feat(pdf): let payment receipts and reports be overridden too (#731)

Only invoices and estimates could be customised. Payment receipts and all five
reports were hardcoded to app.pdf.*, so changing them meant editing files inside
the image -- and losing the edit on the next upgrade.

Those documents have no template picker and no design to choose between, so
overriding one is not a selection: it is a same-named file in
storage/app/templates/pdf/{type}/ winning over the built-in. PdfTemplateUtils::
resolveView() is that rule, and it needs no setting, no column and no UI.

resolveView asks View::exists rather than checking the storage disk. The disk and
the view namespace are registered separately and could disagree about where
custom templates live; asking the thing that will actually render removes that
possibility.

make:template covers the new types. Their names are not free, since an override
replaces one specific document, so it validates against the real list -- 'payment'
for payments, and the five report names -- and reports what is available when the
name is wrong. Neither type gets a preview image written, having no picker to
show one in.

The payment preview route also went through the built-in view directly rather
than the service, so ?preview ignored an override and rendered with none of the
shared data. It goes through the service now, like invoices and estimates.

Claude-Session: https://claude.ai/code/session_01QmECndmNZwzN65Zz9P87dF

app/Http/Controllers/Company/Report/ExpensesReportController.php

@@ -8,6 +8,7 @@ use App\Models\Company;
 use App\Models\CompanySetting;
 use App\Models\Currency;
 use App\Models\Expense;
+use App\Support\Pdf\PdfTemplateUtils;
 use Carbon\Carbon;
 use Illuminate\Contracts\View\View;
 use Illuminate\Http\Request;
@@ -91,10 +92,15 @@ class ExpensesReportController extends Controller
             'to_date' => $to_date,
             'currency' => $currency,
         ]);
-        $pdf = Pdf::loadView('app.pdf.reports.expenses');
+        // Renders a same-named file from storage/app/templates/pdf/reports/
+        // when one exists, so a report can be overridden without a
+        // template picker it has no concept of.
+        $templatePath = PdfTemplateUtils::resolveView('reports', 'expenses');
+
+        $pdf = Pdf::loadView($templatePath);
 
         if ($request->has('preview')) {
-            return view('app.pdf.reports.expenses');
+            return view($templatePath);
         }
 
         if ($request->has('download')) {