diff --git a/src/preload/api/auth.ts b/src/preload/api/auth.ts
new file mode 100644
index 0000000..eaf99d7
--- /dev/null
+++ b/src/preload/api/auth.ts
@@ -0,0 +1,15 @@
+import type { LoginRequest } from '../../main/types/auth-ipc.types'
+import type { UserInfo } from '../../main/types/user.types'
+import { IPC_CHANNELS } from '../../shared/ipc-channels'
+import { invokeIpc } from '../lib/ipc'
+
+export const authApi = {
+  getComputerName: () => invokeIpc(IPC_CHANNELS.AUTH_GET_COMPUTER_NAME),
+  silentLogin: () => invokeIpc(IPC_CHANNELS.AUTH_SILENT_LOGIN),
+  login: (request: LoginRequest) => invokeIpc(IPC_CHANNELS.AUTH_LOGIN, request),
+  logout: () => invokeIpc(IPC_CHANNELS.AUTH_LOGOUT),
+  getCurrentUser: () => invokeIpc(IPC_CHANNELS.AUTH_GET_CURRENT_USER),
+  getAllUsers: () => invokeIpc(IPC_CHANNELS.AUTH_GET_ALL_USERS),
+  switchUser: (userInfo: UserInfo) => invokeIpc(IPC_CHANNELS.AUTH_SWITCH_USER, userInfo),
+  isAdmin: () => invokeIpc(IPC_CHANNELS.AUTH_IS_ADMIN)
+} as const
diff --git a/src/preload/api/cleaner.ts b/src/preload/api/cleaner.ts
new file mode 100644
index 0000000..3a26226
--- /dev/null
+++ b/src/preload/api/cleaner.ts
@@ -0,0 +1,19 @@
+import type {
+  CleanerInput,
+  CleanerProgress,
+  ExportResultItem
+} from '../../main/types/cleaner.types'
+import { IPC_CHANNELS } from '../../shared/ipc-channels'
+import { invokeIpc, ipcRenderer } from '../lib/ipc'
+
+export const cleanerApi = {
+  runCleaner: (input: CleanerInput) => invokeIpc(IPC_CHANNELS.CLEANER_RUN, input),
+  exportResults: (items: ExportResultItem[]) =>
+    invokeIpc(IPC_CHANNELS.CLEANER_EXPORT_RESULTS, items),
+  onProgress: (callback: (data: CleanerProgress) => void) => {
+    const subscription = (_event: Electron.IpcRendererEvent, data: CleanerProgress) =>
+      callback(data)
+    ipcRenderer.on(IPC_CHANNELS.CLEANER_PROGRESS, subscription)
+    return () => ipcRenderer.removeListener(IPC_CHANNELS.CLEANER_PROGRESS, subscription)
+  }
+} as const
diff --git a/src/preload/api/database.ts b/src/preload/api/database.ts
new file mode 100644
index 0000000..d65afb8
--- /dev/null
+++ b/src/preload/api/database.ts
@@ -0,0 +1,17 @@
+import type { MySqlConfig, SqlServerConfig } from '../../main/types/ipc-api.types'
+import { IPC_CHANNELS } from '../../shared/ipc-channels'
+import { invokeIpc } from '../lib/ipc'
+
+export const databaseApi = {
+  connectMySql: (config: MySqlConfig) => invokeIpc(IPC_CHANNELS.DATABASE_MYSQL_CONNECT, config),
+  disconnectMySql: () => invokeIpc(IPC_CHANNELS.DATABASE_MYSQL_DISCONNECT),
+  isMySqlConnected: () => invokeIpc(IPC_CHANNELS.DATABASE_MYSQL_IS_CONNECTED),
+  queryMySql: (sql: string, params?: unknown[]) =>
+    invokeIpc(IPC_CHANNELS.DATABASE_MYSQL_QUERY, sql, params),
+  connectSqlServer: (config: SqlServerConfig) =>
+    invokeIpc(IPC_CHANNELS.DATABASE_SQLSERVER_CONNECT, config),
+  disconnectSqlServer: () => invokeIpc(IPC_CHANNELS.DATABASE_SQLSERVER_DISCONNECT),
+  isSqlServerConnected: () => invokeIpc(IPC_CHANNELS.DATABASE_SQLSERVER_IS_CONNECTED),
+  querySqlServer: (sql: string, params?: Record<string, unknown>) =>
+    invokeIpc(IPC_CHANNELS.DATABASE_SQLSERVER_QUERY, sql, params)
+} as const
diff --git a/src/preload/api/extractor.ts b/src/preload/api/extractor.ts
new file mode 100644
index 0000000..a370771
--- /dev/null
