diff --git a/frontend/src/locales/en-US.json b/frontend/src/locales/en-US.json
index 2e4e76d..8a1dedb 100644
--- a/frontend/src/locales/en-US.json
+++ b/frontend/src/locales/en-US.json
@@ -3262,7 +3262,406 @@
     "prometheusdashb.sb0f653eb": "内存 Top 10",
     "prometheusdashb.s5e8eb212": "连接中…",
     "zabbixdashboard.sdb131ab4": "未找到被监控的 Zabbix 主机",
-    "zabbixdashboard.s5dc99f6e": "问题"
+    "zabbixdashboard.s5dc99f6e": "问题",
+    "alertChannel": {
+      "addBtn": "Add Channel",
+      "addTitle": "Add Notification Channel",
+      "added": "Channel added",
+      "configJson": "Config (JSON)",
+      "dialogDesc": "Configure alert notification channels (DingTalk/WeChat/Email/SMS/Webhook)",
+      "editTitle": "Edit Notification Channel",
+      "hintDingtalk": "DingTalk bot: webhook URL + secret",
+      "hintEmail": "Email: {\"to\":\"ops@ezops.io\"}",
+      "hintFeishu": "Feishu bot: {\"url\":\"https://open.feishu.cn/open-apis/bot/v2/hook/...\"}",
+      "hintSms": "SMS: {\"phones\":\"13800138000\"}",
+      "hintWebhook": "Webhook: {\"url\":\"https://...\"}",
+      "hintWechat": "WeCom bot: webhook URL",
+      "namePlaceholder": "e.g., Ops Alert Group",
+      "nameRequired": "Channel Name *",
+      "saveChanges": "Save Changes",
+      "saving": "Saving...",
+      "typeDingtalk": "DingTalk",
+      "typeEmail": "Email",
+      "typeFeishu": "Feishu",
+      "typeLabel": "Channel Type",
+      "typeSms": "SMS",
+      "typeWebhook": "Webhook",
+      "typeWechat": "WeCom",
+      "updated": "Channel updated"
+    },
+    "alertChannels": {
+      "addChannel": "Add Channel",
+      "deleteConfirm": "Delete this notification channel?",
+      "deleteFailed": "Delete failed",
+      "deleteTitle": "Delete Notification Channel",
+      "deleted": "Channel deleted",
+      "disabled": "Disabled",
+      "empty": "No notification channels yet. Click \"Add Channel\" to create.",
+      "fetchFailed": "Failed to fetch notification channels",
+      "testFailed": "Test failed",
+      "testNoConfig": "Channel not configured. Please complete config first.",
+      "testPassed": "Test passed",
+      "testSent": "Test notification sent",
+      "typeLabel": "Type"
+    },
+    "alertHelper": {
+      "alertIdFallback": "Alert #{{id}}",
+      "chDingtalk": "DingTalk",
+      "chEmail": "Email",
+      "chFeishu": "Feishu",
+      "chSms": "SMS",
+      "chWebhook": "Webhook",
+      "chWechat": "WeCom",
+      "sevCritical": "Critical",
+      "sevInfo": "Info",
+      "sevWarning": "Warning",
+      "srcHost": "Host Monitor",
+      "srcLog": "Log Alert",
+      "srcMiddleware": "Middleware Monitor",
+      "srcSite": "Site Probe",
+      "srcSnmp": "SNMP Monitor",
+      "statusAcknowledged": "Acknowledged",
+      "statusFiring": "Firing",
+      "statusResolved": "Resolved",
+      "statusSuppressed": "Suppressed"
+    },
+    "alertRulesTab": {
+      "addRule": "Add Rule",
+      "catHost": "Host Monitoring",
+      "catHostDesc": "Agent CPU/Memory/Disk/Offline",
+      "catMiddleware": "Middleware",
+      "catMiddlewareDesc": "Redis / MySQL metrics",
+      "catSite": "Site Probe",
+      "catSiteDesc": "HTTP/HTTPS availability & certificate",
+      "catSnmp": "SNMP",
+      "catSnmpDesc": "Network devices / BMC",
+      "defaultRules": "Default Rules",
+      "disabled": "Disabled",
+      "emptyDesc": "Click \"Add Rule\" or \"Default Rules\" to create",
+      "emptyTitle": "No {{cat}} rules",
+      "loading": "Loading rules..."
