feat: 交叉验证 AI vs LAMP（#15，一致确认/不一致升级会诊）

server-go/internal/service/cross_validate.go

@@ -0,0 +1,34 @@
+package service
+
+// CrossValidate 交叉验证：AI 检测结果 vs LAMP 检测结果（规格书：一致→确认诊断；不一致→升级专家会诊）
+func CrossValidate(aiClass, lampResult string, lampDiseases []string) (bool, string) {
+	switch {
+	case lampResult == "invalid":
+		return false, "LAMP 判读无效，建议复检或专家会诊"
+	case aiClass == "":
+		return false, "未找到关联巡检记录，暂无法交叉验证"
+	case aiClass == "sick" && lampResult == "positive":
+		return true, "AI 检出异常与 LAMP 阳性一致，确认诊断"
+	case aiClass == "healthy" && lampResult == "negative":
+		return true, "AI 未见异常与 LAMP 阴性一致"
+	case aiClass == "sick" && lampResult == "negative":
+		return false, "AI 检出异常但 LAMP 阴性，建议专家会诊"
+	case aiClass == "healthy" && lampResult == "positive":
+		return false, "AI 未见异常但 LAMP 阳性，建议专家会诊"
+	default:
+		return false, "交叉验证结果待确认"
+	}
+}
+
+// AIClassFromDetections 从巡检检测结果归纳 AI 结论（任一非 healthy 视为 sick）
+func AIClassFromDetections(detections []AIDetection) string {
+	if len(detections) == 0 {
+		return ""
+	}
+	for _, d := range detections {
+		if d.ClassName != "healthy" {
+			return "sick"
+		}
+	}
+	return "healthy"
+}

server-go/internal/service/cross_validate_test.go

@@ -0,0 +1,40 @@
+package service
+
+import "testing"
+
+func TestCrossValidate(t *testing.T) {
+	cases := []struct {
+		name       string
+		aiClass    string
+		lampResult string
+		wantOK     bool
+	}{
+		{"AI异常+LAMP阳性 一致", "sick", "positive", true},
+		{"AI健康+LAMP阴性 一致", "healthy", "negative", true},
+		{"AI异常+LAMP阴性 不一致", "sick", "negative", false},
+		{"AI健康+LAMP阳性 不一致", "healthy", "positive", false},
+		{"LAMP无效 不一致", "sick", "invalid", false},
+		{"无AI记录 不一致", "", "positive", false},
+	}
+	for _, c := range cases {
+		ok, reason := CrossValidate(c.aiClass, c.lampResult, []string{"核型多角体病"})
+		if ok != c.wantOK {
+			t.Errorf("%s: ok=%v, want %v（原因 %s）", c.name, ok, c.wantOK, reason)
+		}
+		if reason == "" {
+			t.Errorf("%s: 缺少原因说明", c.name)
+		}
+	}
+}
+
+func TestAIClassFromDetections(t *testing.T) {
+	if got := AIClassFromDetections(nil); got != "" {
+		t.Errorf("空检测应为空，实际 %s", got)
+	}
+	if got := AIClassFromDetections([]AIDetection{{ClassName: "healthy", Confidence: 0.9}}); got != "healthy" {
+		t.Errorf("全健康应为 healthy，实际 %s", got)
+	}
+	if got := AIClassFromDetections([]AIDetection{{ClassName: "healthy"}, {ClassName: "sick", Confidence: 0.6}}); got != "sick" {
+		t.Errorf("含 sick 应为 sick，实际 %s", got)
+	}
+}