+++ b/src/preload/api/extractor.ts
@@ -0,0 +1,21 @@
+import type { ExtractorInput, ExtractionProgress } from '../../main/types/extractor.types'
+import { IPC_CHANNELS } from '../../shared/ipc-channels'
+import { invokeIpc, ipcRenderer } from '../lib/ipc'
+
+export const extractorApi = {
+  runExtractor: (input: ExtractorInput) => invokeIpc(IPC_CHANNELS.EXTRACTOR_RUN, input),
+  onProgress: (callback: (data: ExtractionProgress) => void) => {
+    const subscription = (_event: Electron.IpcRendererEvent, data: ExtractionProgress) =>
+      callback(data)
+    ipcRenderer.on(IPC_CHANNELS.EXTRACTOR_PROGRESS, subscription)
+    return () => ipcRenderer.removeListener(IPC_CHANNELS.EXTRACTOR_PROGRESS, subscription)
+  },
+  onLog: (callback: (data: { level: string; message: string }) => void) => {
+    const subscription = (
+      _event: Electron.IpcRendererEvent,
+      data: { level: string; message: string }
+    ) => callback(data)
+    ipcRenderer.on(IPC_CHANNELS.EXTRACTOR_LOG, subscription)
+    return () => ipcRenderer.removeListener(IPC_CHANNELS.EXTRACTOR_LOG, subscription)
+  }
+} as const
diff --git a/src/preload/api/file.ts b/src/preload/api/file.ts
new file mode 100644
index 0000000..c9eb94d
--- /dev/null
+++ b/src/preload/api/file.ts
@@ -0,0 +1,11 @@
+import { IPC_CHANNELS } from '../../shared/ipc-channels'
+import { invokeIpc } from '../lib/ipc'
+
+export const fileApi = {
+  readFile: (filePath: string) => invokeIpc(IPC_CHANNELS.FILE_READ, filePath),
+  writeFile: (filePath: string, content: string) =>
+    invokeIpc(IPC_CHANNELS.FILE_WRITE, filePath, content),
+  fileExists: (filePath: string) => invokeIpc(IPC_CHANNELS.FILE_EXISTS, filePath),
+  listFiles: (dirPath: string) => invokeIpc(IPC_CHANNELS.FILE_LIST, dirPath),
+  openPath: (filePath: string) => invokeIpc(IPC_CHANNELS.FILE_OPEN_PATH, filePath)
+} as const
diff --git a/src/preload/api/index.ts b/src/preload/api/index.ts
new file mode 100644
index 0000000..e1c835a
--- /dev/null
+++ b/src/preload/api/index.ts
@@ -0,0 +1,39 @@
+import { processApi } from './process'
+import { fileApi } from './file'
+import { extractorApi } from './extractor'
+import { cleanerApi } from './cleaner'
+import { resolverApi } from './resolver'
+import { authApi } from './auth'
+import { databaseApi } from './database'
+import { validationApi } from './validation'
+import {
+  configApi,
+  materialTypeApi,
+  materialsApi,
+  reportApi,
+  settingsApi,
+  updateApi,
+  userErpConfigApi
+} from './materials'
+import { loggerApi } from './logger'
+
+export const api = {
+  process: processApi,
+  file: fileApi,
+  extractor: extractorApi,
+  cleaner: cleanerApi,
+  resolver: resolverApi,
+  auth: authApi,
+  database: databaseApi,
+  validation: validationApi,
+  materials: materialsApi,
+  settings: settingsApi,
+  materialType: materialTypeApi,
+  userErpConfig: userErpConfigApi,
+  config: configApi,
+  logger: loggerApi,
+  report: reportApi,
+  update: updateApi
+} as const
+
+export type ElectronApi = typeof api
diff --git a/src/preload/api/logger.ts b/src/preload/api/logger.ts
new file mode 100644
index 0000000..03ecd6d
--- /dev/null
+++ b/src/preload/api/logger.ts
@@ -0,0 +1,14 @@
+import type { LogLevel } from '../../shared/ipc-channels'
+import { IPC_CHANNELS } from '../../shared/ipc-channels'
+import { ipcRenderer } from '../lib/ipc'
