Specify max file size per-transcription service

[rgoldfinger]

Summary

Type of Change

• feat: New feature
• fix: Bug fix
• docs: Documentation update
• refactor: Code refactoring (no functional changes)
• perf: Performance improvement
• test: Test additions or changes
• chore: Maintenance tasks
• style: Code style changes

Related Issue

Closes #786

Changes Made

Specify file size limits per-transcription service. The file upload control already enforces the passed-in file size limit so this was a surprisingly small change to make.

Testing

I have tested this locally with a 100mb file using local whisper.

Desktop App Testing

• Tested on macOS
• Tested on Windows
• Tested on Linux
• Not applicable (web-only change)

General Testing

• Tested with multiple API providers (if applicable)
• Verified no API keys are exposed in logs or storage
• Checked for console errors
• Tested on different screen sizes (if UI change)

Checklist

• My code follows the project's coding standards (see CONTRIBUTING.md)
• I've used type instead of interface in TypeScript
• I've used absolute imports where applicable
• I've tested my changes thoroughly
• I've added/updated tests for my changes (if applicable)
• no existing svelte test infrastructure
• My changes don't break existing functionality
• I've updated documentation (if needed)
• none found

Screenshots/Recordings

Additional Notes