feat: 입찰(Bidding) 관리 기능 구현

- Bidding 모델, 서비스, 컨트롤러, FormRequest 추가
- 마이그레이션 및 시더 추가
- Swagger API 문서 추가
- 견적에서 입찰 전환 시 중복 체크 로직 추가
- per_page 파라미터 100 초과 시 자동 클램핑 처리
- error.bidding.already_registered 에러 메시지 추가

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

@@ -0,0 +1,81 @@
+<?php
+
+namespace App\Http\Controllers\Api\v1;
+
+use App\Helpers\ApiResponse;
+use App\Http\Controllers\Controller;
+use App\Http\Requests\Bidding\BiddingFilterRequest;
+use App\Http\Requests\Bidding\BiddingStatusRequest;
+use App\Http\Requests\Bidding\BiddingStoreRequest;
+use App\Http\Requests\Bidding\BiddingUpdateRequest;
+use App\Http\Requests\Bidding\BulkDeleteRequest;
+use App\Services\Bidding\BiddingService;
+
+class BiddingController extends Controller
+{
+    public function __construct(private BiddingService $service) {}
+
+    /**
+     * 입찰 목록 조회
+     */
+    public function index(BiddingFilterRequest $request)
+    {
+        return ApiResponse::handle(fn () => $this->service->index($request->validated()));
+    }
+
+    /**
+     * 입찰 통계 조회
+     */
+    public function stats()
+    {
+        return ApiResponse::handle(fn () => $this->service->stats());
+    }
+
+    /**
+     * 입찰 생성 (견적에서 전환 포함)
+     */
+    public function store(BiddingStoreRequest $request)
+    {
+        return ApiResponse::handle(fn () => $this->service->store($request->validated()), 'message.created');
+    }
+
+    /**
+     * 입찰 단건 조회
+     */
+    public function show(int $id)
+    {
+        return ApiResponse::handle(fn () => $this->service->show($id));
+    }
+
+    /**
+     * 입찰 수정
+     */
+    public function update(BiddingUpdateRequest $request, int $id)
+    {
+        return ApiResponse::handle(fn () => $this->service->update($id, $request->validated()), 'message.updated');
+    }
+
+    /**
+     * 입찰 삭제
+     */
+    public function destroy(int $id)
+    {
+        return ApiResponse::handle(fn () => $this->service->destroy($id), 'message.deleted');
+    }
+
+    /**
+     * 입찰 일괄 삭제
+     */
+    public function bulkDestroy(BulkDeleteRequest $request)
+    {
+        return ApiResponse::handle(fn () => $this->service->bulkDestroy($request->validated()['ids']), 'message.deleted');
+    }
+
+    /**
+     * 입찰 상태 변경
+     */
+    public function updateStatus(BiddingStatusRequest $request, int $id)
+    {
+        return ApiResponse::handle(fn () => $this->service->updateStatus($id, $request->validated()['status']), 'message.updated');
+    }
+}

app/Http/Requests/Bidding/BiddingFilterRequest.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Http\Requests\Bidding;
+
+use App\Models\Bidding\Bidding;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class BiddingFilterRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'status' => ['nullable', 'string', Rule::in(Bidding::STATUSES)],
+            'from_date' => ['nullable', 'date'],
+            'to_date' => ['nullable', 'date', 'after_or_equal:from_date'],
+            'search' => ['nullable', 'string', 'max:100'],
+            'sort_by' => ['nullable', 'string', Rule::in(['bidding_date', 'bidding_code', 'client_name', 'project_name', 'bidding_amount', 'status', 'created_at'])],
+            'sort_dir' => ['nullable', 'string', Rule::in(['asc', 'desc'])],
+            'per_page' => ['nullable', 'integer', 'min:1'],
+        ];
+    }
+
+    public function messages(): array
+    {
+        return [
+            'status.in' => __('validation.in', ['attribute' => __('validation.attributes.status')]),
+            'to_date.after_or_equal' => __('validation.after_or_equal', ['attribute' => __('validation.attributes.to_date'), 'date' => __('validation.attributes.from_date')]),
+        ];
+    }
+}

app/Http/Requests/Bidding/BiddingStatusRequest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Requests\Bidding;
+
+use App\Models\Bidding\Bidding;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class BiddingStatusRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'status' => ['required', 'string', Rule::in(Bidding::STATUSES)],
+        ];
+    }
+
+    public function messages(): array
+    {
+        return [
+            'status.required' => __('validation.required', ['attribute' => __('validation.attributes.status')]),
+            'status.in' => __('validation.in', ['attribute' => __('validation.attributes.status')]),
+        ];
+    }
+}

app/Http/Requests/Bidding/BiddingStoreRequest.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace App\Http\Requests\Bidding;
+
+use App\Models\Bidding\Bidding;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class BiddingStoreRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            // 견적 연결 (선택사항)
+            'quote_id' => ['nullable', 'integer', 'exists:quotes,id'],
+            // 거래처/현장
+            'client_id' => ['nullable', 'integer'],
+            'client_name' => ['nullable', 'string', 'max:100'],
+            'project_name' => ['required', 'string', 'max:200'],
+            // 입찰 정보
+            'bidding_date' => ['nullable', 'date'],
+            'bid_date' => ['nullable', 'date'],
+            'submission_date' => ['nullable', 'date'],
+            'confirm_date' => ['nullable', 'date'],
+            'total_count' => ['nullable', 'integer', 'min:0'],
+            'bidding_amount' => ['nullable', 'numeric', 'min:0'],
+            // 상태 (기본값: waiting)
+            'status' => ['nullable', 'string', Rule::in(Bidding::STATUSES)],
+            // 입찰자
+            'bidder_id' => ['nullable', 'integer'],
+            'bidder_name' => ['nullable', 'string', 'max:50'],
+            // 공사기간
+            'construction_start_date' => ['nullable', 'date'],
+            'construction_end_date' => ['nullable', 'date', 'after_or_equal:construction_start_date'],
+            'vat_type' => ['nullable', 'string', Rule::in(Bidding::VAT_TYPES)],
+            // 비고
+            'remarks' => ['nullable', 'string'],
+            // 견적 데이터 스냅샷 (견적에서 전환 시)
+            'expense_items' => ['nullable', 'array'],
+            'estimate_detail_items' => ['nullable', 'array'],
+        ];
+    }
+
+    public function messages(): array
+    {
+        return [
+            'project_name.required' => __('validation.required', ['attribute' => '현장명']),
+            'quote_id.exists' => __('validation.exists', ['attribute' => '견적']),
+        ];
+    }
+}