+
+export const loggerApi = {
+  log: (level: LogLevel, message: string, context?: Record<string, unknown>): void => {
+    ipcRenderer.send(IPC_CHANNELS.LOGGER_FORWARD, {
+      level,
+      message,
+      context,
+      timestamp: Date.now()
+    })
+  }
+} as const
diff --git a/src/preload/api/materials.ts b/src/preload/api/materials.ts
new file mode 100644
index 0000000..db0ca19
--- /dev/null
+++ b/src/preload/api/materials.ts
@@ -0,0 +1,91 @@
+import type {
+  MaterialTypeBatchRequest,
+  MaterialTypeRecord
+} from '../../main/types/validation.types'
+import { IPC_CHANNELS } from '../../shared/ipc-channels'
+import type { CleanerConfig } from '../../main/types/config.schema'
+import type {
+  DownloadReleaseRequest,
+  UpdateDialogCatalog,
+  UpdateStatus
+} from '../../main/types/update.types'
+import { invokeIpc, ipcRenderer } from '../lib/ipc'
+
+type ErpSettingsPayload = {
+  erp?: {
+    username?: string
+    password?: string
+  }
+}
+
+export const materialsApi = {
+  upsertBatch: (materials: { materialCode: string; managerName: string }[]) =>
+    invokeIpc(IPC_CHANNELS.MATERIALS_UPSERT_BATCH, { materials }),
+  delete: (materialCodes: string[]) => invokeIpc(IPC_CHANNELS.MATERIALS_DELETE, { materialCodes }),
+  getManagers: () => invokeIpc(IPC_CHANNELS.MATERIALS_GET_MANAGERS),
+  getByManager: (managerName: string) =>
+    invokeIpc(IPC_CHANNELS.MATERIALS_GET_BY_MANAGER, managerName),
+  getAll: () => invokeIpc(IPC_CHANNELS.MATERIALS_GET_ALL),
+  getStatistics: () => invokeIpc(IPC_CHANNELS.MATERIALS_GET_STATISTICS),
+  updateManager: (materialCode: string, managerName: string) =>
+    invokeIpc(IPC_CHANNELS.MATERIALS_UPDATE_MANAGER, { materialCode, managerName })
+} as const
+
+export const settingsApi = {
+  getUserType: () => invokeIpc(IPC_CHANNELS.SETTINGS_GET_USER_TYPE),
+  getSettings: () => invokeIpc(IPC_CHANNELS.SETTINGS_GET_SETTINGS),
+  saveSettings: (settings: ErpSettingsPayload) =>
+    invokeIpc(IPC_CHANNELS.SETTINGS_SAVE_SETTINGS, settings),
+  resetDefaults: () => invokeIpc(IPC_CHANNELS.SETTINGS_RESET_DEFAULTS),
+  testDbConnection: () => invokeIpc(IPC_CHANNELS.SETTINGS_TEST_DB_CONNECTION)
+} as const
+
+export const materialTypeApi = {
+  getAll: () => invokeIpc<MaterialTypeRecord[]>(IPC_CHANNELS.MATERIAL_TYPE_GET_ALL),
+  getByManager: (managerName: string) =>
+    invokeIpc<MaterialTypeRecord[]>(IPC_CHANNELS.MATERIAL_TYPE_GET_BY_MANAGER, managerName),
+  getManagers: () => invokeIpc<string[]>(IPC_CHANNELS.MATERIAL_TYPE_GET_MANAGERS),
+  upsert: (materialName: string, managerName: string) =>
+    invokeIpc(IPC_CHANNELS.MATERIAL_TYPE_UPSERT, { materialName, managerName }),
+  delete: (materialName: string, managerName: string) =>
+    invokeIpc(IPC_CHANNELS.MATERIAL_TYPE_DELETE, { materialName, managerName }),
+  upsertBatch: (request: MaterialTypeBatchRequest) =>
+    invokeIpc(IPC_CHANNELS.MATERIAL_TYPE_UPSERT_BATCH, request)
+} as const
+
+export const userErpConfigApi = {
+  getCurrent: () => invokeIpc(IPC_CHANNELS.USER_ERP_CONFIG_GET_CURRENT),
+  update: (config: { url: string; username: string; password: string }) =>
+    invokeIpc(IPC_CHANNELS.USER_ERP_CONFIG_UPDATE, config),
+  testConnection: (config: { url: string; username: string; password: string }) =>
+    invokeIpc(IPC_CHANNELS.USER_ERP_CONFIG_TEST_CONNECTION, config),
