diff --git a/apps/api/src/api/v1/webhooks.py b/apps/api/src/api/v1/webhooks.py
index f5109649..68dcd7f9 100644
--- a/apps/api/src/api/v1/webhooks.py
+++ b/apps/api/src/api/v1/webhooks.py
@@ -1099,17 +1099,67 @@ async def alertmanager_webhook(
                 approval_created=False,
             )
 
-    # 映射 alertname → alert_type
+    # BUG-008 修復 2026-04-11: 從 9 筆擴充為完整涵蓋 alerts-unified.yml 全部 42 個 alertname
+    # 新規則由 layer/component 語意推導，取代靜態小表
     alertname_to_type = {
-        "KubePodCrashLooping": "k8s_pod_crash",
-        "KubePodNotReady": "k8s_pod_crash",
-        "KubeNodeNotReady": "k8s_node_failure",
-        "KubeNodeUnreachable": "k8s_node_failure",
-        "HighCPUUsage": "high_cpu",
-        "HighMemoryUsage": "high_memory",
-        "DiskSpaceLow": "disk_full",
-        "SSLCertExpiringSoon": "ssl_expiry",
-        "TargetDown": "service_404",
+        # --- 主機層 (host_alerts) ---
+        "HostDown":                          "host_down",
+        "HostHighCpuLoad":                   "host_cpu",
+        "HostOutOfMemory":                   "host_memory",
+        "HostOutOfDiskSpace":                "disk_full",
+        "HostBackupFailed":                  "backup_failure",
+        # --- K8s 層 (kubernetes_alerts) ---
+        "K3sNodeNotReady":                   "k8s_node_failure",
+        "KubePodCrashLooping":               "k8s_pod_crash",
+        "KubePodNotReady":                   "k8s_pod_crash",
+        "KubeNodeNotReady":                  "k8s_node_failure",
+        "KubeNodeUnreachable":               "k8s_node_failure",
+        "KubeDeploymentReplicasMismatch":     "k8s_deployment_mismatch",
+        "VeleroBackupFailed":                "backup_failure",
+        "VeleroBackupNotRun":                "backup_failure",
+        # --- 資料庫 (database_alerts / database_detail_alerts) ---
+        "PostgreSQLDown":                    "database_down",
+        "RedisDown":                         "database_down",
+        "PostgreSQLHighConnections":         "database_performance",
+        "RedisMemoryHigh":                   "high_memory",
+        "PostgreSQLSlowQueries":             "database_performance",
+        "PostgreSQLDeadlocks":               "database_performance",
+        "PostgreSQLTooManyConnections":      "database_performance",
+        "RedisKeyEviction":                  "database_performance",
+        "RedisConnectionsHigh":              "database_performance",
+        "RedisCommandLatencyHigh":           "database_performance",
+        # --- 服務可用性 (service_alerts) ---
+        "OpenClawDown":                      "service_down",
+        "SignOzDown":                        "service_down",
+        "SentryDown":                        "service_down",
+        "HarborDown":                        "service_down",
+        "GiteaDown":                         "service_down",
+        "AlertmanagerDown":                  "service_down",
+        "MinIODown":                         "service_down",
+        "KaliScannerDown":                   "service_down",
+        # --- 外部網站 (external_website_alerts) ---
+        "MoWoooWorkDown":                    "service_404",
+        "TsenyangWebsiteDown":               "service_404",
+        "StockWoooWorkDown":                 "service_404",
+        "BitanWoooWorkDown":                 "service_404",
+        "ExternalSiteSSLExpiringSoon":       "ssl_expiry",
+        # --- 告警鏈路 (alert_chain) ---
+        "AlertChainBroken_Alertmanager":     "alert_chain_broken",
+        "AlertChainBroken_Sentry":           "alert_chain_broken",
+        "NoAlertsReceived2Hours":            "alert_chain_broken",
+        "AlertChainUnhealthy":               "alert_chain_broken",
+        # --- Docker 容器 (docker_health_alerts) ---
+        "DockerContainerUnhealthy":          "docker_container_unhealthy",
+        "DockerContainerExited":             "docker_container_unhealthy",
+        # --- 自動修復監控 (auto_repair) ---
+        "AutoRepairLowSuccessRate":          "auto_repair_degraded",
+        "PermanentFixRequired":              "auto_repair_degraded",
+        # --- 舊版相容 ---
+        "HighCPUUsage":                      "high_cpu",
+        "HighMemoryUsage":                   "high_memory",
+        "DiskSpaceLow":                      "disk_full",
+        "SSLCertExpiringSoon":               "ssl_expiry",
+        "TargetDown":                        "service_404",
     }
     alert_type = alertname_to_type.get(alertname, "custom")