feat(k8s): M14 Namespace 管理看板（资源配额 + 命名空间 CRUD）

- 后端: ListNamespacesDetailed/CreateNamespace/DeleteNamespace/ListResourceQuotas/ListLimitRanges
- 后端: GetNamespacesDetail handler (6 API calls aggregate, not N×3)
- 后端: CreateNamespaceHandler + DeleteNamespaceHandler (system NS protection)
- 前端: NamespaceManagementPage.tsx (~280行) — 表格+概览卡片+创建/删除弹框
- 路由: GET/POST/DELETE /:clusterCode/namespaces + GET /namespace/:ns/detail
- 验证: 9/9 通过 (urllib), TS 零错误, Vite 构建成功

backend/internal/models/agent.go

@@ -9,6 +9,7 @@ type AgentReport struct {
 	ID          uint      `gorm:"primarykey" json:"id"`
 	Hostname    string    `gorm:"size:255;index;not null" json:"hostname"`
 	CPUUsage    float64   `gorm:"type:decimal(6,2)" json:"cpu_usage"`
+	CPUIOwait   float64   `gorm:"type:decimal(6,2)" json:"cpu_iowait"`
 	CPUCores    int       `json:"cpu_cores"`
 	Load1       float64   `gorm:"type:decimal(8,2)" json:"load1"`
 	Load5       float64   `gorm:"type:decimal(8,2)" json:"load5"`
@@ -16,6 +17,8 @@ type AgentReport struct {
 	MemTotal    float64   `gorm:"type:decimal(10,2)" json:"mem_total"`
 	MemUsed     float64   `gorm:"type:decimal(10,2)" json:"mem_used"`
 	MemUsage    float64   `gorm:"type:decimal(6,2)" json:"mem_usage"`
+	MemAvailable float64  `gorm:"type:decimal(10,2)" json:"mem_available"`
+	MemSwapUsed  float64  `gorm:"type:decimal(10,2)" json:"mem_swap_used"`
 	DiskInfo    string    `gorm:"type:text" json:"disk_info"`
 	PortInfo    string    `gorm:"type:text" json:"port_info"`
 	NetInfo     string    `gorm:"type:text" json:"net_info"`
@@ -141,6 +144,7 @@ type SystemStatModel struct {
 
 type CPUMetric struct {
 	UsagePercent float64 `json:"usage_percent"`
+	IOWait       float64 `json:"iowait"`
 	CoreCount    int     `json:"core_count"`
 	Load1        float64 `json:"load1"`
 	Load5        float64 `json:"load5"`
@@ -151,15 +155,18 @@ type MemMetric struct {
 	TotalGB      float64 `json:"total_gb"`
 	UsedGB       float64 `json:"used_gb"`
 	CachedGB     float64 `json:"cached_gb"`
+	AvailableGB  float64 `json:"available_gb"`
+	SwapUsedGB   float64 `json:"swap_used_gb"`
 	UsagePercent float64 `json:"usage_percent"`
 }
 
 type DiskMetric struct {
-	Mount        string  `json:"mount"`
-	Device       string  `json:"device"`
-	TotalGB      float64 `json:"total_gb"`
-	UsedGB       float64 `json:"used_gb"`
-	UsagePercent float64 `json:"usage_percent"`
+	Mount         string  `json:"mount"`
+	Device        string  `json:"device"`
+	TotalGB       float64 `json:"total_gb"`
+	UsedGB        float64 `json:"used_gb"`
+	UsagePercent  float64 `json:"usage_percent"`
+	InodeUsagePct float64 `json:"inode_usage_pct"`
 }
 
 type PortMetric struct {
@@ -177,6 +184,8 @@ type NetworkStatModel struct {
 	NicName        string  `json:"nic_name"`
 	NetRxBPS       float64 `json:"net_rx_bps"`
 	NetTxBPS       float64 `json:"net_tx_bps"`
+	NetRxErrors    int64   `json:"net_rx_errors"`
+	NetTxErrors    int64   `json:"net_tx_errors"`
 }
 
 type DiskIOStatModel struct {
@@ -184,4 +193,25 @@ type DiskIOStatModel struct {
 	WriteBPS  float64 `json:"write_bps"`
 	ReadIOPS  float64 `json:"read_iops"`
 	WriteIOPS float64 `json:"write_iops"`
+	Util      float64 `json:"util"`
 }
+
+// AgentPortPolicy 主机端口监控策略 // Logan.Li
+type AgentPortPolicy struct {
+	ID              uint   `gorm:"primarykey" json:"id"`
+	Hostname        string `gorm:"size:255;uniqueIndex;not null" json:"hostname"`
+	PortFilterMode  string `gorm:"size:20;default:whitelist;not null" json:"port_filter_mode"`  // whitelist / blacklist
+	PortWhitelist   string `gorm:"type:text" json:"port_whitelist"`                              // JSON 数组，如 [80,443,3306,6379]
+}
+
+func (AgentPortPolicy) TableName() string {
+	return "monitor_agent_port_policy"
+}
+
+// AgentPortPolicyDTO 前端交互用的端口策略格式（含已解析的数组）
+type AgentPortPolicyDTO struct {
+	Hostname       string `json:"hostname"`
+	PortFilterMode string `json:"port_filter_mode"`
+	PortWhitelist  []int  `json:"port_whitelist"`
+}
+

backend/internal/models/agent_task.go

@@ -32,7 +32,7 @@ type AgentRule struct {
 	ID            uint           `gorm:"primarykey" json:"id"`
 	Name          string         `gorm:"size:255;not null" json:"name"`
 	Hostname      string         `gorm:"size:255" json:"hostname"`         // 空表示全部主机
-	Metric        string         `gorm:"size:32;not null" json:"metric"`   // cpu/mem/disk/offline/port_down/tcp_time_wait/tcp_close_wait/service_process
+	Metric        string         `gorm:"size:32;not null" json:"metric"`   // cpu/mem/disk/offline/port_down/tcp_time_wait/tcp_close_wait/service_process/fd
 	Operator      string         `gorm:"size:10;default:>" json:"operator"` // > >= < <= ==
 	Threshold     float64        `gorm:"type:decimal(10,2)" json:"threshold"`
 	Port          int            `json:"port"`                              // port_down 专用