feat: add search input field

[441126098]

Summary

Add a search input box to the variable selection popup in the text editor.Refactor blur event handling mechanism in editor component.

Resolves #17364 Resolves #18100

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Checklist

Important

Please review the checklist below before submitting your pull request.

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there awas no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

[Copilot]

Pull Request Overview

This PR introduces a search input field to the variable selection popup and refactors the blur event handling mechanism in the editor component. It updates the VarReferenceVars component to support onClose and onBlur callbacks, modifies the on-blur-or-focus block to ignore blur events triggered by interacting with the search input, and adjusts the component picker to integrate these new behaviors.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
web/app/components/workflow/nodes/_base/components/variable/var-reference-vars.tsx	Added search input with onKeyDown and onBlur handlers for dismissal via Escape key or blur events.
web/app/components/base/prompt-editor/plugins/on-blur-or-focus-block.tsx	Refactored the blur command to guard against triggering onBlur for search input interactions.
web/app/components/base/prompt-editor/plugins/component-picker-block/index.tsx	Updated usage of VarReferenceVars to pass the new onClose and onBlur callbacks.