Merge branch 'main' into test

# Conflicts:
#	backend/cmd/server/VERSION
#	backend/ent/migrate/schema.go
#	backend/ent/mutation.go
#	backend/ent/runtime/runtime.go
#	backend/ent/usagelog.go
#	backend/ent/usagelog/usagelog.go
#	backend/ent/usagelog/where.go
#	backend/ent/usagelog_create.go
#	backend/ent/usagelog_update.go
#	backend/internal/repository/usage_log_repo.go
#	backend/internal/server/api_contract_test.go
#	backend/internal/server/middleware/cors.go
#	backend/internal/service/gateway_service.go

frontend/src/i18n/locales/en.ts

@@ -576,6 +576,10 @@ export default {
     description: 'View and analyze your API usage history',
     costDetails: 'Cost Breakdown',
     tokenDetails: 'Token Breakdown',
+    cacheTtlOverriddenHint: 'Cache TTL Override enabled',
+    cacheTtlOverriddenLabel: 'TTL Override',
+    cacheTtlOverridden5m: 'Billed as 5m',
+    cacheTtlOverridden1h: 'Billed as 1h',
     totalRequests: 'Total Requests',
     totalTokens: 'Total Tokens',
     totalCost: 'Total Cost',
@@ -1617,6 +1621,12 @@ export default {
         sessionIdMasking: {
           label: 'Session ID Masking',
           hint: 'When enabled, fixes the session ID in metadata.user_id for 15 minutes, making upstream think requests come from the same session'
+        },
+        cacheTTLOverride: {
+          label: 'Cache TTL Override',
+          hint: 'Force all cache creation tokens to be billed as the selected TTL tier (5m or 1h)',
+          target: 'Target TTL',
+          targetHint: 'Select the TTL tier for billing'
         }
       },
       expired: 'Expired',

frontend/src/i18n/locales/zh.ts

@@ -582,6 +582,10 @@ export default {
     description: '查看和分析您的 API 使用历史',
     costDetails: '成本明细',
     tokenDetails: 'Token 明细',
+    cacheTtlOverriddenHint: '缓存 TTL Override 已启用',
+    cacheTtlOverriddenLabel: 'TTL 替换',
+    cacheTtlOverridden5m: '按 5m 计费',
+    cacheTtlOverridden1h: '按 1h 计费',
     totalRequests: '总请求数',
     totalTokens: '总 Token',
     totalCost: '总消费',
@@ -1762,6 +1766,12 @@ export default {
         sessionIdMasking: {
           label: '会话 ID 伪装',
           hint: '启用后将在 15 分钟内固定 metadata.user_id 中的 session ID，使上游认为请求来自同一会话'
+        },
+        cacheTTLOverride: {
+          label: '缓存 TTL 强制替换',
+          hint: '将所有缓存创建 token 强制按指定的 TTL 类型（5分钟或1小时）计费',
+          target: '目标 TTL',
+          targetHint: '选择计费使用的 TTL 类型'
         }
       },
       expired: '已过期',