+    },
+    "contactDialog": {
+      "addContactBtn": "Add Contact",
+      "addTitle": "Add Alert Contact",
+      "channelPlaceholder": "Select channel type",
+      "channelTypeRequired": "Channel Type *",
+      "contactAdded": "Contact added",
+      "contactUpdated": "Contact updated",
+      "customWebhook": "Custom Webhook",
+      "dialogDesc": "Select notification channel and enter the Webhook URL",
+      "editTitle": "Edit Alert Contact",
+      "emailLabel": "Email",
+      "feishu": "Feishu",
+      "namePlaceholder": "e.g., John Doe",
+      "nameRequired": "Name *",
+      "phoneLabel": "Phone",
+      "saveChanges": "Save Changes",
+      "saving": "Saving...",
+      "webhookRequired": "Webhook URL *"
+    },
+    "contactGroup": {
+      "addBtn": "Add Contact Group",
+      "addTitle": "Add Alert Contact Group",
+      "added": "Contact group added",
+      "dialogDesc": "Configure alert contact group and select members",
+      "editTitle": "Edit Alert Contact Group",
+      "namePlaceholder": "e.g., Ops On-Call Team",
+      "nameRequired": "Group Name *",
+      "noContacts": "No contacts. Please add in \"Alert Contacts\" tab first.",
+      "notes": "Notes",
+      "notesPlaceholder": "e.g., Mon-Fri 9:00-21:00",
+      "saveChanges": "Save Changes",
+      "saving": "Saving...",
+      "selectContacts": "Select Contacts",
+      "selectedCount": "{{count}} contacts selected",
+      "updated": "Contact group updated"
+    },
+    "hostDashboard": {
+      "agentOnline": "Agent Online",
+      "alert": "Alert",
+      "avgCpu": "Avg CPU",
+      "avgMemory": "Avg Memory",
+      "colAgentStatus": "Agent Status",
+      "colAgentVersion": "Agent Version",
+      "colHostId": "Hostname/ID",
+      "colIp": "IP Address",
+      "colRegion": "Region",
+      "cpuTop5": "CPU Usage Top 5",
+      "hostTotal": "Total Hosts",
+      "listTitle": "Host Monitoring List",
+      "memTop5": "Memory Usage Top 5",
+      "monitor": "Monitor",
+      "noData": "No host data",
+      "noDataDesc": "Please add a server first or wait for Agent data",
+      "perPage": "Per Page",
+      "realtime": "Realtime",
+      "searchPlaceholder": "Search hostname/IP...",
+      "threshold": "Threshold: 60% / 85%",
+      "totalCount": "items, {{count}} total",
+      "viewAlertRules": "View Alert Rules",
+      "viewMonitorChart": "View Monitor Charts"
+    },
+    "logPanel": {
+      "apiNotFound": "API not found",
+      "authFailed": "Authentication failed",
+      "chartCountLabel": "Count",
+      "chartCountSuffix": "log entries",
+      "chartTimePrefix": "Time:",
+      "connFailed": "Connection failed",
+      "copied": "Copied",
+      "copiedDesc": "{{count}} log entries on current page",
+      "copyFailed": "Copy failed",
+      "copyFailedDesc": "Please use export or expand individual entries",
+      "custom": "Custom",
+      "defaultSuffix": " (default)",
+      "emptyHint": "Enter a query and click \"Query\" to view results",
+      "exported": "Exported",
+      "exportedDesc": "{{count}} log entries",
+      "history": "Query History",
+      "last5min": "Last 5 minutes",
+      "limit": "Limit",
+      "liveTailTitle": "Live Tail - refreshes last 5 min every 3 seconds",
+      "loadMoreFailed": "Load more failed",
+      "logResults": {
+        "addLabelFilter": "Add to query",
+        "collapseAll": "Collapse All",
+        "commonLabels": "Common Labels",
+        "content": "Content",
+        "contextTitle": "Context",
+        "copiedFullLog": "Full log copied",
+        "copyAll": "Copy All",
+        "copyFailedExpandDesc": "Please expand and manually select to copy",
+        "copyFullLog": "Copy Full Log",
+        "copyLine": "Copy",
+        "copyLineDesc": "Copy this line",
+        "excludeLabelFilter": "Exclude this value",
+        "expandAll": "Expand All",
+        "fullLog": "Full Log",
+        "hideLabels": "Hide Labels",
+        "jsonFormat": "JSON Format",
+        "labels": "Labels",
+        "level": "Level",
+        "lineNo": "Line No.",
+        "loading": "Loading...",
+        "noLabels": "No Labels",
+        "noLogs": "No Logs",
+        "noResults": "No log data",
+        "raw": "Raw",
+        "showLabels": "Show Labels",
+        "source": "Source",
+        "time": "Time",
+        "viewContext": "View Context"
+      },
+      "noDatasource": "No {{name}} datasource available",
+      "noDatasourceHint": "No {{name}} datasource. Please add one in \"Log Library\" first.",
+      "noMatch": "No matching log entries found",
