feat(fork): create fork demo with multiple browser agents

[mattteufel-e2b]

1. add new agent fork demo
2. update logos across surf app
3. update logos inside the template. create minimal template in project to make changes here easier in the future.

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Project	Deployment	Actions	Updated (UTC)
surf	Ready	Preview, Comment	Jul 6, 2026 6:38pm

[cursor]

Stale comment

Identified 2 net-new high-severity security issues on the current head after deduplication and validation:

1. Server-side demo credentials are exposed to the browser.
2. Privileged sandbox snapshot/kill operations trust caller-supplied sandbox IDs without authorization checks.

Requesting changes to address both before merge.

  

_{Sent by Cursor Security Agent: Security Reviewer}

[cursor]

Stale comment

[ben-fornefeld]

Demo credentials missing. Set DEMO_SITE_USERNAME and DEMO_SITE_PASSWORD in .env.local.

can we detect this before building such that it errors out with wrong env setup

[ben-fornefeld]

"E2B SNAPSHOTS" does not tell me much as a user

Can we have the title something like: "Demo - Stateful machine forking"?

[ben-fornefeld]

I feel like the title is a bit much to parse, any better ui here?

Also i am missing a "Back" button to go back to surf