+  getAll: () => invokeIpc(IPC_CHANNELS.USER_ERP_CONFIG_GET_ALL)
+} as const
+
+export const configApi = {
+  getCleaner: () => invokeIpc<CleanerConfig>(IPC_CHANNELS.CONFIG_GET_CLEANER),
+  updateCleaner: (updates: Partial<CleanerConfig>) =>
+    invokeIpc<CleanerConfig>(IPC_CHANNELS.CONFIG_UPDATE_CLEANER, updates)
+} as const
+
+export const reportApi = {
+  listAll: () => invokeIpc(IPC_CHANNELS.REPORT_LIST_ALL),
+  listByUser: (username: string) => invokeIpc(IPC_CHANNELS.REPORT_LIST_BY_USER, username),
+  download: (key: string) => invokeIpc(IPC_CHANNELS.REPORT_DOWNLOAD, key)
+} as const
+
+export const updateApi = {
+  getStatus: () => invokeIpc<UpdateStatus>(IPC_CHANNELS.UPDATE_GET_STATUS),
+  checkNow: () => invokeIpc<UpdateStatus>(IPC_CHANNELS.UPDATE_CHECK_NOW),
+  getCatalog: () => invokeIpc<UpdateDialogCatalog>(IPC_CHANNELS.UPDATE_GET_CATALOG),
+  getChangelog: (release: DownloadReleaseRequest) =>
+    invokeIpc<string>(IPC_CHANNELS.UPDATE_GET_CHANGELOG, release),
+  downloadRelease: (release: DownloadReleaseRequest) =>
+    invokeIpc<UpdateStatus>(IPC_CHANNELS.UPDATE_DOWNLOAD_RELEASE, release),
+  installDownloaded: () => invokeIpc<void>(IPC_CHANNELS.UPDATE_INSTALL_DOWNLOADED),
+  onStatusChanged: (callback: (data: UpdateStatus) => void) => {
+    const subscription = (_event: Electron.IpcRendererEvent, data: UpdateStatus) => callback(data)
+    ipcRenderer.on(IPC_CHANNELS.UPDATE_STATUS_CHANGED, subscription)
+    return () => ipcRenderer.removeListener(IPC_CHANNELS.UPDATE_STATUS_CHANGED, subscription)
+  }
+} as const
diff --git a/src/preload/api/process.ts b/src/preload/api/process.ts
new file mode 100644
index 0000000..b7fa6fd
--- /dev/null
+++ b/src/preload/api/process.ts
@@ -0,0 +1,7 @@
+export const processApi = {
+  versions: {
+    electron: process.versions.electron,
+    chrome: process.versions.chrome,
+    node: process.versions.node
+  }
+} as const
diff --git a/src/preload/api/resolver.ts b/src/preload/api/resolver.ts
new file mode 100644
index 0000000..7555f1a
--- /dev/null
+++ b/src/preload/api/resolver.ts
@@ -0,0 +1,8 @@
+import type { ResolverInput } from '../../main/types/resolver-ipc.types'
+import { IPC_CHANNELS } from '../../shared/ipc-channels'
+import { invokeIpc } from '../lib/ipc'
+
+export const resolverApi = {
+  resolve: (input: ResolverInput) => invokeIpc(IPC_CHANNELS.RESOLVER_RESOLVE, input),
+  validateFormat: (inputs: string[]) => invokeIpc(IPC_CHANNELS.RESOLVER_VALIDATE_FORMAT, inputs)
+} as const
diff --git a/src/preload/api/validation.ts b/src/preload/api/validation.ts
new file mode 100644
index 0000000..fda5b39
--- /dev/null
+++ b/src/preload/api/validation.ts
@@ -0,0 +1,12 @@
+import type { ValidationRequest } from '../../main/types/validation.types'
+import { IPC_CHANNELS } from '../../shared/ipc-channels'
+import { invokeIpc } from '../lib/ipc'
+
+export const validationApi = {
+  validate: (request: ValidationRequest) => invokeIpc(IPC_CHANNELS.VALIDATION_VALIDATE, request),
+  setSharedProductionIds: (productionIds: string[]) =>
+    invokeIpc(IPC_CHANNELS.VALIDATION_SET_SHARED_PRODUCTION_IDS, productionIds),
+  getSharedProductionIds: () => invokeIpc(IPC_CHANNELS.VALIDATION_GET_SHARED_PRODUCTION_IDS),
+  clearSharedProductionIds: () => invokeIpc(IPC_CHANNELS.VALIDATION_CLEAR_SHARED_PRODUCTION_IDS),
