[env-switcher] Clicking Preview/Live takes you to the main branch

[alexcarol]

Expected Behaviour

The "preview" and "live" buttons in the env switcher should match the current branch you're using in the environment.

Actual Behaviour

They're defaulting to main

Reproduce Scenario (including but not limited to)

When switching environments while in a branch environment

Steps to Reproduce

1. Open the site on a url for a specific branch in preview/live environments
2. Click live/preview on the environment selector
3. You're now in the main branch environment

Platform and Version

Chrome Version 130.0.6723.116 (Official Build) (arm64)
Sidekick 7.1.1

Sample Code that illustrates the problem

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Logs taken while reproducing problem

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[rofe]

The current v7 behavior is identical to v6, but I agree that it would be practical/expected to stay on a specific branch. However, when switching to the editor and back, it isn't possible to retain the branch. So I'm wondering if always switching to main - like we do now - is the more consistent behavior...