Add Network Management module with collapsible left nav.

Consolidate devices, topology, alarms, WebCRT, and collection tasks under /network; keep legacy path redirects and workbench entry.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/i18n/en.ts

@@ -23,6 +23,8 @@ const en = {
     cards: {
       umeSync: "UME Sync",
       umeSyncDesc: "UME alarms, subscription & inventory",
+      network: "Network Management",
+      networkDesc: "Devices, topology, alarms, WebCRT, and monitoring tasks",
       managedNe: "NE Management",
       managedNeDesc: "Multi-vendor SSH/Telnet NEs & connectivity test",
       collect: "Batch Collect",
@@ -39,9 +41,33 @@ const en = {
       apiKeysDesc: "Issue MCP/script tokens per user with expiry",
     },
   },
+  network: {
+    title: "Network Management",
+    nav: {
+      detail: "Network details",
+      tasks: "Monitoring tasks",
+      devices: "Device list",
+      topology: "Topology",
+      alarms: "Alarms",
+      webcrt: "WebCRT",
+      configSync: "Collection tasks",
+      portTraffic: "Port traffic",
+    },
+    placeholder: {
+      title: "Coming soon",
+      body: "This capability is not available yet.",
+      portTrafficTitle: "Port traffic monitoring",
+      portTrafficBody: "Planned: collect per-port traffic on a schedule and show trends. Suggested path:",
+      portTrafficStep1: "Task definition: NE/port scope, interval, retention",
+      portTrafficStep2: "Collection: prefer CLI (display/show interface); SNMP later at scale",
+      portTrafficStep3: "Storage: time series or hourly rollups (in/out bps, errors)",
+      portTrafficStep4: "UI: task list + per-port trend charts",
+    },
+  },
   layout: {
     title: "UME Integration",
     titleUme: "UME Sync",
+    titleNetwork: "Network Management",
     titleManagedNe: "NE Management",
     titleCollect: "Batch Collect",
     titleWebcrt: "WebCRT",
@@ -614,6 +640,7 @@ const en = {
     },
     alarms: {
       title: "Current alarms",
+      movedHint: "Current alarm query moved to Network Management →",
       showPanel: "Expand",
       hidePanel: "Collapse",
       keywordPh: "keyword(alarm key/cause/ne_name/host_name/ip…)",