Consolidate Company/Settings: 7 controllers -> 5

Merge CompanyCurrencyCheckTransactionsController into
CompanySettingsController as checkTransactions() method.

Merge UserSettingsController into UserProfileController as
showSettings() and updateSettings() methods — both operate on
the authenticated user (/me routes).

app/Http/Controllers/Company/Settings/CompanySettingsController.php

@@ -8,6 +8,7 @@ use App\Http\Requests\UpdateSettingsRequest;
 use App\Models\Company;
 use App\Models\CompanySetting;
 use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
 use Illuminate\Support\Arr;
 
 class CompanySettingsController extends Controller
@@ -43,4 +44,15 @@ class CompanySettingsController extends Controller
             'success' => true,
         ]);
     }
+
+    public function checkTransactions(Request $request): JsonResponse
+    {
+        $company = Company::find($request->header('company'));
+
+        $this->authorize('manage company', $company);
+
+        return response()->json([
+            'has_transactions' => $company->hasTransactions(),
+        ]);
+    }
 }