closes https://github.com/twentyhq/core-team-issues/issues/1076
## Problem
When opening a workflow run in the side panel and then navigating to the
full page view, the workflow visualizer tab wouldn't display until the
page was refreshed.
## Root Cause
- In the side panel, tabs are merged into a single "home" tab
- When navigating to full page, the activeTabId state persisted as
"home"
- But the full page view only has a "workflowRun"(flow) tab, not "home"
- TabList was trying to display a non-existent tab, resulting in blank
content
## Solution
Added validation in TabList to check if activeTabId exists in
visibleTabs. If not, it falls back to the first available tab.
4c81d60dc7