feat: add RPM types and i18n translations

frontend/src/i18n/locales/en.ts

@@ -1613,7 +1613,12 @@ export default {
         sessions: {
           full: 'Active sessions full, new sessions must wait (idle timeout: {idle} min)',
           normal: 'Active sessions normal (idle timeout: {idle} min)'
-        }
+        },
+        rpm: {
+          full: 'RPM limit reached',
+          warning: 'RPM approaching limit',
+          normal: 'RPM normal',
+        },
       },
       tempUnschedulable: {
         title: 'Temp Unschedulable',
@@ -1828,6 +1833,17 @@ export default {
           idleTimeoutPlaceholder: '5',
           idleTimeoutHint: 'Sessions will be released after idle timeout'
         },
+        rpmLimit: {
+          label: 'RPM Limit',
+          hint: 'Limit requests per minute to protect upstream accounts',
+          baseRpm: 'Base RPM',
+          baseRpmPlaceholder: '15',
+          baseRpmHint: 'Max requests per minute, 0 or empty means no limit',
+          strategy: 'RPM Strategy',
+          strategyTiered: 'Tiered Model',
+          strategyStickyExempt: 'Sticky Exempt',
+          strategyHint: 'Tiered: gradually restrict when exceeded; Sticky Exempt: existing sessions unrestricted',
+        },
         tlsFingerprint: {
           label: 'TLS Fingerprint Simulation',
           hint: 'Simulate Node.js/Claude Code client TLS fingerprint'

frontend/src/i18n/locales/zh.ts

@@ -1664,7 +1664,12 @@ export default {
         sessions: {
           full: '活跃会话已满，新会话需等待（空闲超时：{idle}分钟）',
           normal: '活跃会话正常（空闲超时：{idle}分钟）'
-        }
+        },
+        rpm: {
+          full: '已达 RPM 上限',
+          warning: 'RPM 接近上限',
+          normal: 'RPM 正常',
+        },
       },
       clearRateLimit: '清除速率限制',
       testConnection: '测试连接',
@@ -1971,6 +1976,17 @@ export default {
           idleTimeoutPlaceholder: '5',
           idleTimeoutHint: '会话空闲超时后自动释放'
         },
+        rpmLimit: {
+          label: 'RPM 限制',
+          hint: '限制每分钟请求数量，保护上游账号',
+          baseRpm: '基础 RPM',
+          baseRpmPlaceholder: '15',
+          baseRpmHint: '每分钟最大请求数，0 或留空表示不限制',
+          strategy: 'RPM 策略',
+          strategyTiered: '三区模型',
+          strategyStickyExempt: '粘性豁免',
+          strategyHint: '三区模型: 超限后逐步限制; 粘性豁免: 已有会话不受限',
+        },
         tlsFingerprint: {
           label: 'TLS 指纹模拟',
           hint: '模拟 Node.js/Claude Code 客户端的 TLS 指纹'