hermes - 💡(How to fix) Fix [Bug]: Sessions page search box disappears after 3–4 seconds when dashboard embedded chat is enabled

Bug Description

When the dashboard is started with embedded TUI chat enabled (hermes dashboard --tui), navigating to the Sessions page shows the search box in the page header correctly on initial load. However, after 3–4 seconds the search box disappears.

This only reproduces when the dashboard is launched with the --tui flag. Starting the dashboard without --tui does not mount the persistent ChatPage component, so the bug does not occur.

Steps to Reproduce

1. Start the dashboard with embedded TUI chat: hermes dashboard --tui
2. Navigate to the Sessions page
3. Observe the search box in the page header — it appears correctly at first
4. Wait 3–4 seconds — the search box disappears

Expected Behavior

The search box should remain visible on the Sessions page regardless of how long the page is open or what background processes are running.

Actual Behavior

The search box vanishes after a short delay. This makes it impossible to search/filter sessions without refreshing the page, which is a degraded user experience.

Impact

• User experience: Users cannot search or filter their sessions reliably
• Frequency: Reproducible every time when dashboard is started with --tui
• Workaround: Refreshing the page temporarily restores the search box, but it disappears again after the same delay

Environment

• Hermes version: v0.14.0+
• Dashboard started with --tui flag (hermes dashboard --tui)
• Browser: any (issue is in dashboard frontend logic)

Additional Context

The ~3–4 second timing aligns with the dashboard's plugin loader finishing its async fetch. This suggests a re-render triggered by plugin state changes is interfering with the page header content set by the Sessions page.

Fix proposed in #30215.