+  getCleanerData: () => invokeIpc(IPC_CHANNELS.VALIDATION_GET_CLEANER_DATA)
+} as const
diff --git a/src/preload/index.ts b/src/preload/index.ts
index e0bc5b3..026ac5e 100644
--- a/src/preload/index.ts
+++ b/src/preload/index.ts
@@ -1,245 +1,5 @@
-import { contextBridge, ipcRenderer } from 'electron'
-import type { MySqlConfig, SqlServerConfig } from '../main/types/ipc-api.types'
-import type { ExtractorInput, ExtractionProgress } from '../main/types/extractor.types'
-import type { CleanerInput, CleanerProgress, ExportResultItem } from '../main/types/cleaner.types'
-import type { ResolverInput } from '../main/types/resolver-ipc.types'
-import type { LoginRequest } from '../main/types/auth-ipc.types'
-import type { UserInfo } from '../main/types/user.types'
-import type {
-  ValidationRequest,
-  MaterialTypeRecord,
-  MaterialTypeBatchRequest
-} from '../main/types/validation.types'
-import type { IpcResult } from '../main/types/ipc.types'
-import { IPC_CHANNELS, type LogLevel } from '../shared/ipc-channels'
-import type { CleanerConfig } from '../main/types/config.schema'
-import type { DownloadReleaseRequest, UpdateStatus } from '../main/types/update.types'
-import type { UpdateDialogCatalog } from '../main/types/update.types'
-
-type ErpSettingsPayload = {
-  erp?: {
-    username?: string
-    password?: string
-  }
-}
-
-const processApi = {
-  versions: {
-    electron: process.versions.electron,
-    chrome: process.versions.chrome,
-    node: process.versions.node
-  }
-}
-
-function invokeIpc<T = unknown>(channel: string, ...args: unknown[]): Promise<IpcResult<T>> {
-  return ipcRenderer.invoke(channel, ...args).then((result: unknown) => {
-    if (result && typeof result === 'object' && 'success' in (result as Record<string, unknown>)) {
-      const typed = result as Record<string, unknown>
-      const hasIpcShape = 'data' in typed || 'code' in typed || 'error' in typed
-
-      if (hasIpcShape) {
-        return typed as unknown as IpcResult<T>
-      }
-
-      if (typed.success === true) {
-        return { success: true, data: result as T }
-      }
-
-      return {
-        success: false,
-        error: typeof typed.error === 'string' ? typed.error : 'IPC operation failed'
-      }
-    }
-
-    return { success: true, data: result as T }
-  })
-}
-
-const api = {
-  process: processApi,
-
-  file: {
-    readFile: (filePath: string) => invokeIpc(IPC_CHANNELS.FILE_READ, filePath),
-    writeFile: (filePath: string, content: string) =>
-      invokeIpc(IPC_CHANNELS.FILE_WRITE, filePath, content),
-    fileExists: (filePath: string) => invokeIpc(IPC_CHANNELS.FILE_EXISTS, filePath),
-    listFiles: (dirPath: string) => invokeIpc(IPC_CHANNELS.FILE_LIST, dirPath),
-    openPath: (filePath: string) => invokeIpc(IPC_CHANNELS.FILE_OPEN_PATH, filePath)
-  },
-
-  extractor: {
-    runExtractor: (input: ExtractorInput): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.EXTRACTOR_RUN, input),
-    onProgress: (callback: (data: ExtractionProgress) => void) => {
-      const subscription = (_event: Electron.IpcRendererEvent, data: ExtractionProgress) =>
-        callback(data)
-      ipcRenderer.on(IPC_CHANNELS.EXTRACTOR_PROGRESS, subscription)
-      return () => ipcRenderer.removeListener(IPC_CHANNELS.EXTRACTOR_PROGRESS, subscription)
