refactor:문서템플릿 분류 동적 조회 및 회사정보 제거

- 분류: CommonCode → DocumentTemplate에서 group by 조회
- 분류 입력: select → input + datalist (자유입력 + 자동완성)
- 회사정보 입력 필드 제거 (tenant에서 자동 조회)
- 미리보기: tenant 회사명 자동 표시

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

app/Http/Controllers/DocumentTemplateController.php

@@ -3,7 +3,7 @@
 namespace App\Http\Controllers;
 
 use App\Models\DocumentTemplate;
-use App\Models\Products\CommonCode;
+use App\Models\Tenants\Tenant;
 use Illuminate\Http\Request;
 use Illuminate\View\View;
 
@@ -15,7 +15,7 @@ class DocumentTemplateController extends Controller
     public function index(Request $request): View
     {
         return view('document-templates.index', [
-            'documentTypes' => $this->getDocumentTypes(),
+            'categories' => $this->getCategories(),
         ]);
     }
 
@@ -28,7 +28,8 @@ public function create(): View
             'template' => null,
             'templateData' => null,
             'isCreate' => true,
-            'documentTypes' => $this->getDocumentTypes(),
+            'categories' => $this->getCategories(),
+            'tenant' => $this->getCurrentTenant(),
         ]);
     }
 
@@ -51,28 +52,40 @@ public function edit(int $id): View
             'template' => $template,
             'templateData' => $templateData,
             'isCreate' => false,
-            'documentTypes' => $this->getDocumentTypes(),
+            'categories' => $this->getCategories(),
+            'tenant' => $this->getCurrentTenant(),
         ]);
     }
 
     /**
-     * 문서분류 목록 조회 (글로벌 + 테넌트)
+     * 현재 선택된 테넌트 조회
      */
-    private function getDocumentTypes(): array
+    private function getCurrentTenant(): ?Tenant
     {
         $tenantId = session('selected_tenant_id');
 
-        return CommonCode::query()
+        return $tenantId ? Tenant::find($tenantId) : null;
+    }
+
+    /**
+     * 문서분류 목록 조회 (글로벌 + 테넌트, 기존 데이터에서 group by)
+     */
+    private function getCategories(): array
+    {
+        $tenantId = session('selected_tenant_id');
+
+        return DocumentTemplate::query()
             ->where(function ($query) use ($tenantId) {
                 $query->whereNull('tenant_id');
                 if ($tenantId) {
                     $query->orWhere('tenant_id', $tenantId);
                 }
             })
-            ->where('code_group', 'document_type')
-            ->where('is_active', true)
-            ->orderBy('sort_order')
-            ->pluck('name', 'code')
+            ->whereNotNull('category')
+            ->where('category', '!=', '')
+            ->distinct()
+            ->orderBy('category')
+            ->pluck('category')
             ->toArray();
     }
 
@@ -85,9 +98,6 @@ private function prepareTemplateData(DocumentTemplate $template): array
             'name' => $template->name,
             'category' => $template->category,
             'title' => $template->title,
-            'company_name' => $template->company_name,
-            'company_address' => $template->company_address,
-            'company_contact' => $template->company_contact,
             'footer_remark_label' => $template->footer_remark_label,
             'footer_judgement_label' => $template->footer_judgement_label,
             'footer_judgement_options' => $template->footer_judgement_options,