feat: 添加5h窗口费用控制和会话数量限制

- 支持Anthropic OAuth/SetupToken账号的5h窗口费用阈值控制
- 支持账号级别的并发会话数量限制
- 使用Redis缓存窗口费用(30秒TTL)减少数据库压力
- 费用计算基于标准费用(不含账号倍率)

frontend/src/i18n/locales/en.ts

@@ -163,6 +163,7 @@ export default {
     notAvailable: 'N/A',
     now: 'Now',
     unknown: 'Unknown',
+    minutes: 'min',
     time: {
       never: 'Never',
       justNow: 'Just now',
@@ -1082,7 +1083,7 @@ export default {
         platformType: 'Platform/Type',
         platform: 'Platform',
         type: 'Type',
-        concurrencyStatus: 'Concurrency',
+        capacity: 'Capacity',
         notes: 'Notes',
         priority: 'Priority',
         billingRateMultiplier: 'Billing Rate',
@@ -1096,6 +1097,18 @@ export default {
         expiresAt: 'Expires At',
         actions: 'Actions'
       },
+      // Capacity status tooltips
+      capacity: {
+        windowCost: {
+          blocked: '5h window cost exceeded, account scheduling paused',
+          stickyOnly: '5h window cost at threshold, only sticky sessions allowed',
+          normal: '5h window cost normal'
+        },
+        sessions: {
+          full: 'Active sessions full, new sessions must wait (idle timeout: {idle} min)',
+          normal: 'Active sessions normal (idle timeout: {idle} min)'
+        }
+      },
       tempUnschedulable: {
         title: 'Temp Unschedulable',
         statusTitle: 'Temp Unschedulable Status',
@@ -1247,6 +1260,31 @@ export default {
         'When enabled, warmup requests like title generation will return mock responses without consuming upstream tokens',
       autoPauseOnExpired: 'Auto Pause On Expired',
       autoPauseOnExpiredDesc: 'When enabled, the account will auto pause scheduling after it expires',
+      // Quota control (Anthropic OAuth/SetupToken only)
+      quotaControl: {
+        title: 'Quota Control',
+        hint: 'Only applies to Anthropic OAuth/Setup Token accounts',
+        windowCost: {
+          label: '5h Window Cost Limit',
+          hint: 'Limit account cost usage within the 5-hour window',
+          limit: 'Cost Threshold',
+          limitPlaceholder: '50',
+          limitHint: 'Account will not participate in new scheduling after reaching threshold',
+          stickyReserve: 'Sticky Reserve',
+          stickyReservePlaceholder: '10',
+          stickyReserveHint: 'Additional reserve for sticky sessions'
+        },
+        sessionLimit: {
+          label: 'Session Count Limit',
+          hint: 'Limit the number of active concurrent sessions',
+          maxSessions: 'Max Sessions',
+          maxSessionsPlaceholder: '3',
+          maxSessionsHint: 'Maximum number of active concurrent sessions',
+          idleTimeout: 'Idle Timeout',
+          idleTimeoutPlaceholder: '5',
+          idleTimeoutHint: 'Sessions will be released after idle timeout'
+        }
+      },
       expired: 'Expired',
       proxy: 'Proxy',
       noProxy: 'No Proxy',

frontend/src/i18n/locales/zh.ts

@@ -160,6 +160,7 @@ export default {
     notAvailable: '不可用',
     now: '现在',
     unknown: '未知',
+    minutes: '分钟',
     time: {
       never: '从未',
       justNow: '刚刚',
@@ -1131,7 +1132,7 @@ export default {
         platformType: '平台/类型',
         platform: '平台',
         type: '类型',
-        concurrencyStatus: '并发',
+        capacity: '容量',
         notes: '备注',
         priority: '优先级',
         billingRateMultiplier: '账号倍率',
@@ -1145,6 +1146,18 @@ export default {
         expiresAt: '过期时间',
         actions: '操作'
       },
+      // 容量状态提示
+      capacity: {
+        windowCost: {
+          blocked: '5h窗口费用超限，账号暂停调度',
+          stickyOnly: '5h窗口费用达阈值，仅允许粘性会话',
+          normal: '5h窗口费用正常'
+        },
+        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）'
+        }
+      },
       clearRateLimit: '清除速率限制',
       testConnection: '测试连接',
       reAuthorize: '重新授权',
@@ -1380,6 +1393,31 @@ export default {
       interceptWarmupRequestsDesc: '启用后，标题生成等预热请求将返回 mock 响应，不消耗上游 token',
       autoPauseOnExpired: '过期自动暂停调度',
       autoPauseOnExpiredDesc: '启用后，账号过期将自动暂停调度',
+      // Quota control (Anthropic OAuth/SetupToken only)
+      quotaControl: {
+        title: '配额控制',
+        hint: '仅适用于 Anthropic OAuth/Setup Token 账号',
+        windowCost: {
+          label: '5h窗口费用控制',
+          hint: '限制账号在5小时窗口内的费用使用',
+          limit: '费用阈值',
+          limitPlaceholder: '50',
+          limitHint: '达到阈值后不参与新请求调度',
+          stickyReserve: '粘性预留额度',
+          stickyReservePlaceholder: '10',
+          stickyReserveHint: '为粘性会话预留的额外额度'
+        },
+        sessionLimit: {
+          label: '会话数量控制',
+          hint: '限制同时活跃的会话数量',
+          maxSessions: '最大会话数',
+          maxSessionsPlaceholder: '3',
+          maxSessionsHint: '同时活跃的最大会话数量',
+          idleTimeout: '空闲超时',
+          idleTimeoutPlaceholder: '5',
+          idleTimeoutHint: '会话空闲超时后自动释放'
+        }
+      },
       expired: '已过期',
       proxy: '代理',
       noProxy: '无代理',