Add service-point routing so call-next cannot steal assigned tickets.

Counters gain destination/staff metadata; tickets can be pre-assigned to a
service point with assigned_only queues for healthcare while shared_pool
preserves generic bank/government behavior. Display and announcements expose
ticket, staff, and destination clearly for Care and public boards.

Co-authored-by: Cursor <cursoragent@cursor.com>

database/migrations/2026_07_17_180000_add_service_point_routing_fields.php

@@ -0,0 +1,55 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+/**
+ * Service-point routing for departments that need explicit assignment
+ * (e.g. doctor rooms) while preserving shared-pool call-next for generic queues.
+ *
+ * Counter ≈ service point (room / desk / window). Destination + staff are
+ * display/assignment metadata; tickets may be pre-assigned via assigned_counter_id.
+ */
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('queue_counters', function (Blueprint $table) {
+            $table->string('destination')->nullable()->after('code');
+            $table->string('staff_ref')->nullable()->index()->after('destination');
+            $table->string('staff_display_name')->nullable()->after('staff_ref');
+        });
+
+        Schema::table('queue_tickets', function (Blueprint $table) {
+            $table->foreignId('assigned_counter_id')
+                ->nullable()
+                ->after('counter_id')
+                ->constrained('queue_counters')
+                ->nullOnDelete();
+            $table->index(['service_queue_id', 'status', 'assigned_counter_id'], 'queue_tickets_waiting_assignment_idx');
+        });
+
+        Schema::table('queue_departments', function (Blueprint $table) {
+            $table->string('external_key')->nullable()->after('type');
+            $table->index(['owner_ref', 'external_key']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('queue_tickets', function (Blueprint $table) {
+            $table->dropIndex('queue_tickets_waiting_assignment_idx');
+            $table->dropConstrainedForeignId('assigned_counter_id');
+        });
+
+        Schema::table('queue_counters', function (Blueprint $table) {
+            $table->dropColumn(['destination', 'staff_ref', 'staff_display_name']);
+        });
+
+        Schema::table('queue_departments', function (Blueprint $table) {
+            $table->dropIndex(['owner_ref', 'external_key']);
+            $table->dropColumn('external_key');
+        });
+    }
+};