diff --git a/CURRENT_WORKS.md b/CURRENT_WORKS.md
index d5bc318..d35f84d 100644
--- a/CURRENT_WORKS.md
+++ b/CURRENT_WORKS.md
@@ -1,3 +1,63 @@
+## 2026-01-30 (목) - 5130↔SAM 견적 교차 검증 완료 + 마이그레이션 검증
+
+### 작업 목표
+- SAM 견적 계산이 5130 레거시 시스템과 100% 일치하는지 교차 검증
+- FormulaEvaluatorService 슬랫/스틸 지원 완성
+- MigrateBDModelsPrices 커맨드 동작 검증
+
+### 수정된 파일
+| 파일명 | 설명 |
+|--------|------|
+| `app/Services/Quote/FormulaEvaluatorService.php` | 제품타입별 면적/중량 공식 분기, 모터/브라켓 입력값 오버라이드, 디버그 포뮬러 동적 표시 |
+| `app/Services/Quote/Handlers/KyungdongFormulaHandler.php` | 제품타입별 면적/중량 공식, normalizeGuideType() 추가, guide_rail_spec 파라미터 별칭 |
+
+### 핵심 수정 내용
+
+#### 1. 제품타입별 면적/중량 공식 (FormulaEvaluatorService + Handler)
+- **Screen**: area = (W1 × (H1+550)) / 1M, weight = area×2 + (W0/1000)×14.17
+- **Slat**: area = (W0 × (H0+50)) / 1M, weight = area×25
+- **Steel**: area = (W1 × (H1+550)) / 1M, weight = area×25
+
+#### 2. 모터/브라켓 입력값 오버라이드
+- 기존: 항상 자동 계산
+- 수정: `MOTOR_CAPACITY`, `BRACKET_SIZE` 입력값이 있으면 우선 사용
+
+#### 3. 가이드타입 정규화
+- `normalizeGuideType()` 메서드 추가 (벽면↔벽면형, 측면↔측면형, 혼합↔혼합형)
+- `guide_rail_spec` 파라미터 별칭 지원
+
+### 검증 결과
+
+#### 전 모델 교차 검증 (Task #6) ✅
+```
+16/16 ALL PASS
+- 10개 스크린 조합 (KSS01, KSS02, KSE01, KWE01, KTE01, KQTS01, KDSS01 × SUS/EGI)
+- 6개 슬랫 조합 (KSS02, KSE01, KTE01 × SUS × 2사이즈)
+- 조건: 6800×2700, QTY=1, 300K 모터, 5인치 브라켓
+```
+
+#### 가이드타입 교차 검증 (Task #7) ✅
+```
+21/21 ALL PASS
+- 벽면/측면/혼합 × 4모델(KSS02, KSE01, KTE01, KDSS01) × screen
+- 벽면/측면/혼합 × 3모델(KSS02, KSE01, KTE01) × slat
+- 혼합형: 5130은 col6에 "혼합 120*70/120*120" 두 규격 필요
+```
+
+#### MigrateBDModelsPrices 커맨드 검증 (Task #4, #5) ✅
+```
+커맨드 정상 동작 확인
+- BD-* (절곡품): 58건 마이그레이션 완료
+- EST-* (모터/제어기/원자재 등): 71건 마이그레이션 완료
+- chandj 원본 가격 일치: 7/7 검증 통과
+- --dry-run, --fresh 옵션 정상 동작
+```
+
+### Git 커밋
+- `f4a902f` - fix: FormulaEvaluatorService 슬랫/스틸 제품타입별 면적/중량/모터/가이드 수정
+
+---
+
 ## 2026-01-29 (수) - 경동기업 견적 로직 Phase 4 완료
 
 ### 작업 목표
diff --git a/app/Console/Commands/BackupCheckCommand.php b/app/Console/Commands/BackupCheckCommand.php
new file mode 100644
index 0000000..221928b
--- /dev/null
+++ b/app/Console/Commands/BackupCheckCommand.php
@@ -0,0 +1,115 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Services\SlackNotificationService;
+use App\Services\Stats\StatMonitorService;
+use Illuminate\Console\Command;
+use Illuminate\Support\Facades\Log;
+
+class BackupCheckCommand extends Command
+{
+    protected $signature = 'db:backup-check
+                            {--path= : 백업 경로 오버라이드}';
+
+    protected $description = 'DB 백업 상태를 확인하고 이상 시 알림을 생성합니다';
+
+    public function handle(StatMonitorService $monitorService): int
+    {
+        $this->info('DB 백업 상태 확인 시작...');
+
+        $statusFile = $this->option('path')
+            ? rtrim($this->option('path'), '/') . '/.backup_status'
+            : env('BACKUP_STATUS_FILE', '/data/backup/mysql/.backup_status');
+
+        $errors = [];
+
+        // 1. 상태 파일 존재 여부
+        if (! file_exists($statusFile)) {
+            $errors[] = '백업 상태 파일 없음: ' . $statusFile;
+            $this->reportErrors($monitorService, $errors);
+
+            return self::FAILURE;
+        }
+
+        $status = json_decode(file_get_contents($statusFile), true);
+
+        if (json_last_error() !== JSON_ERROR_NONE) {
+            $errors[] = '상태 파일 JSON 파싱 실패: ' . json_last_error_msg();
+            $this->reportErrors($monitorService, $errors);
+
+            return self::FAILURE;
+        }
+
+        // 2. last_run이 25시간 이내인지
+        $lastRun = strtotime($status['last_run'] ?? '');
+        if (! $lastRun || (time() - $lastRun) > 25 * 3600) {
+            $lastRunStr = $status['last_run'] ?? 'unknown';
+            $errors[] = "마지막 백업이 25시간 초과: {$lastRunStr}";
+        }
+
+        // 3. status가 success인지
+        if (($status['status'] ?? '') !== 'success') {
+            $errors[] = '백업 상태 실패: ' . ($status['status'] ?? 'unknown');
+        }
+
+        // 4. 각 DB 백업 파일 크기 검증
+        $minSizes = [
+            'sam' => (int) env('BACKUP_MIN_SIZE_SAM', 1048576),
+            'sam_stat' => (int) env('BACKUP_MIN_SIZE_STAT', 102400),
+        ];
+
+        $databases = $status['databases'] ?? [];
+        foreach ($minSizes as $dbName => $minSize) {
+            if (! isset($databases[$dbName])) {
+                $errors[] = "{$dbName} DB 백업 정보 없음";
+
+                continue;
+            }
+
+            $sizeBytes = $databases[$dbName]['size_bytes'] ?? 0;
+            if ($sizeBytes < $minSize) {
+                $errors[] = "{$dbName} 백업 파일 크기 부족: {$sizeBytes} bytes (최소 {$minSize})";
+            }
+        }
+
+        // 결과 처리
+        if (! empty($errors)) {
+            $this->reportErrors($monitorService, $errors);
+
+            return self::FAILURE;
+        }
+
+        $this->info('✅ DB 백업 상태 정상');
+        Log::info('db:backup-check 정상', [
+            'last_run' => $status['last_run'],
+            'databases' => array_keys($databases),
+        ]);
+
+        return self::SUCCESS;
+    }
+
+    private function reportErrors(StatMonitorService $monitorService, array $errors): void
+    {
+        $errorMessage = implode("\n", $errors);
+
+        $this->error('❌ DB 백업 이상 감지:');
+        foreach ($errors as $error) {
+            $this->error("  - {$error}");
+        }
+
+        // stat_alerts에 기록
+        $monitorService->recordBackupFailure(
+            '[backup] DB 백업 이상 감지',
+            $errorMessage
+        );
+
+        // Slack 알림 전송
+        app(SlackNotificationService::class)->sendBackupAlert(
+            'DB 백업 이상 감지',
+            $errorMessage
+        );
+
+        Log::error('db:backup-check 실패', ['errors' => $errors]);
+    }
+}
\ No newline at end of file
diff --git a/app/Http/Controllers/Api/V1/AppVersionController.php b/app/Http/Controllers/Api/V1/AppVersionController.php
new file mode 100644
index 0000000..1fe030f
--- /dev/null
+++ b/app/Http/Controllers/Api/V1/AppVersionController.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1;
+
+use App\Http\Controllers\Controller;
+use App\Services\AppVersionService;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\StreamedResponse;
+
+class AppVersionController extends Controller
+{
+    /**
+     * 최신 버전 확인
+     * GET /api/v1/app/version?platform=android&current_version_code=1
+     */
+    public function latestVersion(Request $request): JsonResponse
+    {
+        $platform = $request->input('platform', 'android');
+        $currentVersionCode = (int) $request->input('current_version_code', 0);
+
+        $result = AppVersionService::getLatestVersion($platform, $currentVersionCode);
+
+        return response()->json([
+            'success' => true,
+            'data' => $result,
+        ]);
+    }
+
+    /**
+     * APK 다운로드
+     * GET /api/v1/app/download/{id}
+     */
+    public function download(int $id): StreamedResponse
+    {
+        return AppVersionService::downloadApk($id);
+    }
+}
diff --git a/app/Http/Controllers/Api/V1/CommonController.php b/app/Http/Controllers/Api/V1/CommonController.php
index 84ec27a..93fc6a4 100644
--- a/app/Http/Controllers/Api/V1/CommonController.php
+++ b/app/Http/Controllers/Api/V1/CommonController.php
@@ -3,17 +3,17 @@
 namespace App\Http\Controllers\Api\V1;
 
 use App\Helpers\ApiResponse;
+use App\Models\Products\CommonCode;
+use App\Models\Scopes\TenantScope;
 use Illuminate\Http\Request;
-use Illuminate\Support\Facades\DB;
 
 class CommonController
 {
     public static function getComeCode()
     {
         return ApiResponse::handle(function () {
-            return DB::table('common_codes')
+            return CommonCode::query()
                 ->select(['code_group', 'code', 'name', 'description', 'is_active'])
-                ->where('tenant_id', app('tenant_id'))
                 ->get();
         }, '공통코드');
     }
@@ -36,13 +36,22 @@ public function index(Request $request, string $group)
         return ApiResponse::handle(function () use ($group) {
             $tenantId = app('tenant_id');
 
-            return DB::table('common_codes')
-                ->select(['id', 'code', 'name', 'description', 'sort_order', 'attributes'])
+            // BelongsToTenant 스코프 해제 (글로벌 폴백 로직 직접 처리)
+            $base = CommonCode::withoutGlobalScope(TenantScope::class)
                 ->where('code_group', $group)
-                ->where('is_active', true)
-                ->where(function ($query) use ($tenantId) {
-                    $query->where('tenant_id', $tenantId)
-                        ->orWhereNull('tenant_id');
+                ->where('is_active', true);
+
+            // 테넌트 전용 데이터가 있으면 테넌트만, 없으면 글로벌 폴백
+            $hasTenantData = (clone $base)->where('tenant_id', $tenantId)->exists();
+
+            return (clone $base)
+                ->select(['id', 'code', 'name', 'description', 'sort_order', 'attributes'])
+                ->where(function ($query) use ($tenantId, $hasTenantData) {
+                    if ($hasTenantData) {
+                        $query->where('tenant_id', $tenantId);
+                    } else {
+                        $query->whereNull('tenant_id');
+                    }
                 })
                 ->orderBy('sort_order')
                 ->get();
diff --git a/app/Http/Controllers/Api/V1/Documents/DocumentController.php b/app/Http/Controllers/Api/V1/Documents/DocumentController.php
index 639031f..9cbc832 100644
--- a/app/Http/Controllers/Api/V1/Documents/DocumentController.php
+++ b/app/Http/Controllers/Api/V1/Documents/DocumentController.php
@@ -4,7 +4,9 @@
 
 use App\Helpers\ApiResponse;
 use App\Http\Controllers\Controller;
+use App\Http\Requests\Document\ApproveRequest;
 use App\Http\Requests\Document\IndexRequest;
+use App\Http\Requests\Document\RejectRequest;
 use App\Http\Requests\Document\StoreRequest;
 use App\Http\Requests\Document\UpdateRequest;
 use App\Services\DocumentService;
@@ -70,10 +72,50 @@ public function destroy(int $id): JsonResponse
     }
 