+      "noMatchDesc": "Query executed ({{ms}}ms), no results match current filters",
+      "query": "Query",
+      "queryFailed": "Query failed",
+      "requeries": "Retry Query",
+      "saveAs": "Save As",
+      "saveAsAlertItem": "Alert",
+      "saveAsQueryItem": "Query",
+      "savedQueries": "Saved Queries",
+      "share": "Share",
+      "shareCopied": "Share link copied",
+      "shareCopiedDesc": "Recipients open the link to auto-execute the query",
+      "shareCopyFailed": "Copy failed",
+      "shareLinkTitle": "Copy Share Link",
+      "tabCluster": "Log Clusters",
+      "tabLogs": "Raw Logs",
+      "tabStats": "Statistics",
+      "truncate": "Truncate Preview",
+      "truncateTitle": "Collapsed rows show only first 500 characters",
+      "viewField": "Field View",
+      "viewRaw": "Raw Logs",
+      "viewTable": "Table View",
+      "wrapLines": "Wrap Lines",
+      "wrapLinesTitle": "Auto-wrap long log entries"
+    },
+    "metricCatalog": {
+      "colCrit": "Critical Threshold",
+      "colDesc": "Description",
+      "colMax": "Max",
+      "colMetric": "Metric",
+      "colType": "Type",
+      "colUnit": "Unit",
+      "colWarn": "Warning Threshold",
+      "desc": "Collectible metrics for Host / Middleware / SNMP / Site Probe, with default alert thresholds"
+    },
+    "monitorRule": {
+      "catMiddleware": "Middleware",
+      "catSite": "Site Probe",
+      "dialogDesc": "Configure threshold alerts based on monitoring metrics",
+      "editRuleTitle": "Edit {{cat}} Alert Rule",
+      "enableRule": "Enable Rule",
+      "metricLabel": "Metric",
+      "nameMetricRequired": "Please fill in rule name and metric",
+      "namePlaceholder": "e.g., Redis connection count too high",
+      "newRuleTitle": "New {{cat}} Alert Rule",
+      "opEq": "= Equal to",
+      "opGt": "> Greater than",
+      "opGte": ">= Greater or equal",
+      "opLt": "< Less than",
+      "opLte": "<= Less or equal",
+      "ruleCreated": "Rule created",
+      "ruleUpdated": "Rule updated",
+      "thresholdLabel": "Threshold"
+    },
+    "notifyPolicy": {
+      "cardFooter": "Card Footer",
+      "catHost": "Host Monitoring",
+      "catHostDesc": "Agent CPU/Memory/Disk/Offline",
+      "catMiddleware": "Middleware Monitoring",
+      "catMiddlewareDesc": "Redis/MySQL metrics",
+      "catSite": "Site Probe",
+      "catSiteDesc": "HTTP/TCP/DNS probe failures and latency",
+      "catSnmp": "SNMP Monitoring",
+      "catSnmpDesc": "H3C/Huawei/Cisco/Ruijie/Dell/Inspur",
+      "disable": "Disable",
+      "extraContacts": "Extra Contacts",
+      "fallbackHint": "If unconfigured, falls back to global Feishu channel in \"Notification Channels\".",
+      "loadFailed": "Failed to load notification policies",
+      "loading": "Loading notification policies...",
+      "msgTemplateTitle": "Message Template",
+      "noContacts": "No contacts",
+      "noGroups": "No contact groups",
+      "noTargetHint": "Please create targets in \"Alert Contacts\" and \"Contact Groups\" first.",
+      "notifyGroups": "Notify Groups",
+      "platformName": "Platform Signature",
+      "preview": "Preview",
+      "saveAll": "Save All",
+      "saved": "Notification config saved",
+      "selectedSummary": "{{groups}} groups + {{contacts}} contacts selected",
+      "testFailed": "Test failed. Check policy and contacts.",
+      "testSent": "Test notification sent",
+      "titleTemplate": "Title Template",
+      "topDesc": "Configure default notification targets by monitoring type. Templates apply to Feishu card titles and footer.",
+      "unsaved": "Unsaved"
+    },
+    "promDs": {
+      "caCertPlaceholder": "PEM format CA certificate content...",
+      "configDesc": "Prometheus datasource config (similar to Grafana)",
+      "createSuccess": "Datasource created",
+      "namePlaceholder": "Prometheus datasource name",
+      "nameRequired": "Please enter a datasource name",
+      "noHeaders": "No custom headers",
+      "opFailed": "Operation failed",
+      "password": "Password",
+      "queryParamsPlaceholder": "e.g.: {\"timeout\": \"30s\"}",
+      "saveTest": "Save & Test",
+      "second": "seconds",
+      "testFailed": "Test failed",
+      "updateSuccess": "Datasource updated",
+      "urlInputRequired": "Please enter a URL first",
+      "urlRequired": "Please enter a Prometheus URL",
+      "username": "Username"
+    },
+    "silenceDialog": {
+      "createTitle": "Create Silence Rule",
+      "dailyEnd": "Daily End",
+      "dailyStart": "Daily Start",
+      "descPlaceholder": "Optional notes",
