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/ai/client_test.go

@@ -0,0 +1,66 @@
+package ai
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestListModelsOpenAI(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/v1/models" {
+			http.NotFound(w, r)
+			return
+		}
+		_ = json.NewEncoder(w).Encode(map[string]interface{}{
+			"data": []map[string]string{{"id": "llama3.2"}, {"id": "mistral"}},
+		})
+	}))
+	defer srv.Close()
+
+	models, err := ListModelsWithClient(context.Background(), srv.URL+"/v1", srv.Client())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(models) != 2 || models[0] != "llama3.2" {
+		t.Fatalf("models: %v", models)
+	}
+}
+
+func TestDecideOpenAI(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/v1/chat/completions" {
+			http.NotFound(w, r)
+			return
+		}
+		var req map[string]interface{}
+		_ = json.NewDecoder(r.Body).Decode(&req)
+		msgs, _ := req["messages"].([]interface{})
+		if len(msgs) != 2 {
+			t.Fatalf("expected single-turn messages, got %d", len(msgs))
+		}
+		_ = json.NewEncoder(w).Encode(map[string]interface{}{
+			"choices": []map[string]interface{}{
+				{"message": map[string]string{"content": `{"commands":[{"type":"noop","args":{}}]}`}},
+			},
+		})
+	}))
+	defer srv.Close()
+
+	out, err := DecideWithClient(context.Background(), srv.URL+"/v1", "test-model", "sys", "user", srv.Client())
+	if err != nil {
+		t.Fatal(err)
+	}
+	cmds := ParseCommands(out)
+	if len(cmds) != 1 || cmds[0].Type != CmdNoop {
+		t.Fatalf("parse: %+v", cmds)
+	}
+}
+
+func TestNormalizeEndpoint(t *testing.T) {
+	if got := normalizeEndpoint("http://127.0.0.1:11434"); got != "http://127.0.0.1:11434/v1" {
+		t.Fatalf("got %q", got)
+	}
+}