feat: Add Storybook snapshots for Web Analytics and Web Vitals

[rafaeelaudibert]

Changes

These are way overdue, so here we have some snapshots for UI regressions on Web Analytics and Web Vitals

Note

This might look like the Trends charts are not rendering and I have to fix this, but it's actually a known restriction we've self-imposed. See https://posthog.slack.com/archives/C02E3BKC78F/p1737501183808219. I'm working on changing that in a follow-up PR.

In a follow-up PR, I'll attempt to automate copying these snapshots to the posthog.com repo to keep our product screenshots always up to date 🕺🏻

Does this work well for both Cloud and self-hosted?

Not relevant

How did you test this code?

This is literally test code!

[rafaeelaudibert]

Most of the stat numbers in those jsons are our actual numbers. We intend to make them public soon anyway, so I'm not worried about sharing them here. Some of them have been slightly altered because I wanted nicer-looking charts (more randomization on the before/after arrows, for example), ours always look up and to the right, but some random downturns look nicer on the website

[rafaeelaudibert]

@robbie-c This is almost ready, I just need to figure out how can I restrict the width/height from some of these renders to guarantee that they look nicer in the website

[github-actions]

Size Change: -766 B (-0.07%)

Total Size: 1.16 MB

ℹ️ View Unchanged

Filename	Size	Change
frontend/dist/toolbar.js	1.16 MB	-766 B (-0.07%)

_{compressed-size-action}

[posthog-bot]

📸 UI snapshots have been updated

4 snapshot changes in total. 0 added, 4 modified, 0 deleted:

• chromium: 0 added, 4 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.