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Description

useLabelStore was originally introduced in commit 45deaee but was mistakenly removed in commit 403e2d5.
However, both Category and Blocks are still dependent on it. This PR restores the removed code to fix the issue.

Ref code: https://github.com/langgenius/dify/blob/main/web/app/components/tools/add-tool-modal/tools.tsx#L20
and https://github.com/langgenius/dify/blob/main/web/app/components/tools/add-tool-modal/category.tsx#L10

Motivation

No response

Additional Context

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