-    },
-    onLog: (callback: (data: { level: string; message: string }) => void) => {
-      const subscription = (
-        _event: Electron.IpcRendererEvent,
-        data: { level: string; message: string }
-      ) => callback(data)
-      ipcRenderer.on(IPC_CHANNELS.EXTRACTOR_LOG, subscription)
-      return () => ipcRenderer.removeListener(IPC_CHANNELS.EXTRACTOR_LOG, subscription)
-    }
-  },
-
-  cleaner: {
-    runCleaner: (input: CleanerInput): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.CLEANER_RUN, input),
-    exportResults: (items: ExportResultItem[]): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.CLEANER_EXPORT_RESULTS, items),
-    onProgress: (callback: (data: CleanerProgress) => void) => {
-      const subscription = (_event: Electron.IpcRendererEvent, data: CleanerProgress) =>
-        callback(data)
-      ipcRenderer.on(IPC_CHANNELS.CLEANER_PROGRESS, subscription)
-      return () => ipcRenderer.removeListener(IPC_CHANNELS.CLEANER_PROGRESS, subscription)
-    }
-  },
-
-  resolver: {
-    resolve: (input: ResolverInput): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.RESOLVER_RESOLVE, input),
-    validateFormat: (inputs: string[]): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.RESOLVER_VALIDATE_FORMAT, inputs)
-  },
-
-  auth: {
-    getComputerName: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.AUTH_GET_COMPUTER_NAME),
-    silentLogin: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.AUTH_SILENT_LOGIN),
-    login: (request: LoginRequest): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.AUTH_LOGIN, request),
-    logout: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.AUTH_LOGOUT),
-    getCurrentUser: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.AUTH_GET_CURRENT_USER),
-    getAllUsers: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.AUTH_GET_ALL_USERS),
-    switchUser: (userInfo: UserInfo): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.AUTH_SWITCH_USER, userInfo),
-    isAdmin: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.AUTH_IS_ADMIN)
-  },
-
-  database: {
-    connectMySql: (config: MySqlConfig): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.DATABASE_MYSQL_CONNECT, config),
-    disconnectMySql: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.DATABASE_MYSQL_DISCONNECT),
-    isMySqlConnected: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.DATABASE_MYSQL_IS_CONNECTED),
-    queryMySql: (sql: string, params?: any[]): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.DATABASE_MYSQL_QUERY, sql, params),
-    connectSqlServer: (config: SqlServerConfig): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.DATABASE_SQLSERVER_CONNECT, config),
-    disconnectSqlServer: (): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.DATABASE_SQLSERVER_DISCONNECT),
-    isSqlServerConnected: (): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.DATABASE_SQLSERVER_IS_CONNECTED),
-    querySqlServer: (sql: string, params?: Record<string, unknown>): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.DATABASE_SQLSERVER_QUERY, sql, params)
-  },
-
-  validation: {
-    validate: (request: ValidationRequest): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.VALIDATION_VALIDATE, request),
