feat(accounting): document colleague trades on configured accounts

Post Montzar-covered buy/sell to Zarin/Tahesab/Pargar using montzar_account_* settings, and harden public storage URL/MIME handling for uploads.

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

app/Http/Controllers/Admin/TahesabController.php

@@ -453,10 +453,25 @@ class TahesabController extends Controller
         }
 
         $customer = Customer::where('id', $data['customer_id'])->first();
+        $accountOverride = trim((string) ($data['accounting_account_code'] ?? ''));
+        $isColleagueLeg = ! empty($data['colleague_leg']) && $accountOverride !== '';
 
-        if ($customer && ($customer->moshtari_code === null)) {
-            $this->createCustomerInTahesab($customer->id);
-            $customer = Customer::where('id', $data['customer_id'])->first();
+        if (! $isColleagueLeg) {
+            if ($customer && ($customer->moshtari_code === null)) {
+                $this->createCustomerInTahesab($customer->id);
+                $customer = Customer::where('id', $data['customer_id'])->first();
+            }
+        }
+
+        if (! $customer) {
+            return false;
+        }
+
+        $hesabCode = $isColleagueLeg
+            ? (int) $accountOverride
+            : (int) ($customer->moshtari_code ?? 0);
+        if ($hesabCode <= 0) {
+            return false;
         }
 
         $kind = $mapper->resolveKind($product);
@@ -490,7 +505,14 @@ class TahesabController extends Controller
 
         $action = $isBuy ? 'خرید' : 'فروش';
         $kindFa = $mapper->kindLabel($kind);
-        $sharh = trim($title !== '' ? "{$action} {$title}" : "{$action} {$kindFa}");
+        $sharh = trim((string) ($data['sharh_override'] ?? ''));
+        if ($sharh === '') {
+            $sharh = trim($title !== '' ? "{$action} {$title}" : "{$action} {$kindFa}");
+        }
+
+        $orderId = is_object($data['order'] ?? null)
+            ? ($data['order']->id ?? null)
+            : ($data['order']['id'] ?? null);
 
         $data['handler'] = 'storeTrade';
         if ($existing && empty($existing->data)) {
@@ -500,21 +522,21 @@ class TahesabController extends Controller
             'customer_id' => $customer->id,
             'desc' => $sharh,
             'amount' => $mapper->isCountDoc($product) ? $count : $vazn,
-            'order_id' => $data['order']['id'] ?? null,
+            'order_id' => $orderId,
             'date' => $data['pay_at'] ?? Carbon::now(),
             'type' => $mapper->syncTypeLabel($product),
             'created_at' => Carbon::now(),
             'data' => json_encode($data, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT),
         ]);
 
-        if ($mapper->isCountDoc($product) && $title === '') {
+        if ($mapper->isCountDoc($product) && $title === '' && ! $isColleagueLeg) {
             $this->sync()->markFailed($tahesab, null, 'نام محصول برای سند تعدادی ته‌حساب خالی است');
             return false;
         }
 
         $body = $this->buildBuySaleBody(
             $kind,
-            (int) $customer->moshtari_code,
+            $hesabCode,
             (int) $year,
             (int) $month,
             (int) $day,