feat: 添加API Key时间窗口限流功能并移除累计总量限制

- 新增时间窗口限流功能，支持按分钟设置时间窗口
- 支持在时间窗口内限制请求次数和Token使用量
- 移除原有的累计总量限制，只保留时间窗口限制
- Token统计包含所有4种类型：输入、输出、缓存创建、缓存读取
- 前端UI优化，明确显示限流参数的作用范围
- 限流触发时提供友好的错误提示和重置时间

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/services/claudeRelayService.js

@@ -23,7 +23,7 @@ class ClaudeRelayService {
     
     try {
       // 调试日志：查看API Key数据
-      logger.info(`🔍 API Key data received:`, {
+      logger.info('🔍 API Key data received:', {
         apiKeyName: apiKeyData.name,
         enableModelRestriction: apiKeyData.enableModelRestriction,
         restrictedModels: apiKeyData.restrictedModels,
@@ -448,7 +448,7 @@ class ClaudeRelayService {
   async relayStreamRequestWithUsageCapture(requestBody, apiKeyData, responseStream, clientHeaders, usageCallback) {
     try {
       // 调试日志：查看API Key数据（流式请求）
-      logger.info(`🔍 [Stream] API Key data received:`, {
+      logger.info('🔍 [Stream] API Key data received:', {
         apiKeyName: apiKeyData.name,
         enableModelRestriction: apiKeyData.enableModelRestriction,
         restrictedModels: apiKeyData.restrictedModels,