app/Http/Requests/Bidding/BiddingUpdateRequest.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Http\Requests\Bidding;
+
+use App\Models\Bidding\Bidding;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class BiddingUpdateRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            // 거래처/현장
+            'client_id' => ['nullable', 'integer'],
+            'client_name' => ['nullable', 'string', 'max:100'],
+            'project_name' => ['nullable', 'string', 'max:200'],
+            // 입찰 정보
+            'bidding_date' => ['nullable', 'date'],
+            'bid_date' => ['nullable', 'date'],
+            'submission_date' => ['nullable', 'date'],
+            'confirm_date' => ['nullable', 'date'],
+            'total_count' => ['nullable', 'integer', 'min:0'],
+            'bidding_amount' => ['nullable', 'numeric', 'min:0'],
+            // 상태
+            'status' => ['nullable', 'string', Rule::in(Bidding::STATUSES)],
+            // 입찰자
+            'bidder_id' => ['nullable', 'integer'],
+            'bidder_name' => ['nullable', 'string', 'max:50'],
+            // 공사기간
+            'construction_start_date' => ['nullable', 'date'],
+            'construction_end_date' => ['nullable', 'date', 'after_or_equal:construction_start_date'],
+            'vat_type' => ['nullable', 'string', Rule::in(Bidding::VAT_TYPES)],
+            // 비고
+            'remarks' => ['nullable', 'string'],
+            // 견적 데이터 스냅샷
+            'expense_items' => ['nullable', 'array'],
+            'estimate_detail_items' => ['nullable', 'array'],
+        ];
+    }
+}

app/Http/Requests/Bidding/BulkDeleteRequest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Requests\Bidding;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class BulkDeleteRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'ids' => ['required', 'array', 'min:1'],
+            'ids.*' => ['required', 'integer'],
+        ];
+    }
+
+    public function messages(): array
+    {
+        return [
+            'ids.required' => __('validation.required', ['attribute' => 'ids']),
+            'ids.array' => __('validation.array', ['attribute' => 'ids']),
+            'ids.min' => __('validation.min.array', ['attribute' => 'ids', 'min' => 1]),
+        ];
+    }
+}

app/Models/Bidding/Bidding.php

@@ -0,0 +1,252 @@
+<?php
+
+namespace App\Models\Bidding;
+
+use App\Models\Members\User;
+use App\Models\Orders\Client;
+use App\Models\Quote\Quote;
+use App\Traits\BelongsToTenant;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Bidding extends Model
+{
+    use BelongsToTenant, HasFactory, SoftDeletes;
+
+    protected $fillable = [
+        'tenant_id',
+        'bidding_code',
+        'quote_id',
+        // 거래처/현장
+        'client_id',
+        'client_name',
+        'project_name',
+        // 입찰 정보
+        'bidding_date',
+        'bid_date',
+        'submission_date',
+        'confirm_date',
+        'total_count',
+        'bidding_amount',
+        // 상태
+        'status',
+        // 입찰자
+        'bidder_id',
+        'bidder_name',
+        // 공사기간
+        'construction_start_date',
+        'construction_end_date',
+        'vat_type',
+        // 비고
+        'remarks',
+        // 견적 데이터 스냅샷
+        'expense_items',
+        'estimate_detail_items',
+        // 감사
+        'created_by',
+        'updated_by',
+        'deleted_by',
+    ];
+
+    protected $casts = [
+        'bidding_date' => 'date',
+        'bid_date' => 'date',
+        'submission_date' => 'date',
+        'confirm_date' => 'date',
+        'construction_start_date' => 'date',
+        'construction_end_date' => 'date',
+        'bidding_amount' => 'decimal:2',
+        'expense_items' => 'array',
+        'estimate_detail_items' => 'array',
+        'created_at' => 'datetime',
+        'updated_at' => 'datetime',
+        'deleted_at' => 'datetime',
+    ];
+
+    /**
+     * 상태 상수
+     */
+    public const STATUS_WAITING = 'waiting';     // 입찰대기
+
+    public const STATUS_SUBMITTED = 'submitted'; // 투찰
+
+    public const STATUS_FAILED = 'failed';       // 탈락
+
+    public const STATUS_INVALID = 'invalid';     // 유찰
+
+    public const STATUS_AWARDED = 'awarded';     // 낙찰
+
+    public const STATUS_HOLD = 'hold';           // 보류
+
+    public const STATUSES = [
+        self::STATUS_WAITING,
+        self::STATUS_SUBMITTED,
+        self::STATUS_FAILED,
+        self::STATUS_INVALID,
+        self::STATUS_AWARDED,
+        self::STATUS_HOLD,
+    ];
+
+    /**
+     * 부가세 유형 상수
+     */
+    public const VAT_INCLUDED = 'included';
+
+    public const VAT_EXCLUDED = 'excluded';
+
+    public const VAT_TYPES = [
+        self::VAT_INCLUDED,
+        self::VAT_EXCLUDED,
+    ];
+
+    /**
+     * 연결된 견적
+     */
+    public function quote(): BelongsTo
+    {
+        return $this->belongsTo(Quote::class);
+    }
+
+    /**
+     * 거래처
+     */
+    public function client(): BelongsTo
+    {
+        return $this->belongsTo(Client::class);
+    }
+
+    /**
+     * 입찰자
+     */
+    public function bidder(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'bidder_id');
+    }
+
+    /**
+     * 생성자
+     */
+    public function creator(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
+    /**
+     * 수정자
+     */
+    public function updater(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'updated_by');
+    }
+
+    /**
+     * 상태별 스코프
+     */
+    public function scopeWaiting($query)
+    {
+        return $query->where('status', self::STATUS_WAITING);
+    }
+
+    public function scopeSubmitted($query)
+    {
+        return $query->where('status', self::STATUS_SUBMITTED);
+    }
+
+    public function scopeFailed($query)
+    {
+        return $query->where('status', self::STATUS_FAILED);
+    }
+
+    public function scopeInvalid($query)
+    {
+        return $query->where('status', self::STATUS_INVALID);
+    }
+
+    public function scopeAwarded($query)
+    {
+        return $query->where('status', self::STATUS_AWARDED);
+    }
+
+    public function scopeHold($query)
+    {
+        return $query->where('status', self::STATUS_HOLD);
+    }
+
+    /**
+     * 상태 필터 스코프
+     */
+    public function scopeOfStatus($query, ?string $status)
+    {
+        if ($status) {
+            return $query->where('status', $status);
+        }
+
+        return $query;
+    }
+
+    /**
+     * 날짜 범위 스코프
+     */
+    public function scopeDateRange($query, ?string $from, ?string $to)
+    {
+        if ($from) {
+            $query->where('bidding_date', '>=', $from);
+        }
+        if ($to) {
+            $query->where('bidding_date', '<=', $to);
+        }
+
+        return $query;
+    }
+
+    /**
+     * 검색 스코프
+     */
+    public function scopeSearch($query, ?string $keyword)
+    {
+        if (! $keyword) {
+            return $query;
+        }
+
+        return $query->where(function ($q) use ($keyword) {
+            $q->where('bidding_code', 'like', "%{$keyword}%")
+                ->orWhere('client_name', 'like', "%{$keyword}%")
+                ->orWhere('project_name', 'like', "%{$keyword}%")
+                ->orWhere('bidder_name', 'like', "%{$keyword}%");
+        });
+    }
+
+    /**
+     * 수정 가능 여부 확인
+     */
+    public function isEditable(): bool
+    {
+        return ! in_array($this->status, [self::STATUS_AWARDED, self::STATUS_FAILED, self::STATUS_INVALID]);
+    }
+
+    /**
+     * 삭제 가능 여부 확인
+     */
+    public function isDeletable(): bool
+    {
+        return ! in_array($this->status, [self::STATUS_AWARDED]);
+    }
+
+    /**
+     * 낙찰 가능 여부 확인
+     */
+    public function isAwardable(): bool
+    {
+        return in_array($this->status, [self::STATUS_WAITING, self::STATUS_SUBMITTED, self::STATUS_HOLD]);
+    }
+
+    /**
+     * 계약 전환 가능 여부 확인
+     */
+    public function isConvertibleToContract(): bool
+    {
+        return $this->status === self::STATUS_AWARDED;
+    }
+}

