[FALL] Fix File Persistence on Page Reload for Single and Multiple File Uploads

[sanjacornelius]

Issue & Reproduction Steps

This PR addresses two key issues related to file persistence within File Upload components in Screen Builder:

1. Ensures that uploaded files remain persisted after a page reload.
2. For multiple file uploads, ensures that the initial uploaded file persists after page reload when additional files are uploaded.

The solution introduces a fetchFile function, which retrieves uploaded files by their ID on component mount if this.value exists, providing consistent file persistence across reloads.

Changes:

• Implement fetchFile logic to retrieve uploaded files by ID when this.value is present during component mount.
• Update file handling logic to support both single and multiple file upload configurations.

How to Test:

• Ensure you have package-versions installed to utilize the Autosave functionality
• Create a screen with two File Upload controls:
  - Single File Upload
  - Multiple File Upload
• Add two File Preview controls
• Configure the File Previews to display uploaded files from the Single and Multiple File upload controls
• Create and run a process using the configured screen
• Upload files for both single and multiple file controls
• Verify that all uploaded files display correctly in the File Previews.
• Reload the page.
• File uploaded to the Single File Upload control remain in the upload control
• File uploaded to the Multiple File upload control persist after reload.
• Check that the File Previews to ensure all uploaded files are displayed correctly.

Note: Due to unsupported autosave functionality, file persistence will not work in Web Entry and Collection screens.

Related Tickets & Packages

- FOUR-19799
- FOUR-14168

Code Review Checklist

• I have pulled this code locally and tested it on my instance, along with any associated packages.
• This code adheres to ProcessMaker Coding Guidelines.
• This code includes a unit test or an E2E test that tests its functionality, or is covered by an existing test.
• This solution fixes the bug reported in the original ticket.
• This solution does not alter the expected output of a component in a way that would break existing Processes.
• This solution does not implement any breaking changes that would invalidate documentation or cause existing Processes to fail.
• This solution has been tested with enterprise packages that rely on its functionality and does not introduce bugs in those packages.
• This code does not duplicate functionality that already exists in the framework or in ProcessMaker.
• This ticket conforms to the PRD associated with this part of ProcessMaker.

[cypress]

screen-builder    Run #1615

Run Properties:   Passed #1615  •  34b0fbccc4: [FALL] Fix File Persistence on Page Reload for Single and Multiple File Uploads

Project	screen-builder
Branch Review	bugfix/FOUR-19799-fall
Run status	Passed #1615
Run duration	08m 39s
Commit	34b0fbccc4: [FALL] Fix File Persistence on Page Reload for Single and Multiple File Uploads
Committer	Sanja
View all properties for this run ↗︎

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Test results
Failures	0
Flaky	0
Pending	19
Skipped	0
Passing	341
View all changes introduced in this branch ↗︎