fix: align risk frontend field names with API response

- email -> account_name
- is_overridden -> idle_override

frontend/src/api/admin/risk.ts

@@ -11,12 +11,12 @@ export interface RiskSummary {
 
 export interface RiskAccountListItem {
   account_id: number
-  email: string
+  account_name: string
   platform: string
   risk_level: string
   risk_score: number
   scored_at: string
-  is_overridden: boolean
+  idle_override: boolean
 }
 
 export interface RiskAccountList {
@@ -35,12 +35,12 @@ export interface RiskBehaviorHour {
 
 export interface RiskAccountDetail {
   account_id: number
-  email: string
+  account_name: string
   platform: string
   risk_level: string
   risk_score: number
   scored_at: string
-  is_overridden: boolean
+  idle_override: boolean
   override_reason: string
   overridden_at: string
   behavior_24h: RiskBehaviorHour[]

frontend/src/components/admin/risk/RiskAccountDrawer.vue

@@ -37,7 +37,7 @@
           <div class="space-y-2 mb-6">
             <div class="flex justify-between text-sm">
               <span class="text-gray-500 dark:text-gray-400">{{ t('admin.risk.drawer.email') }}</span>
-              <span class="font-medium text-gray-900 dark:text-white">{{ detail.email }}</span>
+              <span class="font-medium text-gray-900 dark:text-white">{{ detail.account_name }}</span>
             </div>
             <div class="flex justify-between text-sm">
               <span class="text-gray-500 dark:text-gray-400">{{ t('admin.risk.drawer.platform') }}</span>
@@ -135,7 +135,7 @@ watch(
     if (id != null) {
       await riskStore.fetchAccountDetail(id)
       detail.value = riskStore.accountDetail
-      overrideLevel.value = riskStore.accountDetail?.risk_level ?? 'low'
+      overrideLevel.value = (riskStore.accountDetail?.risk_level ?? 'low').toLowerCase()
       overrideReason.value = ''
     } else {
       detail.value = null

frontend/src/views/admin/RiskControlView.vue

@@ -58,8 +58,8 @@
                   @click="openDetail(item.account_id)"
                 >
                   <td class="px-4 py-3 text-gray-900 dark:text-white truncate max-w-[200px]">
-                    {{ item.email }}
-                    <span v-if="item.is_overridden" class="ml-1 text-xs text-blue-500">{{ t('admin.risk.overridden') }}</span>
+                    {{ item.account_name }}
+                    <span v-if="item.idle_override" class="ml-1 text-xs text-blue-500">{{ t('admin.risk.overridden') }}</span>
                   </td>
                   <td class="px-4 py-3 text-gray-600 dark:text-gray-400 capitalize">{{ item.platform }}</td>
                   <td class="px-4 py-3">