[Enhancement] 添加自动修复工作流 (#337)

* feat: add GitHub Action to automatically strip EXIF data and compress images via PR comments

* fix: 提升尝试压缩后修复失败的用户体验

* feat: 现在修复结果会直接基于源 comment 做 update

* fix: 修复工作流仍然报告失败的问题

* doc: 添加自动修复引导

* ci: 改用 `github.rest.repos.compareCommitsWithBasehead`

* ci: 增强检查工作流

.github/workflows/check_exif.yml

@@ -128,7 +128,11 @@ jobs:
                 '**仅高敏感字段（GPS / 地址 / 联系方式）需要移除，普通摄影参数（光圈、快门等）无需处理。**',
                 '**Only high-sensitivity fields (GPS / address / contact info) need to be removed. Regular photography parameters (aperture, shutter speed, etc.) are fine to keep.**',
                 '',
-                `📖 [EXIF 说明 / EXIF Guide](https://github.com/${owner}/${repo}/blob/master/EXIF.md) · [CONTRIBUTING.md](https://github.com/${owner}/${repo}/blob/master/CONTRIBUTING.md)`
+                `📖 [EXIF 说明 / EXIF Guide](https://github.com/${owner}/${repo}/blob/master/EXIF.md) · [CONTRIBUTING.md](https://github.com/${owner}/${repo}/blob/master/CONTRIBUTING.md)`,
+                '---',
+                '',
+                '<small>温馨提示: 您可以直接使用 `/auto-fix` 命令来自动修复这些文件。</small>',
+                '<small>Warm reminder: You can use the `/auto-fix` command to automatically fix these files.</small>'
               ].join('\n');
               try { await github.rest.issues.createComment({ owner, repo, issue_number: prNumber, body }); }
               catch (e) { core.warning(`Cannot comment: ${e.message}. Check repo Settings > Actions > Workflow permissions.`); }