feat(uat-b1): ship Wave A-E of Bucket 1 audit findings

Wave A (Interest+EOI form quick wins):
- Auto-select yacht after inline-create from interest form
- EOI generate dialog: "View EOI" action toast
- Interest form berth picker: formatBerthRange compact label
- Remove "Generate EOI" button from Documents tab (clean removal)
- Interest auto-assign: only sales_agent/sales_manager auto-claim
  ownership on create (explicit role check via user_port_roles join)
- LinkedBerthRowItem dims: drop "D" suffix + "L × W" format
- ExternalEoiUploadDialog: prefillSignatories prop threaded from
  active EOI signers
- EOI signature progress on Overview milestone card footer

Wave B (a11y + i18n sweeps):
- aria-live on supplemental-info error state
- text-[10px] -> text-xs in client-pipeline-summary
- Currency formatter: locale default removed (Intl uses runtime)
- en-US/en-GB hardcoded toLocaleString swept across 13 components

Wave C (Primary berth always in EOI bundle):
- Service guard strengthened on update path
- Migration 0083 backfills historical primary rows

Wave D (Onboarding super_admin discoverability):
- /api/v1/admin/onboarding/status endpoint + shared service
- Topbar OnboardingBanner (super_admin, session-dismissible)
- OnboardingTile dashboard widget (rail group, self-hides at 100%)
- Celebration toast + invalidate of shared status on last tick

Wave E (Branded post-completion email idempotency):
- Verified handleDocumentCompleted already owns the email fan-out
- Added regression test for the polling path + idempotency

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

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

@@ -293,12 +293,23 @@ export async function upsertInterestBerthTx(
   if (opts.isInEoiBundle !== undefined) setForUpdate.isInEoiBundle = opts.isInEoiBundle;
   // Invariant: primary berth is ALWAYS in the EOI bundle. The primary IS
   // the canonical "berth for this deal" - excluding it from the signed
-  // envelope is semantically nonsense. If the caller is setting the row
-  // to primary OR opting to take out of the EOI bundle, force the bundle
-  // flag back on whenever the row is also (about to be) primary.
+  // envelope is semantically nonsense.
+  //   • If the caller is setting the row to primary + opting out of bundle,
+  //     force the bundle flag back on.
+  //   • If the existing row is already primary and the caller is toggling
+  //     the bundle off without changing primary, also force it back on.
   const willBePrimary = opts.isPrimary === true;
   if (willBePrimary && opts.isInEoiBundle === false) {
     setForUpdate.isInEoiBundle = true;
+  } else if (opts.isInEoiBundle === false && opts.isPrimary !== false) {
+    const existing = await tx
+      .select({ isPrimary: interestBerths.isPrimary })
+      .from(interestBerths)
+      .where(and(eq(interestBerths.interestId, interestId), eq(interestBerths.berthId, berthId)))
+      .limit(1);
+    if (existing[0]?.isPrimary) {
+      setForUpdate.isInEoiBundle = true;
+    }
   }
   if (opts.addedBy !== undefined) setForUpdate.addedBy = opts.addedBy;
   if (opts.notes !== undefined) setForUpdate.notes = opts.notes;