Add Calibrate AI Control UI and fleet LLM backend wiring.

Operators toggle Logic gates vs AI Control on Settings, refresh local Ollama models, and save ai_endpoint settings via Calibrate PUT; server scheduler and agent snapshot/command paths support stateless 60s fleet decisions.

server/internal/api/server_policy.go

@@ -13,6 +13,8 @@ type ServerPolicy struct {
 	ServiceDeployAllowlist map[string]ServiceDeployLane
 	MiningTierPolicy       MiningTierPolicy
 	TripleOnionPolicy      TripleOnionPolicy
+	// AIControlEnabled replaces adaptive_strategy when true (Fleet AI Control).
+	AIControlEnabled bool
 }
 
 // TripleOnionPolicy gates the recon → deploy → mining onion pushed to agents at auth.