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/SupportController.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace App\Http\Controllers\Api\Mini;
+
+use App\Http\Controllers\Api\Concerns\CallsIdentityApi;
+use App\Http\Controllers\Controller;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+/**
+ * Support tickets — proxies to the central support system (auth.ladill.com),
+ * so tickets land in the same admin support queue as every other Ladill app.
+ */
+class SupportController extends Controller
+{
+    use CallsIdentityApi;
+
+    public function tickets(): JsonResponse
+    {
+        $response = $this->identitySend('GET', '/api/identity/support/tickets?user='.urlencode((string) ladill_account()->public_id), []);
+
+        return response()->json(['data' => $response->json('data', [])]);
+    }
+
+    public function ticket(int $ticket): JsonResponse
+    {
+        $response = $this->identitySend(
+            'GET',
+            '/api/identity/support/tickets/'.$ticket.'?user='.urlencode((string) ladill_account()->public_id),
+            [],
+        );
+
+        if ($response->status() === 404) {
+            return response()->json(['message' => 'Ticket not found.'], 404);
+        }
+
+        return response()->json(['data' => $response->json('data')]);
+    }
+
+    public function store(Request $request): JsonResponse
+    {
+        $data = $request->validate([
+            'subject' => ['required', 'string', 'max:255'],
+            'message' => ['required', 'string', 'max:5000'],
+            'priority' => ['sometimes', 'in:low,normal,high'],
+        ]);
+
+        $response = $this->identitySend('POST', '/api/identity/support/tickets', array_merge(
+            ['user' => ladill_account()->public_id],
+            $data,
+        ));
+        $this->rethrowValidation($response, 'subject');
+
+        return response()->json(['data' => $response->json('data')], 201);
+    }
+}