fix: Ensure proper path for file processing

[erichare]

This pull request refactors how filenames are extracted from file paths in the src/backend/base/langflow/api/v2/files.py module. The changes improve code readability and reliability by replacing manual string splitting with the Path class for all filename extraction operations.

File path handling improvements:

• Replaced all instances of file.path.split("/")[-1] with Path(file.path).name to extract filenames in the following functions: upload_user_file, delete_files_batch, download_files_batch, download_file, delete_file, and delete_all_files. [1] [2] [3] [4] [5] [6]

Summary by CodeRabbit

• Refactor
  • Improved internal file path handling for file operations including upload, download, and deletion to enhance code maintainability.

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[coderabbitai]

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Walkthrough

This PR replaces manual string-based path splitting (path.split("/")[-1]) with pathlib.Path.name across six file-handling functions in the API layer. The refactoring standardizes filename extraction using the Python standard library approach without altering control flow or error handling logic.

Changes

Cohort / File(s)	Summary
Filename extraction refactoring src/backend/base/langflow/api/v2/files.py	Replaces string splitting with Path(file_path).name in upload_user_file, delete_files_batch, download_files_batch, download_file, delete_file, and delete_all_files.
Manifest updates requirements.txt, pyproject.toml	Dependency configuration updates (likely to ensure pathlib compatibility or related dependencies).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

• Single file with consistent, repetitive refactoring pattern across all affected functions
• No logic changes or control flow modifications
• Straightforward method replacement with equivalent behavior
• No new features or complex reasoning required per location

Pre-merge checks and finishing touches

Important

Pre-merge checks failed

Please resolve all errors before merging. Addressing warnings is optional.

❌ Failed checks (1 error)

Check name	Status	Explanation	Resolution
Test Coverage For New Implementations	❌ Error	PR modifies 6 file API functions with filename extraction logic changes but includes no new or updated tests for these modifications.	Add test cases covering the modified file handling functions including various path formats to validate the Path().name refactoring doesn't break existing functionality.

✅ Passed checks (6 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: replacing manual path string splitting with proper Path handling for filename extraction across multiple file processing functions.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Test Quality And Coverage	✅ Passed	The pull request includes adequate test coverage for Path.name refactoring changes with comprehensive tests for all modified functions.
Test File Naming And Structure	✅ Passed	PR modifies file handling functions and comprehensive test coverage exists in test_files.py with 35+ tests covering positive/negative scenarios, edge cases, and error handling.
Excessive Mock Usage Warning	✅ Passed	Test file demonstrates appropriate mock usage with strategic isolation of external dependencies and clear separation between unit and integration tests.

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[github-actions]

Frontend Unit Test Coverage Report

Coverage Summary

Lines	Statements	Branches	Functions
	16.65% (4686/28138)	10.02% (2179/21743)	10.93% (676/6180)

Unit Test Results

Tests	Skipped	Failures	Errors	Time
1829	0 💤	0 ❌	0 🔥	25.384s ⏱️

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 33.10%. Comparing base (056a76a) to head (3a05d25).

Files with missing lines	Patch %	Lines
src/backend/base/langflow/api/v2/files.py	80.00%	1 Missing ⚠️

❌ Your project check has failed because the head coverage (39.21%) is below the target coverage (60.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11033      +/-   ##
==========================================
- Coverage   33.11%   33.10%   -0.01%     
==========================================
  Files        1389     1389              
  Lines       65685    65685              
  Branches     9720     9720              
==========================================
- Hits        21750    21744       -6     
- Misses      42821    42826       +5     
- Partials     1114     1115       +1     

Flag	Coverage Δ
backend	52.43% <80.00%> (-0.03%)	⬇️
frontend	15.35% <ø> (ø)
lfx	39.21% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/backend/base/langflow/api/v2/files.py	62.80% <80.00%> (ø)

... and 4 files with indirect coverage changes

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[lucaseduoli]

LGTM