOI to send it for signing — the signing service handles the signing chain. You
+        Generate the EOI to send it for signing. The signing service handles the signing chain. You
         can also upload a paper-signed copy if it was signed outside the system.
       </p>
       <div className="mt-5 flex flex-wrap items-center justify-center gap-2">
@@ -584,6 +596,10 @@ function EmptyEoiState({
           <Upload className="size-4" aria-hidden />
           Upload paper-signed copy
         </Button>
+        <Button onClick={onMarkSigned} variant="ghost" size="sm" className="gap-1.5">
+          <CheckCircle2 className="size-4" aria-hidden />
+          Mark signed without file
+        </Button>
       </div>
     </section>
   );

src/components/ui/field-error.tsx

@@ -0,0 +1,48 @@
+'use client';
+
+import * as React from 'react';
+
+import { cn } from '@/lib/utils';
+
+export interface FieldErrorProps extends React.HTMLAttributes<HTMLParagraphElement> {
+  /**
+   * The error message to render. When falsy the component renders an
+   * empty live region so a screen reader still picks up subsequent
+   * error messages without an aria-live remount.
+   */
+  message?: string | null | undefined;
+  /**
+   * Optional id — pair with `aria-describedby` on the associated input
+   * so SR users hear the error after the input's accessible name.
+   */
+  id?: string;
+}
+
+/**
+ * Accessible error renderer for form fields. Always renders a
+ * `role="alert"` + `aria-live="polite"` region so SR users get
+ * immediate feedback when validation fires. Hide visually when
+ * `message` is empty without removing the region from the DOM —
+ * tearing the live region down between submits delays the next
+ * announcement on most assistive tech.
+ *
+ * Caller is responsible for setting `aria-invalid` and
+ * `aria-describedby={id}` on the linked input.
+ */
+export function FieldError({ message, id, className, ...props }: FieldErrorProps) {
+  return (
+    <p
+      id={id}
+      role="alert"
+      aria-live="polite"
+      className={cn(
+        'text-xs text-destructive',
+        !message && 'sr-only', // empty state keeps the region for next message
+        className,
+      )}
+      {...props}
+    >
+      {message ?? ''}
+    </p>
+  );
+}

src/components/ui/field-label.tsx

@@ -0,0 +1,66 @@
+'use client';
+
+import * as React from 'react';
+import { Info } from 'lucide-react';
+
+import { Label } from '@/components/ui/label';
+import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip';
+import { cn } from '@/lib/utils';
+
+export interface FieldLabelProps extends React.ComponentPropsWithoutRef<typeof Label> {
+  /**
+   * Optional explainer copy. When set, an Info icon is rendered next
+   * to the label that opens a Tooltip on hover / focus. Tooltip writing
+   * guidelines: 1-2 sentences max; state the unit ("...in days",
+   * "...in MB"); lead with the risk for dangerous settings; explain the
+   * "why and how to choose a value" rather than restating the label.
+   */
+  tooltip?: React.ReactNode;
+  /** Mark the field as required — appends an asterisk after the label text. */
+  required?: boolean;
+}
+
+/**
+ * Shared label-with-explainer primitive for admin forms. Wraps the
+ * shadcn Label + an optional Info-tooltip slot. Adopting this everywhere
+ * an admin setting needs a non-obvious explainer (Sort Order, Weight,
+ * TTL, Cap, Confidence, Threshold) gives admins consistent tooltip UX
+ * without per-form bespoke implementations.
+ */
+export function FieldLabel({
+  tooltip,
+  required,
+  className,
+  children,
+  ...labelProps
+}: FieldLabelProps) {
+  if (!tooltip) {
+    return (
+      <Label className={cn('inline-flex items-center gap-1.5', className)} {...labelProps}>
+        {children}
+        {required ? <span aria-hidden>*</span> : null}
+      </Label>
+    );
+  }
+
+  return (
+    <Label className={cn('inline-flex items-center gap-1.5', className)} {...labelProps}>
+      {children}
+      {required ? <span aria-hidden>*</span> : null}
+      <TooltipProvider delayDuration={200}>
+        <Tooltip>
+          <TooltipTrigger asChild>
+            <button
+              type="button"
+              aria-label="More info"
+              className="text-muted-foreground hover:text-foreground focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 rounded-sm"
+            >
+              <Info className="h-3.5 w-3.5" aria-hidden />
+            </button>
+          </TooltipTrigger>
+          <TooltipContent className="max-w-xs text-xs leading-relaxed">{tooltip}</TooltipContent>
+        </Tooltip>
+      </TooltipProvider>
+    </Label>
+  );
+}