feat: add AnalyzeConversation tool and related graph for analyzing conversation risks and summaries

internal/ai/runtime/graphs/analyze_conversation_graph_test.go

@@ -0,0 +1,53 @@
+package graphs
+
+import (
+	"testing"
+
+	"cs-agent/internal/models"
+	"cs-agent/internal/pkg/enums"
+)
+
+func TestBuildAnalyzeConversationResult_RecommendsHandoffForComplaint(t *testing.T) {
+	conversation := &models.Conversation{
+		Subject:            "用户投诉扣费异常",
+		LastMessageSummary: "用户反馈被重复扣费，并要求人工处理",
+	}
+	messages := []models.Message{
+		{SenderType: enums.IMSenderTypeCustomer, Content: "你们重复扣费了，我要投诉并转人工"},
+	}
+
+	got := buildAnalyzeConversationResult(conversation, messages, AnalyzeConversationInput{
+		NeedHumanHandoff: true,
+	})
+
+	if got.UserIntent != "handoff_request" {
+		t.Fatalf("expected handoff_request, got %q", got.UserIntent)
+	}
+	if got.RiskLevel != "high" {
+		t.Fatalf("expected high risk, got %q", got.RiskLevel)
+	}
+	if got.RecommendedNextAction != "handoff_to_human" {
+		t.Fatalf("expected handoff_to_human, got %q", got.RecommendedNextAction)
+	}
+}
+
+func TestBuildAnalyzeConversationResult_RecommendsPrepareTicket(t *testing.T) {
+	conversation := &models.Conversation{
+		Subject:            "订单无法支付",
+		LastMessageSummary: "用户要求登记问题并尽快处理",
+	}
+	messages := []models.Message{
+		{SenderType: enums.IMSenderTypeCustomer, Content: "麻烦帮我建个工单，订单一直支付失败"},
+	}
+
+	got := buildAnalyzeConversationResult(conversation, messages, AnalyzeConversationInput{
+		NeedTicket: true,
+	})
+
+	if got.UserIntent != "ticket_request" {
+		t.Fatalf("expected ticket_request, got %q", got.UserIntent)
+	}
+	if got.RecommendedNextAction != "prepare_ticket" {
+		t.Fatalf("expected prepare_ticket, got %q", got.RecommendedNextAction)
+	}
+}