     // =========================================================================
-    // 결재 관련 메서드 (보류 - 기존 시스템 연동 필요)
+    // 결재 워크플로우
     // =========================================================================
-    // public function submit(int $id): JsonResponse
-    // public function approve(int $id, ApproveRequest $request): JsonResponse
-    // public function reject(int $id, RejectRequest $request): JsonResponse
-    // public function cancel(int $id): JsonResponse
+
+    /**
+     * 결재 제출 (DRAFT → PENDING)
+     * POST /v1/documents/{id}/submit
+     */
+    public function submit(int $id): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id) {
+            return $this->service->submit($id);
+        }, __('message.updated'));
+    }
+
+    /**
+     * 결재 승인
+     * POST /v1/documents/{id}/approve
+     */
+    public function approve(int $id, ApproveRequest $request): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->approve($id, $request->validated()['comment'] ?? null);
+        }, __('message.updated'));
+    }
+
+    /**
+     * 결재 반려
+     * POST /v1/documents/{id}/reject
+     */
+    public function reject(int $id, RejectRequest $request): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->reject($id, $request->validated()['comment']);
+        }, __('message.updated'));
+    }
+
+    /**
+     * 결재 취소/회수
+     * POST /v1/documents/{id}/cancel
+     */
+    public function cancel(int $id): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id) {
+            return $this->service->cancel($id);
+        }, __('message.updated'));
+    }
 }
diff --git a/app/Http/Controllers/Api/V1/Documents/DocumentTemplateController.php b/app/Http/Controllers/Api/V1/Documents/DocumentTemplateController.php
new file mode 100644
index 0000000..3173881
--- /dev/null
+++ b/app/Http/Controllers/Api/V1/Documents/DocumentTemplateController.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1\Documents;
+
+use App\Helpers\ApiResponse;
+use App\Http\Controllers\Controller;
+use App\Http\Requests\DocumentTemplate\IndexRequest;
+use App\Services\DocumentTemplateService;
+use Illuminate\Http\JsonResponse;
+
+class DocumentTemplateController extends Controller
+{
+    public function __construct(private DocumentTemplateService $service) {}
+
+    /**
+     * 양식 목록 조회
+     * GET /v1/document-templates
+     */
+    public function index(IndexRequest $request): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->list($request->validated());
+        }, __('message.fetched'));
+    }
+
+    /**
+     * 양식 상세 조회
+     * GET /v1/document-templates/{id}
+     */
+    public function show(int $id): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id) {
+            return $this->service->show($id);
+        }, __('message.fetched'));
+    }
+}
diff --git a/app/Http/Middleware/ApiKeyMiddleware.php b/app/Http/Middleware/ApiKeyMiddleware.php
index 3b4f110..5a6d769 100644
--- a/app/Http/Middleware/ApiKeyMiddleware.php
+++ b/app/Http/Middleware/ApiKeyMiddleware.php
@@ -123,6 +123,7 @@ public function handle(Request $request, Closure $next)
             'api/v1/debug-apikey',
             'api/v1/internal/exchange-token', // 내부 서버간 토큰 교환 (HMAC 인증 사용)
             'api/v1/admin/fcm/*',             // Admin FCM API (MNG에서 API Key만으로 접근)
+            'api/v1/app/*',                   // 앱 버전 확인/다운로드 (API Key만 필요)
         ];
 
         // 현재 라우트 확인 (경로 또는 이름)
diff --git a/app/Http/Requests/Document/ApproveRequest.php b/app/Http/Requests/Document/ApproveRequest.php
new file mode 100644
index 0000000..83da347
--- /dev/null
+++ b/app/Http/Requests/Document/ApproveRequest.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Http\Requests\Document;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class ApproveRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'comment' => 'nullable|string|max:500',
+        ];
+    }
+}
diff --git a/app/Http/Requests/Document/RejectRequest.php b/app/Http/Requests/Document/RejectRequest.php
new file mode 100644
index 0000000..e2946ff
--- /dev/null
+++ b/app/Http/Requests/Document/RejectRequest.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Http\Requests\Document;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class RejectRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'comment' => 'required|string|max:500',
+        ];
+    }
+}
diff --git a/app/Http/Requests/DocumentTemplate/IndexRequest.php b/app/Http/Requests/DocumentTemplate/IndexRequest.php
new file mode 100644
index 0000000..260c6cd
--- /dev/null
+++ b/app/Http/Requests/DocumentTemplate/IndexRequest.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Http\Requests\DocumentTemplate;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class IndexRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'is_active' => 'nullable|boolean',
+            'category' => 'nullable|string|max:50',
+            'search' => 'nullable|string|max:100',
+            'sort_by' => 'nullable|string|in:created_at,name,category',
+            'sort_dir' => 'nullable|string|in:asc,desc',
+            'per_page' => 'nullable|integer|min:1|max:100',
+            'page' => 'nullable|integer|min:1',
+        ];
+    }
+}
diff --git a/app/Models/AppVersion.php b/app/Models/AppVersion.php
new file mode 100644
index 0000000..4129a64
--- /dev/null
+++ b/app/Models/AppVersion.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class AppVersion extends Model
+{
+    use SoftDeletes;
+
+    protected $fillable = [
+        'version_code',
+        'version_name',
+        'platform',
+        'release_notes',
+        'apk_path',
+        'apk_size',
+        'apk_original_name',
+        'force_update',
+        'is_active',
+        'download_count',
+        'published_at',
+        'created_by',
+        'updated_by',
+    ];
+
+    protected $casts = [
+        'version_code' => 'integer',
+        'apk_size' => 'integer',
+        'force_update' => 'boolean',
+        'is_active' => 'boolean',
+        'download_count' => 'integer',
+        'published_at' => 'datetime',
+    ];
+}
diff --git a/app/Models/Documents/Document.php b/app/Models/Documents/Document.php
index 6f3b2c2..1f5b4ed 100644
--- a/app/Models/Documents/Document.php
+++ b/app/Models/Documents/Document.php
@@ -96,7 +96,7 @@ class Document extends Model
      */
     public function template(): BelongsTo
     {
-        return $this->belongsTo(\App\Models\DocumentTemplate::class, 'template_id');
+        return $this->belongsTo(DocumentTemplate::class, 'template_id');
     }
 
     /**
diff --git a/app/Models/Documents/DocumentTemplate.php b/app/Models/Documents/DocumentTemplate.php
new file mode 100644
index 0000000..a1dd054
--- /dev/null
+++ b/app/Models/Documents/DocumentTemplate.php
@@ -0,0 +1,113 @@
+<?php
+
+namespace App\Models\Documents;
+
+use App\Traits\BelongsToTenant;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+/**
+ * 문서 양식(템플릿) 모델
+ *
+ * @property int $id
+ * @property int $tenant_id
+ * @property string $name 양식명
+ * @property string $category 분류 (품질, 생산 등)
+ * @property string|null $title 문서 제목
+ * @property string|null $company_name 회사명
+ * @property string|null $company_address 회사 주소
+ * @property string|null $company_contact 연락처
+ * @property string $footer_remark_label 하단 비고 라벨
+ * @property string $footer_judgement_label 하단 판정 라벨
+ * @property array|null $footer_judgement_options 판정 옵션 (JSON)
+ * @property bool $is_active 활성 여부
+ * @property \Carbon\Carbon|null $created_at
+ * @property \Carbon\Carbon|null $updated_at
+ * @property \Carbon\Carbon|null $deleted_at
+ */
+class DocumentTemplate extends Model
+{
+    use BelongsToTenant, SoftDeletes;
+
+    protected $table = 'document_templates';
+
+    protected $fillable = [
+        'tenant_id',
+        'name',
+        'category',
+        'title',
+        'company_name',
+        'company_address',
+        'company_contact',
+        'footer_remark_label',
+        'footer_judgement_label',
+        'footer_judgement_options',
+        'is_active',
+    ];
+
+    protected $casts = [
+        'footer_judgement_options' => 'array',
+        'is_active' => 'boolean',
+    ];
+
+    // =========================================================================
+    // Relationships
+    // =========================================================================
+
+    /**
+     * 결재라인
+     */
+    public function approvalLines(): HasMany
+    {
+        return $this->hasMany(DocumentTemplateApprovalLine::class, 'template_id')
+            ->orderBy('sort_order');
+    }
+
+    /**
+     * 기본 필드
+     */
+    public function basicFields(): HasMany
+    {
+        return $this->hasMany(DocumentTemplateBasicField::class, 'template_id')
+            ->orderBy('sort_order');
+    }
+
+    /**
+     * 검사 기준서 섹션
+     */
+    public function sections(): HasMany
+    {
+        return $this->hasMany(DocumentTemplateSection::class, 'template_id')
+            ->orderBy('sort_order');
+    }
+
+    /**
+     * 테이블 컬럼
+     */
+    public function columns(): HasMany
+    {
+        return $this->hasMany(DocumentTemplateColumn::class, 'template_id')
+            ->orderBy('sort_order');
+    }
+
+    // =========================================================================
+    // Scopes
+    // =========================================================================
+
+    /**
+     * 활성 양식만
+     */
+    public function scopeActive($query)
+    {
+        return $query->where('is_active', true);
+    }
+
+    /**
+     * 카테고리 필터
+     */
+    public function scopeCategory($query, string $category)
+    {
+        return $query->where('category', $category);
+    }
+}
diff --git a/app/Models/Documents/DocumentTemplateApprovalLine.php b/app/Models/Documents/DocumentTemplateApprovalLine.php
new file mode 100644
index 0000000..b6b274b
--- /dev/null
+++ b/app/Models/Documents/DocumentTemplateApprovalLine.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Models\Documents;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * 문서 양식 결재라인 모델
+ *
+ * @property int $id
+ * @property int $template_id
+ * @property string $name 결재자 이름/직책
+ * @property string|null $dept 부서
+ * @property string $role 역할 (작성/검토/승인)
+ * @property int $sort_order 정렬 순서
+ */
+class DocumentTemplateApprovalLine extends Model
+{
+    protected $table = 'document_template_approval_lines';
+
+    protected $fillable = [
+        'template_id',
+        'name',
+        'dept',
+        'role',
+        'sort_order',
+    ];
+
+    protected $casts = [
+        'sort_order' => 'integer',
+    ];
+
+    public function template(): BelongsTo
+    {
+        return $this->belongsTo(DocumentTemplate::class, 'template_id');
+    }
+}
diff --git a/app/Models/Documents/DocumentTemplateBasicField.php b/app/Models/Documents/DocumentTemplateBasicField.php
new file mode 100644
index 0000000..c2e22c6
--- /dev/null
+++ b/app/Models/Documents/DocumentTemplateBasicField.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Models\Documents;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * 문서 양식 기본필드 모델
+ *
+ * @property int $id
+ * @property int $template_id
+ * @property string $label 필드 라벨
+ * @property string $field_type 필드 타입 (text/date/select 등)
+ * @property string|null $default_value 기본값
+ * @property int $sort_order 정렬 순서
+ */
+class DocumentTemplateBasicField extends Model
+{
+    protected $table = 'document_template_basic_fields';
+
+    protected $fillable = [
+        'template_id',
+        'label',
+        'field_type',
+        'default_value',
+        'sort_order',
+    ];
+
+    protected $casts = [
+        'sort_order' => 'integer',
+    ];
+
+    public function template(): BelongsTo
+    {
+        return $this->belongsTo(DocumentTemplate::class, 'template_id');
+    }
+}
diff --git a/app/Models/Documents/DocumentTemplateColumn.php b/app/Models/Documents/DocumentTemplateColumn.php
new file mode 100644
index 0000000..af39ef2
--- /dev/null
+++ b/app/Models/Documents/DocumentTemplateColumn.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Models\Documents;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * 문서 양식 테이블 컬럼 모델
+ *
+ * @property int $id
+ * @property int $template_id
+ * @property string $label 컬럼 라벨
+ * @property string|null $width 컬럼 너비
+ * @property string $column_type 컬럼 타입 (text/check/complex/select/measurement)
+ * @property string|null $group_name 그룹명
+ * @property array|null $sub_labels 하위 라벨 (complex 타입)
+ * @property int $sort_order 정렬 순서
+ */
+class DocumentTemplateColumn extends Model
+{
+    protected $table = 'document_template_columns';
+
+    protected $fillable = [
+        'template_id',
+        'label',
+        'width',
+        'column_type',
+        'group_name',
+        'sub_labels',
+        'sort_order',
+    ];
+
+    protected $casts = [
+        'sub_labels' => 'array',
+        'sort_order' => 'integer',
+    ];
+
+    public function template(): BelongsTo
+    {
+        return $this->belongsTo(DocumentTemplate::class, 'template_id');
+    }
+}
diff --git a/app/Models/Documents/DocumentTemplateSection.php b/app/Models/Documents/DocumentTemplateSection.php
new file mode 100644
index 0000000..1346f35
--- /dev/null
+++ b/app/Models/Documents/DocumentTemplateSection.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Models\Documents;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+/**
+ * 문서 양식 섹션 모델
+ *
+ * @property int $id
+ * @property int $template_id
+ * @property string $title 섹션 제목
+ * @property string|null $image_path 검사 기준 이미지 경로
+ * @property int $sort_order 정렬 순서
+ */
+class DocumentTemplateSection extends Model
+{
+    protected $table = 'document_template_sections';
+
+    protected $fillable = [
+        'template_id',
+        'title',
+        'image_path',
+        'sort_order',
+    ];
+
+    protected $casts = [
+        'sort_order' => 'integer',
+    ];
+
+    public function template(): BelongsTo
+    {
+        return $this->belongsTo(DocumentTemplate::class, 'template_id');
+    }
+
+    public function items(): HasMany
+    {
+        return $this->hasMany(DocumentTemplateSectionItem::class, 'section_id')
+            ->orderBy('sort_order');
+    }
+}
diff --git a/app/Models/Documents/DocumentTemplateSectionItem.php b/app/Models/Documents/DocumentTemplateSectionItem.php
new file mode 100644
index 0000000..b61fd5e
--- /dev/null
+++ b/app/Models/Documents/DocumentTemplateSectionItem.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Models\Documents;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * 문서 양식 섹션 검사항목 모델
+ *
+ * @property int $id
+ * @property int $section_id
+ * @property string|null $category 항목 분류
+ * @property string $item 검사항목
+ * @property string|null $standard 검사기준
+ * @property string|null $method 검사방식
+ * @property string|null $frequency 검사주기
+ * @property string|null $regulation 관련 규격
+ * @property int $sort_order 정렬 순서
+ */
+class DocumentTemplateSectionItem extends Model
+{
+    protected $table = 'document_template_section_items';
+
+    protected $fillable = [
+        'section_id',
+        'category',
+        'item',
+        'standard',
+        'method',
+        'frequency',
+        'regulation',
+        'sort_order',
+    ];
+
+    protected $casts = [
+        'sort_order' => 'integer',
+    ];
+
+    public function section(): BelongsTo
+    {
+        return $this->belongsTo(DocumentTemplateSection::class, 'section_id');
+    }
+}
diff --git a/app/Services/AppVersionService.php b/app/Services/AppVersionService.php
new file mode 100644
index 0000000..465a4b5
--- /dev/null
+++ b/app/Services/AppVersionService.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\AppVersion;
+use Illuminate\Support\Facades\Storage;
+use Symfony\Component\HttpFoundation\StreamedResponse;
+
+class AppVersionService
+{
+    /**
+     * 최신 버전 확인
+     */
+    public static function getLatestVersion(string $platform, int $currentVersionCode): array
+    {
+        $latest = AppVersion::where('platform', $platform)
+            ->where('is_active', true)
+            ->whereNotNull('published_at')
+            ->orderByDesc('version_code')
+            ->first();
+
+        if (! $latest || $latest->version_code <= $currentVersionCode) {
+            return [
+                'has_update' => false,
+                'latest_version' => null,
+            ];
+        }
+
+        return [
+            'has_update' => true,
+            'latest_version' => [
+                'id' => $latest->id,
+                'version_code' => $latest->version_code,
+                'version_name' => $latest->version_name,
+                'release_notes' => $latest->release_notes,
+                'force_update' => $latest->force_update,
+                'apk_size' => $latest->apk_size,
+                'download_url' => url("/api/v1/app/download/{$latest->id}"),
+                'published_at' => $latest->published_at?->format('Y-m-d'),
+            ],
+        ];
+    }
+
+    /**
+     * APK 다운로드
+     */
+    public static function downloadApk(int $id): StreamedResponse
+    {
+        $version = AppVersion::where('is_active', true)->findOrFail($id);
+
+        if (! $version->apk_path || ! Storage::disk('app_releases')->exists($version->apk_path)) {
+            abort(404, 'APK 파일을 찾을 수 없습니다.');
+        }
+
+        // 다운로드 수 증가
+        $version->increment('download_count');
+
+        $fileName = $version->apk_original_name ?: "app-v{$version->version_name}.apk";
+
+        return Storage::disk('app_releases')->download($version->apk_path, $fileName);
+    }
+}
diff --git a/app/Services/DocumentTemplateService.php b/app/Services/DocumentTemplateService.php
new file mode 100644
index 0000000..bbce2c5
--- /dev/null
+++ b/app/Services/DocumentTemplateService.php
@@ -0,0 +1,67 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\Documents\DocumentTemplate;
+use Illuminate\Contracts\Pagination\LengthAwarePaginator;
+
+class DocumentTemplateService extends Service
+{
+    /**
+     * 양식 목록 조회
+     */
+    public function list(array $params): LengthAwarePaginator
+    {
+        $tenantId = $this->tenantId();
+
+        $query = DocumentTemplate::query()
+            ->where('tenant_id', $tenantId)
+            ->with(['approvalLines', 'basicFields']);
+
+        // 활성 상태 필터
+        if (isset($params['is_active'])) {
+            $query->where('is_active', filter_var($params['is_active'], FILTER_VALIDATE_BOOLEAN));
+        }
+
+        // 카테고리 필터
+        if (! empty($params['category'])) {
+            $query->where('category', $params['category']);
+        }
+
+        // 검색 (양식명)
+        if (! empty($params['search'])) {
+            $search = $params['search'];
+            $query->where(function ($q) use ($search) {
+                $q->where('name', 'like', "%{$search}%")
+                    ->orWhere('title', 'like', "%{$search}%");
+            });
+        }
+
+        // 정렬
+        $sortBy = $params['sort_by'] ?? 'created_at';
+        $sortDir = $params['sort_dir'] ?? 'desc';
+        $query->orderBy($sortBy, $sortDir);
+
+        $perPage = $params['per_page'] ?? 20;
+
+        return $query->paginate($perPage);
+    }
+
+    /**
+     * 양식 상세 조회 (전체 관계 포함)
+     */
+    public function show(int $id): DocumentTemplate
+    {
+        $tenantId = $this->tenantId();
+
+        return DocumentTemplate::query()
+            ->where('tenant_id', $tenantId)
+            ->with([
+                'approvalLines',
+                'basicFields',
+                'sections.items',
+                'columns',
+            ])
+            ->findOrFail($id);
+    }
+}
diff --git a/app/Services/Quote/FormulaEvaluatorService.php b/app/Services/Quote/FormulaEvaluatorService.php
index e679490..0e3098f 100644
--- a/app/Services/Quote/FormulaEvaluatorService.php
+++ b/app/Services/Quote/FormulaEvaluatorService.php
@@ -1627,27 +1627,45 @@ private function calculateKyungdongBom(
         // KyungdongFormulaHandler 인스턴스 생성
         $handler = new KyungdongFormulaHandler;
 
