fix: the file upload control button was not refreshed in time

[hllshiro]

Pull Request Description (中文)

你的功能请求是否与某个问题有关？请描述一下。
请对问题进行清晰扼要的描述。
修复知识库上传文件时控制按钮未及时更新的问题。

平台兼容性注意事项
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• 是否有任何平台特定的行为或代码调整？无

Summary by CodeRabbit

• Refactor
  • Improved the responsiveness of the control button status in the Knowledge File settings. The button now always accurately reflects the current status of files without delay.

[coderabbitai]

Walkthrough

The update in the KnowledgeFile component refactors the ctrlBtn state from a reactive reference with a watcher to a computed property, ensuring its value is always derived from the current fileList without manual updates. The computed helper from Vue is now imported to support this change.

Changes

Cohort / File(s)	Change Summary
KnowledgeFile ctrlBtn Refactor src/renderer/src/components/settings/KnowledgeFile.vue	Replaces ctrlBtn ref and watcher with a computed property based on fileList; imports computed from Vue.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A bunny with code in its paws,
Refactored with nary a pause.
Computed and neat,
No watcher to beat,
The state now updates without flaws! 🐇✨

Note

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📥 Commits

Reviewing files that changed from the base of the PR and between 66b42a8 and 18f1cd2.

📒 Files selected for processing (1)

• src/renderer/src/components/settings/KnowledgeFile.vue (2 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• src/renderer/src/components/settings/KnowledgeFile.vue

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• GitHub Check: build-check (x64)

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