fix:거래처코드 검색을 고유번호(id) 기반으로 변경

- Client::searchByCodeOrName → searchByIdOrName으로 변경
- 검색 기준: id(숫자일 때 정확 매칭) + name(LIKE 검색)
- 반환값: client_code 대신 id를 code로 반환

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Http/Controllers/Barobill/EaccountController.php

@@ -951,12 +951,12 @@ public function searchClients(Request $request): JsonResponse
                 ]);
             }
 
-            $clients = Client::searchByCodeOrName($tenantId, $keyword);
+            $clients = Client::searchByIdOrName($tenantId, $keyword);
 
             return response()->json([
                 'success' => true,
                 'data' => $clients->map(fn($c) => [
-                    'code' => $c->client_code,
+                    'code' => (string) $c->id,
                     'name' => $c->name,
                 ])
             ]);

app/Models/Barobill/Client.php

@@ -13,18 +13,20 @@ class Client extends Model
     protected $table = 'clients';
 
     /**
-     * 거래처코드 또는 거래처명으로 검색
+     * 고유번호(id) 또는 거래처명으로 검색
      */
-    public static function searchByCodeOrName(int $tenantId, string $keyword, int $limit = 20)
+    public static function searchByIdOrName(int $tenantId, string $keyword, int $limit = 20)
     {
         return self::where('tenant_id', $tenantId)
             ->where('is_active', true)
             ->where(function ($query) use ($keyword) {
-                $query->where('client_code', 'like', "%{$keyword}%")
-                      ->orWhere('name', 'like', "%{$keyword}%");
+                if (is_numeric($keyword)) {
+                    $query->where('id', $keyword);
+                }
+                $query->orWhere('name', 'like', "%{$keyword}%");
             })
-            ->select('client_code', 'name')
-            ->orderBy('client_code')
+            ->select('id', 'name')
+            ->orderBy('id')
             ->limit($limit)
             ->get();
     }