handle var for clear selected files

[adhami3310]

No description provided.

[greptile-apps]

Greptile Summary

This PR refactors the clear_selected_files function in the upload component to use a more type-safe approach for JavaScript function calls. The change replaces string interpolation-based JavaScript generation with the proper Var system pattern.

Key Changes:

• Adds import for FunctionVar from reflex.vars.function
• Replaces call_script(f"{func}({id_!r})") with run_script(Var("__clear_selected_files")._as_ref().to(FunctionVar).call(id_))

This change integrates well with Reflex's broader architecture by leveraging the framework's Var system, which is designed to handle type-safe variable operations and function calls. The Var system provides proper type checking and validation for JavaScript interop, making this approach more consistent with how other parts of the codebase handle dynamic function calls. The clear_selected_files function is part of the upload component's file management functionality, and this refactor ensures it follows the same patterns used elsewhere in the framework for JavaScript function invocation.

Confidence score: 4/5

• This PR is safe to merge with minimal risk as it's a straightforward refactoring that improves type safety
• Score reflects a well-structured change that follows established framework patterns and improves code quality
• No files require special attention as the change is isolated and uses well-tested framework APIs

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[codspeed-hq]

CodSpeed Performance Report

Merging #5784 will not alter performance

_{Comparing handle-var-for-clear-selected-files (7e04a33) with main (f0b2075)}

Summary

✅ 8 untouched