-    setSharedProductionIds: (productionIds: string[]): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.VALIDATION_SET_SHARED_PRODUCTION_IDS, productionIds),
-    getSharedProductionIds: (): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.VALIDATION_GET_SHARED_PRODUCTION_IDS),
-    clearSharedProductionIds: (): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.VALIDATION_CLEAR_SHARED_PRODUCTION_IDS),
-    getCleanerData: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.VALIDATION_GET_CLEANER_DATA)
-  },
-
-  materials: {
-    upsertBatch: (materials: { materialCode: string; managerName: string }[]): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.MATERIALS_UPSERT_BATCH, { materials }),
-    delete: (materialCodes: string[]): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.MATERIALS_DELETE, { materialCodes }),
-    getManagers: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.MATERIALS_GET_MANAGERS),
-    getByManager: (managerName: string): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.MATERIALS_GET_BY_MANAGER, managerName),
-    getAll: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.MATERIALS_GET_ALL),
-    getStatistics: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.MATERIALS_GET_STATISTICS),
-    updateManager: (materialCode: string, managerName: string): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.MATERIALS_UPDATE_MANAGER, { materialCode, managerName })
-  },
-
-  settings: {
-    getUserType: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.SETTINGS_GET_USER_TYPE),
-    getSettings: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.SETTINGS_GET_SETTINGS),
-    saveSettings: (settings: ErpSettingsPayload): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.SETTINGS_SAVE_SETTINGS, settings),
-    resetDefaults: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.SETTINGS_RESET_DEFAULTS),
-    testDbConnection: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.SETTINGS_TEST_DB_CONNECTION)
-  },
-
-  materialType: {
-    getAll: (): Promise<IpcResult<MaterialTypeRecord[]>> =>
-      invokeIpc(IPC_CHANNELS.MATERIAL_TYPE_GET_ALL),
-    getByManager: (managerName: string): Promise<IpcResult<MaterialTypeRecord[]>> =>
-      invokeIpc(IPC_CHANNELS.MATERIAL_TYPE_GET_BY_MANAGER, managerName),
-    getManagers: (): Promise<IpcResult<string[]>> =>
-      invokeIpc(IPC_CHANNELS.MATERIAL_TYPE_GET_MANAGERS),
-    upsert: (materialName: string, managerName: string): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.MATERIAL_TYPE_UPSERT, { materialName, managerName }),
-    delete: (materialName: string, managerName: string): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.MATERIAL_TYPE_DELETE, { materialName, managerName }),
-    upsertBatch: (request: MaterialTypeBatchRequest): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.MATERIAL_TYPE_UPSERT_BATCH, request)
-  },
-
-  userErpConfig: {
-    getCurrent: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.USER_ERP_CONFIG_GET_CURRENT),
-    update: (config: { url: string; username: string; password: string }): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.USER_ERP_CONFIG_UPDATE, config),
-    testConnection: (config: {
-      url: string
-      username: string
-      password: string
-    }): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.USER_ERP_CONFIG_TEST_CONNECTION, config),