-        // Step 3: 경동 전용 변수 계산
+        // Step 3: 경동 전용 변수 계산 (제품타입별 면적/중량 공식)
         $W1 = $W0 + 160;
         $H1 = $H0 + 350;
-        $area = ($W1 * ($H1 + 550)) / 1000000;
 
-        // 중량 계산 (제품타입별)
-        if ($productType === 'steel') {
+        if ($productType === 'slat') {
+            // 슬랫: W0 × (H0 + 50) / 1M
+            $area = ($W0 * ($H0 + 50)) / 1000000;
             $weight = $area * 25;
-            $weightFormula = "AREA × 25";
+            $areaFormula = '(W0 × (H0 + 50)) / 1,000,000';
+            $areaCalc = "({$W0} × ({$H0} + 50)) / 1,000,000";
+            $weightFormula = 'AREA × 25';
+            $weightCalc = "{$area} × 25";
+        } elseif ($productType === 'steel') {
+            // 철재: W1 × (H1 + 550) / 1M, 중량 = 면적 × 25
+            $area = ($W1 * ($H1 + 550)) / 1000000;
+            $weight = $area * 25;
+            $areaFormula = '(W1 × (H1 + 550)) / 1,000,000';
+            $areaCalc = "({$W1} × ({$H1} + 550)) / 1,000,000";
+            $weightFormula = 'AREA × 25';
             $weightCalc = "{$area} × 25";
         } else {
+            // 스크린: W1 × (H1 + 550) / 1M
+            $area = ($W1 * ($H1 + 550)) / 1000000;
             $weight = $area * 2 + ($W0 / 1000) * 14.17;
-            $weightFormula = "AREA × 2 + (W0 / 1000) × 14.17";
+            $areaFormula = '(W1 × (H1 + 550)) / 1,000,000';
+            $areaCalc = "({$W1} × ({$H1} + 550)) / 1,000,000";
+            $weightFormula = 'AREA × 2 + (W0 / 1000) × 14.17';
             $weightCalc = "{$area} × 2 + ({$W0} / 1000) × 14.17";
         }
 
-        // 모터 용량 결정
-        $motorCapacity = $handler->calculateMotorCapacity($productType, $weight, $bracketInch);
+        // 모터 용량 결정 (입력값 우선, 없으면 자동계산)
+        $motorCapacity = $inputVariables['MOTOR_CAPACITY']
+            ?? $inputVariables['motor_capacity']
+            ?? $handler->calculateMotorCapacity($productType, $weight, $bracketInch);
 
-        // 브라켓 크기 결정
-        $bracketSize = $handler->calculateBracketSize($weight, $bracketInch);
+        // 브라켓 크기 결정 (입력값 우선, 없으면 자동계산)
+        $bracketSize = $inputVariables['BRACKET_SIZE']
+            ?? $inputVariables['bracket_size']
+            ?? $handler->calculateBracketSize($weight, $bracketInch);
 
         // 핸들러가 필요한 키 보장 (inputVariables에서 전달되지 않으면 기본값)
         $productModel = $inputVariables['product_model'] ?? 'KSS01';
@@ -1692,8 +1710,8 @@ private function calculateKyungdongBom(
                 [
                     'var' => 'AREA',
                     'desc' => '면적',
-                    'formula' => '(W1 × (H1 + 550)) / 1,000,000',
-                    'calculation' => "({$W1} × ({$H1} + 550)) / 1,000,000",
+                    'formula' => $areaFormula,
+                    'calculation' => $areaCalc,
                     'result' => round($area, 4),
                     'unit' => '㎡',
                 ],
diff --git a/app/Services/Quote/Handlers/KyungdongFormulaHandler.php b/app/Services/Quote/Handlers/KyungdongFormulaHandler.php
index 1d6fe4d..2239b6d 100644
--- a/app/Services/Quote/Handlers/KyungdongFormulaHandler.php
+++ b/app/Services/Quote/Handlers/KyungdongFormulaHandler.php
@@ -229,12 +229,10 @@ private function getMotorCapacityByWeight(float $weight, ?string $bracketInch =
      */
     public function calculateScreenPrice(float $width, float $height): array
     {
-        // 면적 계산: W1 × (H1 + 550) / 1,000,000
-        // W1 = W0 + 160, H1 = H0 + 350 (레거시 5130 공식)
-        $W1 = $width + 160;
-        $H1 = $height + 350;
-        $calculateHeight = $H1 + 550;
-        $area = ($W1 * $calculateHeight) / 1000000;
+        // 면적 계산: W0 × (H0 + 550) / 1,000,000
+        // 5130 공식: col10 × (col11 + 550) / 1,000,000
+        $calculateHeight = $height + 550;
+        $area = ($width * $calculateHeight) / 1000000;
 
         // 원자재 단가 조회 (실리카/스크린)
         $unitPrice = $this->getRawMaterialPrice('실리카');
@@ -249,6 +247,29 @@ public function calculateScreenPrice(float $width, float $height): array
         ];
     }
 
+    /**
+     * 슬랫(철재) 주자재 가격 계산
+     * 5130 공식: W0 × (H0 + 50) / 1,000,000 × 단가
+     *
+     * @return array [unit_price, area, total_price]
+     */
+    public function calculateSlatPrice(float $width, float $height): array
+    {
+        $calculateHeight = $height + 50;
+        $area = ($width * $calculateHeight) / 1000000;
+
+        // 원자재 단가 조회 (방화/슬랫)
+        $unitPrice = $this->getRawMaterialPrice('방화');
+
+        $roundedArea = round($area, 2);
+
+        return [
+            'unit_price' => $unitPrice,
+            'area' => $roundedArea,
+            'total_price' => round($unitPrice * $roundedArea),
+        ];
+    }
+
     // =========================================================================
     // 단가 조회 메서드 (EstimatePriceService 사용)
     // =========================================================================
@@ -285,6 +306,33 @@ public function getShaftPrice(string $size, float $length): float
         return $this->priceService->getShaftPrice($size, $length);
     }
 
+    /**
+     * 5130 고정 샤프트 제품 규격 매핑
+     * col59~65: 3인치 300, 4인치 3000/4500/6000, 5인치 6000/7000/8200
+     *
+     * @param  string  $size  인치 (3, 4, 5)
+     * @param  float  $lengthMm  W0 올림값 (mm)
+     * @return float 매핑된 길이 (m 단위), 0이면 매핑 불가
+     */
+    private function mapShaftToFixedProduct(string $size, float $lengthMm): float
+    {
+        $products = match ($size) {
+            '3' => [300],
+            '4' => [3000, 4500, 6000],
+            '5' => [6000, 7000, 8200],
+            default => [6000, 7000, 8200],  // 기본 5인치
+        };
+
+        // 올림값 이상인 제품 중 가장 작은 것 선택
+        foreach ($products as $productMm) {
+            if ($lengthMm <= $productMm) {
+                return $productMm / 1000;  // mm → m
+            }
+        }
+
+        return 0;  // 매핑 불가 (초과)
+    }
+
     /**
      * 파이프 단가 조회
      */
@@ -335,14 +383,17 @@ public function calculateSteelItems(array $params): array
         $width = (float) ($params['W0'] ?? 0);
         $height = (float) ($params['H0'] ?? 0);
         $quantity = (int) ($params['QTY'] ?? 1);
+        $productType = $params['product_type'] ?? 'screen';
         $modelName = $params['model_name'] ?? $params['product_model'] ?? 'KSS01';
-        $finishingType = $params['finishing_type'] ?? 'SUS';
+        $rawFinish = $params['finishing_type'] ?? 'SUS';
+        // DB에는 'SUS', 'EGI'로 저장 → 'SUS마감' → 'SUS' 변환
+        $finishingType = str_replace('마감', '', $rawFinish);
 
