fix: favicon .ico 生成 + README 更新 + run.sh kubernetes 别名

- 新增 frontend/public/favicon.ico (4 size: 16/32/48/64)
- index.html .ico 引用调整到 .svg 前面（兼容旧浏览器）
- README.md 全量更新：Kubernetes 完整命令列表 + K8s 管理亮点
- run.sh 主入口添加 k8s 别名（向后兼容）
- aiops-development skill 更新部署命令和 favicon 文档

backend/internal/api/handlers/agent.go

@@ -540,7 +540,7 @@ func (h *AgentHandler) GetPortPolicyForAgent(c *gin.Context) {
 	hostname := c.Query("hostname")
 	if hostname == "" {
 		c.JSON(http.StatusOK, models.Response{Code: 200, Message: "success", Data: models.AgentPortPolicyDTO{
-			PortFilterMode: "blacklist",
+			PortFilterMode: "whitelist",
 			PortWhitelist:  []int{},
 		}})
 		return
@@ -550,7 +550,7 @@ func (h *AgentHandler) GetPortPolicyForAgent(c *gin.Context) {
 	if err := h.db.Where("hostname = ?", hostname).First(&policy).Error; err != nil {
 		c.JSON(http.StatusOK, models.Response{Code: 200, Message: "success", Data: models.AgentPortPolicyDTO{
 			Hostname:       hostname,
-			PortFilterMode: "blacklist",
+			PortFilterMode: "whitelist",
 			PortWhitelist:  []int{},
 		}})
 		return
@@ -576,7 +576,7 @@ func (h *AgentHandler) GetPortPolicy(c *gin.Context) {
 	if err := h.db.Where("hostname = ?", hostname).First(&policy).Error; err != nil {
 		c.JSON(http.StatusOK, models.Response{Code: 200, Message: "success", Data: models.AgentPortPolicyDTO{
 			Hostname:       hostname,
-			PortFilterMode: "blacklist",
+			PortFilterMode: "whitelist",
 			PortWhitelist:  []int{},
 		}})
 		return