app/Services/Bidding/BiddingService.php

@@ -0,0 +1,261 @@
+<?php
+
+namespace App\Services\Bidding;
+
+use App\Models\Bidding\Bidding;
+use App\Services\Service;
+use Illuminate\Pagination\LengthAwarePaginator;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+
+class BiddingService extends Service
+{
+    /**
+     * 입찰 목록 조회 (페이지네이션, 필터링)
+     */
+    public function index(array $params): LengthAwarePaginator
+    {
+        $tenantId = $this->tenantId();
+
+        $query = Bidding::where('tenant_id', $tenantId)
+            ->with(['quote:id,quote_number']);
+
+        // 상태 필터
+        if (! empty($params['status'])) {
+            $query->where('status', $params['status']);
+        }
+
+        // 날짜 범위 필터
+        if (! empty($params['from_date'])) {
+            $query->where('bidding_date', '>=', $params['from_date']);
+        }
+        if (! empty($params['to_date'])) {
+            $query->where('bidding_date', '<=', $params['to_date']);
+        }
+
+        // 검색 (입찰번호, 거래처명, 현장명, 입찰자명)
+        if (! empty($params['search'])) {
+            $keyword = $params['search'];
+            $query->where(function ($q) use ($keyword) {
+                $q->where('bidding_code', 'like', "%{$keyword}%")
+                    ->orWhere('client_name', 'like', "%{$keyword}%")
+                    ->orWhere('project_name', 'like', "%{$keyword}%")
+                    ->orWhere('bidder_name', 'like', "%{$keyword}%");
+            });
+        }
+
+        // 정렬
+        $sortBy = $params['sort_by'] ?? 'bidding_date';
+        $sortDir = $params['sort_dir'] ?? 'desc';
+        $query->orderBy($sortBy, $sortDir);
+
+        // 페이지네이션 (최대 100개로 제한)
+        $perPage = min($params['per_page'] ?? 20, 100);
+
+        return $query->paginate($perPage);
+    }
+
+    /**
+     * 입찰 생성 (견적에서 전환 포함)
+     */
+    public function store(array $data): Bidding
+    {
+        $tenantId = $this->tenantId();
+        $userId = $this->apiUserId();
+
+        // 견적에서 전환하는 경우, 이미 입찰이 등록되었는지 체크
+        if (! empty($data['quote_id'])) {
+            $existingBidding = Bidding::where('tenant_id', $tenantId)
+                ->where('quote_id', $data['quote_id'])
+                ->first();
+
+            if ($existingBidding) {
+                throw new \Symfony\Component\HttpKernel\Exception\ConflictHttpException(
+                    __('error.bidding.already_registered', ['code' => $existingBidding->bidding_code])
+                );
+            }
+        }
+
+        // 입찰번호 자동 생성
+        $biddingCode = $this->generateBiddingCode($tenantId);
+
+        $bidding = Bidding::create([
+            'tenant_id' => $tenantId,
+            'bidding_code' => $biddingCode,
+            'quote_id' => $data['quote_id'] ?? null,
+            // 거래처/현장
+            'client_id' => $data['client_id'] ?? null,
+            'client_name' => $data['client_name'] ?? null,
+            'project_name' => $data['project_name'],
+            // 입찰 정보
+            'bidding_date' => $data['bidding_date'] ?? now()->toDateString(),
+            'bid_date' => $data['bid_date'] ?? null,
+            'submission_date' => $data['submission_date'] ?? null,
+            'confirm_date' => $data['confirm_date'] ?? null,
+            'total_count' => $data['total_count'] ?? 0,
+            'bidding_amount' => $data['bidding_amount'] ?? 0,
+            // 상태 (기본값: waiting)
+            'status' => $data['status'] ?? Bidding::STATUS_WAITING,
+            // 입찰자
+            'bidder_id' => $data['bidder_id'] ?? null,
+            'bidder_name' => $data['bidder_name'] ?? null,
+            // 공사기간
+            'construction_start_date' => $data['construction_start_date'] ?? null,
+            'construction_end_date' => $data['construction_end_date'] ?? null,
+            'vat_type' => $data['vat_type'] ?? Bidding::VAT_EXCLUDED,
+            // 비고
+            'remarks' => $data['remarks'] ?? null,
+            // 견적 데이터 스냅샷
+            'expense_items' => $data['expense_items'] ?? null,
+            'estimate_detail_items' => $data['estimate_detail_items'] ?? null,
+            // 감사
+            'created_by' => $userId,
+        ]);
+
+        return $bidding->load(['quote:id,quote_number']);
