docs: unify image references per version and update README with image inventory

- All v1.3.0 pages now reference /images/v1.3.0/ paths
- All v1.4.0 pages now reference /images/v1.4.0/ paths
- Update README with complete image inventory per version

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

zh/manual/v1.3.0/features/timer.mdx

@@ -12,7 +12,7 @@ description: "AutoLibrary 定时任务管理 - 添加、编辑、删除定时任
 
 ![定时任务管理窗口](/images/v1.3.0/timer-management-window.png)
 
-![功能介绍-定时任务](/images/v1.2.1/feature-timer.png)
+![功能介绍-定时任务](/images/v1.3.0/feature-timer.png)
 
 
 ## 添加定时任务