feat: implement IPC handlers, database services and Extractor UI

- Add SqlServerService and MySqlService for database persistence
- Implement IPC handlers for file, extractor, cleaner, and database operations
- Define IPC API types and update preload script
- Create ExtractorPage UI with OrderNumberInput component
- Add unit and integration tests for MySQL and SQL Server
- Update vitest config with path aliases

src/main/ipc/cleaner-handler.ts

@@ -0,0 +1,49 @@
+import { ipcMain } from 'electron'
+import { ErpAuthService } from '../services/erp/erp-auth'
+import { CleanerService } from '../services/erp/cleaner'
+import type { CleanerInput, CleanerResult } from '../types/cleaner.types'
+
+/**
+ * Register IPC handlers for cleaner service
+ */
+export function registerCleanerHandlers(): void {
+  ipcMain.handle(
+    'cleaner:run',
+    async (
+      _event,
+      input: CleanerInput
+    ): Promise<{ success: boolean; data?: CleanerResult; error?: string }> => {
+      let authService: ErpAuthService | null = null
+
+      try {
+        // Create auth service and login
+        authService = new ErpAuthService({
+          url: process.env.ERP_URL || '',
+          username: process.env.ERP_USERNAME || '',
+          password: process.env.ERP_PASSWORD || '',
+          headless: true
+        })
+
+        await authService.login()
+
+        // Create cleaner service and run cleaning
+        const cleaner = new CleanerService(authService)
+        const result = await cleaner.clean(input)
+
+        return { success: true, data: result }
+      } catch (error) {
+        const message = error instanceof Error ? error.message : 'Unknown error'
+        return { success: false, error: message }
+      } finally {
+        // Clean up: close browser
+        if (authService) {
+          try {
+            await authService.close()
+          } catch {
+            // Ignore cleanup errors
+          }
+        }
+      }
+    }
+  )
+}