+    }
+
+    /**
+     * 입찰번호 자동 생성 (BID-YYYY-NNN)
+     */
+    private function generateBiddingCode(int $tenantId): string
+    {
+        $year = now()->year;
+        $prefix = "BID-{$year}-";
+
+        // 올해 생성된 마지막 입찰번호 조회
+        $lastBidding = Bidding::where('tenant_id', $tenantId)
+            ->where('bidding_code', 'like', "{$prefix}%")
+            ->orderBy('bidding_code', 'desc')
+            ->first();
+
+        if ($lastBidding) {
+            // 마지막 번호에서 숫자 추출 후 +1
+            $lastNumber = (int) substr($lastBidding->bidding_code, -3);
+            $nextNumber = $lastNumber + 1;
+        } else {
+            $nextNumber = 1;
+        }
+
+        return $prefix.str_pad($nextNumber, 3, '0', STR_PAD_LEFT);
+    }
+
+    /**
+     * 입찰 통계 조회
+     */
+    public function stats(): array
+    {
+        $tenantId = $this->tenantId();
+
+        return [
+            'total' => Bidding::where('tenant_id', $tenantId)->count(),
+            'waiting' => Bidding::where('tenant_id', $tenantId)->where('status', Bidding::STATUS_WAITING)->count(),
+            'submitted' => Bidding::where('tenant_id', $tenantId)->where('status', Bidding::STATUS_SUBMITTED)->count(),
+            'awarded' => Bidding::where('tenant_id', $tenantId)->where('status', Bidding::STATUS_AWARDED)->count(),
+            'failed' => Bidding::where('tenant_id', $tenantId)->where('status', Bidding::STATUS_FAILED)->count(),
+            'invalid' => Bidding::where('tenant_id', $tenantId)->where('status', Bidding::STATUS_INVALID)->count(),
+            'hold' => Bidding::where('tenant_id', $tenantId)->where('status', Bidding::STATUS_HOLD)->count(),
+        ];
+    }
+
+    /**
+     * 입찰 단건 조회
+     */
+    public function show(int $id): Bidding
+    {
+        $tenantId = $this->tenantId();
+
+        $bidding = Bidding::where('tenant_id', $tenantId)
+            ->with(['quote:id,quote_number,site_name,total_amount,status'])
+            ->find($id);
+
+        if (! $bidding) {
+            throw new NotFoundHttpException(__('error.not_found'));
+        }
+
+        return $bidding;
+    }
+
+    /**
+     * 입찰 수정
+     */
+    public function update(int $id, array $data): Bidding
+    {
+        $tenantId = $this->tenantId();
+        $userId = $this->apiUserId();
+
+        $bidding = Bidding::where('tenant_id', $tenantId)->find($id);
+
+        if (! $bidding) {
+            throw new NotFoundHttpException(__('error.not_found'));
+        }
+
+        $data['updated_by'] = $userId;
+        $bidding->update($data);
+
+        return $bidding->fresh(['quote:id,quote_number']);
+    }
+
+    /**
+     * 입찰 삭제 (소프트 삭제)
+     */
+    public function destroy(int $id): bool
+    {
+        $tenantId = $this->tenantId();
+        $userId = $this->apiUserId();
+
+        $bidding = Bidding::where('tenant_id', $tenantId)->find($id);
+
+        if (! $bidding) {
+            throw new NotFoundHttpException(__('error.not_found'));
+        }
+
+        $bidding->update(['deleted_by' => $userId]);
+        $bidding->delete();
+
+        return true;
+    }
+
+    /**
+     * 입찰 일괄 삭제
+     */
+    public function bulkDestroy(array $ids): int
+    {
+        $tenantId = $this->tenantId();
+        $userId = $this->apiUserId();
+
+        $biddings = Bidding::where('tenant_id', $tenantId)
+            ->whereIn('id', $ids)
+            ->get();
+
+        $deletedCount = 0;
+        foreach ($biddings as $bidding) {
+            $bidding->update(['deleted_by' => $userId]);
+            $bidding->delete();
+            $deletedCount++;
+        }
+
+        return $deletedCount;
+    }
+
+    /**
+     * 입찰 상태 변경
+     */
+    public function updateStatus(int $id, string $status): Bidding
+    {
+        $tenantId = $this->tenantId();
+        $userId = $this->apiUserId();
+
+        $bidding = Bidding::where('tenant_id', $tenantId)->find($id);
+
+        if (! $bidding) {
+            throw new NotFoundHttpException(__('error.not_found'));
+        }
+
+        $bidding->update([
+            'status' => $status,
+            'updated_by' => $userId,
+        ]);
+
+        return $bidding->fresh(['quote:id,quote_number']);
+    }
+}

