chore(WEB): 견적 액션 정리 및 아키텍처 문서 추가

- quotes/actions.ts 중복 코드 제거 및 간소화
- quotes/types.ts 타입 확장
- claudedocs/_index.md 업데이트
- 멀티테넌시 최적화 로드맵 문서 추가
- 리팩토링 로드맵 문서 추가

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/quotes/actions.ts

@@ -30,6 +30,7 @@ import type {
   QuoteStatus,
   ProductCategory,
   BomCalculationResultItem,
+  BomCalculationResult,
 } from './types';
 import { transformApiToFrontend, transformFrontendToApi } from './types';
 
@@ -901,36 +902,8 @@ export interface BomCalculateItem {
   inspectionFee?: number;
 }
 
-export interface BomCalculationResult {
-  success?: boolean;
-  finished_goods: {
-    code: string;
-    name: string;
-    item_category?: string;
-  };
-  variables?: Record<string, unknown>;
-  items: Array<{
-    item_code: string;
-    item_name: string;
-    item_category?: string;
-    specification?: string;
-    unit?: string;
-    quantity: number;
-    quantity_formula?: string;
-    base_price?: number;
-    multiplier?: number;
-    unit_price: number;
-    total_price: number;
-    calculation_note?: string;
-    category_group?: string;
-    process_group?: string;
-    process_group_key?: string;
-  }>;
-  grouped_items?: Record<string, { items: BomCalculationResultItem[]; [key: string]: unknown }>;
-  subtotals: Record<string, { name?: string; count?: number; subtotal?: number } | number>;
-  grand_total: number;
-  debug_steps?: Array<{ step: number; name: string; data: Record<string, unknown> }>;  // 10단계 계산 과정
-}
+// BomCalculationResult는 types.ts에서 import하고 re-export
+export type { BomCalculationResult } from './types';
 
 // API 서버 응답 구조 (QuoteCalculationService::calculateBomBulk)
 export interface BomBulkResponse {