feat: implement material validation UI in CleanerPage

New Features:
- Material validation from database (full table or filtered by ProductionID)
- Checkbox selection for materials to delete with auto-select for marked items
- Manager-based filtering (Admin only)
- Two-phase deletion: confirm (mark in DB) + execute (delete from ERP)
- Export results to CSV
- Hide/show checked items feature (User mode)
- Share Production IDs between ExtractorPage and CleanerPage
- Persist page state using sessionStorage

Bug Fixes:
- Fix MySQL query rowCount for INSERT/UPDATE/DELETE operations
- Add AUTO_INCREMENT to MaterialsToBeDeleted.ID (preserved 43 records)
- Add UNIQUE constraint on MaterialsToBeDeleted.MaterialCode

Files Added:
- src/main/ipc/validation-handler.ts
- src/main/types/validation.types.ts
- src/main/services/database/materials-to-be-deleted-dao.ts
- src/main/services/database/discrete-material-plan-dao.ts

Files Modified:
- src/renderer/src/pages/CleanerPage.tsx (complete rewrite)
- src/renderer/src/pages/ExtractorPage.tsx
- src/renderer/src/App.tsx (add navigation tabs)
- src/main/services/database/mysql.ts
- src/preload/index.ts + index.d.ts

src/main/types/validation.types.ts

@@ -0,0 +1,105 @@
+/**
+ * Validation IPC API type definitions
+ */
+
+/**
+ * Material validation result
+ */
+export interface ValidationResult {
+  materialName: string
+  materialCode: string
+  specification: string
+  model: string
+  managerName: string
+  isMarkedForDeletion: boolean
+  matchedTypeKeyword?: string
+}
+
+/**
+ * Material validation request
+ */
+export interface ValidationRequest {
+  /** Validation mode: 'database_full' or 'database_filtered' */
+  mode: 'database_full' | 'database_filtered'
+  /** Production ID file path (for database_filtered mode) */
+  productionIdFile?: string
+  /** Use shared Production IDs from extractor page */
+  useSharedProductionIds?: boolean
+}
+
+/**
+ * Validation response
+ */
+export interface ValidationResponse {
+  success: boolean
+  results?: ValidationResult[]
+  error?: string
+  stats?: {
+    totalRecords: number
+    matchedCount: number
+    markedCount: number
+  }
+}
+
+/**
+ * Material upsert request
+ */
+export interface MaterialUpsertRequest {
+  materialCode: string
+  managerName: string
+}
+
+/**
+ * Material upsert batch request
+ */
+export interface MaterialUpsertBatchRequest {
+  materials: { materialCode: string; managerName: string }[]
+}
+
+/**
+ * Material delete request
+ */
+export interface MaterialDeleteRequest {
+  materialCodes: string[]
+}
+
+/**
+ * Material query by manager request
+ */
+export interface MaterialQueryByManagerRequest {
+  managerName: string
+}
+
+/**
+ * Material operations response
+ */
+export interface MaterialOperationResponse {
+  success: boolean
+  count?: number
+  stats?: {
+    total: number
+    success: number
+    failed: number
+  }
+  error?: string
+}
+
+/**
+ * Manager filter response
+ */
+export interface ManagerFilterResponse {
+  managers: string[]
+  materials?: MaterialRecordSummary[]
+}
+
+/**
+ * Material record summary
+ */
+export interface MaterialRecordSummary {
+  materialCode: string
+  materialName: string
+  specification: string
+  model: string
+  managerName: string
+  isMarked: boolean
+}