feat(channel): 渠道管理系统 — 多模式定价 + 统一计费解析

Cherry-picked from release/custom-0.1.106: a9117600

backend/internal/server/routes/admin.go

@@ -87,6 +87,9 @@ func RegisterAdminRoutes(
 
 		// 定时测试计划
 		registerScheduledTestRoutes(admin, h)
+
+		// 渠道管理
+		registerChannelRoutes(admin, h)
 	}
 }
 
@@ -567,3 +570,14 @@ func registerTLSFingerprintProfileRoutes(admin *gin.RouterGroup, h *handler.Hand
 		profiles.DELETE("/:id", h.Admin.TLSFingerprintProfile.Delete)
 	}
 }
+
+func registerChannelRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
+	channels := admin.Group("/channels")
+	{
+		channels.GET("", h.Admin.Channel.List)
+		channels.GET("/:id", h.Admin.Channel.GetByID)
+		channels.POST("", h.Admin.Channel.Create)
+		channels.PUT("/:id", h.Admin.Channel.Update)
+		channels.DELETE("/:id", h.Admin.Channel.Delete)
+	}
+}