Remove the import agent functionality from the app while preserving
the underlying resume capability in the agent code.
Changes:
- Remove ImportAgentModal and import flow from create-agent-modal.tsx
- Remove "Import Agent" menu item from agent screen
- Remove "Import" button from home footer
- Remove resumeAgent from session context and store
- Remove list_persisted_agents WS messages from server
- Remove handleListPersistedAgentsRequest handler
- Clean up unused styles and types
The resumeAgent capability remains in the agent manager for potential
future use or internal tooling.
Mohamed Boudra
cc74d6d0d2