fix: add macOS availability checks in MacSysOcrProvider and OcrProviderFactory

src/main/ocr/MacSysOcrProvider.ts

@@ -1,3 +1,4 @@
+import { isMac } from '@main/constant'
 import { FileSource, isLocalFile, LocalFileSource, OcrProvider } from '@types'
 import Logger from 'electron-log'
 import * as fs from 'fs'
@@ -14,6 +15,9 @@ export default class MacSysOcrProvider extends BaseOcrProvider {
   private MacOCR: any
 
   private async initMacOCR() {
+    if (!isMac) {
+      throw new Error('MacSysOcrProvider is only available on macOS')
+    }
     if (!this.MacOCR) {
       try {
         const module = await import('@cherrystudio/mac-system-ocr')

src/main/ocr/OcrProviderFactory.ts

@@ -1,4 +1,6 @@
+import { isMac } from '@main/constant'
 import { OcrProvider } from '@types'
+import Logger from 'electron-log'
 
 import BaseOcrProvider from './BaseOcrProvider'
 import DefaultOcrProvider from './DefaultOcrProvider'
@@ -13,6 +15,9 @@ export default class OcrProviderFactory {
       case 'mistral':
         return new MistralOcrProvider(provider)
       case 'system':
+        if (!isMac) {
+          Logger.warn('[OCR] System OCR provider is only available on macOS')
+        }
         return new MacSysOcrProvider(provider)
       default:
         return new DefaultOcrProvider(provider)