Feat/tenant switcher shown when user other tenants not main

[michael-on-code]

Checklist

• Tests were added/updated according to the feature/bugfix/change made
• Version was rolled according to semver requirements
• API endpoints openapi schema was updated if applicable

Changes

• Feat/tenant switcher shown when user other tenants not main

[mamigot]

Claude finished @michael-on-code's task —— View job

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E2E Coverage Review

• Gather context
• Dismiss stale REQUEST_CHANGES reviews (none found)
• Check changed files
• Run mechanical coverage check
• Apply decision logic

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✅ E2E Coverage — No Issues

No new app routes (page.tsx) were introduced in this PR. The changes are limited to:

• components/header/profile/tenant-select.tsx
• components/header/profile/user-profile-button.tsx
• Test files for the above components

All existing coverage is intact. No e2e coverage updates required.

⚠️ Note: The gh pr review command requires additional tool permissions to post a formal GitHub review. The coverage assessment above reflects CASE E (no new routes, coverage intact — approved).