From 72731a81cf7c3904e01700f64793c00d992330af Mon Sep 17 00:00:00 2001
From: erio <asakifeng@gmail.com>
Date: Wed, 1 Apr 2026 17:57:11 +0800
Subject: [PATCH] feat(ui): display three-level model mapping chain in usage
 logs

- Show channel + account mapping steps using model_mapping_chain field
- Add model_mapping_chain to AdminUsageLog TypeScript type
- Fallback to two-level display when chain is not available
- Fix cost nil guard in Anthropic/Antigravity RecordUsage paths
- Bump version to 0.1.105.31
---
 backend/cmd/server/VERSION                         |  2 +-
 frontend/src/components/admin/usage/UsageTable.vue | 10 +++++++++-
 frontend/src/types/index.ts                        |  1 +
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/backend/cmd/server/VERSION b/backend/cmd/server/VERSION
index 9694ebabda..856d2c1d87 100644
--- a/backend/cmd/server/VERSION
+++ b/backend/cmd/server/VERSION
@@ -1 +1 @@
-0.1.105.30
+0.1.105.31
diff --git a/frontend/src/components/admin/usage/UsageTable.vue b/frontend/src/components/admin/usage/UsageTable.vue
index 44f1805bdb..3a9f829b66 100644
--- a/frontend/src/components/admin/usage/UsageTable.vue
+++ b/frontend/src/components/admin/usage/UsageTable.vue
@@ -26,7 +26,15 @@
         </template>
 
         <template #cell-model="{ row }">
-          <div v-if="row.upstream_model && row.upstream_model !== row.model" class="space-y-0.5 text-xs">
+          <div v-if="row.model_mapping_chain && row.model_mapping_chain.includes('→')" class="space-y-0.5 text-xs">
+            <div v-for="(step, i) in row.model_mapping_chain.split('→')" :key="i"
+                 class="break-all"
+                 :class="i === 0 ? 'font-medium text-gray-900 dark:text-white' : 'text-gray-500 dark:text-gray-400'"
+                 :style="i > 0 ? `padding-left: ${i * 0.75}rem` : ''">
+              <span v-if="i > 0" class="mr-0.5">↳</span>{{ step }}
+            </div>
+          </div>
+          <div v-else-if="row.upstream_model && row.upstream_model !== row.model" class="space-y-0.5 text-xs">
             <div class="break-all font-medium text-gray-900 dark:text-white">
               {{ row.model }}
             </div>
diff --git a/frontend/src/types/index.ts b/frontend/src/types/index.ts
index aee0a30a7c..702f489215 100644
--- a/frontend/src/types/index.ts
+++ b/frontend/src/types/index.ts
@@ -1071,6 +1071,7 @@ export interface UsageLogAccountSummary {
 
 export interface AdminUsageLog extends UsageLog {
   upstream_model?: string | null
+  model_mapping_chain?: string | null
 
   // 账号计费倍率（仅管理员可见）
   account_rate_multiplier?: number | null