+      "dialogDesc": "Alerts matching silence rules will not trigger notifications during silence period",
+      "editTitle": "Edit Silence Rule",
+      "effectiveWeekdays": "Effective Weekdays",
+      "endTime": "End Time",
+      "endTimeRequired": "Please set an end time",
+      "fri": "Fri",
+      "hintDaily": "Silence alerts during specified hours daily. Good for off-hours do-not-disturb.",
+      "hintOnetime": "Matching alerts silenced within the time window. Resumes automatically after window ends.",
+      "hintWeekly": "Silence only on selected weekdays during specified hours. Good for weekend maintenance.",
+      "mon": "Mon",
+      "namePlaceholder": "e.g., Maintenance Window Silence",
+      "nameRequired": "Please enter a rule name",
+      "ruleNameRequired": "Rule Name *",
+      "sat": "Sat",
+      "saving": "Saving...",
+      "silenceCreated": "Silence rule created",
+      "silenceType": "Silence Type",
+      "silenceUpdated": "Silence rule updated",
+      "startTime": "Start Time",
+      "sun": "Sun",
+      "thu": "Thu",
+      "tue": "Tue",
+      "typeDaily": "Daily Recurring",
+      "typeOnetime": "One-time",
+      "typeWeekly": "Weekly Recurring",
+      "wed": "Wed",
+      "weekdayRequired": "Weekly silence requires at least one weekday"
+    },
+    "silenceRules": {
+      "active": "Active",
+      "addRule": "Add Silence Rule",
+      "createdAt": "Created {{time}}",
+      "dailyPrefix": "Daily",
+      "dayFri": "F",
+      "dayMon": "M",
+      "daySat": "S",
+      "daySun": "S",
+      "dayThu": "T",
+      "dayTue": "T",
+      "dayWed": "W",
+      "deleteConfirm": "Delete \"{{name}}\"?",
+      "deleteConfirmRestore": "Delete \"{{name}}\"? Alerts will resume after deletion.",
+      "deleteFailed": "Delete failed",
+      "deleteTitle": "Delete Silence Rule",
+      "deleted": "Deleted",
+      "disabled": "Disabled",
+      "disabledBadge": "Disabled",
+      "empty": "No silence rules. Alerts sent per notification policy.",
+      "emptyHint": "Click \"Add Silence Rule\" to create a maintenance window",
+      "emptyShort": "No silence rules",
+      "enabled": "Enabled",
+      "fetchFailed": "Failed to fetch silence rules",
+      "subtitle": "Maintenance windows / Do-not-disturb",
+      "title": "Silence Rules",
+      "totalCount": "{{count}} rules total",
+      "typeDaily": "Daily",
+      "typeOnetime": "One-time",
+      "typeWeekly": "Weekly",
+      "weekPrefix": "Wk"
+    },
+    "traceMgr": {
+      "allServices": "All Services",
+      "avgLatency": "Avg Latency",
+      "colServiceOperation": "Service / Operation",
+      "day7": "7 days",
+      "errorRate": "Error Rate",
+      "errorTrend": "Error Rate Trend",
+      "errorTrendChart": "Error rate trend chart (shown after chart library integration)",
+      "fetchDetailFailed": "Failed to fetch trace detail",
+      "fetchServicesFailed": "Failed to fetch service data",
+      "fetchTracesFailed": "Failed to fetch trace data",
+      "hour1": "1 hour",
+      "hour24": "24 hours",
+      "hour6": "6 hours",
+      "inProgress": "In Progress",
+      "latencyDist": "Latency Distribution",
+      "latencyDistChart": "Latency distribution chart (shown after chart library integration)",
+      "loadingTraces": "Loading trace data...",
+      "logs": "Logs",
+      "min15": "15 minutes",
+      "noTraces": "No trace data",
+      "p95Latency": "P95 Latency",
+      "p99Latency": "P99 Latency",
+      "requestCount": "Requests",
+      "searchPlaceholder": "Search Trace ID, operation name...",
+      "serviceCount": "Services",
+      "serviceName": "Service Name",
+      "servicePerfTitle": "Service Performance Overview",
+      "spanCount": "Spans",
+      "spanDetailTitle": "Span Detail",
+      "spanName": "Span Name",
+      "subtitle": "Distributed trace query and service performance analysis",
+      "tabMetrics": "Performance Metrics",
+      "tabServices": "Service Topology",
+      "tabTraces": "Traces",
+      "totalDuration": "Total Duration",
+      "totalRequests": "Total Requests",
+      "traceDetailTitle": "Trace Detail"
+    }
   },
   "task": {
     "cronJob": {
@@ -6140,4 +6539,4 @@
     "assistantts.s16f94bee": "流式响应不可用",
     "assistantts.sfeeaa489": "LLM 流式响应错误"
   }
-}
\ No newline at end of file
+}
diff --git a/scripts/i18n-verify-keys.py b/scripts/i18n-verify-keys.py
new file mode 100644
index 0000000..c88803e
--- /dev/null
+++ b/scripts/i18n-verify-keys.py
@@ -0,0 +1,93 @@
+#!/usr/bin/env python3
+"""
+i18n-verify-keys.py — Detect missing/extra translation keys between zh-CN and en-US.