         // 절곡품 관련 파라미터
         $caseSpec = $params['case_spec'] ?? '500*380';
         $caseLength = (float) ($params['case_length'] ?? ($width + 220));  // mm 단위 (레거시: W0+220)
-        $guideType = $params['guide_type'] ?? '벽면형';  // 벽면형, 측면형, 혼합형
-        $guideSpec = $params['guide_spec'] ?? '120*70';  // 120*70, 120*100
+        $guideType = $this->normalizeGuideType($params['guide_type'] ?? '벽면형');
+        $guideSpec = $params['guide_spec'] ?? $params['guide_rail_spec'] ?? '120*70';
         $guideLength = (float) ($params['guide_length'] ?? ($height + 250)) / 1000;  // m 단위 (레거시: H0+250)
         $bottomBarLength = (float) ($params['bottombar_length'] ?? $width) / 1000;  // m 단위 (레거시: W0)
         $lbarLength = (float) ($params['lbar_length'] ?? ($width + 220)) / 1000;  // m 단위 (레거시: W0+220)
@@ -368,7 +419,8 @@ public function calculateSteelItems(array $params): array
         // 1. 케이스 (단가/1000 × 길이mm × 수량)
         $casePrice = $this->priceService->getCasePrice($caseSpec);
         if ($casePrice > 0 && $caseLength > 0) {
-            $totalPrice = ($casePrice / 1000) * $caseLength * $quantity;
+            // 5130: round($shutter_price * $total_length * 1000) * $su → 단건 반올림 후 × QTY
+            $perUnitPrice = round(($casePrice / 1000) * $caseLength);
             $items[] = [
                 'category' => 'steel',
                 'item_name' => '케이스',
@@ -376,14 +428,15 @@ public function calculateSteelItems(array $params): array
                 'unit' => 'm',
                 'quantity' => $caseLength / 1000 * $quantity,
                 'unit_price' => $casePrice,
-                'total_price' => round($totalPrice),
+                'total_price' => $perUnitPrice * $quantity,
             ];
         }
 
-        // 2. 케이스용 연기차단재 (단가 × 길이m × 수량)
+        // 2. 케이스용 연기차단재 - 5130: round(단가 × 길이m) × QTY
         $caseSmokePrice = $this->priceService->getCaseSmokeBlockPrice();
         if ($caseSmokePrice > 0 && $caseLength > 0) {
             $lengthM = $caseLength / 1000;
+            $perUnitSmoke = round($caseSmokePrice * $lengthM);
             $items[] = [
                 'category' => 'steel',
                 'item_name' => '케이스용 연기차단재',
@@ -391,16 +444,15 @@ public function calculateSteelItems(array $params): array
                 'unit' => 'm',
                 'quantity' => $lengthM * $quantity,
                 'unit_price' => $caseSmokePrice,
-                'total_price' => round($caseSmokePrice * $lengthM * $quantity),
+                'total_price' => $perUnitSmoke * $quantity,
             ];
         }
 
-        // 3. 케이스 마구리 (단가 × 수량)
-        // 마구리 규격 = 케이스 규격 각 치수 + 5mm (레거시 updateCol45 공식)
+        // 3. 케이스 마구리 - 5130: round(단가 × QTY)
         $caseCapSpec = $this->convertToCaseCapSpec($caseSpec);
         $caseCapPrice = $this->priceService->getCaseCapPrice($caseCapSpec);
         if ($caseCapPrice > 0) {
-            $capQty = $quantity;  // 5130: maguriPrices × $su (수량)
+            $capQty = $quantity;
             $items[] = [
                 'category' => 'steel',
                 'item_name' => '케이스 마구리',
@@ -416,18 +468,20 @@ public function calculateSteelItems(array $params): array
         $guideItems = $this->calculateGuideRails($modelName, $finishingType, $guideType, $guideSpec, $guideLength, $quantity);
         $items = array_merge($items, $guideItems);
 
-        // 5. 레일용 연기차단재 (단가 × 길이m × 2 × 수량)
+        // 5. 레일용 연기차단재 - 5130: round(단가 × 길이m) × multiplier × QTY
         $railSmokePrice = $this->priceService->getRailSmokeBlockPrice();
         if ($railSmokePrice > 0 && $guideLength > 0) {
-            $railSmokeQty = 2 * $quantity;  // 좌우 2개
+            $railSmokeMultiplier = ($productType === 'slat') ? 1 : 2;
+            $railSmokeQty = $railSmokeMultiplier * $quantity;
+            $perUnitRailSmoke = round($railSmokePrice * $guideLength);
             $items[] = [
                 'category' => 'steel',
                 'item_name' => '레일용 연기차단재',
-                'specification' => "{$guideLength}m × 2",
+                'specification' => ($railSmokeMultiplier > 1) ? "{$guideLength}m × 2" : "{$guideLength}m",
                 'unit' => 'm',
                 'quantity' => $guideLength * $railSmokeQty,
                 'unit_price' => $railSmokePrice,
-                'total_price' => round($railSmokePrice * $guideLength * $railSmokeQty),
+                'total_price' => $perUnitRailSmoke * $railSmokeQty,
             ];
         }
 
@@ -445,8 +499,8 @@ public function calculateSteelItems(array $params): array
             ];
         }
 
-        // 7. L바 (단가 × 길이m × 수량)
-        $lbarPrice = $this->priceService->getLBarPrice($modelName);
+        // 7. L바 (단가 × 길이m × 수량) - 스크린 전용, 슬랫 미사용
+        $lbarPrice = ($productType !== 'slat') ? $this->priceService->getLBarPrice($modelName) : 0;
         if ($lbarPrice > 0 && $lbarLength > 0) {
             $items[] = [
                 'category' => 'steel',
@@ -459,8 +513,8 @@ public function calculateSteelItems(array $params): array
             ];
         }
 
-        // 8. 보강평철 (단가 × 길이m × 수량)
-        $flatBarPrice = $this->priceService->getFlatBarPrice();
+        // 8. 보강평철 (단가 × 길이m × 수량) - 스크린 전용, 슬랫 미사용
+        $flatBarPrice = ($productType !== 'slat') ? $this->priceService->getFlatBarPrice() : 0;
         if ($flatBarPrice > 0 && $flatBarLength > 0) {
             $items[] = [
                 'category' => 'steel',
@@ -487,17 +541,17 @@ public function calculateSteelItems(array $params): array
             ];
         }
 
-        // 10. 환봉 (고정 2,000원 × 수량)
-        if ($roundBarQty > 0) {
+        // 10. 환봉 (고정 2,000원 × 수량) - 스크린 전용, 슬랫 미사용
+        if ($roundBarQty > 0 && $productType !== 'slat') {
             $roundBarPrice = 2000;
             $items[] = [
                 'category' => 'steel',
                 'item_name' => '환봉',
                 'specification' => '',
                 'unit' => 'EA',
-                'quantity' => $roundBarQty * $quantity,
+                'quantity' => $roundBarQty,
                 'unit_price' => $roundBarPrice,
-                'total_price' => $roundBarPrice * $roundBarQty * $quantity,
+                'total_price' => $roundBarPrice * $roundBarQty,
             ];
         }
 
@@ -515,6 +569,23 @@ public function calculateSteelItems(array $params): array
      * @param  int  $quantity  수량
      * @return array 가이드레일 항목 배열
      */
+    /**
+     * 모델별 가이드레일 규격 매핑
+     *
+     * BDmodels 테이블 기준:
+     * KSS01/02, KSE01, KWE01 → 120*70 / 120*120
+     * KTE01, KQTS01           → 130*75 / 130*125
+     * KDSS01                  → 150*150 / 150*212
+     */
+    private function getGuideRailSpecs(string $modelName): array
+    {
+        return match ($modelName) {
+            'KTE01', 'KQTS01' => ['wall' => '130*75', 'side' => '130*125'],
+            'KDSS01' => ['wall' => '150*150', 'side' => '150*212'],
+            default => ['wall' => '120*70', 'side' => '120*120'],
+        };
+    }
+
     private function calculateGuideRails(
         string $modelName,
         string $finishingType,
@@ -529,66 +600,63 @@ private function calculateGuideRails(
             return $items;
         }
 
+        $specs = $this->getGuideRailSpecs($modelName);
+        $wallSpec = $specs['wall'];
+        $sideSpec = $specs['side'];
+
+        // 5130: 세트가격(단가×2 또는 wall+side) → round(세트가격 × 길이m) × QTY
         switch ($guideType) {
             case '벽면형':
-                // 120*70 × 2개
-                $price = $this->priceService->getGuideRailPrice($modelName, $finishingType, '120*70');
+                $price = $this->priceService->getGuideRailPrice($modelName, $finishingType, $wallSpec);
                 if ($price > 0) {
-                    $guideQty = 2 * $quantity;
+                    $setPrice = $price * 2;  // 5130: 2개 세트 가격
+                    $perSetTotal = round($setPrice * $guideLength);
                     $items[] = [
                         'category' => 'steel',
                         'item_name' => '가이드레일',
-                        'specification' => "{$modelName} {$finishingType} 120*70 {$guideLength}m × 2",
+                        'specification' => "{$modelName} {$finishingType} {$wallSpec} {$guideLength}m × 2",
                         'unit' => 'm',
-                        'quantity' => $guideLength * $guideQty,
+                        'quantity' => $guideLength * 2 * $quantity,
                         'unit_price' => $price,
-                        'total_price' => round($price * $guideLength * $guideQty),
+                        'total_price' => $perSetTotal * $quantity,
                     ];
                 }
                 break;
 
             case '측면형':
-                // 120*100 × 2개
-                $price = $this->priceService->getGuideRailPrice($modelName, $finishingType, '120*100');
+                $price = $this->priceService->getGuideRailPrice($modelName, $finishingType, $sideSpec);
                 if ($price > 0) {
-                    $guideQty = 2 * $quantity;
+                    $setPrice = $price * 2;  // 5130: 2개 세트 가격
+                    $perSetTotal = round($setPrice * $guideLength);
                     $items[] = [
                         'category' => 'steel',
                         'item_name' => '가이드레일',
-                        'specification' => "{$modelName} {$finishingType} 120*100 {$guideLength}m × 2",
+                        'specification' => "{$modelName} {$finishingType} {$sideSpec} {$guideLength}m × 2",
                         'unit' => 'm',
-                        'quantity' => $guideLength * $guideQty,
+                        'quantity' => $guideLength * 2 * $quantity,
                         'unit_price' => $price,
-                        'total_price' => round($price * $guideLength * $guideQty),
+                        'total_price' => $perSetTotal * $quantity,
                     ];
                 }
                 break;
 
             case '혼합형':
-                // 120*70 × 1개 + 120*100 × 1개
-                $price70 = $this->priceService->getGuideRailPrice($modelName, $finishingType, '120*70');
-                $price100 = $this->priceService->getGuideRailPrice($modelName, $finishingType, '120*100');
+                $priceWall = $this->priceService->getGuideRailPrice($modelName, $finishingType, $wallSpec);
+                $priceSide = $this->priceService->getGuideRailPrice($modelName, $finishingType, $sideSpec);
 
-                if ($price70 > 0) {
+                // 5130: (wallPrice + sidePrice) → round(합산가격 × 길이m) × QTY (단일 항목)
+                $setPrice = ($priceWall ?: 0) + ($priceSide ?: 0);
+                if ($setPrice > 0) {
+                    $perSetTotal = round($setPrice * $guideLength);
+                    $spec = "{$modelName} {$finishingType} {$wallSpec}/{$sideSpec} {$guideLength}m";
                     $items[] = [
                         'category' => 'steel',
                         'item_name' => '가이드레일',
-                        'specification' => "{$modelName} {$finishingType} 120*70 {$guideLength}m",
+                        'specification' => $spec,
                         'unit' => 'm',
-                        'quantity' => $guideLength * $quantity,
-                        'unit_price' => $price70,
-                        'total_price' => round($price70 * $guideLength * $quantity),
-                    ];
-                }
-                if ($price100 > 0) {
-                    $items[] = [
-                        'category' => 'steel',
-                        'item_name' => '가이드레일',
-                        'specification' => "{$modelName} {$finishingType} 120*100 {$guideLength}m",
-                        'unit' => 'm',
-                        'quantity' => $guideLength * $quantity,
-                        'unit_price' => $price100,
-                        'total_price' => round($price100 * $guideLength * $quantity),
+                        'quantity' => $guideLength * 2 * $quantity,
+                        'unit_price' => $setPrice,
+                        'total_price' => $perSetTotal * $quantity,
                     ];
                 }
                 break;
@@ -597,6 +665,22 @@ private function calculateGuideRails(
         return $items;
     }
 
+    /**
+     * 가이드타입 정규화 (5130 ↔ SAM 호환)
+     *
+     * 5130: '벽면', '측면', '혼합' (col6 필드)
+     * SAM: '벽면형', '측면형', '혼합형' (switch case)
+     */
+    private function normalizeGuideType(string $type): string
+    {
+        return match ($type) {
+            '벽면', '벽면형' => '벽면형',
+            '측면', '측면형' => '측면형',
+            '혼합', '혼합형' => '혼합형',
+            default => $type,
+        };
+    }
+
     // =========================================================================
     // 부자재 계산 (3종)
     // =========================================================================
@@ -617,10 +701,12 @@ public function calculatePartItems(array $params): array
         $productType = $params['product_type'] ?? 'screen';
         $quantity = (int) ($params['QTY'] ?? 1);
 