app/Swagger/v1/BiddingApi.php

@@ -0,0 +1,360 @@
+<?php
+
+namespace App\Swagger\v1;
+
+/**
+ * @OA\Tag(
+ *     name="Bidding",
+ *     description="입찰관리 API"
+ * )
+ *
+ * @OA\Schema(
+ *     schema="Bidding",
+ *     type="object",
+ *
+ *     @OA\Property(property="id", type="integer", example=1),
+ *     @OA\Property(property="tenant_id", type="integer", example=1),
+ *     @OA\Property(property="bidding_code", type="string", example="BID-20260119-0001"),
+ *     @OA\Property(property="quote_id", type="integer", nullable=true, example=1),
+ *     @OA\Property(property="client_id", type="integer", nullable=true, example=1),
+ *     @OA\Property(property="client_name", type="string", nullable=true, example="삼성물산"),
+ *     @OA\Property(property="project_name", type="string", nullable=true, example="강남역 오피스타워 신축공사"),
+ *     @OA\Property(property="bidding_date", type="string", format="date", nullable=true, example="2026-01-19"),
+ *     @OA\Property(property="bid_date", type="string", format="date", nullable=true, example="2026-02-01"),
+ *     @OA\Property(property="submission_date", type="string", format="date", nullable=true, example="2026-01-25"),
+ *     @OA\Property(property="confirm_date", type="string", format="date", nullable=true, example="2026-02-15"),
+ *     @OA\Property(property="total_count", type="integer", nullable=true, example=1),
+ *     @OA\Property(property="bidding_amount", type="number", format="float", nullable=true, example=150000000),
+ *     @OA\Property(property="status", type="string", enum={"waiting", "submitted", "failed", "invalid", "awarded", "hold"}, example="waiting"),
+ *     @OA\Property(property="bidder_id", type="integer", nullable=true, example=1),
+ *     @OA\Property(property="bidder_name", type="string", nullable=true, example="홍길동"),
+ *     @OA\Property(property="construction_start_date", type="string", format="date", nullable=true, example="2026-03-01"),
+ *     @OA\Property(property="construction_end_date", type="string", format="date", nullable=true, example="2026-12-31"),
+ *     @OA\Property(property="vat_type", type="string", enum={"included", "excluded"}, example="included"),
+ *     @OA\Property(property="remarks", type="string", nullable=true, example="특이사항 없음"),
+ *     @OA\Property(property="expense_items", type="array", nullable=true, @OA\Items(type="object")),
+ *     @OA\Property(property="estimate_detail_items", type="array", nullable=true, @OA\Items(type="object")),
+ *     @OA\Property(property="created_by", type="integer", nullable=true),
+ *     @OA\Property(property="updated_by", type="integer", nullable=true),
+ *     @OA\Property(property="created_at", type="string", format="date-time"),
+ *     @OA\Property(property="updated_at", type="string", format="date-time"),
+ *     @OA\Property(property="quote", type="object", nullable=true),
+ *     @OA\Property(property="client", type="object", nullable=true),
+ *     @OA\Property(property="bidder", type="object", nullable=true)
+ * )
+ *
+ * @OA\Schema(
+ *     schema="BiddingPagination",
+ *     type="object",
+ *
+ *     @OA\Property(property="current_page", type="integer", example=1),
+ *     @OA\Property(property="data", type="array", @OA\Items(ref="#/components/schemas/Bidding")),
+ *     @OA\Property(property="first_page_url", type="string"),
+ *     @OA\Property(property="from", type="integer"),
+ *     @OA\Property(property="last_page", type="integer"),
+ *     @OA\Property(property="last_page_url", type="string"),
+ *     @OA\Property(property="next_page_url", type="string", nullable=true),
+ *     @OA\Property(property="path", type="string"),
+ *     @OA\Property(property="per_page", type="integer"),
+ *     @OA\Property(property="prev_page_url", type="string", nullable=true),
+ *     @OA\Property(property="to", type="integer"),
+ *     @OA\Property(property="total", type="integer")
+ * )
+ *
+ * @OA\Schema(
+ *     schema="BiddingStats",
+ *     type="object",
+ *
+ *     @OA\Property(property="total", type="integer", example=100),
+ *     @OA\Property(property="waiting", type="integer", example=30),
+ *     @OA\Property(property="submitted", type="integer", example=20),
+ *     @OA\Property(property="failed", type="integer", example=10),
+ *     @OA\Property(property="invalid", type="integer", example=5),
+ *     @OA\Property(property="awarded", type="integer", example=30),
+ *     @OA\Property(property="hold", type="integer", example=5),
+ *     @OA\Property(property="total_amount", type="number", format="float", example=5000000000),
+ *     @OA\Property(property="awarded_amount", type="number", format="float", example=3000000000)
+ * )
+ *
+ * @OA\Schema(
+ *     schema="BiddingUpdateRequest",
+ *     type="object",
+ *
+ *     @OA\Property(property="client_id", type="integer", nullable=true),
+ *     @OA\Property(property="client_name", type="string", nullable=true, maxLength=100),
+ *     @OA\Property(property="project_name", type="string", nullable=true, maxLength=200),
+ *     @OA\Property(property="bidding_date", type="string", format="date", nullable=true),
+ *     @OA\Property(property="bid_date", type="string", format="date", nullable=true),
+ *     @OA\Property(property="submission_date", type="string", format="date", nullable=true),
+ *     @OA\Property(property="confirm_date", type="string", format="date", nullable=true),
+ *     @OA\Property(property="total_count", type="integer", nullable=true, minimum=0),
+ *     @OA\Property(property="bidding_amount", type="number", format="float", nullable=true, minimum=0),
+ *     @OA\Property(property="status", type="string", enum={"waiting", "submitted", "failed", "invalid", "awarded", "hold"}, nullable=true),
+ *     @OA\Property(property="bidder_id", type="integer", nullable=true),
+ *     @OA\Property(property="bidder_name", type="string", nullable=true, maxLength=50),
+ *     @OA\Property(property="construction_start_date", type="string", format="date", nullable=true),
+ *     @OA\Property(property="construction_end_date", type="string", format="date", nullable=true),
+ *     @OA\Property(property="vat_type", type="string", enum={"included", "excluded"}, nullable=true),
+ *     @OA\Property(property="remarks", type="string", nullable=true),
+ *     @OA\Property(property="expense_items", type="array", nullable=true, @OA\Items(type="object")),
+ *     @OA\Property(property="estimate_detail_items", type="array", nullable=true, @OA\Items(type="object"))
+ * )
+ *
+ * @OA\Schema(
+ *     schema="BiddingStatusRequest",
+ *     type="object",
+ *     required={"status"},
+ *
+ *     @OA\Property(property="status", type="string", enum={"waiting", "submitted", "failed", "invalid", "awarded", "hold"}, example="submitted")
+ * )
+ *
+ * @OA\Schema(
+ *     schema="BiddingBulkDeleteRequest",
+ *     type="object",
+ *     required={"ids"},
+ *
+ *     @OA\Property(property="ids", type="array", @OA\Items(type="integer"), example={1, 2, 3})
+ * )
+ */
+class BiddingApi
+{
+    /**
+     * @OA\Get(
+     *     path="/api/v1/biddings",
+     *     tags={"Bidding"},
+     *     summary="입찰 목록 조회",
+     *     description="입찰 목록을 페이징하여 조회합니다.",
+     *     security={{"ApiKeyAuth": {}}, {"BearerAuth": {}}},
+     *
+     *     @OA\Parameter(name="page", in="query", @OA\Schema(type="integer", default=1)),
+     *     @OA\Parameter(name="size", in="query", @OA\Schema(type="integer", default=20)),
+     *     @OA\Parameter(name="q", in="query", description="검색어 (입찰번호, 현장명, 거래처명)", @OA\Schema(type="string")),
