feat: 管理端网站监控，浏览量写入独立 monitor.db

请求日志按日 JSONL；page_views 不进主库，避免统计数据撑大 jiang13.db。

Co-authored-by: Cursor <cursoragent@cursor.com>

service/ratelimit.go

@@ -57,6 +57,9 @@ func (r *RateLimiter) limitFor(action string) int {
 	if action == "community_heartbeat" {
 		return 30
 	}
+	if action == "monitor_pageview" {
+		return 120 // SPA 路由切换较频繁
+	}
 	return r.settings.RateLimitFor(action)
 }
 
@@ -67,6 +70,9 @@ func (r *RateLimiter) windowFor(action string) time.Duration {
 	if action == "community_heartbeat" {
 		return time.Hour
 	}
+	if action == "monitor_pageview" {
+		return time.Minute
+	}
 	return time.Duration(r.settings.RateLimitWindowSec()) * time.Second
 }