fix(ci): resolve all lint and test failures

- Go: nil-safe profile cache in SNMPCollector, updated test assertion
- ESLint: fix conditional useQuery hook in SNMPMetricsSection
- ESLint: remove unused CREDENTIAL_TYPE_LABELS, ChevronDown/Right,
  EmptyState import, advancedOpen state
- TypeScript: replace empty interface with type alias

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/fleet/SNMPMetricsSection.tsx

@@ -15,14 +15,14 @@ interface SNMPMetricsSectionProps {
  * and are shown by InterfaceGauges. Custom OID charting is Phase 20 (PROF-03).
  */
 export function SNMPMetricsSection({ tenantId, snmpProfileId }: SNMPMetricsSectionProps) {
-  if (!snmpProfileId) return null
-
   const { data: profile } = useQuery({
     queryKey: ['snmp-profile', tenantId, snmpProfileId],
     queryFn: () => snmpProfilesApi.get(tenantId, snmpProfileId!),
-    enabled: !!snmpProfileId,
+    enabled: !!snmpProfileId && !!tenantId,
   })
 
+  if (!snmpProfileId) return null
+
   return (
     <div className="rounded-sm border border-border-default bg-panel px-3 py-2">
       <div className="flex items-center gap-2 mb-1">

frontend/src/components/settings/CredentialProfilesPage.tsx

@@ -35,11 +35,6 @@ interface CredentialProfilesPageProps {
 type CredentialType = 'routeros' | 'snmp_v2c' | 'snmp_v3'
 type SecurityLevel = 'no_auth_no_priv' | 'auth_no_priv' | 'auth_priv'
 
-const CREDENTIAL_TYPE_LABELS: Record<CredentialType, string> = {
-  routeros: 'RouterOS',
-  snmp_v2c: 'SNMP v2c',
-  snmp_v3: 'SNMP v3',
-}
 
 const SECURITY_LEVELS: { value: SecurityLevel; label: string }[] = [
   { value: 'no_auth_no_priv', label: 'No Auth, No Privacy' },

frontend/src/components/settings/SNMPProfileEditorPage.tsx

@@ -10,8 +10,6 @@ import {
   X,
   Network,
   Copy,
-  ChevronDown,
-  ChevronRight,
 } from 'lucide-react'
 import {
   snmpProfilesApi,
@@ -33,7 +31,6 @@ import {
   SelectValue,
 } from '@/components/ui/select'
 import { Tabs, TabsList, TabsTrigger, TabsContent } from '@/components/ui/tabs'
-import { EmptyState } from '@/components/ui/empty-state'
 import { OIDTreeBrowser } from '@/components/settings/OIDTreeBrowser'
 import { ProfileTestPanel } from '@/components/settings/ProfileTestPanel'
 
@@ -208,7 +205,6 @@ export function SNMPProfileEditorPage({ tenantId }: SNMPProfileEditorPageProps)
   const [pollGroups, setPollGroups] = useState<Record<PollGroupKey, PollGroup>>(buildEmptyPollGroups)
   const [activePollGroup, setActivePollGroup] = useState<PollGroupKey>('standard')
   const [selectedOids, setSelectedOids] = useState<Set<string>>(new Set())
-  const [advancedOpen, setAdvancedOpen] = useState(false)
 
   // ─── MIB state ─────────────────────────────────────────────────────────
 

frontend/src/lib/api.ts

@@ -495,7 +495,7 @@ export interface CredentialProfileCreate {
   priv_passphrase?: string
 }
 
-export interface CredentialProfileUpdate extends Partial<CredentialProfileCreate> {}
+export type CredentialProfileUpdate = Partial<CredentialProfileCreate>
 
 export const credentialProfilesApi = {
   list: (tenantId: string, credentialType?: string) =>