+     *     @OA\Parameter(name="status", in="query", description="상태 필터", @OA\Schema(type="string", enum={"waiting", "submitted", "failed", "invalid", "awarded", "hold"})),
+     *     @OA\Parameter(name="client_id", in="query", description="거래처 ID", @OA\Schema(type="integer")),
+     *     @OA\Parameter(name="bidder_id", in="query", description="입찰담당자 ID", @OA\Schema(type="integer")),
+     *     @OA\Parameter(name="date_from", in="query", description="입찰일 시작", @OA\Schema(type="string", format="date")),
+     *     @OA\Parameter(name="date_to", in="query", description="입찰일 종료", @OA\Schema(type="string", format="date")),
+     *     @OA\Parameter(name="sort_by", in="query", description="정렬 기준", @OA\Schema(type="string", default="bidding_date")),
+     *     @OA\Parameter(name="sort_order", in="query", description="정렬 순서", @OA\Schema(type="string", enum={"asc", "desc"}, default="desc")),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="성공",
+     *
+     *         @OA\JsonContent(
+     *
+     *             @OA\Property(property="success", type="boolean", example=true),
+     *             @OA\Property(property="message", type="string"),
+     *             @OA\Property(property="data", ref="#/components/schemas/BiddingPagination")
+     *         )
+     *     )
+     * )
+     */
+    public function index() {}
+
+    /**
+     * @OA\Get(
+     *     path="/api/v1/biddings/stats",
+     *     tags={"Bidding"},
+     *     summary="입찰 통계 조회",
+     *     description="상태별 입찰 건수와 금액을 조회합니다.",
+     *     security={{"ApiKeyAuth": {}}, {"BearerAuth": {}}},
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="성공",
+     *
+     *         @OA\JsonContent(
+     *
+     *             @OA\Property(property="success", type="boolean", example=true),
+     *             @OA\Property(property="message", type="string"),
+     *             @OA\Property(property="data", ref="#/components/schemas/BiddingStats")
+     *         )
+     *     )
+     * )
+     */
+    public function stats() {}
+
+    /**
+     * @OA\Get(
+     *     path="/api/v1/biddings/{id}",
+     *     tags={"Bidding"},
+     *     summary="입찰 단건 조회",
+     *     description="입찰 상세 정보를 조회합니다.",
+     *     security={{"ApiKeyAuth": {}}, {"BearerAuth": {}}},
+     *
+     *     @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="성공",
+     *
+     *         @OA\JsonContent(
+     *
+     *             @OA\Property(property="success", type="boolean", example=true),
+     *             @OA\Property(property="message", type="string"),
+     *             @OA\Property(property="data", ref="#/components/schemas/Bidding")
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=404, description="입찰을 찾을 수 없습니다")
+     * )
+     */
+    public function show() {}
+
+    /**
+     * @OA\Put(
+     *     path="/api/v1/biddings/{id}",
+     *     tags={"Bidding"},
+     *     summary="입찰 수정",
+     *     description="입찰 정보를 수정합니다.",
+     *     security={{"ApiKeyAuth": {}}, {"BearerAuth": {}}},
+     *
+     *     @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *
+     *     @OA\RequestBody(
+     *         required=true,
+     *
+     *         @OA\JsonContent(ref="#/components/schemas/BiddingUpdateRequest")
+     *     ),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="성공",
+     *
+     *         @OA\JsonContent(
+     *
+     *             @OA\Property(property="success", type="boolean", example=true),
+     *             @OA\Property(property="message", type="string"),
+     *             @OA\Property(property="data", ref="#/components/schemas/Bidding")
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=404, description="입찰을 찾을 수 없습니다"),
+     *     @OA\Response(response=422, description="유효성 검증 실패")
+     * )
+     */
+    public function update() {}
+
+    /**
+     * @OA\Delete(
+     *     path="/api/v1/biddings/{id}",
+     *     tags={"Bidding"},
+     *     summary="입찰 삭제",
+     *     description="입찰을 삭제합니다 (Soft Delete).",
+     *     security={{"ApiKeyAuth": {}}, {"BearerAuth": {}}},
+     *
+     *     @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="성공",
+     *
+     *         @OA\JsonContent(
+     *
+     *             @OA\Property(property="success", type="boolean", example=true),
+     *             @OA\Property(property="message", type="string"),
+     *             @OA\Property(property="data", type="null")
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=404, description="입찰을 찾을 수 없습니다")
+     * )
+     */
+    public function destroy() {}
+
+    /**
+     * @OA\Delete(
+     *     path="/api/v1/biddings/bulk",
+     *     tags={"Bidding"},
+     *     summary="입찰 일괄 삭제",
+     *     description="여러 입찰을 일괄 삭제합니다 (Soft Delete).",
+     *     security={{"ApiKeyAuth": {}}, {"BearerAuth": {}}},
+     *
+     *     @OA\RequestBody(
+     *         required=true,
+     *
+     *         @OA\JsonContent(ref="#/components/schemas/BiddingBulkDeleteRequest")
+     *     ),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="성공",
+     *
+     *         @OA\JsonContent(
+     *
+     *             @OA\Property(property="success", type="boolean", example=true),
+     *             @OA\Property(property="message", type="string"),
+     *             @OA\Property(property="data", type="object",
+     *                 @OA\Property(property="deleted_count", type="integer", example=3)
+     *             )
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=422, description="유효성 검증 실패")
+     * )
+     */
+    public function bulkDestroy() {}
+
+    /**
+     * @OA\Patch(
+     *     path="/api/v1/biddings/{id}/status",
+     *     tags={"Bidding"},
+     *     summary="입찰 상태 변경",
+     *     description="입찰 상태를 변경합니다.",
+     *     security={{"ApiKeyAuth": {}}, {"BearerAuth": {}}},
+     *
+     *     @OA\Parameter(name="id", in="path", required=true, @OA\Schema(type="integer")),
+     *
+     *     @OA\RequestBody(
+     *         required=true,
+     *
+     *         @OA\JsonContent(ref="#/components/schemas/BiddingStatusRequest")
+     *     ),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="성공",
+     *
+     *         @OA\JsonContent(
+     *
+     *             @OA\Property(property="success", type="boolean", example=true),
+     *             @OA\Property(property="message", type="string"),
+     *             @OA\Property(property="data", ref="#/components/schemas/Bidding")
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=404, description="입찰을 찾을 수 없습니다"),
+     *     @OA\Response(response=422, description="유효성 검증 실패")
+     * )
+     */
+    public function updateStatus() {}
+
+    /**
+     * @OA\Post(
+     *     path="/api/v1/quotes/{id}/convert-to-bidding",
+     *     tags={"Bidding"},
+     *     summary="견적을 입찰로 변환",
+     *     description="시공 견적을 입찰로 변환합니다. 견적 데이터 스냅샷이 저장됩니다.",
+     *     security={{"ApiKeyAuth": {}}, {"BearerAuth": {}}},
+     *
+     *     @OA\Parameter(name="id", in="path", required=true, description="견적 ID", @OA\Schema(type="integer")),
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="성공",
+     *
+     *         @OA\JsonContent(
+     *
+     *             @OA\Property(property="success", type="boolean", example=true),
+     *             @OA\Property(property="message", type="string"),
+     *             @OA\Property(property="data", ref="#/components/schemas/Bidding")
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=404, description="견적을 찾을 수 없습니다"),
+     *     @OA\Response(response=400, description="이미 입찰로 변환된 견적입니다")
+     * )
+     */
+    public function convertToBidding() {}
+}

