chore(no-code experiments): refactor (2)

[jurajmajerik]

Part of #28205

Changes

• Undo transforms when the variant tab is changed
• Undo transforms when the content type selector (text/html) is changed
• Only render the inputs when a selector is selected
• Other small cleanups

https://www.loom.com/share/942c1c0cf5ff41a99979a22bffd088fa?sid=096012b5-037a-4164-b076-b6561bb4ee85

How did you test this code?

👀

[greptile-apps]

PR Summary

This PR refactors the no-code experiments functionality to improve state management and undo behavior when switching between variants and content types.

• Removed undo_transforms field from WebExperimentForm interface in /frontend/src/toolbar/types.ts in favor of using original_html_state for state restoration
• Added logic in /frontend/src/toolbar/experiments/experimentsTabLogic.tsx to restore original HTML state before applying new transforms when switching variants
• Modified /frontend/src/toolbar/experiments/WebExperimentTransformField.tsx to conditionally render inputs only when a selector is selected
• Improved variant handling in /frontend/src/toolbar/experiments/ExperimentsEditingToolbarMenu.tsx to use simplified variant change handler with single parameter

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[github-actions]

Size Change: +61 B (+0.01%)

Total Size: 1.17 MB

ℹ️ View Unchanged

Filename	Size	Change
frontend/dist/toolbar.js	1.17 MB	+61 B (+0.01%)

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[andehen]

Nice improvement! Looks good 👍