Release Notes - Nebula AI Case Explorer 1.6.0

Agentic Chat now remembers more details from the conversation.
- Follow-up questions can build on everything earlier in the chat, including details of tool calls.
Document sets saved from Agentic Chat get more descriptive title automatically.
Agentic Chat can now search by All Custodians.
If an Agentic Chat answer is interrupted by a server problem, it now shows as failed instead of looking like it is still running.
Case Explorer keeps your session alive while you're actively working.
Pages load consistently with skeletons animation instead of spinners.
The "Filters" banner has been removed from Global Filters to free up space.
Dashboard tabs now use cleaner URLs (e.g. /dashboard/events), and the browser's back and forward buttons move between tabs

The onboarding wizard no longer lets you pick searches with 0 documents or searches that were never run.
The saved searches list in the onboarding wizard no longer includes unsaved searches.
The AI Relevancy case summary step in the onboarding wizard now accepts only one file, as intended.
Projects that were open during a Case Explorer update now finish upgrading correctly.
Saved searches no longer store a document more than once when it appears in several project versions.
Switching chats while an answer is still streaming no longer briefly shows the previous answer as stopped.