feat: implement CleanerService for ERP material deletion

**Core Implementation (src/main/services/erp/cleaner.ts):**
- CleanerService class with dry-run mode support
- Material deletion logic with safety constraints:
  - Row numbers 7000-7999 are protected
  - Materials with pending quantity are skipped
  - Materials not in delete list are ignored
- Order processing with nested iframe navigation
- Progress callback support for UI integration

**Types (src/main/types/cleaner.types.ts):**
- CleanerInput: order numbers, material codes, dry-run flag
- CleanerResult: processing statistics and details
- OrderCleanDetail: per-order breakdown

**Tests:**
- Unit tests for shouldDeleteMaterial logic
- Integration tests for order processing
- Dry-run mode validation
- Navigation tests

Reference: playwrite/utils/discrete_material_plan_cleaner.py

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

src/main/types/cleaner.types.ts

@@ -1,21 +1,21 @@
 export interface CleanerInput {
-  orderNumbers: string[];
-  materialCodes: string[];
-  dryRun: boolean;
-  onProgress?: (message: string, progress: number) => void;
+  orderNumbers: string[]
+  materialCodes: string[]
+  dryRun: boolean
+  onProgress?: (message: string, progress?: number) => void
 }
 
 export interface CleanerResult {
-  ordersProcessed: number;
-  materialsDeleted: number;
-  materialsSkipped: number;
-  errors: string[];
-  details: OrderCleanDetail[];
+  ordersProcessed: number
+  materialsDeleted: number
+  materialsSkipped: number
+  errors: string[]
+  details: OrderCleanDetail[]
 }
 
 export interface OrderCleanDetail {
-  orderNumber: string;
-  materialsDeleted: number;
-  materialsSkipped: number;
-  errors: string[];
-}
+  orderNumber: string
+  materialsDeleted: number
+  materialsSkipped: number
+  errors: string[]
+}