feat(web): rebuild the console around the fused control plane

Render the Hub feature set in the existing Animal Island styling: fleet
messages, notification centre, log centre, organisation panel, per-instance
device module panels and the settings backup, connection and maintenance
surfaces.

apps/web/src/instances/overview-system.tsx

@@ -8,7 +8,7 @@ export type OverviewFieldValue = string | number | boolean | null;
 export type OverviewSection = Readonly<Record<string, OverviewFieldValue>>;
 
 export interface OverviewSnapshot {
-  readonly observedAt?: string;
+  readonly observedAt?: string | undefined;
   readonly device: OverviewSection;
   readonly sim: OverviewSection;
   readonly network: OverviewSection;
@@ -24,11 +24,11 @@ export interface OverviewDataSource {
 
 export interface OverviewSystemPageProps {
   readonly instance: InstanceContext;
-  readonly dataSource?: OverviewDataSource;
+  readonly dataSource?: OverviewDataSource | undefined;
   /** Change this value when an external owner has requested a refresh. */
-  readonly refreshSignal?: unknown;
-  readonly operationClient?: OperationClient;
-  readonly revision?: number;
+  readonly refreshSignal?: unknown | undefined;
+  readonly operationClient?: OperationClient | undefined;
+  readonly revision?: number | undefined;
 }
 
 type ReadState =
@@ -70,10 +70,86 @@ const FIELD_LABELS: Readonly<Record<string, string>> = {
   Temperature: '温度',
   State: '状态',
   Latency: '延迟',
+  // Device payloads arrive with their native snake_case field names.
+  model: '型号',
+  manufacturer: '制造商',
+  brand: '品牌',
+  imei: 'IMEI',
+  meid: 'MEID',
+  iccid: 'ICCID',
+  imsi: 'IMSI',
+  phone_number: '号码',
+  firmware_version: '固件版本',
+  os_version: '系统版本',
+  version: '版本',
+  baseband_version: '基带版本',
+  uptime: '运行时间',
+  uptime_seconds: '运行时间（秒）',
+  slots: '卡槽数',
+  active_slots: '活跃数',
+  active: '已激活',
+  enabled: '已启用',
+  operator: '运营商',
+  carrier: '运营商',
+  network_type: '接入制式',
+  technology: '技术',
+  radio_mode: '网络模式',
+  signal: '信号强度',
+  signal_dbm: '信号强度（dBm）',
+  signal_percent: '信号质量',
+  rsrp: 'RSRP',
+  rsrq: 'RSRQ',
+  sinr: 'SINR',
+  mcc: 'MCC',
+  mnc: 'MNC',
+  registration: '注册状态',
+  registration_state: '注册状态',
+  roaming: '漫游',
+  airplane_mode: '飞行模式',
+  ipv4: 'IPv4 地址',
+  ipv6: 'IPv6 地址',
+  ip_address: 'IP 地址',
+  gateway: '网关',
+  dns: 'DNS',
+  download: '下行速率',
+  upload: '上行速率',
+  download_bytes: '下行流量',
+  upload_bytes: '上行流量',
+  messages_today: '今日消息数',
+  calls: '通话数',
+  usage: '使用率',
+  temperature: '温度',
+  max_temperature_c: '最高温度',
+  cpu_percent: 'CPU 使用率',
+  cpu_load: 'CPU 负载',
+  memory_percent: '内存使用率',
+  memory_total_mb: '内存总量',
+  memory_available_mb: '可用内存',
+  battery_level: '电量',
+  battery_percent: '电量',
+  latency: '延迟',
+  connected: '连接状态',
+  interface: '网络接口',
+  ssid: '无线网络',
+  apn: 'APN',
 };
 
 const ENUM_LABELS: Readonly<Record<string, string>> = {
   connected: '已连接',
+  not_registered: '未注册',
+  attached: '已附着',
+  detached: '已分离',
+  enabled: '已启用',
+  disabled: '已停用',
+  true: '是',
+  false: '否',
+  lte: 'LTE',
+  nr: 'NR',
+  nr5g: '5G NR',
+  gsm: 'GSM',
+  wcdma: 'WCDMA',
+  td_scdma: 'TD-SCDMA',
+  evdo: 'EVDO',
   disconnected: '未连接',
   connecting: '正在连接',
   registered: '已注册',