🐛 Bugfix: exit create mode and select newly created agent after saving

[xuyaqist]

#2737
Bugfix: exit create mode and select newly created agent after saving

When users clicked "Save" in create mode, the interface remained in create mode instead of exiting and selecting the newly created agent. This allowed users to repeatedly click Save and create duplicate agents with the same name.

Changes:

For newly created agents, immediately call setCurrentAgent() after successful save to exit create mode and select the new agent
This ensures isCreatingMode is set to false and the newly created agent is highlighted in the agent list
Update mode behavior remains unchanged

20260328-164121.mp4

[Copilot]

Pull request overview

Fixes the agent creation flow so that after a successful “Save” in create mode, the UI exits create mode and selects the newly created agent (preventing repeated saves from creating duplicates).

Changes:

• On successful create, constructs a minimal Agent object and immediately calls setCurrentAgent() to exit create mode and select the new agent.
• Keeps tool config batch update + react-query cache invalidation/refetch behavior for both create and update flows.
• Updates update-mode selection to only set the current agent from refreshed cache when not newly created.

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