fix(audit): A1/A2/A4/A6/A8/A9/A16/A17/A19/A20 from 2026-05-15 sweep

Knocks out 10 of the 13 known issues from yesterday's Playwright audit.

A4 — Client form silently rejected submit when a contact row had an
empty value. The F19 filter ran in mutationFn after zod's
handleSubmit had already short-circuited on min(1). Now wraps the
onSubmit to prune empty rows BEFORE handleSubmit/zod sees them.

A16 — File upload to documents hub root 400'd because FormData.get
returns null for absent fields and zod's .optional() rejects null.
Route handler now coerces null/empty → undefined before parse.

A17 — Added /api/v1/me/ports endpoint that any authenticated user
can hit; client.ts now uses it as the bootstrap port-slug→port-id
resolver. Eliminates the wasteful 400s sales-reps and viewers were
firing on every page load against the super-admin-gated /admin/ports.

A1 — Filter permission_denied actions from the dashboard activity
feed. Still in the audit log; just not noise on the dashboard.

A2 — New LEGACY_STAGE_REMAP table + canonicalizeStage / stageLabelFor
helpers in lib/constants. Activity-feed maps legacy 9-stage enum
values (deposit_10pct, contract_sent, etc.) to their 7-stage labels
on the way out, so historical audit rows read as "Deposit Paid" not
"Deposit 10Pct".

A19 — Same-stage write now returns 204 No Content. Service returns
a STAGE_NOOP sentinel; the route handler translates it.

A9 — Catch-up wizard now derives stage from berth status (under_offer
→ EOI, sold → contract) with a stageOverride state for explicit
user picks. Avoids the set-state-in-effect rule violation.

A20 — OwnerPicker shows a "Client / Company" hint chip on the
trigger when no value is set, so users know the trigger opens a
two-tab picker instead of just a client list.

A8 — Migration 0066 normalizes legacy `statusOverrideMode = 'auto'`
to NULL so the column lives at strictly 3 states.

A6 — file-preview-dialog gets a screen-reader DialogDescription so
the Radix "Missing aria-describedby" warning stops firing on every
preview.

A18 closed as not-a-bug: /api/v1/users genuinely doesn't exist
(Next returns 404); /api/v1/admin/audit exists and 403s.

A5 (Socket.IO dev noise) + A3 (react-grab CSP) left for a separate
pass — both are dev-only cosmetic.

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

src/components/files/file-preview-dialog.tsx

@@ -5,7 +5,13 @@ import dynamic from 'next/dynamic';
 import { ExternalLink, ZoomIn } from 'lucide-react';
 import { useQuery } from '@tanstack/react-query';
 
-import { Dialog, DialogContent, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog';
 import { apiFetch } from '@/lib/api/client';
 
 // yet-another-react-lightbox is ~50kb, lazy-load it.
@@ -71,6 +77,12 @@ export function FilePreviewDialog({
               </a>
             )}
           </DialogTitle>
+          {/* A6: screen-reader description; visually hidden because the
+           *  title + preview surface tells sighted users what the dialog
+           *  contains. Skips the Radix "missing aria-describedby" warning. */}
+          <DialogDescription className="sr-only">
+            Inline preview of {fileName ?? 'the selected file'}.
+          </DialogDescription>
         </DialogHeader>
 
         <div className="flex-1 overflow-hidden rounded-lg border bg-muted/20">