fix(types): resolve TypeScript unused variable errors

Fix all TS6133 errors (unused variables) across service layer:

- Remove unused imports (path, ExtractionProgress type)
- Prefix unused parameters with underscore (_session, _totalBatches, etc.)
- Remove unused _verbose field and constructor from ExcelParser
- Remove unused _importToDatabase method from ExtractorService
- Remove unused _importProgress variable

This ensures clean type checking and eliminates dead code.

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

src/main/services/erp/extractor-core.ts

@@ -6,9 +6,6 @@ import type {
   ExtractorCoreResult,
   ExtractionProgress
 } from '../../types/extractor.types'
-import { createLogger } from '../logger'
-
-const log = createLogger('ExtractorCore')
 
 /**
  * ExtractorCore - Handles all web page operations for data extraction
@@ -142,12 +139,12 @@ export class ExtractorCore {
    * Reference: Python download_batch() method lines 133-175
    */
   private async downloadBatch(
-    session: ErpSession,
+    _session: ErpSession,
     popupPage: any,
     workFrame: any,
     orderNumbers: string[],
     batchIndex: number,
-    totalBatches: number,
+    _totalBatches: number,
     downloadDir: string
   ): Promise<string> {
     // Fill order numbers (Python lines 143-145)

src/main/services/erp/extractor.ts

@@ -7,8 +7,7 @@ import type {
   ExtractorInput,
   ExtractorResult,
   ImportResult,
-  LogLevel,
-  ExtractionProgress
+  LogLevel
 } from '../../types/extractor.types'
 import { DataImportService } from '../database/data-importer'
 import { createLogger } from '../logger'
@@ -72,7 +71,6 @@ export class ExtractorService {
         const totalPoints = 1 + totalBatches + 2
         const progressPerPoint = 100 / totalPoints
         const mergeProgress = (1 + totalBatches) * progressPerPoint
-        const importProgress = (1 + totalBatches + 1) * progressPerPoint
 
         input.onProgress?.('正在合并文件...', mergeProgress, {
           phase: 'merging',
@@ -131,7 +129,7 @@ export class ExtractorService {
     }
 
     log.info('Starting merge', { fileCount: filePaths.length })
-    const parser = new ExcelParser({ verbose: true })
+    const parser = new ExcelParser()
 
     // Collect all orders with full order info and materials
     // Each order has: { orderInfo: OrderHeader, materials: MaterialRow[] }
@@ -306,42 +304,6 @@ export class ExtractorService {
     }
   }
 
-  /**
-   * Import merged Excel data to database
-   * @param filePath - Path to the merged Excel file
-   * @returns Import result with statistics
-   */
-  private async importToDatabase(filePath: string): Promise<ImportResult> {
-    log.info('Starting database import', { filePath })
-
-    const importService = new DataImportService()
-
-    try {
-      const result = await importService.importFromExcel(filePath, 1000)
-
-      log.info('Import completed', {
-        success: result.success,
-        recordsRead: result.recordsRead,
-        recordsDeleted: result.recordsDeleted,
-        recordsImported: result.recordsImported
-      })
-
-      return result
-    } catch (error) {
-      const errorMsg = error instanceof Error ? error.message : String(error)
-      log.error('Import failed', { error: errorMsg })
-
-      return {
-        success: false,
-        recordsRead: 0,
-        recordsDeleted: 0,
-        recordsImported: 0,
-        uniqueSourceNumbers: 0,
-        errors: [errorMsg]
-      }
-    }
-  }
-
   /**
    * Import merged Excel data to database with logging
    * @param filePath - Path to the merged Excel file