fix(expeirments): Adjust interval bar color

[jurajmajerik]

Problem

From feedback, it's currently not obvious when a variant result is significant since the confidence/credible interval bars are always colored.

Changes

Gray out the interval bars for non-significant results, only showing red/green coloring when the result is statistically significant. This is how competing tools do it too.

[github-actions[bot]]

Size Change: 0 B

Total Size: 3.7 MB

ℹ️ View Unchanged

Filename	Size
frontend/dist/toolbar.js	3.7 MB

_{compressed-size-action}

[posthog-bot]

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[jurajmajerik]

@andehen picking this up again. Made some tweaks based on our discussion:

• Frequentist non-significant results show a grey bar
• Bayesian non-significant results still show green/red colors, but faded
• When significant, the cell has colored background

I kinda like it, the cell perhaps is a bit too prominent for me. Happy to iterate further on this.

[jurajmajerik]

Yes, I remember now! Added the column, I quite like it :)

[posthog-bot]

Visual regression: Storybook UI snapshots updated

Changes: 17 snapshots (17 modified, 0 added, 0 deleted)

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• Next CI run will switch to CHECK mode to verify stability
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