fix(file-upload): The file size limit in the EDM upload mode is invalid.

[discreted66]

PR

fix:修复edm上传模式，文件大小限制失效

PR Checklist

Please check if your PR fulfills the following requirements:

• [ ] The commit message follows our Commit Message Guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• [ ] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [ ] Documentation content changes
• [ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• [ ] Yes
• [ ] No

Other information

Summary by CodeRabbit

• Bug Fixes
  • Improved file upload size validation: now correctly prioritizes configured size limits from multiple sources, handles array-based max-size inputs, and applies consistent unit conversion.
  • Expanded and more accurate file-size violation notifications so users receive clearer feedback when uploads exceed limits.