Session state not persisted when switching between sessions (open tabs + draft input lost)

[ambient-code]

Category: bug / UX improvement

Summary

When switching between sessions, open artifact tabs and draft prompt input are not preserved — they are lost every time the user navigates away and returns.

Steps to Reproduce

1. Open a file artifact in a new tab
2. Switch to a different session
3. Switch back to the original session
4. Result: The artifact tab is gone/closed

Also:

1. Start typing a prompt in the input box
2. Switch to a different session
3. Switch back
4. Result: Draft input is gone

Expected Behavior

Session UI state (open artifact tabs + draft prompt input) should be persisted per session and restored when returning to that session.

Actual Behavior

• Open artifact tabs are closed when switching away from a session
• Draft prompt input is cleared when switching away from a session
• Both issues happen every time, with all artifact types

Impact

User must re-open artifact tabs and re-type prompts every time they switch between sessions.

Notes

User identified these as the same root cause: browser UI state (tabs + input) is not being persisted per session. This falls into the category of UI/UX improvements around persisting browser actions/data for sessions.

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Filed via Amber Interview