feat(uat-p4): inheritance polish - yacht dims, occupancy chip, map-flip flag

Phase 4 of the active UAT sweep wraps the inheritance/polish bucket.

- BerthOccupancyChip: new shared component that surfaces the competing
  active interest on a non-available berth as a colour-coded chip with
  a stage badge. Adopted in LinkedBerthRowItem, BerthRecommenderPanel
  recommendation card, and InterestBerthStatusBanner; the banner aligns
  query keys with the chip so React Query dedupes the network call.
- OverviewTab inheritance: getInterestById now ships a yachtDimensions
  block when the interest is linked to a yacht with dimensions. The
  Berth Requirements rows render a "↩ <value> from yacht" pill when
  the desired field is blank; clicking the pill copies the value into
  the interest. After a manual edit, a toast offers to write the new
  value back to the yacht record so the canonical truth stays in sync.
- Map-flip inheritance: ExternalEoiUploadDialog and UploadForSigningDialog
  now expose a single "Mark berth(s) as Under Offer on the public map"
  checkbox that defaults ON when any in-bundle berth already has
  is_specific_interest=true. On submit, PATCHes the in-bundle berths
  that don't already match; sister surface to the EOI generate
  dialog's per-berth picker.

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

src/lib/services/interests.service.ts

@@ -665,6 +665,45 @@ export async function getInterestById(id: string, portId: string) {
     : (berthResoldRaw.rows ?? []);
   const dateBerthSoldToOther = berthResoldRows[0]?.at ?? null;
 
+  // Yacht dimensions for inheritance display in OverviewTab. When the
+  // interest has a linked yacht we ship the yacht's length/width/draft
+  // alongside the interest record so the Berth Requirements section can
+  // render a "from yacht" pill in place of an empty value. This is a
+  // display-only inheritance - the actual recommender source switch is
+  // still governed by `interests.useYachtDimensions`.
+  let yachtDimensions: {
+    lengthFt: string | null;
+    widthFt: string | null;
+    draftFt: string | null;
+    lengthM: string | null;
+    widthM: string | null;
+    draftM: string | null;
+  } | null = null;
+  if (interest.yachtId) {
+    const [yachtRow] = await db
+      .select({
+        lengthFt: yachts.lengthFt,
+        widthFt: yachts.widthFt,
+        draftFt: yachts.draftFt,
+        lengthM: yachts.lengthM,
+        widthM: yachts.widthM,
+        draftM: yachts.draftM,
+      })
+      .from(yachts)
+      .where(eq(yachts.id, interest.yachtId))
+      .limit(1);
+    if (yachtRow) {
+      const anyDim =
+        yachtRow.lengthFt ||
+        yachtRow.widthFt ||
+        yachtRow.draftFt ||
+        yachtRow.lengthM ||
+        yachtRow.widthM ||
+        yachtRow.draftM;
+      if (anyDim) yachtDimensions = yachtRow;
+    }
+  }
+
   // Resolve the assignee's display name for the header chip - falling back
   // to the raw ID is fine if the user record is missing (deleted/disabled).
   let assignedToName: string | null = null;
@@ -706,6 +745,7 @@ export async function getInterestById(id: string, portId: string) {
     dateDocumentDeclined,
     dateReservationCancelled,
     dateBerthSoldToOther,
+    yachtDimensions,
   };
 }