fix(frontend): navigate to demo from any org

[mmabrouk]

What changed

• Update Get Started and Home welcome-card demo CTAs to fall back to switching to the demo org when the current workspace’s project list doesn’t include a demo project.
• Keep existing behavior when a demo project is already present in the current projects list.

Why

When users are currently in a non-demo organization, the in-memory projects list is scoped to that org/workspace. That means projects.find(p => p.is_demo) can be empty even though a demo org exists and is accessible, which caused a false "Demo project is not available" error.

How to test

1. Login with a user that has access to the demo org.
2. While selected on a non-demo org, go to /get-started and click "Explore demo workspace".
3. On Home, click "Explore demo project" in the welcome cards.
4. Verify both routes take you into the demo workspace/project instead of erroring.

Lint

• Ran pnpm lint-fix in web/.

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Project	Deployment	Actions	Updated (UTC)
agenta-documentation	Ready	Preview, Comment	Feb 5, 2026 8:07pm

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 3 additional findings.