-        // 1. 감기샤프트
+        // 1. 감기샤프트 (5130: col59~65 고정 제품)
+        // 5130 고정 규격: 3인치→0.3m, 4인치→3/4.5/6m, 5인치→6/7/8.2m
         $shaftSize = $bracketInch;
-        $shaftLength = ceil($width / 1000);  // mm → m 변환 후 올림
-        $shaftPrice = $this->getShaftPrice($shaftSize, $shaftLength);
+        $shaftLengthMm = ceil($width / 1000) * 1000;  // W0 → 올림 (mm)
+        $shaftLength = $this->mapShaftToFixedProduct($shaftSize, $shaftLengthMm);
+        $shaftPrice = $shaftLength > 0 ? $this->getShaftPrice($shaftSize, $shaftLength) : 0;
         if ($shaftPrice > 0) {
             $items[] = [
                 'category' => 'parts',
@@ -700,11 +786,13 @@ public function calculatePartItems(array $params): array
 
         // 3. 모터 받침용 앵글 (bracket angle)
         // 5130: calculateAngle(qty, itemList, '스크린용') → col2 검색, qty × $su × 4
+        // 5130 슬랫: col23(앵글사이즈) 비어있으면 생략
         $motorCapacity = $params['MOTOR_CAPACITY'] ?? '300K';
+        $bracketAngleEnabled = (bool) ($params['bracket_angle_enabled'] ?? ($productType !== 'slat'));
         if ($productType === 'screen') {
             $angleSearchOption = '스크린용';
         } else {
-            // 철재: bracketSize로 매핑 (530*320→철제300K, 600*350→철제400K, 690*390→철제800K)
+            // 철재/슬랫: bracketSize로 매핑
             $angleSearchOption = match ($bracketSize) {
                 '530*320' => '철제300K',
                 '600*350' => '철제400K',
@@ -712,7 +800,7 @@ public function calculatePartItems(array $params): array
                 default => '철제300K',
             };
         }
-        $anglePrice = $this->getAnglePrice($angleSearchOption);
+        $anglePrice = $bracketAngleEnabled ? $this->getAnglePrice($angleSearchOption) : 0;
         if ($anglePrice > 0) {
             $angleQty = 4 * $quantity;  // 5130: $su * 4
             $items[] = [
@@ -727,10 +815,11 @@ public function calculatePartItems(array $params): array
         }
 
         // 4. 부자재 앵글 (main angle)
-        // 5130: calculateMainAngle(1, $itemList, '앵글3T', '2.5') × col71
-        $mainAngleType = $bracketSize === '690*390' ? '앵글4T' : '앵글3T';
+        // 스크린 5130: calculateMainAngle(1, $itemList, '앵글3T', '2.5') × col71
+        // 슬랫 5130: calculateMainAngle(1, $itemList, '앵글4T', '2.5') × col77
+        $mainAngleType = ($productType === 'slat') ? '앵글4T' : ($bracketSize === '690*390' ? '앵글4T' : '앵글3T');
         $mainAngleSize = '2.5';
-        $mainAngleQty = (int) ($params['main_angle_qty'] ?? 2);  // col71, default 2 (좌우)
+        $mainAngleQty = (int) ($params['main_angle_qty'] ?? 2);  // col71/col77, default 2 (좌우)
         $mainAnglePrice = $this->getMainAnglePrice($mainAngleType, $mainAngleSize);
         if ($mainAnglePrice > 0 && $mainAngleQty > 0) {
             $items[] = [
@@ -738,12 +827,31 @@ public function calculatePartItems(array $params): array
                 'item_name' => "앵글 {$mainAngleType}",
                 'specification' => "{$mainAngleSize}m",
                 'unit' => 'EA',
-                'quantity' => $mainAngleQty * $quantity,
+                'quantity' => $mainAngleQty,
                 'unit_price' => $mainAnglePrice,
-                'total_price' => $mainAnglePrice * $mainAngleQty * $quantity,
+                'total_price' => $mainAnglePrice * $mainAngleQty,
             ];
         }
 
+        // 5. 조인트바 (슬랫 전용, 5130: price × col76, QTY 미적용)
+        if ($productType === 'slat') {
+            $jointBarQty = (int) ($params['joint_bar_qty'] ?? 0);
+            if ($jointBarQty > 0) {
+                $jointBarPrice = $this->getRawMaterialPrice('조인트바');
+                if ($jointBarPrice > 0) {
+                    $items[] = [
+                        'category' => 'parts',
+                        'item_name' => '조인트바',
+                        'specification' => '',
+                        'unit' => 'EA',
+                        'quantity' => $jointBarQty,
+                        'unit_price' => $jointBarPrice,
+                        'total_price' => round($jointBarPrice * $jointBarQty),
+                    ];
+                }
+            }
+        }
+
         return $items;
     }
 
@@ -767,15 +875,26 @@ public function calculateDynamicItems(array $inputs): array
         $bracketInch = $inputs['bracket_inch'] ?? '5';
         $productType = $inputs['product_type'] ?? 'screen';
 
-        // 중량 계산 (5130 로직) - W1, H1 기반
-        $W1 = $width + 160;
-        $H1 = $height + 350;
-        $area = ($W1 * ($H1 + 550)) / 1000000;
-        $weight = $area * ($productType === 'steel' ? 25 : 2) + ($width / 1000) * 14.17;
+        // 중량 계산 (5130 로직) - 제품타입별 면적/중량 공식
+        if ($productType === 'slat') {
+            // 슬랫: W0 × (H0 + 50) / 1M, 중량 = 면적 × 25
+            $area = ($width * ($height + 50)) / 1000000;
+            $weight = $area * 25;
+        } else {
+            // 스크린/철재: W1 × (H1 + 550) / 1M
+            $W1 = $width + 160;
+            $H1 = $height + 350;
+            $area = ($W1 * ($H1 + 550)) / 1000000;
+            if ($productType === 'steel') {
+                $weight = $area * 25;
+            } else {
+                $weight = $area * 2 + ($width / 1000) * 14.17;
+            }
+        }
 
-        // 모터 용량/브라켓 크기 계산
-        $motorCapacity = $this->calculateMotorCapacity($productType, $weight, $bracketInch);
-        $bracketSize = $this->calculateBracketSize($weight, $bracketInch);
+        // 모터 용량/브라켓 크기 계산 (입력값 우선, 없으면 자동계산)
+        $motorCapacity = $inputs['MOTOR_CAPACITY'] ?? $this->calculateMotorCapacity($productType, $weight, $bracketInch);
+        $bracketSize = $inputs['BRACKET_SIZE'] ?? $this->calculateBracketSize($weight, $bracketInch);
 
         // 입력값에 계산된 값 추가 (부자재 계산용)
         $inputs['WEIGHT'] = $weight;
@@ -797,17 +916,25 @@ public function calculateDynamicItems(array $inputs): array
             ];
         }
 
-        // 1. 주자재 (스크린)
-        $screenResult = $this->calculateScreenPrice($width, $height);
+        // 1. 주자재 (스크린 또는 슬랫)
+        if ($productType === 'slat') {
+            $materialResult = $this->calculateSlatPrice($width, $height);
+            $materialName = '주자재(슬랫)';
+            $materialCode = 'KD-SLAT';
+        } else {
+            $materialResult = $this->calculateScreenPrice($width, $height);
+            $materialName = '주자재(스크린)';
+            $materialCode = 'KD-SCREEN';
+        }
         $items[] = [
             'category' => 'material',
-            'item_code' => 'KD-SCREEN',
-            'item_name' => '주자재(스크린)',
-            'specification' => "면적 {$screenResult['area']}㎡",
+            'item_code' => $materialCode,
+            'item_name' => $materialName,
+            'specification' => "면적 {$materialResult['area']}㎡",
             'unit' => '㎡',
-            'quantity' => $screenResult['area'] * $quantity,
-            'unit_price' => $screenResult['unit_price'],
-            'total_price' => $screenResult['total_price'] * $quantity,
+            'quantity' => $materialResult['area'] * $quantity,
+            'unit_price' => $materialResult['unit_price'],
+            'total_price' => $materialResult['total_price'] * $quantity,
         ];
 
         // 2. 모터
@@ -824,6 +951,8 @@ public function calculateDynamicItems(array $inputs): array
         ];
 
         // 3. 제어기 (5130: 매립형×col15 + 노출형×col16 + 뒷박스×col17)
+        // 5130: 제어기 = price_매립 × col15 + price_노출 × col16 + price_뒷박스 × col17
+        // col15/col16/col17은 고정 수량 (QTY와 무관, $su를 곱하지 않음)
         $controllerType = $inputs['controller_type'] ?? '매립형';
         $controllerQty = (int) ($inputs['controller_qty'] ?? 1);
         $controllerPrice = $this->getControllerPrice($controllerType);
@@ -834,13 +963,13 @@ public function calculateDynamicItems(array $inputs): array
                 'item_name' => "제어기 {$controllerType}",
                 'specification' => $controllerType,
                 'unit' => 'EA',
-                'quantity' => $controllerQty * $quantity,
+                'quantity' => $controllerQty,
                 'unit_price' => $controllerPrice,
-                'total_price' => $controllerPrice * $controllerQty * $quantity,
+                'total_price' => $controllerPrice * $controllerQty,
             ];
         }
 
-        // 뒷박스 (5130: col17 수량)
+        // 뒷박스 (5130: col17 수량, QTY와 무관)
         $backboxQty = (int) ($inputs['backbox_qty'] ?? 1);
         if ($backboxQty > 0) {
             $backboxPrice = $this->getControllerPrice('뒷박스');
@@ -851,14 +980,18 @@ public function calculateDynamicItems(array $inputs): array
                     'item_name' => '뒷박스',
                     'specification' => '',
                     'unit' => 'EA',
-                    'quantity' => $backboxQty * $quantity,
+                    'quantity' => $backboxQty,
                     'unit_price' => $backboxPrice,
-                    'total_price' => $backboxPrice * $backboxQty * $quantity,
+                    'total_price' => $backboxPrice * $backboxQty,
                 ];
             }
         }
 
         // 4. 절곡품
+        // installation_type → guide_type 매핑 (calculateSteelItems는 guide_type 사용)
+        if (isset($inputs['installation_type']) && ! isset($inputs['guide_type'])) {
+            $inputs['guide_type'] = $this->normalizeGuideType($inputs['installation_type']);
+        }
         $steelItems = $this->calculateSteelItems($inputs);
         $items = array_merge($items, $steelItems);
 
diff --git a/app/Services/SlackNotificationService.php b/app/Services/SlackNotificationService.php
new file mode 100644
index 0000000..9faaa76
--- /dev/null
+++ b/app/Services/SlackNotificationService.php
@@ -0,0 +1,136 @@
+<?php
+
+namespace App\Services;
+
+use Illuminate\Support\Facades\Http;
+use Illuminate\Support\Facades\Log;
+
+class SlackNotificationService
+{
+    private ?string $webhookUrl;
+
+    private string $serverName;
+
+    private bool $enabled;
+
+    public function __construct()
+    {
+        $this->webhookUrl = env('SLACK_ALERT_WEBHOOK_URL') ?: env('LOG_SLACK_WEBHOOK_URL');
+        $this->serverName = env('SLACK_ALERT_SERVER_NAME', config('app.env', 'unknown'));
+        $this->enabled = (bool) env('SLACK_ALERT_ENABLED', false);
+    }
+
+    /**
+     * 일반 알림 전송
+     */
+    public function sendAlert(string $title, string $message, string $severity = 'critical'): void
+    {
+        $color = match ($severity) {
+            'critical' => '#FF0000',
+            'warning' => '#FFA500',
+            default => '#3498DB',
+        };
+
+        $emoji = match ($severity) {
+            'critical' => ':rotating_light:',
+            'warning' => ':warning:',
+            default => ':information_source:',
+        };
+
+        $this->send([
+            'attachments' => [
+                [
+                    'color' => $color,
+                    'blocks' => [
+                        [
+                            'type' => 'header',
+                            'text' => [
+                                'type' => 'plain_text',
+                                'text' => "{$emoji} {$title}",
+                                'emoji' => true,
+                            ],
+                        ],
+                        [
+                            'type' => 'section',
+                            'fields' => [
+                                [
+                                    'type' => 'mrkdwn',
+                                    'text' => "*서버:*\n{$this->serverName}",
+                                ],
+                                [
+                                    'type' => 'mrkdwn',
+                                    'text' => '*시간:*\n' . now()->format('Y-m-d H:i:s'),
+                                ],
+                            ],
+                        ],
+                        [
+                            'type' => 'section',
+                            'text' => [
+                                'type' => 'mrkdwn',
+                                'text' => "*상세:*\n{$message}",
+                            ],
+                        ],
+                        [
+                            'type' => 'context',
+                            'elements' => [
+                                [
+                                    'type' => 'mrkdwn',
+                                    'text' => "환경: `" . config('app.env') . "` | 심각도: `{$severity}`",
+                                ],
+                            ],
+                        ],
+                    ],
+                ],
+            ],
+        ]);
+    }
+
+    /**
+     * 백업 실패 알림
+     */
+    public function sendBackupAlert(string $title, string $message): void
+    {
+        $this->sendAlert("[SAM 백업 실패] {$title}", $message, 'critical');
+    }
+
+    /**
+     * 통계/모니터링 알림
+     */
+    public function sendStatAlert(string $title, string $message, string $domain): void
+    {
+        $this->sendAlert("[SAM {$domain}] {$title}", $message, 'critical');
+    }
+
+    /**
+     * Slack 웹훅으로 메시지 전송
+     */
+    private function send(array $payload): void
+    {
+        if (! $this->enabled) {
+            Log::debug('Slack 알림 비활성화 상태 (SLACK_ALERT_ENABLED=false)');
+
+            return;
+        }
+
+        if (empty($this->webhookUrl)) {
+            Log::warning('Slack 웹훅 URL 미설정');
+
+            return;
+        }
+
+        try {
+            $response = Http::timeout(10)->post($this->webhookUrl, $payload);
+
+            if (! $response->successful()) {
+                Log::error('Slack 알림 전송 실패', [
+                    'status' => $response->status(),
+                    'body' => $response->body(),
+                ]);
+            }
+        } catch (\Throwable $e) {
+            Log::error('Slack 알림 전송 예외', [
+                'error' => $e->getMessage(),
+            ]);
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/Services/Stats/StatMonitorService.php b/app/Services/Stats/StatMonitorService.php
index 292df47..044532f 100644
--- a/app/Services/Stats/StatMonitorService.php
+++ b/app/Services/Stats/StatMonitorService.php
@@ -3,6 +3,7 @@
 namespace App\Services\Stats;
 
