feat: define ERP page element locators

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

src/main/services/erp/locators.ts

@@ -0,0 +1,44 @@
+/**
+ * ERP Page Element Locators
+ * Reference: playwrite/utils/ discrete_material_plan_extractor.py
+ * Reference: playwrite/utils/ discrete_material_plan_cleaner.py
+ */
+
+export const ERP_LOCATORS = {
+  // Login Page
+  login: {
+    usernameInput: '#username',
+    passwordInput: '#password',
+    submitButton: 'button[type="submit"]',
+  },
+
+  // Main Frame
+  main: {
+    mainIframe: '#mainiframe',
+    loadingOverlay: '.loading-overlay',
+    contentFrame: '#contentframe',
+  },
+
+  // Extractor (Data Export) Page
+  extractor: {
+    orderNumberInput: 'input[name="orderNumber"]',
+    queryButton: 'button:has-text("查询")',
+    exportButton: 'button:has-text("导出")',
+  },
+
+  // Cleaner (Material Delete) Page
+  cleaner: {
+    orderNumberInput: 'input[name="orderNumber"]',
+    materialGrid: 'table.material-grid tbody tr',
+    saveButton: 'button:has-text("保存")',
+  },
+
+  // Common Elements
+  common: {
+    successMessage: '.message.success',
+    errorMessage: '.message.error',
+    confirmDialog: '.confirm-dialog',
+    confirmButton: 'button:has-text("确定")',
+    cancelButton: 'button:has-text("取消")',
+  },
+};