-    getAll: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.USER_ERP_CONFIG_GET_ALL)
-  },
-
-  config: {
-    getCleaner: (): Promise<IpcResult<CleanerConfig>> => invokeIpc(IPC_CHANNELS.CONFIG_GET_CLEANER),
-    updateCleaner: (updates: Partial<CleanerConfig>): Promise<IpcResult<CleanerConfig>> =>
-      invokeIpc(IPC_CHANNELS.CONFIG_UPDATE_CLEANER, updates)
-  },
-
-  logger: {
-    log: (level: LogLevel, message: string, context?: Record<string, unknown>): void => {
-      ipcRenderer.send(IPC_CHANNELS.LOGGER_FORWARD, {
-        level,
-        message,
-        context,
-        timestamp: Date.now()
-      })
-    }
-  },
-
-  report: {
-    listAll: (): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.REPORT_LIST_ALL),
-    listByUser: (username: string): Promise<IpcResult> =>
-      invokeIpc(IPC_CHANNELS.REPORT_LIST_BY_USER, username),
-    download: (key: string): Promise<IpcResult> => invokeIpc(IPC_CHANNELS.REPORT_DOWNLOAD, key)
-  },
-
-  update: {
-    getStatus: (): Promise<IpcResult<UpdateStatus>> => invokeIpc(IPC_CHANNELS.UPDATE_GET_STATUS),
-    checkNow: (): Promise<IpcResult<UpdateStatus>> => invokeIpc(IPC_CHANNELS.UPDATE_CHECK_NOW),
-    getCatalog: (): Promise<IpcResult<UpdateDialogCatalog>> =>
-      invokeIpc(IPC_CHANNELS.UPDATE_GET_CATALOG),
-    getChangelog: (release: DownloadReleaseRequest): Promise<IpcResult<string>> =>
-      invokeIpc(IPC_CHANNELS.UPDATE_GET_CHANGELOG, release),
-    downloadRelease: (release: DownloadReleaseRequest): Promise<IpcResult<UpdateStatus>> =>
-      invokeIpc(IPC_CHANNELS.UPDATE_DOWNLOAD_RELEASE, release),
-    installDownloaded: (): Promise<IpcResult<void>> =>
-      invokeIpc(IPC_CHANNELS.UPDATE_INSTALL_DOWNLOADED),
-    onStatusChanged: (callback: (data: UpdateStatus) => void) => {
-      const subscription = (_event: Electron.IpcRendererEvent, data: UpdateStatus) => callback(data)
-      ipcRenderer.on(IPC_CHANNELS.UPDATE_STATUS_CHANGED, subscription)
-      return () => ipcRenderer.removeListener(IPC_CHANNELS.UPDATE_STATUS_CHANGED, subscription)
-    }
-  }
-} as const
+import { contextBridge } from 'electron'
+import { api } from './api'
 
 if (process.contextIsolated) {
   try {
diff --git a/src/preload/lib/ipc.ts b/src/preload/lib/ipc.ts
new file mode 100644
index 0000000..e5e199a
--- /dev/null
+++ b/src/preload/lib/ipc.ts
@@ -0,0 +1,28 @@
+import { ipcRenderer } from 'electron'
+import type { IpcResult } from '../../main/types/ipc.types'
+
+export function invokeIpc<T = unknown>(channel: string, ...args: unknown[]): Promise<IpcResult<T>> {
+  return ipcRenderer.invoke(channel, ...args).then((result: unknown) => {
+    if (result && typeof result === 'object' && 'success' in (result as Record<string, unknown>)) {
+      const typed = result as Record<string, unknown>
+      const hasIpcShape = 'data' in typed || 'code' in typed || 'error' in typed
+
+      if (hasIpcShape) {
+        return typed as unknown as IpcResult<T>
+      }
+
+      if (typed.success === true) {
+        return { success: true, data: result as T }
+      }
+
+      return {
+        success: false,
+        error: typeof typed.error === 'string' ? typed.error : 'IPC operation failed'
+      }
+    }
+
+    return { success: true, data: result as T }
+  })
+}
+
+export { ipcRenderer }