feat: 添加 Anthropic 缓存 TTL 注入开关

frontend/src/i18n/locales/en.ts

@@ -5019,6 +5019,8 @@ export default {
         metadataPassthroughHint: 'Pass through client\'s original metadata.user_id without rewriting. May improve upstream cache hit rates.',
         cchSigning: 'CCH Signing',
         cchSigningHint: 'Sign the billing header in forwarded requests with CCH hash. When disabled, the placeholder is preserved.',
+        anthropicCacheTTL1hInjection: 'Anthropic Cache TTL Injection',
+        anthropicCacheTTL1hInjectionHint: 'When enabled, existing ephemeral cache_control blocks in Anthropic OAuth/Setup Token request bodies are forced to 1h; response usage is billed back as 5m by default, with account-level TTL billing override taking priority.',
       },
       webSearchEmulation: {
         title: 'Web Search Emulation',

frontend/src/i18n/locales/zh.ts

@@ -5178,6 +5178,8 @@ export default {
         metadataPassthroughHint: '透传客户端原始 metadata.user_id，不进行重写。可能提高上游缓存命中率。',
         cchSigning: 'CCH 签名',
         cchSigningHint: '对转发请求的 billing header 进行 CCH 哈希签名。关闭时保留原始占位符。',
+        anthropicCacheTTL1hInjection: 'Anthropic 缓存 TTL 注入',
+        anthropicCacheTTL1hInjectionHint: '开启后，对 Anthropic OAuth/Setup Token 请求体中已有的 ephemeral 缓存块强制写入 1h；响应 usage 默认按 5m 回写计费，账号级 TTL 计费设置优先。',
       },
       webSearchEmulation: {
         title: 'Web Search 模拟',