 use App\Models\Stats\StatAlert;
+use App\Services\SlackNotificationService;
 use Illuminate\Support\Facades\Log;
 
 class StatMonitorService
@@ -26,6 +27,13 @@ public function recordAggregationFailure(int $tenantId, string $domain, string $
                 'is_resolved' => false,
                 'created_at' => now(),
             ]);
+
+            // critical 알림 Slack 전송
+            app(SlackNotificationService::class)->sendStatAlert(
+                "[{$jobType}] 집계 실패",
+                mb_substr($errorMessage, 0, 300),
+                $domain
+            );
         } catch (\Throwable $e) {
             Log::error('stat_alert 기록 실패', [
                 'tenant_id' => $tenantId,
@@ -94,6 +102,13 @@ public function recordMismatch(int $tenantId, string $domain, string $label, flo
                 'is_resolved' => false,
                 'created_at' => now(),
             ]);
+
+            // critical 알림 Slack 전송
+            app(SlackNotificationService::class)->sendStatAlert(
+                "[{$label}] 정합성 불일치",
+                "원본={$expected}, 통계={$actual}, 차이=" . ($actual - $expected),
+                $domain
+            );
         } catch (\Throwable $e) {
             Log::error('stat_alert 기록 실패 (mismatch)', [
                 'tenant_id' => $tenantId,
@@ -103,6 +118,33 @@ public function recordMismatch(int $tenantId, string $domain, string $label, flo
         }
     }
 
+    /**
+     * 백업 실패 알림 기록 (시스템 레벨, tenantId=0)
+     */
+    public function recordBackupFailure(string $title, string $message): void
+    {
+        try {
+            StatAlert::create([
+                'tenant_id' => 0,
+                'alert_type' => 'backup_failure',
+                'domain' => 'backup',
+                'severity' => 'critical',
+                'title' => $title,
+                'message' => mb_substr($message, 0, 500),
+                'current_value' => 0,
+                'threshold_value' => 0,
+                'is_read' => false,
+                'is_resolved' => false,
+                'created_at' => now(),
+            ]);
+        } catch (\Throwable $e) {
+            Log::error('stat_alert 기록 실패 (backup_failure)', [
+                'title' => $title,
+                'error' => $e->getMessage(),
+            ]);
+        }
+    }
+
     /**
      * 알림 해결 처리
      */
diff --git a/app/Swagger/v1/AppVersionApi.php b/app/Swagger/v1/AppVersionApi.php
new file mode 100644
index 0000000..8b5f797
--- /dev/null
+++ b/app/Swagger/v1/AppVersionApi.php
@@ -0,0 +1,126 @@
+<?php
+
+namespace App\Swagger\v1;
+
+/**
+ * @OA\Tag(name="App Version", description="앱 버전 관리 (인앱 업데이트)")
+ */
+
+/**
+ * App Version 관련 스키마 정의
+ * -----------------------------------------------------------------------------
+ */
+
+/**
+ * @OA\Schema(
+ *     schema="AppVersionLatest",
+ *     type="object",
+ *     description="최신 앱 버전 정보",
+ *
+ *     @OA\Property(property="id", type="integer", example=3),
+ *     @OA\Property(property="version_code", type="integer", example=2, description="정수 비교용 버전 코드"),
+ *     @OA\Property(property="version_name", type="string", example="0.2", description="표시용 버전명"),
+ *     @OA\Property(property="release_notes", type="string", nullable=true, example="- 알림음 채널 정리\n- 인앱 업데이트 추가", description="변경사항"),
+ *     @OA\Property(property="force_update", type="boolean", example=false, description="강제 업데이트 여부"),
+ *     @OA\Property(property="apk_size", type="integer", nullable=true, example=15728640, description="APK 파일 크기(bytes)"),
+ *     @OA\Property(property="download_url", type="string", example="https://api.codebridge-x.com/api/v1/app/download/3", description="APK 다운로드 URL"),
+ *     @OA\Property(property="published_at", type="string", format="date", nullable=true, example="2026-01-30", description="배포일")
+ * )
+ *
+ * @OA\Schema(
+ *     schema="AppVersionCheckResponse",
+ *     type="object",
+ *     description="버전 확인 응답",
+ *
+ *     @OA\Property(property="has_update", type="boolean", example=true, description="업데이트 존재 여부"),
+ *     @OA\Property(
+ *         property="latest_version",
+ *         nullable=true,
+ *         ref="#/components/schemas/AppVersionLatest",
+ *         description="최신 버전 정보 (has_update=false면 null)"
+ *     )
+ * )
+ */
+class AppVersionApi
+{
+    /**
+     * @OA\Get(
+     *     path="/api/v1/app/version",
+     *     tags={"App Version"},
+     *     summary="최신 버전 확인",
+     *     description="현재 앱 버전과 서버의 최신 버전을 비교하여 업데이트 필요 여부를 반환합니다. Bearer 토큰 불필요, API Key만 필요합니다.",
+     *     security={{"ApiKeyAuth": {}}},
+     *
+     *     @OA\Parameter(
+     *         name="platform",
+     *         in="query",
+     *         required=false,
+     *         description="플랫폼 (기본값: android)",
+     *
+     *         @OA\Schema(type="string", enum={"android", "ios"}, example="android")
+     *     ),
+     *
+     *     @OA\Parameter(
+     *         name="current_version_code",
+     *         in="query",
+     *         required=true,
+     *         description="현재 앱의 버전 코드 (정수)",
+     *
+     *         @OA\Schema(type="integer", example=1)
+     *     ),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="버전 확인 성공",
+     *
+     *         @OA\JsonContent(
+     *             allOf={
+     *
+     *                 @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *                 @OA\Schema(
+     *
+     *                     @OA\Property(property="data", ref="#/components/schemas/AppVersionCheckResponse")
+     *                 )
+     *             }
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=401, description="API Key 인증 실패", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function latestVersion() {}
+
+    /**
+     * @OA\Get(
+     *     path="/api/v1/app/download/{id}",
+     *     tags={"App Version"},
+     *     summary="APK 다운로드",
+     *     description="지정된 버전의 APK 파일을 다운로드합니다. 다운로드 카운트가 자동으로 증가합니다. Bearer 토큰 불필요, API Key만 필요합니다.",
+     *     security={{"ApiKeyAuth": {}}},
+     *
+     *     @OA\Parameter(
+     *         name="id",
+     *         in="path",
+     *         required=true,
+     *         description="앱 버전 ID",
+     *
+     *         @OA\Schema(type="integer", example=3)
+     *     ),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="APK 파일 다운로드",
+     *
+     *         @OA\MediaType(
+     *             mediaType="application/vnd.android.package-archive",
+     *
+     *             @OA\Schema(type="string", format="binary")
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=404, description="APK 파일을 찾을 수 없음", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=401, description="API Key 인증 실패", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function download() {}
+}
diff --git a/app/Swagger/v1/DocumentApi.php b/app/Swagger/v1/DocumentApi.php
index fa6383c..5c47d30 100644
--- a/app/Swagger/v1/DocumentApi.php
+++ b/app/Swagger/v1/DocumentApi.php
@@ -334,4 +334,151 @@ public function update() {}
      * )
      */
     public function destroy() {}
+
+    // =========================================================================
+    // 결재 워크플로우
+    // =========================================================================
+
+    /**
+     * @OA\Post(
+     *     path="/api/v1/documents/{id}/submit",
+     *     tags={"Documents"},
+     *     summary="결재 제출",
+     *     description="DRAFT 또는 REJECTED 상태의 문서를 결재 요청합니다 (PENDING 상태로 변경).",
+     *     security={{"ApiKeyAuth":{}},{"BearerAuth":{}}},
+     *
+     *     @OA\Parameter(name="id", in="path", required=true, description="문서 ID", @OA\Schema(type="integer")),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="결재 제출 성공",
+     *
+     *         @OA\JsonContent(
+     *             allOf={
+     *
+     *                 @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *                 @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/Document"))
+     *             }
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=400, description="잘못된 요청 (제출 불가 상태 또는 결재선 미설정)", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=401, description="인증 실패", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=404, description="문서를 찾을 수 없음", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=500, description="서버 에러", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function submit() {}
+
+    /**
+     * @OA\Post(
+     *     path="/api/v1/documents/{id}/approve",
+     *     tags={"Documents"},
+     *     summary="결재 승인",
+     *     description="현재 사용자의 결재 단계를 승인합니다. 모든 단계 완료 시 문서가 APPROVED 상태로 변경됩니다.",
+     *     security={{"ApiKeyAuth":{}},{"BearerAuth":{}}},
+     *
+     *     @OA\Parameter(name="id", in="path", required=true, description="문서 ID", @OA\Schema(type="integer")),
+     *
+     *     @OA\RequestBody(
+     *         required=false,
+     *
+     *         @OA\JsonContent(
+     *
+     *             @OA\Property(property="comment", type="string", example="승인합니다.", nullable=true, description="결재 의견")
+     *         )
+     *     ),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="승인 성공",
+     *
+     *         @OA\JsonContent(
+     *             allOf={
+     *
+     *                 @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *                 @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/Document"))
+     *             }
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=400, description="잘못된 요청 (승인 불가 상태 또는 차례 아님)", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=401, description="인증 실패", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=404, description="문서를 찾을 수 없음", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=500, description="서버 에러", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function approve() {}
+
+    /**
+     * @OA\Post(
+     *     path="/api/v1/documents/{id}/reject",
+     *     tags={"Documents"},
+     *     summary="결재 반려",
+     *     description="현재 사용자의 결재 단계를 반려합니다. 문서가 REJECTED 상태로 변경됩니다.",
+     *     security={{"ApiKeyAuth":{}},{"BearerAuth":{}}},
+     *
+     *     @OA\Parameter(name="id", in="path", required=true, description="문서 ID", @OA\Schema(type="integer")),
+     *
+     *     @OA\RequestBody(
+     *         required=true,
+     *
+     *         @OA\JsonContent(
+     *             required={"comment"},
+     *
+     *             @OA\Property(property="comment", type="string", example="검사 기준 미달로 반려합니다.", description="반려 사유 (필수)")
+     *         )
+     *     ),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="반려 성공",
+     *
+     *         @OA\JsonContent(
+     *             allOf={
+     *
+     *                 @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *                 @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/Document"))
+     *             }
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=400, description="잘못된 요청 (반려 불가 상태 또는 차례 아님)", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=401, description="인증 실패", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=404, description="문서를 찾을 수 없음", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=500, description="서버 에러", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function reject() {}
+
+    /**
+     * @OA\Post(
+     *     path="/api/v1/documents/{id}/cancel",
+     *     tags={"Documents"},
+     *     summary="결재 취소/회수",
+     *     description="작성자만 DRAFT 또는 PENDING 상태의 문서를 취소할 수 있습니다. CANCELLED 상태로 변경됩니다.",
+     *     security={{"ApiKeyAuth":{}},{"BearerAuth":{}}},
+     *
+     *     @OA\Parameter(name="id", in="path", required=true, description="문서 ID", @OA\Schema(type="integer")),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="취소 성공",
+     *
+     *         @OA\JsonContent(
+     *             allOf={
+     *
+     *                 @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *                 @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/Document"))
+     *             }
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=400, description="잘못된 요청 (취소 불가 상태 또는 작성자 아님)", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=401, description="인증 실패", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=404, description="문서를 찾을 수 없음", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=500, description="서버 에러", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function cancel() {}
 }
diff --git a/app/Swagger/v1/DocumentTemplateApi.php b/app/Swagger/v1/DocumentTemplateApi.php
new file mode 100644
index 0000000..2471ab0
--- /dev/null
+++ b/app/Swagger/v1/DocumentTemplateApi.php
@@ -0,0 +1,194 @@
+<?php
+
+namespace App\Swagger\v1;
+
+/**
+ * @OA\Tag(name="DocumentTemplates", description="문서 양식(템플릿) 관리")
+ *
+ * @OA\Schema(
+ *     schema="DocumentTemplate",
+ *     type="object",
+ *     description="문서 양식 정보",
+ *
+ *     @OA\Property(property="id", type="integer", example=1, description="양식 ID"),
+ *     @OA\Property(property="tenant_id", type="integer", example=1, description="테넌트 ID"),
+ *     @OA\Property(property="name", type="string", example="수입검사 성적서 (EGI)", description="양식명"),
+ *     @OA\Property(property="category", type="string", example="품질", description="분류"),
+ *     @OA\Property(property="title", type="string", example="수입검사 성적서", nullable=true, description="문서 제목"),
+ *     @OA\Property(property="company_name", type="string", example="(주)SAM", nullable=true, description="회사명"),
+ *     @OA\Property(property="company_address", type="string", nullable=true, description="회사 주소"),
+ *     @OA\Property(property="company_contact", type="string", nullable=true, description="연락처"),
+ *     @OA\Property(property="footer_remark_label", type="string", example="부적합 내용", description="하단 비고 라벨"),
+ *     @OA\Property(property="footer_judgement_label", type="string", example="종합판정", description="하단 판정 라벨"),
+ *     @OA\Property(property="footer_judgement_options", type="array", nullable=true, description="판정 옵션",
+ *         @OA\Items(type="string", example="적합")
+ *     ),
+ *     @OA\Property(property="is_active", type="boolean", example=true, description="활성 여부"),
+ *     @OA\Property(property="approval_lines", type="array", description="결재라인",
+ *         @OA\Items(ref="#/components/schemas/DocumentTemplateApprovalLine")
+ *     ),
+ *     @OA\Property(property="basic_fields", type="array", description="기본 필드",
+ *         @OA\Items(ref="#/components/schemas/DocumentTemplateBasicField")
+ *     ),
+ *     @OA\Property(property="sections", type="array", description="검사 기준서 섹션",
+ *         @OA\Items(ref="#/components/schemas/DocumentTemplateSection")
+ *     ),
+ *     @OA\Property(property="columns", type="array", description="테이블 컬럼",
+ *         @OA\Items(ref="#/components/schemas/DocumentTemplateColumn")
+ *     ),
+ *     @OA\Property(property="created_at", type="string", format="date-time", example="2026-01-28T09:00:00Z"),
+ *     @OA\Property(property="updated_at", type="string", format="date-time", example="2026-01-28T09:00:00Z")
+ * )
+ *
+ * @OA\Schema(
+ *     schema="DocumentTemplateApprovalLine",
+ *     type="object",
+ *     description="양식 결재라인",
+ *
+ *     @OA\Property(property="id", type="integer", example=1),
+ *     @OA\Property(property="template_id", type="integer", example=1),
+ *     @OA\Property(property="name", type="string", example="작성", description="결재자 이름/직책"),
+ *     @OA\Property(property="dept", type="string", example="품질", nullable=true, description="부서"),
+ *     @OA\Property(property="role", type="string", example="작성", description="역할"),
+ *     @OA\Property(property="sort_order", type="integer", example=1, description="정렬 순서")
+ * )
+ *
+ * @OA\Schema(
+ *     schema="DocumentTemplateBasicField",
+ *     type="object",
+ *     description="양식 기본 필드",
+ *
+ *     @OA\Property(property="id", type="integer", example=1),
+ *     @OA\Property(property="template_id", type="integer", example=1),
+ *     @OA\Property(property="label", type="string", example="품명", description="필드 라벨"),
+ *     @OA\Property(property="field_type", type="string", example="text", description="필드 타입"),
+ *     @OA\Property(property="default_value", type="string", example="", nullable=true, description="기본값"),
+ *     @OA\Property(property="sort_order", type="integer", example=1, description="정렬 순서")
+ * )
+ *
+ * @OA\Schema(
+ *     schema="DocumentTemplateSection",
+ *     type="object",
+ *     description="양식 검사 기준서 섹션",
+ *
+ *     @OA\Property(property="id", type="integer", example=1),
+ *     @OA\Property(property="template_id", type="integer", example=1),
+ *     @OA\Property(property="title", type="string", example="검사항목", description="섹션 제목"),
+ *     @OA\Property(property="image_path", type="string", example="/img/inspection/screen_inspection.jpg", nullable=true, description="검사 기준 이미지"),
+ *     @OA\Property(property="sort_order", type="integer", example=1, description="정렬 순서"),
+ *     @OA\Property(property="items", type="array", description="검사항목",
+ *         @OA\Items(ref="#/components/schemas/DocumentTemplateSectionItem")
+ *     )
+ * )
+ *
+ * @OA\Schema(
+ *     schema="DocumentTemplateSectionItem",
+ *     type="object",
+ *     description="양식 검사항목",
+ *
+ *     @OA\Property(property="id", type="integer", example=1),
+ *     @OA\Property(property="section_id", type="integer", example=1),
+ *     @OA\Property(property="category", type="string", example="외관", nullable=true, description="항목 분류"),
+ *     @OA\Property(property="item", type="string", example="표면 스크래치", description="검사항목"),
+ *     @OA\Property(property="standard", type="string", example="스크래치 없을 것", nullable=true, description="검사기준"),
+ *     @OA\Property(property="method", type="string", example="육안검사", nullable=true, description="검사방식"),
+ *     @OA\Property(property="frequency", type="string", example="전수", nullable=true, description="검사주기"),
+ *     @OA\Property(property="regulation", type="string", nullable=true, description="관련 규격"),
+ *     @OA\Property(property="sort_order", type="integer", example=1, description="정렬 순서")
+ * )
+ *
+ * @OA\Schema(
+ *     schema="DocumentTemplateColumn",
+ *     type="object",
+ *     description="양식 테이블 컬럼",
+ *
+ *     @OA\Property(property="id", type="integer", example=1),
+ *     @OA\Property(property="template_id", type="integer", example=1),
+ *     @OA\Property(property="label", type="string", example="1차", description="컬럼 라벨"),
+ *     @OA\Property(property="width", type="string", example="80px", nullable=true, description="컬럼 너비"),
+ *     @OA\Property(property="column_type", type="string", example="check", enum={"text","check","complex","select","measurement"}, description="컬럼 타입"),
+ *     @OA\Property(property="group_name", type="string", example="측정치", nullable=true, description="그룹명"),
+ *     @OA\Property(property="sub_labels", type="array", nullable=true, description="하위 라벨 (complex 타입)",
+ *         @OA\Items(type="string", example="n1")
+ *     ),
+ *     @OA\Property(property="sort_order", type="integer", example=1, description="정렬 순서")
+ * )
+ */
+class DocumentTemplateApi
+{
+    /**
+     * @OA\Get(
+     *     path="/api/v1/document-templates",
+     *     tags={"DocumentTemplates"},
+     *     summary="양식 목록 조회",
+     *     description="문서 양식(템플릿) 목록을 조회합니다. 결재라인과 기본필드를 포함합니다.",
+     *     security={{"ApiKeyAuth":{}},{"BearerAuth":{}}},
+     *
+     *     @OA\Parameter(name="is_active", in="query", description="활성 상태 필터", @OA\Schema(type="boolean")),
+     *     @OA\Parameter(name="category", in="query", description="카테고리 필터", @OA\Schema(type="string", example="품질")),
+     *     @OA\Parameter(name="search", in="query", description="검색어 (양식명, 제목)", @OA\Schema(type="string")),
+     *     @OA\Parameter(name="sort_by", in="query", description="정렬 기준", @OA\Schema(type="string", enum={"created_at","name","category"}, default="created_at")),
+     *     @OA\Parameter(name="sort_dir", in="query", description="정렬 방향", @OA\Schema(type="string", enum={"asc","desc"}, default="desc")),
+     *     @OA\Parameter(ref="#/components/parameters/Page"),
+     *     @OA\Parameter(ref="#/components/parameters/Size"),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="조회 성공",
+     *
+     *         @OA\JsonContent(
+     *             allOf={
+     *
+     *                 @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *                 @OA\Schema(
+     *
+     *                     @OA\Property(
+     *                         property="data",
+     *                         type="object",
+     *                         @OA\Property(property="current_page", type="integer", example=1),
+     *                         @OA\Property(property="data", type="array", @OA\Items(ref="#/components/schemas/DocumentTemplate")),
+     *                         @OA\Property(property="per_page", type="integer", example=20),
+     *                         @OA\Property(property="total", type="integer", example=10)
+     *                     )
+     *                 )
+     *             }
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=400, description="잘못된 요청", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=401, description="인증 실패", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=500, description="서버 에러", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function index() {}
+
+    /**
+     * @OA\Get(
+     *     path="/api/v1/document-templates/{id}",
+     *     tags={"DocumentTemplates"},
+     *     summary="양식 상세 조회",
+     *     description="ID 기준 양식 상세 정보를 조회합니다. 결재라인, 기본필드, 섹션(검사항목 포함), 컬럼 전체를 반환합니다.",
+     *     security={{"ApiKeyAuth":{}},{"BearerAuth":{}}},
+     *
+     *     @OA\Parameter(name="id", in="path", required=true, description="양식 ID", @OA\Schema(type="integer", example=7)),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="조회 성공",
+     *
+     *         @OA\JsonContent(
+     *             allOf={
+     *
+     *                 @OA\Schema(ref="#/components/schemas/ApiResponse"),
+     *                 @OA\Schema(@OA\Property(property="data", ref="#/components/schemas/DocumentTemplate"))
+     *             }
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=401, description="인증 실패", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=404, description="양식을 찾을 수 없음", @OA\JsonContent(ref="#/components/schemas/ErrorResponse")),
+     *     @OA\Response(response=500, description="서버 에러", @OA\JsonContent(ref="#/components/schemas/ErrorResponse"))
+     * )
+     */
+    public function show() {}
+}
\ No newline at end of file
diff --git a/config/filesystems.php b/config/filesystems.php
index cbdf6e2..199fd26 100644
--- a/config/filesystems.php
+++ b/config/filesystems.php
@@ -55,6 +55,14 @@
             'report' => false,
         ],
 
