Add Ladill POS v1 — register, Pay checkout, and commerce links.

Staff-facing counter register at pos.ladill.com with catalog cart, cash and
MoMo/card checkout via Ladill Pay, CRM timeline/import, invoice prefill, and
Merchant catalog import.

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

app/Http/Controllers/Api/Mini/PushTokenController.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Http\Controllers\Api\Mini;
+
+use App\Http\Controllers\Controller;
+use App\Models\UserPushToken;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class PushTokenController extends Controller
+{
+    public function store(Request $request): JsonResponse
+    {
+        $data = $request->validate([
+            'token' => ['required', 'string', 'max:512'],
+            'platform' => ['nullable', 'string', 'max:32'],
+            'device_name' => ['nullable', 'string', 'max:120'],
+        ]);
+
+        $user = $request->user();
+        $now = now();
+
+        UserPushToken::updateOrCreate(
+            ['token' => $data['token']],
+            [
+                'user_id' => $user->id,
+                'platform' => $data['platform'] ?? 'android',
+                'device_name' => $data['device_name'] ?? $user->currentAccessToken()?->name,
+                'last_seen_at' => $now,
+            ],
+        );
+
+        $user->update(['last_app_active_at' => $now]);
+
+        return response()->json(['data' => ['registered' => true]]);
+    }
+
+    public function destroy(Request $request): JsonResponse
+    {
+        $data = $request->validate([
+            'token' => ['required', 'string', 'max:512'],
+        ]);
+
+        $request->user()
+            ->pushTokens()
+            ->where('token', $data['token'])
+            ->delete();
+
+        return response()->json(['data' => ['removed' => true]]);
+    }
+}