feat: setup IPC communication framework

- Add IPC types definition with all communication channels
- Implement preload script with API surface for renderer process
- Add IPC handler registration stub in main entry point

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

src/main/index.ts

@@ -52,6 +52,12 @@ app.whenReady().then(() => {
   // IPC test
   ipcMain.on('ping', () => console.log('pong'))
 
+  // IPC Handler Registration
+  // TODO: Register IPC handlers for:
+  // - automation:clean, automation:extract, automation:stop, automation:progress
+  // - database:query-production-orders, database:query-materials-to-delete
+  // - auth:login, auth:logout
+
   createWindow()
 
   app.on('activate', function () {

src/main/models/ipc.types.ts

@@ -0,0 +1,10 @@
+export interface IPCChannels {
+  'automation:clean': any;
+  'automation:extract': any;
+  'automation:stop': any;
+  'automation:progress': any;
+  'database:query-production-orders': any;
+  'database:query-materials-to-delete': any;
+  'auth:login': any;
+  'auth:logout': any;
+}

src/preload/index.ts

@@ -1,8 +1,28 @@
-import { contextBridge } from 'electron'
+import { contextBridge, ipcRenderer } from 'electron'
 import { electronAPI } from '@electron-toolkit/preload'
 
-// Custom APIs for renderer
-const api = {}
+const API = {
+  automation: {
+    clean: (params: any) => ipcRenderer.invoke('automation:clean', params),
+    extract: (params: any) => ipcRenderer.invoke('automation:extract', params),
+    stop: () => ipcRenderer.invoke('automation:stop'),
+    onProgress: (callback: (progress: any) => void) => {
+      const listener = (_: any, progress: any) => callback(progress);
+      ipcRenderer.on('automation:progress', listener);
+      return () => ipcRenderer.removeListener('automation:progress', listener);
+    },
+  },
+  database: {
+    queryProductionOrders: (productionIds: string[]) =>
+      ipcRenderer.invoke('database:query-production-orders', productionIds),
+    queryMaterialsToDelete: (managerNames: string[] | null) =>
+      ipcRenderer.invoke('database:query-materials-to-delete', managerNames),
+  },
+  auth: {
+    login: (credentials: any) => ipcRenderer.invoke('auth:login', credentials),
+    logout: () => ipcRenderer.invoke('auth:logout'),
+  },
+}
 
 // Use `contextBridge` APIs to expose Electron APIs to
 // renderer only if context isolation is enabled, otherwise
@@ -10,7 +30,7 @@ const api = {}
 if (process.contextIsolated) {
   try {
     contextBridge.exposeInMainWorld('electron', electronAPI)
-    contextBridge.exposeInMainWorld('api', api)
+    contextBridge.exposeInMainWorld('api', API)
   } catch (error) {
     console.error(error)
   }
@@ -18,5 +38,7 @@ if (process.contextIsolated) {
   // @ts-ignore (define in dts)
   window.electron = electronAPI
   // @ts-ignore (define in dts)
-  window.api = api
+  window.api = API
 }
+
+export type API = typeof API