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/lib/services/interest-berths.service.ts

@@ -19,8 +19,9 @@
 import { and, desc, eq, inArray } from 'drizzle-orm';
 
 import { db } from '@/lib/db';
-import { interestBerths, type InterestBerth } from '@/lib/db/schema/interests';
+import { interestBerths, interests, type InterestBerth } from '@/lib/db/schema/interests';
 import { berths } from '@/lib/db/schema/berths';
+import { ValidationError } from '@/lib/errors';
 
 type DbOrTx = typeof db | Parameters<Parameters<typeof db.transaction>[0]>[0];
 
@@ -197,6 +198,26 @@ export async function upsertInterestBerthTx(
   berthId: string,
   opts: AddOrUpdateOpts = {},
 ): Promise<InterestBerth> {
+  // Cross-port guard. The junction is silently multi-port-shaped (it has
+  // no port_id of its own — it inherits via the FKs) so a caller wiring
+  // an interest from one port to a berth from another would corrupt the
+  // recommender + public-berth aggregates with phantom rows. We assert
+  // both rows live in the same port BEFORE inserting; if either side is
+  // missing, the FK constraint will surface that on insert.
+  const sides = await tx
+    .select({
+      interestPortId: interests.portId,
+      berthPortId: berths.portId,
+    })
+    .from(interests)
+    .innerJoin(berths, eq(berths.id, berthId))
+    .where(eq(interests.id, interestId))
+    .limit(1);
+  const side = sides[0];
+  if (side && side.interestPortId !== side.berthPortId) {
+    throw new ValidationError('Cannot link an interest and a berth from different ports.');
+  }
+
   if (opts.isPrimary === true) {
     await tx
       .update(interestBerths)