feat(search): index yachts and companies alongside clients

Extend the global search service to include yacht and company results
using ILIKE matching on name, hull number, registration, legal name,
and tax ID. Results are tenant-scoped and exclude archived rows.

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

src/hooks/use-search.ts

@@ -16,6 +16,18 @@ interface SearchResults {
     pipelineStage: string;
   }>;
   berths: Array<{ id: string; mooringNumber: string; area: string | null; status: string }>;
+  yachts: Array<{
+    id: string;
+    name: string;
+    hullNumber: string | null;
+    registration: string | null;
+  }>;
+  companies: Array<{
+    id: string;
+    name: string;
+    legalName: string | null;
+    taxId: string | null;
+  }>;
 }
 
 // ─── Hook ─────────────────────────────────────────────────────────────────────