fix: 添加构建说明、修复 vosk 提示逻辑

- 优化 EngineStatus 组件中的引擎启动逻辑，增加对 vosk 引擎的判断
- 在 README.md、README_en.md 和 README_ja.md 中添加 macOS 截图

README_en.md

@@ -23,6 +23,8 @@
 
 ![](./assets/media/main_en.png)
 
+![](./assets/media/main_mac_en.png)
+
 ## 📥 Download
 
 [GitHub Releases](https://github.com/HiMeditator/auto-caption/releases)
@@ -149,6 +151,15 @@ pyinstaller ./main-gummy.spec
 pyinstaller ./main-vosk.spec
 ```
 
+Note that the path to the `vosk` library in `main-vosk.spec` might be incorrect and needs to be configured according to the actual situation.
+
+```
+# Windows
+vosk_path = str(Path('./subenv/Lib/site-packages/vosk').resolve())
+# Linux or macOS
+vosk_path = str(Path('./subenv/lib/python3.x/site-packages/vosk').resolve())
+```
+
 After the build completes, you can find the executable file in the `caption-engine/dist` folder. Then proceed with subsequent operations.
 
 ### Run Project