database/migrations/2026_01_19_100000_create_biddings_table.php

@@ -0,0 +1,77 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('biddings', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->constrained()->comment('테넌트 ID');
+
+            // 기본 정보
+            $table->string('bidding_code', 50)->comment('입찰번호 (예: BID-2025-001)');
+            $table->foreignId('quote_id')->nullable()->comment('연결된 견적 ID (quotes.id)');
+
+            // 거래처/현장
+            $table->unsignedBigInteger('client_id')->nullable()->comment('거래처 ID');
+            $table->string('client_name', 100)->nullable()->comment('거래처명 (스냅샷)');
+            $table->string('project_name', 200)->nullable()->comment('현장명');
+
+            // 입찰 정보
+            $table->date('bidding_date')->nullable()->comment('입찰일');
+            $table->date('bid_date')->nullable()->comment('입찰일 (레거시 호환)');
+            $table->date('submission_date')->nullable()->comment('투찰일');
+            $table->date('confirm_date')->nullable()->comment('확정일');
+            $table->unsignedInteger('total_count')->default(0)->comment('총 개소');
+            $table->decimal('bidding_amount', 15, 2)->default(0)->comment('입찰금액');
+
+            // 상태 (waiting/submitted/failed/invalid/awarded/hold)
+            $table->string('status', 20)->default('waiting')->comment('상태');
+
+            // 입찰자
+            $table->unsignedBigInteger('bidder_id')->nullable()->comment('입찰자 ID');
+            $table->string('bidder_name', 50)->nullable()->comment('입찰자명 (스냅샷)');
+
+            // 공사기간
+            $table->date('construction_start_date')->nullable()->comment('공사 시작일');
+            $table->date('construction_end_date')->nullable()->comment('공사 종료일');
+            $table->string('vat_type', 20)->default('excluded')->comment('부가세 (included/excluded)');
+
+            // 비고
+            $table->text('remarks')->nullable()->comment('비고');
+
+            // 견적 데이터 스냅샷 (JSON)
+            $table->json('expense_items')->nullable()->comment('공과 항목 스냅샷');
+            $table->json('estimate_detail_items')->nullable()->comment('견적 상세 항목 스냅샷');
+
+            // 감사
+            $table->foreignId('created_by')->nullable()->comment('생성자');
+            $table->foreignId('updated_by')->nullable()->comment('수정자');
+            $table->foreignId('deleted_by')->nullable()->comment('삭제자');
+            $table->timestamps();
+            $table->softDeletes();
+
+            // 인덱스
+            $table->index('tenant_id', 'idx_biddings_tenant_id');
+            $table->index('status', 'idx_biddings_status');
+            $table->index('bidding_date', 'idx_biddings_bidding_date');
+            $table->index('quote_id', 'idx_biddings_quote_id');
+            $table->unique(['tenant_id', 'bidding_code', 'deleted_at'], 'uq_tenant_bidding_code');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('biddings');
+    }
+};

