Add Netx Ops i18n and promote settings to a dedicated section.

Localize alarm prompts and UI reason codes for zh/en, and restyle the settings page like uds-auth as its own settings.section.

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

test/alarm-push.test.mjs

@@ -35,3 +35,21 @@ test('formatAlarmPrompt keeps human fields without raw sockets', () => {
   assert.match(text, /PE1 \(10\.0\.0\.1\)/)
   assert.match(text, /请分析这条关键告警/)
 })
+
+test('formatAlarmPrompt switches to English when lang starts with en', () => {
+  const text = formatAlarmPrompt({
+    action: 'deleted',
+    rule_label: 'Power Down',
+    object_name: 'PORT-1',
+    perceived_severity: 'critical',
+    native_probable_cause: 'LOS',
+    time_created: '2026-01-01T00:00:00Z',
+    notification_id: 'n1',
+    alarm_key: 'k1',
+    ne: { host_name: 'PE1', ip_address: '10.0.0.1' },
+  }, 'en-US')
+  assert.match(text, /Alarm Cleared/)
+  assert.match(text, /Device: PE1 \(10\.0\.0\.1\)/)
+  assert.match(text, /Please analyze this key alarm/)
+  assert.doesNotMatch(text, /告警/)
+})

test/i18n.test.mjs

@@ -0,0 +1,39 @@
+import assert from 'node:assert/strict'
+import { test } from 'node:test'
+
+import {
+  alarmActionLabel,
+  normalizeNetxLocale,
+  tHost,
+} from '../src/netx/i18n.ts'
+import { getSessionsExportStatus } from '../src/netx/session-export.ts'
+
+test('normalizeNetxLocale defaults to zh and accepts en tags', () => {
+  assert.equal(normalizeNetxLocale(undefined), 'zh')
+  assert.equal(normalizeNetxLocale(''), 'zh')
+  assert.equal(normalizeNetxLocale('zh-CN'), 'zh')
+  assert.equal(normalizeNetxLocale('en'), 'en')
+  assert.equal(normalizeNetxLocale('en-US'), 'en')
+  assert.equal(normalizeNetxLocale('english'), 'en')
+})
+
+test('tHost localizes alarm session titles', () => {
+  assert.equal(tHost('alarm.sessionTitle', 'zh'), 'Netx 关键告警')
+  assert.equal(tHost('alarm.sessionTitle', 'en'), 'Netx key alarm')
+  assert.equal(alarmActionLabel('inserted', 'en'), 'Alarm Raised')
+})
+
+test('getSessionsExportStatus returns reasonCode for UI i18n', async () => {
+  const missing = await getSessionsExportStatus({ get: () => undefined })
+  assert.equal(missing.available, false)
+  assert.equal(missing.reasonCode, 'no_persistence')
+
+  const noRaw = await getSessionsExportStatus({
+    get: () => ({
+      supportsRawArtifacts: false,
+      list: async () => [],
+      readRaw: async () => undefined,
+    }),
+  })
+  assert.equal(noRaw.reasonCode, 'no_raw_artifacts')
+})