Which project does this relate to?

Start

Describe the bug

Hello,
I've updated to devinxi version of Tanstack Router and found out dev server doesn't work with Vite's --mode test.
I use test mode to enable specific instrumentation in test environment (Playwright) and generally believe this kind of change should be justified with a comment or removed.

Steps to Reproduce the Bug or Issue

1. Run basic example with vite dev --mode test
2. Verify dev server doesn't work

Expected behavior

I expect dev server to still work with test mode.

Screenshots or Videos

No response

Platform

• Router / Start Version: 1.125.6
• OS: -
• Browser: -
• Browser Version: -
• Bundler: Vite
• Bundler Version: -

Additional context

This change was made during devinxi change and is located in start-plugin-code module.