database/seeders/BiddingSeeder.php

@@ -0,0 +1,198 @@
+<?php
+
+namespace Database\Seeders;
+
+use App\Models\Bidding\Bidding;
+use App\Models\Tenants\Tenant;
+use Illuminate\Database\Seeder;
+
+class BiddingSeeder extends Seeder
+{
+    /**
+     * 입찰 더미데이터 10건 Seed
+     * React 목업 데이터 기준
+     */
+    public function run(): void
+    {
+        // 첫 번째 테넌트 ID 가져오기
+        $tenant = Tenant::first();
+        if (! $tenant) {
+            $this->command->warn('테넌트가 없습니다. TenantSeeder를 먼저 실행하세요.');
+
+            return;
+        }
+
+        $tenantId = $tenant->id;
+
+        $biddings = [
+            [
+                'bidding_code' => 'BID-2025-001',
+                'client_name' => '이사대표',
+                'project_name' => '광장 아파트',
+                'bidding_date' => '2025-01-25',
+                'total_count' => 15,
+                'bidding_amount' => 71000000,
+                'bid_date' => '2025-01-20',
+                'submission_date' => '2025-01-22',
+                'confirm_date' => '2025-01-25',
+                'status' => 'awarded',
+                'bidder_name' => '홍길동',
+                'remarks' => '',
+            ],
+            [
+                'bidding_code' => 'BID-2025-002',
+                'client_name' => '야사건설',
+                'project_name' => '대림아파트',
+                'bidding_date' => '2025-01-20',
+                'total_count' => 22,
+                'bidding_amount' => 100000000,
+                'bid_date' => '2025-01-18',
+                'submission_date' => null,
+                'confirm_date' => null,
+                'status' => 'waiting',
+                'bidder_name' => '김철수',
+                'remarks' => '',
+            ],
+            [
+                'bidding_code' => 'BID-2025-003',
+                'client_name' => '여의건설',
+                'project_name' => '현장아파트',
+                'bidding_date' => '2025-01-18',
+                'total_count' => 18,
+                'bidding_amount' => 85000000,
+                'bid_date' => '2025-01-15',
+                'submission_date' => '2025-01-16',
+                'confirm_date' => '2025-01-18',
+                'status' => 'awarded',
+                'bidder_name' => '홍길동',
+                'remarks' => '',
+            ],
+            [
+                'bidding_code' => 'BID-2025-004',
+                'client_name' => '이사대표',
+                'project_name' => '송파타워',
+                'bidding_date' => '2025-01-15',
+                'total_count' => 30,
+                'bidding_amount' => 120000000,
+                'bid_date' => '2025-01-12',
+                'submission_date' => '2025-01-13',
+                'confirm_date' => '2025-01-15',
+                'status' => 'failed',
+                'bidder_name' => '이영희',
+                'remarks' => '가격 경쟁력 부족',
+            ],
+            [
+                'bidding_code' => 'BID-2025-005',
+                'client_name' => '야사건설',
+                'project_name' => '강남센터',
+                'bidding_date' => '2025-01-12',
+                'total_count' => 25,
+                'bidding_amount' => 95000000,
+                'bid_date' => '2025-01-10',
+                'submission_date' => '2025-01-11',
+                'confirm_date' => null,
+                'status' => 'submitted',
+                'bidder_name' => '홍길동',
+                'remarks' => '',
+            ],
+            [
+                'bidding_code' => 'BID-2025-006',
+                'client_name' => '여의건설',
+                'project_name' => '목동센터',
+                'bidding_date' => '2025-01-10',
+                'total_count' => 12,
+                'bidding_amount' => 78000000,
+                'bid_date' => '2025-01-08',
+                'submission_date' => '2025-01-09',
+                'confirm_date' => '2025-01-10',
+                'status' => 'invalid',
+                'bidder_name' => '김철수',
+                'remarks' => '입찰 조건 미충족',
+            ],
+            [
+                'bidding_code' => 'BID-2025-007',
+                'client_name' => '이사대표',
+                'project_name' => '서초타워',
+                'bidding_date' => '2025-01-08',
+                'total_count' => 35,
+                'bidding_amount' => 150000000,
+                'bid_date' => '2025-01-05',
+                'submission_date' => null,
+                'confirm_date' => null,
+                'status' => 'waiting',
+                'bidder_name' => '이영희',
+                'remarks' => '',
+            ],
+            [
+                'bidding_code' => 'BID-2025-008',
+                'client_name' => '야사건설',
+                'project_name' => '청담프로젝트',
+                'bidding_date' => '2025-01-05',
+                'total_count' => 40,
+                'bidding_amount' => 200000000,
+                'bid_date' => '2025-01-03',
+                'submission_date' => '2025-01-04',
+                'confirm_date' => '2025-01-05',
+                'status' => 'awarded',
+                'bidder_name' => '홍길동',
+                'remarks' => '',
+            ],
+            [
+                'bidding_code' => 'BID-2025-009',
+                'client_name' => '여의건설',
+                'project_name' => '잠실센터',
+                'bidding_date' => '2025-01-03',
+                'total_count' => 20,
+                'bidding_amount' => 88000000,
+                'bid_date' => '2025-01-01',
+                'submission_date' => null,
+                'confirm_date' => null,
+                'status' => 'hold',
+                'bidder_name' => '김철수',
+                'remarks' => '검토 대기 중',
+            ],
+            [
+                'bidding_code' => 'BID-2025-010',
+                'client_name' => '이사대표',
+                'project_name' => '역삼빌딩',
+                'bidding_date' => '2025-01-01',
+                'total_count' => 10,
+                'bidding_amount' => 65000000,
+                'bid_date' => '2024-12-28',
+                'submission_date' => null,
+                'confirm_date' => null,
+                'status' => 'waiting',
+                'bidder_name' => '이영희',
+                'remarks' => '',
+            ],
+        ];
+
+        foreach ($biddings as $data) {
+            Bidding::create([
+                'tenant_id' => $tenantId,
+                'bidding_code' => $data['bidding_code'],
+                'client_name' => $data['client_name'],
+                'project_name' => $data['project_name'],
+                'bidding_date' => $data['bidding_date'],
+                'total_count' => $data['total_count'],
+                'bidding_amount' => $data['bidding_amount'],
+                'bid_date' => $data['bid_date'],
+                'submission_date' => $data['submission_date'],
+                'confirm_date' => $data['confirm_date'],
+                'status' => $data['status'],
+                'bidder_name' => $data['bidder_name'],
+                'remarks' => $data['remarks'],
+                'vat_type' => 'excluded',
+                'created_by' => 1,
+            ]);
+        }
+
+        $this->command->info('입찰 더미데이터 10건이 생성되었습니다.');
+        $this->command->info('- waiting: 3건 (BID-002, 007, 010)');
+        $this->command->info('- awarded: 3건 (BID-001, 003, 008)');
+        $this->command->info('- submitted: 1건 (BID-005)');
+        $this->command->info('- failed: 1건 (BID-004)');
+        $this->command->info('- invalid: 1건 (BID-006)');
+        $this->command->info('- hold: 1건 (BID-009)');
+    }
+}

lang/ko/error.php

@@ -390,4 +390,13 @@
         'cannot_delete_completed' => '완료된 검사는 삭제할 수 없습니다.',
         'already_completed' => '이미 완료된 검사입니다.',
     ],
+
+    // 입찰 관련
+    'bidding' => [
+        'not_found' => '입찰을 찾을 수 없습니다.',
+        'already_converted' => '이미 입찰로 변환된 견적입니다.',
+        'already_registered' => '이미 입찰이 등록된 견적입니다. (입찰번호: :code)',
+        'cannot_delete' => '해당 입찰은 삭제할 수 없습니다.',
+        'invalid_status' => '유효하지 않은 입찰 상태입니다.',
+    ],
 ];