fix(audit-final): pre-merge hardening + expense receipt UI

Final audit pass on feat/berth-recommender (3 parallel Opus agents)
caught 5 critical and ~12 high-severity findings. All addressed in-branch;
medium/low items deferred to docs/audit-final-deferred.md.

Critical:
- Add filesystem-backend PUT handler at /api/storage/[token] so
  presigned uploads stop 405-ing in filesystem mode (every browser-driven
  berth-PDF + brochure upload was broken). Same token-verify + replay
  protection as GET, plus magic-byte gate when c=application/pdf.
- Forward req.signal into streamExpensePdf so an aborted 1000-receipt
  export no longer keeps grinding for minutes.
- Strengthen Content-Disposition filename sanitization: \s matches CR/LF
  which would let documentName forge headers; restrict to [\w. -]+ and
  add filename* RFC 5987 fallback.
- Lock public berths feed behind an explicit slug allowlist instead of
  ?portSlug= enumeration.
- Reject cross-port interest_berths upserts (defense-in-depth on top of
  the recommender SQL port filter).

High:
- Recommender: width-only feasibility now caps length via L/W ratio so a
  200ft berth doesn't surface for a 30ft beam request; total_interest_count
  filters out junction rows whose interest is in another port.
- Mooring normalization follow-up migration (0034) catches un-hyphenated
  padded forms (A01) the original 0024 WHERE missed.
- Send-out rate limit moved AFTER validation and scoped per-(port, user)
  so typos don't burn a slot and a multi-port rep can't be DoS'd by
  another tenant.
- Default-brochure path now blocks an archived row from sneaking through
  the partial unique index.
- NocoDB import --update-snapshot honoured under --dry-run so reps can
  refresh the seed JSON without committing DB writes.
- PDF export: orderBy desc(expenseDate); apply isNull(archivedAt) when
  expenseIds are passed (was bypassed); flag rate-unavailable rows with
  an amber footer instead of silently treating them as 1:1; skip the
  USD->EUR chain when source already matches target.
- expense-form-dialog: revokeObjectURL captures the URL in the closure
  instead of revoking the still-displayed one; reset upload state on
  close.
- scan/page: handleClearReceipt resets in-flight scan/upload mutations;
  Save disabled while upload pending.
- updateExpense re-asserts receipt-or-acknowledgement at the merged
  row so PATCH can't slip past the create-time refine.

Plus the in-progress receipt upload UI for the expense form dialog
(receipt picker + "I have no receipt" checkbox + warning banner) and
a noReceiptAcknowledged flag on ExpenseRow for edit-mode hydration.

Includes the canonical plan doc (referenced in CLAUDE.md), the handoff
prompt, and a deferred-findings index for follow-up issues.

1163/1163 vitest passing. Typecheck clean.

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

src/app/api/public/berths/[mooringNumber]/route.ts

@@ -16,6 +16,10 @@ import { toPublicBerth } from '@/lib/services/public-berths';
  * ("A1", "B12") - Phase 0 normalized the entire CRM dataset.
  */
 
+// Hard-coded allowlist for the public read-only feed. Adding a port here
+// is a deliberate decision (not silent enumeration via ?portSlug=), so a
+// future private tenant can't be exposed by accident.
+const PUBLIC_PORT_SLUGS = new Set(['port-nimara']);
 const DEFAULT_PUBLIC_PORT_SLUG = 'port-nimara';
 const RESPONSE_HEADERS = {
   'cache-control': 'public, s-maxage=300, stale-while-revalidate=60',
@@ -30,7 +34,14 @@ export async function GET(
 ): Promise<Response> {
   const { mooringNumber } = await ctx.params;
   const url = new URL(request.url);
-  const portSlug = url.searchParams.get('portSlug') ?? DEFAULT_PUBLIC_PORT_SLUG;
+  const requestedSlug = url.searchParams.get('portSlug') ?? DEFAULT_PUBLIC_PORT_SLUG;
+  if (!PUBLIC_PORT_SLUGS.has(requestedSlug)) {
+    return NextResponse.json(
+      { error: 'port is not part of the public berths feed', portSlug: requestedSlug },
+      { status: 404, headers: { 'cache-control': 'no-store' } },
+    );
+  }
+  const portSlug = requestedSlug;
 
   // Reject obviously malformed mooring numbers up front so cache poisoning
   // / random-URL probing returns 400 rather than 404 (saves a DB hit).