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/services/database/mysql.ts

@@ -78,17 +78,27 @@ export class MySqlService {
     }
 
     try {
-      const [rows, fields] = await this.connection.execute(sql, params)
+      const [result, fields] = await this.connection.execute(sql, params)
 
-      // Convert rows to plain objects and extract column names
-      const columns = fields.map((field) => field.name)
-      const rowCount = Array.isArray(rows) ? rows.length : 0
+      // Convert to plain objects and extract column names
+      const columns = Array.isArray(fields) ? fields.map((field) => field.name) : []
 
-      // Type assertion for rows - mysql2 returns different types based on query
-      const typedRows = Array.isArray(rows) ? (rows as Record<string, unknown>[]) : []
+      // Handle different result types
+      let rows: Record<string, unknown>[] = []
+      let rowCount = 0
+
+      if (Array.isArray(result)) {
+        // SELECT query - result is an array of rows
+        rows = result as Record<string, unknown>[]
+        rowCount = rows.length
+      } else if (typeof result === 'object' && result !== null) {
+        // INSERT/UPDATE/DELETE query - result is OkPacket
+        const okPacket = result as any
+        rowCount = okPacket.affectedRows || okPacket.changedRows || 0
+      }
 
       return {
-        rows: typedRows,
+        rows,
         columns,
         rowCount
       }