Sessions now record the input-bar state used for the most recent QA
request (agent, model, KB scope, web search). The chat UI hydrates
those settings on session reopen so users see the same configuration
they used last time, instead of the global default.
The state is stored in the existing sessions.agent_config JSONB column
to avoid a new migration. Frontend snapshots the user's global defaults
on session enter and restores them on session leave, so opening an old
session does not pollute new-chat defaults.
wizardchen
7bb38f81b6