+
+Usage:
+    python3 scripts/i18n-verify-keys.py          # Report only
+    python3 scripts/i18n-verify-keys.py --fix     # Copy zh-CN values as placeholder
+
+Exit code: 0 if keys are in sync, 1 if there are missing keys.
+"""
+import json
+import sys
+import os
+import argparse
+
+def flatten(d, prefix=''):
+    items = {}
+    for k, v in d.items():
+        full = f'{prefix}.{k}' if prefix else k
+        if isinstance(v, dict):
+            items.update(flatten(v, full))
+        else:
+            items[full] = v
+    return items
+
+def set_nested(d, key_path, value):
+    parts = key_path.split('.')
+    current = d
+    for part in parts[:-1]:
+        if part not in current or not isinstance(current[part], dict):
+            current[part] = {}
+        current = current[part]
+    current[parts[-1]] = value
+
+def main():
+    parser = argparse.ArgumentParser(description='Verify i18n key parity between zh-CN and en-US')
+    parser.add_argument('--fix', action='store_true', help='Copy zh-CN values as placeholder for missing en-US keys')
+    args = parser.parse_args()
+
+    base = os.path.join(os.path.dirname(__file__), '..', 'frontend', 'src', 'locales')
+    zh_path = os.path.join(base, 'zh-CN.json')
+    en_path = os.path.join(base, 'en-US.json')
+
+    zh = json.load(open(zh_path))
+    en = json.load(open(en_path))
+
+    zh_flat = flatten(zh)
+    en_flat = flatten(en)
+
+    missing_en = sorted(set(zh_flat) - set(en_flat))
+    extra_en = sorted(set(en_flat) - set(zh_flat))
+
+    print(f'zh-CN keys: {len(zh_flat)}')
+    print(f'en-US keys: {len(en_flat)}')
+    print(f'Missing in en-US: {len(missing_en)}')
+    print(f'Extra in en-US:   {len(extra_en)}')
+
+    if missing_en:
+        # Group by namespace
+        ns = {}
+        for k in missing_en:
+            prefix = k.split('.')[0] + '.' + k.split('.')[1] if '.' in k else k
+            ns[prefix] = ns.get(prefix, 0) + 1
+        print('\nMissing by sub-namespace:')
+        for k, v in sorted(ns.items()):
+            print(f'  {k}.* : {v} keys')
+
+        print('\nFirst 20 missing keys:')
+        for k in missing_en[:20]:
+            print(f'  - {k} = {zh_flat[k]}')
+
+    if extra_en:
+        print('\nExtra en-US keys (not in zh-CN):')
+        for k in extra_en[:10]:
+            print(f'  + {k}')
+
+    if args.fix and missing_en:
+        for key in missing_en:
+            set_nested(en, key, zh_flat[key])
+        with open(en_path, 'w', encoding='utf-8') as f:
+            json.dump(en, f, ensure_ascii=False, indent=2)
+            f.write('\n')
+        print(f'\n[fix] Copied {len(missing_en)} zh-CN values as en-US placeholders.')
+        print('[fix] NOTE: Replace with proper English translations!')
+
+    if missing_en or extra_en:
+        sys.exit(1)
+    else:
+        print('\n✅ zh-CN and en-US keys are in sync.')
+        sys.exit(0)
+
+if __name__ == '__main__':
+    main()