feat: [org-chart] 조직도 관리 API 이관 (8개 엔드포인트)

- OrgChartController + OrgChartService 신규 생성
- FormRequest 5개 (Assign/Unassign/ReorderEmployees/ReorderDepartments/ToggleHide)
- Department 모델 options cast 추가
- Swagger 문서 (OrgChartApi.php) 생성
- hr.php 라우트 그룹 추가 (/v1/org-chart)

app/Http/Controllers/Api/V1/OrgChartController.php

@@ -0,0 +1,82 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1;
+
+use App\Helpers\ApiResponse;
+use App\Http\Controllers\Controller;
+use App\Http\Requests\OrgChart\AssignRequest;
+use App\Http\Requests\OrgChart\ReorderDepartmentsRequest;
+use App\Http\Requests\OrgChart\ReorderEmployeesRequest;
+use App\Http\Requests\OrgChart\ToggleHideRequest;
+use App\Http\Requests\OrgChart\UnassignRequest;
+use App\Services\OrgChartService;
+use Illuminate\Http\Request;
+
+class OrgChartController extends Controller
+{
+    public function __construct(private OrgChartService $service) {}
+
+    // GET /v1/org-chart
+    public function index(Request $request)
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->getOrgChart($request->all());
+        }, __('message.fetched'));
+    }
+
+    // GET /v1/org-chart/stats
+    public function stats()
+    {
+        return ApiResponse::handle(function () {
+            return $this->service->getStats();
+        }, __('message.fetched'));
+    }
+
+    // GET /v1/org-chart/unassigned
+    public function unassigned(Request $request)
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->getUnassigned($request->all());
+        }, __('message.fetched'));
+    }
+
+    // POST /v1/org-chart/assign
+    public function assign(AssignRequest $request)
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->assign($request->validated());
+        }, __('message.updated'));
+    }
+
+    // POST /v1/org-chart/unassign
+    public function unassign(UnassignRequest $request)
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->unassign($request->validated());
+        }, __('message.updated'));
+    }
+
+    // PUT /v1/org-chart/reorder-employees
+    public function reorderEmployees(ReorderEmployeesRequest $request)
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->reorderEmployees($request->validated());
+        }, __('message.reordered'));
+    }
+
+    // PUT /v1/org-chart/reorder-departments
+    public function reorderDepartments(ReorderDepartmentsRequest $request)
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->reorderDepartments($request->validated());
+        }, __('message.reordered'));
+    }
+
+    // PATCH /v1/org-chart/departments/{id}/toggle-hide
+    public function toggleHide(int $id, ToggleHideRequest $request)
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->toggleHide($id, $request->validated());
+        }, __('message.updated'));
+    }
+}