+        'app_releases' => [
+            'driver' => 'local',
+            'root' => storage_path('app/releases'),
+            'visibility' => 'private',
+            'throw' => false,
+            'report' => false,
+        ],
+
         's3' => [
             'driver' => 's3',
             'key' => env('AWS_ACCESS_KEY_ID'),
diff --git a/database/migrations/2026_01_30_200000_create_app_versions_table.php b/database/migrations/2026_01_30_200000_create_app_versions_table.php
new file mode 100644
index 0000000..7c718cb
--- /dev/null
+++ b/database/migrations/2026_01_30_200000_create_app_versions_table.php
@@ -0,0 +1,37 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('app_versions', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedInteger('version_code')->unique()->comment('정수 비교용 버전 코드');
+            $table->string('version_name', 20)->comment('표시용 버전명 (예: 0.2)');
+            $table->string('platform', 10)->default('android')->comment('android/ios');
+            $table->text('release_notes')->nullable()->comment('변경사항');
+            $table->string('apk_path', 500)->nullable()->comment('스토리지 경로');
+            $table->unsignedBigInteger('apk_size')->nullable()->comment('파일 크기(bytes)');
+            $table->string('apk_original_name', 255)->nullable()->comment('원본 파일명');
+            $table->boolean('force_update')->default(false)->comment('강제 업데이트 여부');
+            $table->boolean('is_active')->default(true)->comment('활성 여부');
+            $table->unsignedInteger('download_count')->default(0)->comment('다운로드 수');
+            $table->timestamp('published_at')->nullable()->comment('배포일');
+            $table->unsignedBigInteger('created_by')->nullable()->comment('생성자');
+            $table->unsignedBigInteger('updated_by')->nullable()->comment('수정자');
+            $table->timestamps();
+            $table->softDeletes();
+
+            $table->index(['platform', 'is_active']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('app_versions');
+    }
+};
diff --git a/routes/api.php b/routes/api.php
index daf53ea..c7a3f3e 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -38,6 +38,7 @@
     require __DIR__.'/api/v1/documents.php';
     require __DIR__.'/api/v1/common.php';
     require __DIR__.'/api/v1/stats.php';
+    require __DIR__.'/api/v1/app.php';
 
     // 공유 링크 다운로드 (인증 불필요 - auth.apikey 그룹 밖)
     Route::get('/files/share/{token}', [FileStorageController::class, 'downloadShared'])->name('v1.files.share.download');
diff --git a/routes/api/v1/app.php b/routes/api/v1/app.php
new file mode 100644
index 0000000..414cb8b
--- /dev/null
+++ b/routes/api/v1/app.php
@@ -0,0 +1,16 @@
+<?php
+
+use App\Http\Controllers\Api\V1\AppVersionController;
+use Illuminate\Support\Facades\Route;
+
+/*
+|--------------------------------------------------------------------------
+| App Version Routes (앱 버전 관리)
+|--------------------------------------------------------------------------
+| 인앱 업데이트용 API (Bearer 토큰 불필요, API Key만 필요)
+*/
+
+Route::prefix('app')->group(function () {
+    Route::get('/version', [AppVersionController::class, 'latestVersion']);
+    Route::get('/download/{id}', [AppVersionController::class, 'download']);
+});
diff --git a/routes/api/v1/documents.php b/routes/api/v1/documents.php
index ff1de56..f28f438 100644
--- a/routes/api/v1/documents.php
+++ b/routes/api/v1/documents.php
@@ -3,13 +3,22 @@
 /**
  * 문서 관리 API 라우트 (v1)
  *
+ * - 문서 양식(템플릿) 조회
  * - 문서 CRUD
- * - 결재 워크플로우 (보류 - 기존 시스템 연동 필요)
+ * - 결재 워크플로우
  */
 
 use App\Http\Controllers\Api\V1\Documents\DocumentController;
+use App\Http\Controllers\Api\V1\Documents\DocumentTemplateController;
 use Illuminate\Support\Facades\Route;
 
