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/database/seed.go

@@ -114,7 +114,19 @@ func seedSampleData(db *gorm.DB) error {
 	plans := []model.Plan{
 		{
 			ProductID:  product.ID,
-			Name:       "Yearly",
+			Name:       "体验",
+			PlanType:   "trial",
+			Price:      0,
+			Currency:   "CNY",
+			Duration:   180,
+			MaxDevices: 1,
+			Features:   `["专业功能","体验","1 设备"]`,
+			SortOrder:  0,
+			Status:     1,
+		},
+		{
+			ProductID:  product.ID,
+			Name:       "包年",
 			PlanType:   "yearly",
 			Price:      99,
 			Currency:   "CNY",
@@ -126,7 +138,7 @@ func seedSampleData(db *gorm.DB) error {
 		},
 		{
 			ProductID:  product.ID,
-			Name:       "Perpetual",
+			Name:       "永久",
 			PlanType:   "perpetual",
 			Price:      199,
 			Currency:   "CNY",
@@ -136,18 +148,6 @@ func seedSampleData(db *gorm.DB) error {
 			SortOrder:  2,
 			Status:     1,
 		},
-		{
-			ProductID:  product.ID,
-			Name:       "Trial 180d",
-			PlanType:   "trial",
-			Price:      0,
-			Currency:   "USD",
-			Duration:   180,
-			MaxDevices: 1,
-			Features:   `["专业功能","半年体验","1 设备"]`,
-			SortOrder:  0,
-			Status:     1,
-		},
 	}
 	for i := range plans {
 		if err := db.Create(&plans[i]).Error; err != nil {
@@ -232,9 +232,9 @@ func ensureOpsXShellPlanPricing(db *gorm.DB) error {
 		sortOrder  int
 	}
 	updates := []planSpec{
-		{"yearly", "Yearly", 99, "CNY", 365, 2, "[\"专业功能\",\"包年\",\"2 设备\"]", 1},
-		{"perpetual", "Perpetual", 199, "CNY", 0, 5, "[\"专业功能\",\"永久授权\",\"5 设备\"]", 2},
-		{"trial", "Trial 180d", 0, "CNY", 180, 1, "[\"专业功能\",\"半年体验\",\"1 设备\"]", 0},
+		{"trial", "体验", 0, "CNY", 180, 1, "[\"专业功能\",\"体验\",\"1 设备\"]", 0},
+		{"yearly", "包年", 99, "CNY", 365, 2, "[\"专业功能\",\"包年\",\"2 设备\"]", 1},
+		{"perpetual", "永久", 199, "CNY", 0, 5, "[\"专业功能\",\"永久授权\",\"5 设备\"]", 2},
 	}
 	for _, u := range updates {
 		var plan model.Plan