feat: 通用授权后台、离线证、Waffo 支付页与仪表盘加强

支持多产品计划展示、LICOFF 离线签发、支付独立配置与调试，以及分析看板；同步更新 README 与集成文档。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/internal/controller/license/license_controller.go

@@ -1,6 +1,8 @@
 package license
 
 import (
+	"backend/config"
+	"backend/internal/dto"
 	licenseservice "backend/internal/service/license"
 	"backend/utils"
 	"net/http"
@@ -12,13 +14,18 @@ import (
 
 // LicenseController License 控制器 // Logan.Li
 type LicenseController struct {
-	svc *licenseservice.LicenseService
-	db  *gorm.DB
+	svc     *licenseservice.LicenseService
+	offline *licenseservice.OfflineIssuer
+	db      *gorm.DB
 }
 
 // NewLicenseController 创建控制器实例 // Logan.Li
-func NewLicenseController(db *gorm.DB) *LicenseController {
-	return &LicenseController{svc: licenseservice.NewLicenseService(db), db: db}
+func NewLicenseController(db *gorm.DB, cfg *config.Config) *LicenseController {
+	return &LicenseController{
+		svc:     licenseservice.NewLicenseService(db),
+		offline: licenseservice.NewOfflineIssuer(db, cfg),
+		db:      db,
+	}
 }
 
 // parseListQuery 从请求解析筛选参数 // Logan.Li
@@ -26,6 +33,7 @@ func parseListQuery(c *gin.Context) licenseservice.ListQuery {
 	q := licenseservice.ListQuery{
 		Keyword: c.Query("keyword"),
 		Status:  c.Query("status"),
+		Channel: c.Query("channel"),
 	}
 	if v, err := strconv.ParseUint(c.Query("customer_id"), 10, 32); err == nil {
 		q.CustomerID = uint(v)
@@ -65,16 +73,7 @@ func (ctrl *LicenseController) Get(c *gin.Context) {
 
 // Create 创建 License // Logan.Li
 func (ctrl *LicenseController) Create(c *gin.Context) {
-	var req struct {
-		CustomerID     uint   `json:"customer_id" binding:"required"`
-		ProductID      uint   `json:"product_id" binding:"required"`
-		Duration       int    `json:"duration" binding:"required"`
-		MaxActivations int    `json:"max_activations"`
-		IsTrial        bool   `json:"is_trial"`
-		TrialDays      int    `json:"trial_days"`
-		Notes          string `json:"notes"`
-		Count          int    `json:"count"`
-	}
+	var req dto.LicenseCreate
 	if err := c.ShouldBindJSON(&req); err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误: " + err.Error()})
 		return
@@ -89,6 +88,36 @@ func (ctrl *LicenseController) Create(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "创建成功", "data": licenses})
 }
 
+// IssueOffline 签发离线许可证序列号（最长 365 天，绑定 device_id） // Logan.Li
+func (ctrl *LicenseController) IssueOffline(c *gin.Context) {
+	var req dto.OfflineLicenseCreate
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误: " + err.Error()})
+		return
+	}
+	result, err := ctrl.offline.Issue(req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "create_offline", "license", result.LicenseID, result.Serial, "", "",
+		"签发离线证 device="+result.DeviceID)
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "离线许可证已生成", "data": result})
+}
+
+// OfflinePublicKey 返回当前离线验签公钥（供运维核对桌面嵌入值） // Logan.Li
+func (ctrl *LicenseController) OfflinePublicKey(c *gin.Context) {
+	pub := ""
+	if ctrl.offline != nil {
+		pub = ctrl.offline.PublicKeyHex()
+	}
+	if pub == "" {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": "未配置 OFFLINE_LICENSE_SEED"})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"code": 0, "data": gin.H{"public_key_hex": pub}})
+}
+
 // Update 更新 License // Logan.Li
 func (ctrl *LicenseController) Update(c *gin.Context) {
 	id, _ := strconv.ParseUint(c.Param("id"), 10, 32)