feat(devkitd): route console panes through daemon + fix new-session preview delay #412

Part of the devkitd agent migration (#406). Console hooks → daemon-backed.

Scope

• useAgentList → DaemonClient.listAgents (daemon subscribe already drives refresh ✓)
• Send/rename/kill/open panes → daemon lookup + client-side runtime calls
• useAgentConversation unchanged — file-tail stays local (daemon shouldn't own transcript parsing)
• Related: fix(agent-console): new session file takes ~60s to appear in preview after daemon subscribe #405 — warm-up refresh after appeared (new-session preview ~60s delay) — fix in this scope

Acceptance

• Console start/kill/send/rename/open paths route through daemon when available
• Preview delay for new sessions fixed