feat: implement settings interface with user permission control

New Features:
- Add SettingsPage component with Admin/User view differentiation
- Create ConfigManager service for .env file management
- Add IPC handlers for settings CRUD operations
- Implement connection testing for ERP and database
- Add settings navigation to main app

Files Created:
- src/main/types/settings.types.ts - Type definitions
- src/main/services/config/config-manager.ts - Config service
- src/main/ipc/settings-handler.ts - IPC handlers
- src/renderer/src/pages/SettingsPage.tsx - React UI component

Files Modified:
- src/main/ipc/index.ts - Register settings handlers
- src/preload/index.ts - Expose settings API
- src/preload/index.d.ts - Add SettingsAPI type
- src/renderer/src/App.tsx - Add settings navigation

Co-Authored-By: Claude (qwen3.5-plus) <noreply@anthropic.com>

src/preload/index.d.ts

@@ -9,6 +9,7 @@ import type {
   CurrentUserResponse
 } from '../main/ipc/auth-handler'
 import type { ValidationRequest, ValidationResponse } from '../main/types/validation.types'
+import type { SettingsData, UserType, ConnectionTestResult, SaveSettingsResult } from '../main/types/settings.types'
 
 /**
  * Order number resolver API
@@ -88,6 +89,16 @@ export interface ValidationAPI {
    * Get shared Production IDs
    */
   getSharedProductionIds: () => Promise<{ productionIds: string[] }>
+  /**
+   * Get cleaner data (order numbers from shared Production IDs + material codes from MaterialsToBeDeleted)
+   * Filters materials by current user (admin sees all, regular users see only their own)
+   */
+  getCleanerData: () => Promise<{
+    success: boolean
+    orderNumbers?: string[]
+    materialCodes?: string[]
+    error?: string
+  }>
 }
 
 /**
@@ -131,6 +142,37 @@ export interface MaterialsAPI {
   getStatistics: () => Promise<{ stats: unknown }>
 }
 
+/**
+ * Settings API
+ */
+export interface SettingsAPI {
+  /**
+   * Get current user type
+   */
+  getUserType: () => Promise<UserType>
+  /**
+   * Get settings (filtered by user type)
+   */
+  getSettings: () => Promise<SettingsData>
+  /**
+   * Save settings
+   * @param settings - Settings data to save
+   */
+  saveSettings: (settings: SettingsData) => Promise<SaveSettingsResult>
+  /**
+   * Reset to defaults (Admin only)
+   */
+  resetDefaults: () => Promise<SaveSettingsResult>
+  /**
+   * Test ERP connection
+   */
+  testErpConnection: () => Promise<ConnectionTestResult>
+  /**
+   * Test database connection
+   */
+  testDbConnection: () => Promise<ConnectionTestResult>
+}
+
 declare global {
   interface Window {
     electron: {
@@ -157,6 +199,7 @@ declare global {
       auth: AuthAPI
       validation: ValidationAPI
       materials: MaterialsAPI
+      settings: SettingsAPI
     }
     api: unknown
   }

src/preload/index.ts

@@ -7,6 +7,7 @@ import type { ResolverInput } from '../main/ipc/resolver-handler'
 import type { LoginRequest } from '../main/ipc/auth-handler'
 import type { UserInfo } from '../main/types/user.types'
 import type { ValidationRequest } from '../main/types/validation.types'
+import type { SettingsData } from '../main/types/settings.types'
 
 // Custom APIs for renderer
 const api = {
@@ -70,7 +71,9 @@ const api = {
     setSharedProductionIds: (productionIds: string[]) =>
       ipcRenderer.invoke('validation:setSharedProductionIds', productionIds),
     getSharedProductionIds: () =>
-      ipcRenderer.invoke('validation:getSharedProductionIds')
+      ipcRenderer.invoke('validation:getSharedProductionIds'),
+    getCleanerData: () =>
+      ipcRenderer.invoke('validation:getCleanerData')
   },
 
   // Materials service
@@ -84,6 +87,16 @@ const api = {
       ipcRenderer.invoke('materials:getByManager', managerName),
     getAll: () => ipcRenderer.invoke('materials:getAll'),
     getStatistics: () => ipcRenderer.invoke('materials:getStatistics')
+  },
+
+  // Settings service
+  settings: {
+    getUserType: () => ipcRenderer.invoke('settings:getUserType'),
+    getSettings: () => ipcRenderer.invoke('settings:getSettings'),
+    saveSettings: (settings: SettingsData) => ipcRenderer.invoke('settings:saveSettings', settings),
+    resetDefaults: () => ipcRenderer.invoke('settings:resetDefaults'),
+    testErpConnection: () => ipcRenderer.invoke('settings:testErpConnection'),
+    testDbConnection: () => ipcRenderer.invoke('settings:testDbConnection')
   }
 } as const