feat(server-go): 分子检测扩展（qPCR Ct 判读/SERS 光谱上传/光谱库，#19）

server-go/internal/model/lamp.go

@@ -8,6 +8,7 @@ import (
 // LampTest LAMP 检测任务单
 type LampTest struct {
 	ID             string          `gorm:"type:uuid;primaryKey;default:gen_random_uuid()" json:"id"`
+	Method         string          `gorm:"size:32;default:lamp" json:"method"` // lamp/qpcr/sers/hyperspectral
 	RoomID         *string         `gorm:"column:room_id;type:uuid;index" json:"roomId,omitempty"`
 	BatchID        *string         `gorm:"column:batch_id;type:uuid;index" json:"batchId,omitempty"`
 	Diseases       json.RawMessage `gorm:"type:jsonb" json:"diseases,omitempty"`
@@ -19,6 +20,7 @@ type LampTest struct {
 	ResultedAt     *time.Time      `gorm:"column:resulted_at;type:timestamptz" json:"resultedAt,omitempty"`
 	CrossStatus    string          `gorm:"column:cross_status;size:16;default:pending" json:"crossStatus"` // pending/consistent/inconsistent
 	CrossReason    *string         `gorm:"column:cross_reason;type:text" json:"crossReason,omitempty"`
+	ExtraData      json.RawMessage `gorm:"column:extra_data;type:jsonb" json:"extraData,omitempty"`
 	Note           *string         `gorm:"type:text" json:"note,omitempty"`
 	CreatedAt      time.Time       `gorm:"type:timestamptz" json:"createdAt"`
 	UpdatedAt      time.Time       `gorm:"type:timestamptz" json:"updatedAt"`
@@ -41,6 +43,18 @@ type LampTestStep struct {
 
 func (LampTestStep) TableName() string { return "lamp_test_steps" }
 
+// SpectrumEntry 光谱库条目
+type SpectrumEntry struct {
+	ID        string    `gorm:"type:uuid;primaryKey;default:gen_random_uuid()" json:"id"`
+	Disease   string    `gorm:"size:64" json:"disease"`
+	Source    *string   `gorm:"size:128" json:"source,omitempty"`
+	DataURL   *string   `gorm:"column:data_url;size:512" json:"dataUrl,omitempty"`
+	Note      *string   `gorm:"type:text" json:"note,omitempty"`
+	CreatedAt time.Time `gorm:"type:timestamptz" json:"createdAt"`
+}
+
+func (SpectrumEntry) TableName() string { return "spectrum_entries" }
+
 // DefaultLampSteps LAMP 标准 5 步流程（规格书 3.3.2.1）
 func DefaultLampSteps() []string {
 	return []string{"采样", "DNA提取", "反应体系配制", "恒温反应", "结果判读"}

server-go/internal/model/molecular.go

@@ -0,0 +1,49 @@
+package model
+
+import (
+	"errors"
+	"path/filepath"
+	"strings"
+)
+
+const maxSpectrumSize = 5 << 20 // 5MB
+
+// ValidDetectionMethod 检测方式枚举
+func ValidDetectionMethod(method string) bool {
+	switch method {
+	case "lamp", "qpcr", "sers", "hyperspectral":
+		return true
+	default:
+		return false
+	}
+}
+
+// JudgeQPCR qPCR Ct 值自动判读：任一 Ct < threshold 判阳性，无 Ct 判阴性
+func JudgeQPCR(cts []float64, threshold float64) (string, string) {
+	if threshold <= 0 {
+		threshold = 35
+	}
+	if len(cts) == 0 {
+		return "negative", "未检出 Ct 值，判为阴性"
+	}
+	for _, ct := range cts {
+		if ct < threshold {
+			return "positive", "存在 Ct 值低于阈值，判为阳性"
+		}
+	}
+	return "negative", "全部 Ct 值不低于阈值，判为阴性"
+}
+
+// ValidateSpectrumFile 光谱数据文件校验（csv/txt/json，≤5MB）
+func ValidateSpectrumFile(filename string, size int64) error {
+	if size <= 0 || size > maxSpectrumSize {
+		return errors.New("光谱文件大小需在 1B~5MB 之间")
+	}
+	ext := strings.ToLower(filepath.Ext(filename))
+	switch ext {
+	case ".csv", ".txt", ".json":
+		return nil
+	default:
+		return errors.New("仅支持 csv/txt/json 光谱数据文件")
+	}
+}

server-go/internal/model/molecular_test.go

@@ -0,0 +1,45 @@
+package model
+
+import "testing"
+
+func TestJudgeQPCR(t *testing.T) {
+	cases := []struct {
+		name      string
+		cts       []float64
+		threshold float64
+		want      string
+	}{
+		{"Ct32 阳性", []float64{32}, 35, "positive"},
+		{"Ct38 阴性", []float64{38}, 35, "negative"},
+		{"无Ct 阴性", nil, 35, "negative"},
+		{"多个Ct含阳性", []float64{33, 37}, 35, "positive"},
+		{"自定义阈值40", []float64{38}, 40, "positive"},
+		{"阈值为0用默认35", []float64{38}, 0, "negative"},
+	}
+	for _, c := range cases {
+		got, reason := JudgeQPCR(c.cts, c.threshold)
+		if got != c.want {
+			t.Errorf("%s: result=%s, want %s（原因 %s）", c.name, got, c.want, reason)
+		}
+		if reason == "" {
+			t.Errorf("%s: 缺少判读说明", c.name)
+		}
+	}
+}
+
+func TestValidateSpectrumFile(t *testing.T) {
+	for _, name := range []string{"a.csv", "b.txt", "c.json"} {
+		if err := ValidateSpectrumFile(name, 1024); err != nil {
+			t.Errorf("%s 应被允许: %v", name, err)
+		}
+	}
+	if err := ValidateSpectrumFile("a.jpg", 1024); err == nil {
+		t.Error("图片扩展名不应被允许")
+	}
+	if err := ValidateSpectrumFile("a.csv", 0); err == nil {
+		t.Error("空文件应被拒绝")
+	}
+	if err := ValidateSpectrumFile("a.csv", maxSpectrumSize+1); err == nil {
+		t.Error("超 5MB 应被拒绝")
+	}
+}