add notes/remark and refactor round-trip

app-modules/booking/database/factories/BookingFactory.php

@@ -29,6 +29,8 @@ class BookingFactory extends Factory
             'user_id' => null,
             'openid' => null,
             'ev_route_id' => EvRoute::factory(),
+            'linked_booking_id' => null,
+            'is_return_leg' => false,
             'departure_time_slot_id' => DepartureTimeSlot::factory(),
             'travel_date' => now()->addDay()->toDateString(),
             'passenger_name' => $this->faker->name(),
@@ -41,8 +43,6 @@ class BookingFactory extends Factory
             'dropoff_lng' => null,
             'price' => $this->faker->randomFloat(2, 5000, 50000),
             'status' => BookingStatus::PendingPayment,
-            'is_round_trip' => false,
-            'return_travel_date' => null,
             'created_by_channel' => BookingChannel::MiniApp,
             'driver_name' => null,
             'driver_phone' => null,

app-modules/booking/database/migrations/2026_08_20_000000_add_notes_and_remark_to_bookings_table.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * 'notes' — customer-supplied, submitted via the booking create API
+     * endpoint (StoreBookingRequest). 'remark' — staff-only, set from the
+     * admin panel (SetRemarkTableAction); never exposed on the customer
+     * BookingResource. Both nullable, free text.
+     */
+    public function up(): void
+    {
+        Schema::table('bookings', function (Blueprint $table) {
+            $table->text('notes')->nullable();
+            $table->text('remark')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('bookings', function (Blueprint $table) {
+            $table->dropColumn(['notes', 'remark']);
+        });
+    }
+};

app-modules/booking/database/migrations/2026_08_21_000000_redesign_round_trip_booking_linking.php

@@ -0,0 +1,40 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Round trip is redesigned as two linked one-way Booking rows (outbound
+     * + return) rather than a flag + a lone return date on a single row —
+     * the return leg needs its own route/time-slot/price/driver-vehicle
+     * assignment, since it may run with a different vehicle than the
+     * outbound leg (domain.md §2b). `is_round_trip` becomes a computed
+     * accessor on the model (`linked_booking_id !== null`), so the column
+     * is dropped rather than kept redundant.
+     */
+    public function up(): void
+    {
+        Schema::table('bookings', function (Blueprint $table) {
+            $table->dropColumn(['is_round_trip', 'return_travel_date']);
+            $table->foreignId('linked_booking_id')->nullable()->after('ev_route_id')
+                ->constrained('bookings')->nullOnDelete();
+            $table->boolean('is_return_leg')->default(false)->after('linked_booking_id');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('bookings', function (Blueprint $table) {
+            $table->dropConstrainedForeignId('linked_booking_id');
+            $table->dropColumn('is_return_leg');
+            $table->boolean('is_round_trip')->default(false);
+            $table->date('return_travel_date')->nullable();
+        });
+    }
+};