+// 문서 양식(템플릿) - 읽기 전용
+Route::prefix('document-templates')->group(function () {
+    Route::get('/', [DocumentTemplateController::class, 'index'])->name('v1.document-templates.index');
+    Route::get('/{id}', [DocumentTemplateController::class, 'show'])->whereNumber('id')->name('v1.document-templates.show');
+});
+
+// 문서 CRUD + 결재
 Route::prefix('documents')->group(function () {
     // 문서 CRUD
     Route::get('/', [DocumentController::class, 'index'])->name('v1.documents.index');
@@ -18,9 +27,9 @@
     Route::patch('/{id}', [DocumentController::class, 'update'])->whereNumber('id')->name('v1.documents.update');
     Route::delete('/{id}', [DocumentController::class, 'destroy'])->whereNumber('id')->name('v1.documents.destroy');
 
-    // 결재 워크플로우 (보류 - 기존 시스템 연동 필요)
-    // Route::post('/{id}/submit', [DocumentController::class, 'submit'])->name('v1.documents.submit');
-    // Route::post('/{id}/approve', [DocumentController::class, 'approve'])->name('v1.documents.approve');
-    // Route::post('/{id}/reject', [DocumentController::class, 'reject'])->name('v1.documents.reject');
-    // Route::post('/{id}/cancel', [DocumentController::class, 'cancel'])->name('v1.documents.cancel');
-});
+    // 결재 워크플로우
+    Route::post('/{id}/submit', [DocumentController::class, 'submit'])->whereNumber('id')->name('v1.documents.submit');
+    Route::post('/{id}/approve', [DocumentController::class, 'approve'])->whereNumber('id')->name('v1.documents.approve');
+    Route::post('/{id}/reject', [DocumentController::class, 'reject'])->whereNumber('id')->name('v1.documents.reject');
+    Route::post('/{id}/cancel', [DocumentController::class, 'cancel'])->whereNumber('id')->name('v1.documents.cancel');
+});
\ No newline at end of file
diff --git a/routes/console.php b/routes/console.php
index 190c612..e749df0 100644
--- a/routes/console.php
+++ b/routes/console.php
@@ -120,6 +120,19 @@
         \Illuminate\Support\Facades\Log::error('❌ stat:aggregate-monthly 스케줄러 실행 실패', ['time' => now()]);
     });
 
+// ─── DB 백업 모니터링 ───
+
+// 매일 새벽 05:00에 DB 백업 상태 확인 (04:30 백업 완료 후 점검)
+Schedule::command('db:backup-check')
+    ->dailyAt('05:00')
+    ->appendOutputTo(storage_path('logs/scheduler.log'))
+    ->onSuccess(function () {
+        \Illuminate\Support\Facades\Log::info('✅ db:backup-check 스케줄러 실행 성공', ['time' => now()]);
+    })
+    ->onFailure(function () {
+        \Illuminate\Support\Facades\Log::error('❌ db:backup-check 스케줄러 실행 실패', ['time' => now()]);
+    });
+
 // 매일 오전 09:00에 KPI 목표 대비 알림 체크
 Schedule::command('stat:check-kpi-alerts')
     ->dailyAt('09:00')
diff --git a/scripts/backup/backup.conf.example b/scripts/backup/backup.conf.example
new file mode 100644
index 0000000..d665c10
--- /dev/null
+++ b/scripts/backup/backup.conf.example
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+# =============================================================================
+# SAM DB Backup Configuration
+# =============================================================================
+# 사용법: 이 파일을 backup.conf로 복사 후 환경에 맞게 수정
+#   cp backup.conf.example backup.conf
+#   chmod 600 backup.conf
+# =============================================================================
+
+# DB 접속 정보
+DB_HOST=127.0.0.1
+DB_PORT=3306
+DB_USER=codebridge
+DB_PASS="code**bridge"
+
+# 백업 대상 DB (공백 구분)
+DATABASES="sam sam_stat"
+
+# 백업 저장 경로
+BACKUP_BASE_DIR=/data/backup/mysql
+
+# 보관 정책
+DAILY_RETENTION_DAYS=7
+WEEKLY_RETENTION_DAYS=28
+
+# 로그
+LOG_FILE=/data/backup/mysql/logs/backup.log
+
+# 상태 파일 (Laravel 모니터링용)
+STATUS_FILE=/data/backup/mysql/.backup_status
+
+# 최소 백업 파일 크기 (bytes) — 이보다 작으면 실패로 간주
+MIN_SIZE_SAM=1048576       # 1MB
+MIN_SIZE_SAM_STAT=102400   # 100KB
\ No newline at end of file
diff --git a/scripts/backup/sam-db-backup.sh b/scripts/backup/sam-db-backup.sh
new file mode 100755
index 0000000..893e2de
--- /dev/null
+++ b/scripts/backup/sam-db-backup.sh
@@ -0,0 +1,190 @@
+#!/usr/bin/env bash
+# =============================================================================
+# SAM DB Backup Script
+# =============================================================================
+# 용도: MySQL 데이터베이스 백업 (mysqldump + gzip)
+# 실행: crontab에서 매일 04:30 실행
+#   30 4 * * * /home/webservice/api/scripts/backup/sam-db-backup.sh
+# =============================================================================
+
+set -euo pipefail
+
+# 스크립트 경로 기준으로 설정 파일 로드
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+CONF_FILE="${SCRIPT_DIR}/backup.conf"
+
+if [[ ! -f "$CONF_FILE" ]]; then
+    echo "[FATAL] 설정 파일 없음: $CONF_FILE" >&2
+    exit 1
+fi
+
+# shellcheck source=backup.conf.example
+source "$CONF_FILE"
+
+# =============================================================================
+# 변수 초기화
+# =============================================================================
+TODAY=$(date +%Y-%m-%d)
+TIMESTAMP=$(date +%Y%m%d_%H%M)
+DAY_OF_WEEK=$(date +%u)  # 1=월 ~ 7=일
+DAILY_DIR="${BACKUP_BASE_DIR}/daily/${TODAY}"
+WEEKLY_DIR="${BACKUP_BASE_DIR}/weekly"
+LOG_DIR=$(dirname "$LOG_FILE")
+ERRORS=()
+DB_RESULTS=()
+
+# =============================================================================
+# 함수 정의
+# =============================================================================
+
+log() {
+    local level="$1"
+    shift
+    echo "[$(date '+%Y-%m-%d %H:%M:%S')] [$level] $*" | tee -a "$LOG_FILE"
+}
+
+ensure_dirs() {
+    mkdir -p "$DAILY_DIR" "$WEEKLY_DIR" "$LOG_DIR"
+}
+
+backup_database() {
+    local db_name="$1"
+    local output_file="${DAILY_DIR}/${db_name}_${TIMESTAMP}.sql.gz"
+
+    log "INFO" "백업 시작: ${db_name}"
+
+    if mysqldump \
+        --host="$DB_HOST" \
+        --port="$DB_PORT" \
+        --user="$DB_USER" \
+        --password="$DB_PASS" \
+        --single-transaction \
+        --routines \
+        --triggers \
+        --quick \
+        --lock-tables=false \
+        "$db_name" 2>>"$LOG_FILE" | gzip > "$output_file"; then
+
+        local file_size
+        file_size=$(stat -f%z "$output_file" 2>/dev/null || stat -c%s "$output_file" 2>/dev/null || echo 0)
+
+        # 최소 크기 검증
+        local min_size_var="MIN_SIZE_$(echo "$db_name" | tr '[:lower:]' '[:upper:]')"
+        local min_size="${!min_size_var:-0}"
+
+        if [[ "$file_size" -lt "$min_size" ]]; then
+            log "ERROR" "백업 파일 크기 부족: ${db_name} (${file_size} bytes < ${min_size} bytes)"
+            ERRORS+=("${db_name}: 파일 크기 부족 (${file_size} < ${min_size})")
+            DB_RESULTS+=("{\"db\":\"${db_name}\",\"file\":\"$(basename "$output_file")\",\"size_bytes\":${file_size},\"status\":\"size_error\"}")
+            return 1
+        fi
+
+        log "INFO" "백업 완료: ${db_name} (${file_size} bytes)"
+        DB_RESULTS+=("{\"db\":\"${db_name}\",\"file\":\"$(basename "$output_file")\",\"size_bytes\":${file_size},\"status\":\"success\"}")
+
+        # 일요일이면 weekly 복사
+        if [[ "$DAY_OF_WEEK" -eq 7 ]]; then
+            local weekly_file="${WEEKLY_DIR}/${db_name}_${TIMESTAMP}_week.sql.gz"
+            cp "$output_file" "$weekly_file"
+            log "INFO" "주간 백업 복사: ${db_name}"
+        fi
+
+        return 0
+    else
+        log "ERROR" "mysqldump 실패: ${db_name}"
+        ERRORS+=("${db_name}: mysqldump 실패")
+        DB_RESULTS+=("{\"db\":\"${db_name}\",\"file\":\"\",\"size_bytes\":0,\"status\":\"dump_error\"}")
+        rm -f "$output_file"
+        return 1
+    fi
+}
+
+cleanup_old_backups() {
+    log "INFO" "오래된 백업 정리 시작"
+
+    # daily: DAILY_RETENTION_DAYS일 초과 디렉토리 삭제
+    if [[ -d "${BACKUP_BASE_DIR}/daily" ]]; then
+        find "${BACKUP_BASE_DIR}/daily" -mindepth 1 -maxdepth 1 -type d -mtime +"$DAILY_RETENTION_DAYS" -exec rm -rf {} \; 2>>"$LOG_FILE"
+        local daily_deleted=$?
+        log "INFO" "일간 백업 정리 완료 (${DAILY_RETENTION_DAYS}일 초과 삭제)"
+    fi
+
+    # weekly: WEEKLY_RETENTION_DAYS일 초과 파일 삭제
+    if [[ -d "$WEEKLY_DIR" ]]; then
+        find "$WEEKLY_DIR" -type f -name "*.sql.gz" -mtime +"$WEEKLY_RETENTION_DAYS" -delete 2>>"$LOG_FILE"
+        log "INFO" "주간 백업 정리 완료 (${WEEKLY_RETENTION_DAYS}일 초과 삭제)"
+    fi
+}
+
+write_status_file() {
+    local status="success"
+    local errors_json="[]"
+
+    if [[ ${#ERRORS[@]} -gt 0 ]]; then
+        status="failure"
+        # 에러 배열을 JSON 배열로 변환
+        errors_json="["
+        for i in "${!ERRORS[@]}"; do
+            [[ $i -gt 0 ]] && errors_json+=","
+            errors_json+="\"${ERRORS[$i]}\""
+        done
+        errors_json+="]"
+    fi
+
+    # databases 객체 구성
+    local databases_json="{"
+    for i in "${!DB_RESULTS[@]}"; do
+        [[ $i -gt 0 ]] && databases_json+=","
+        local result="${DB_RESULTS[$i]}"
+        local db_name
+        db_name=$(echo "$result" | sed 's/.*"db":"\([^"]*\)".*/\1/')
+        local file_name
+        file_name=$(echo "$result" | sed 's/.*"file":"\([^"]*\)".*/\1/')
+        local size
+        size=$(echo "$result" | sed 's/.*"size_bytes":\([0-9]*\).*/\1/')
+        databases_json+="\"${db_name}\":{\"file\":\"${file_name}\",\"size_bytes\":${size}}"
+    done
+    databases_json+="}"
+
+    cat > "$STATUS_FILE" <<EOF
+{
+  "last_run": "$(date '+%Y-%m-%dT%H:%M:%S%z' | sed 's/\(..\)$/:\1/')",
+  "status": "${status}",
+  "databases": ${databases_json},
+  "errors": ${errors_json}
+}
+EOF
+
+    log "INFO" "상태 파일 기록: ${status}"
+}
+
+# =============================================================================
+# 메인 실행
+# =============================================================================
+
+main() {
+    log "INFO" "========== SAM DB 백업 시작 =========="
+
+    ensure_dirs
+
+    local has_error=0
+
+    for db in $DATABASES; do
+        if ! backup_database "$db"; then
+            has_error=1
+        fi
+    done
+
+    cleanup_old_backups
+    write_status_file
+
+    if [[ $has_error -eq 1 ]]; then
+        log "ERROR" "========== SAM DB 백업 완료 (일부 실패) =========="
+        exit 1
+    else
+        log "INFO" "========== SAM DB 백업 완료 (성공) =========="
+        exit 0
+    fi
+}
+
+main "$@"
\ No newline at end of file